Merge pull request #2 from pboehm/docker_and_rework
Docker-Setup and Rework
This commit is contained in:
Philipp Böhm
GitHub
commit
c922c49e48
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@ -1,5 +1,4 @@
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*.swp
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pdns.conf
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pdns_backend.py
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ddns
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/docker/docker-compose.*.yml
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/ddns
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dump.rdb
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2
LICENSE
2
LICENSE
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@ -1,6 +1,6 @@
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The MIT License (MIT)
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Copyright (c) 2014 Philipp Böhm
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Copyright (c) 2018 Philipp Böhm
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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143
README.md
143
README.md
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@ -1,109 +1,86 @@
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ddns
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====
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# `ddns` - Dynamic DNS
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A self-hosted Dynamic DNS solution similar to DynDNS or NO-IP.
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You can use a hosted version at [ddns.pboehm.org](http://ddns.pboehm.org/) where you can register a host under the `d.pboehm.de` domain (e.g `test.d.pboehm.de`).
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You can use a hosted version at [ddns.pboehm.de](https://ddns.pboehm.de/) where you can register a
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host under the `d.pboehm.de` domain (e.g `test.d.pboehm.de`).
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**Recent Changes**
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`ddns` has been massively restructured and refactored and now uses the PowerDNS
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[Remote Backend](https://doc.powerdns.com/md/authoritative/backend-remote/) instead
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of the [Pipe Backend](https://doc.powerdns.com/md/authoritative/backend-pipe/), which
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is far easier to deploy. It now serves both the frontend and the backend other HTTP using different ports.
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The old `ddns` source code can be found at the [legacy](https://github.com/pboehm/ddns/tree/legacy) tag.
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## How can I update my IP if it changes?
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`ddns` is built around a small webservice, so that you can update your IP address, simply by calling an URL periodically through `curl` (using `cron`). Hosts that haven't been updated for 10 days will be automatically removed. This can be configured in your own instance.
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`ddns` is built around a small webservice, so that you can update your IP address simply by calling
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an URL periodically through `curl`. Hosts that haven't been updated for 10 days will
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be automatically removed. This can be configured in your own instance.
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An API similar to DynDNS/NO-IP hasn't been implemented yet.
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An API similar to DynDNS/NO-IP has not been implemented yet.
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## Self-Hosting
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### Requirements
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* A custom domain where the registrar allows NS-Records for subdomains
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* A global accessible Server running an OS which is supported by the tools listed below
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* A running [Redis](http://redis.io) instance for data storage
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* An installation of [PowerDNS](https://www.powerdns.com/) with the Pipe-Backend included
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* [Go](http://golang.org/) 1.3
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* A custom domain where the registrar allows setting `NS` records for subdomains. This is important because not all
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DNS providers support this.
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* A server with [docker](https://www.docker.com/) and [docker-compose](https://docs.docker.com/compose/) installed
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* The following ports should be opened in the firewall:
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* `53/udp`
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* `80/tcp`
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* `443/tcp`
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### Installation
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### DNS-Setup
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The following instructions are valid for Ubuntu/Debian. Some files/packages
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could have other names/locations, please search for it.
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For the domain you want to use with `ddns` (`example.net` in the following sections, please adjust this to your domain)
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you have to create the following two DNS records:
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You should have a working Go environment (correct `$GOPATH`).
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* `ddns.example.net` as a `CNAME` or `A`/`AAAA` record pointing to the server `ddns` will be running on. This record
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will be used for accessing the `ddns` frontend in your browser or via `curl`. It is also the target for the
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corresponding `NS` record.
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* `d.example.net` as an `NS` record pointing to the previously created `ddns.example.net` record. This will delegate
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all subdomains under `d.example.net` to the PowerDNS server running on `ddns.example.net`.
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$ go version # check that you have go 1.3 installed
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go version go1.3 linux/amd64
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### `ddns`-Setup
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Then install `ddns` via:
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Setting up `ddns` was kind of a hassle in the legacy version, because there are multiple components that have to
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work together:
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$ go get github.com/pboehm/ddns
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$ ls $GOPATH/bin/ddns # the displayed path will be used later
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/home/user/gocode/bin/ddns
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* `ddns` that runs the frontend and provides and provides an API compatible with the
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[Remote Backend](https://doc.powerdns.com/md/authoritative/backend-remote/)
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* Redis as storage backend for `ddns`
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* PowerDNS as DNS server, which uses the `ddns` backend API on Port `8053`
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* A web server that makes the `ddns` frontend accessible to the Internet through HTTPS
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#### Backend
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The setup is now automated using [docker-compose](https://docs.docker.com/compose/) and only some customization has
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to be made in a `docker-compose.override.yml` file.
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Install `pdns` and `redis-server`:
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#### Configuring the Setup
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$ sudo apt-get install redis-server pdns-server pdns-backend-pipe
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The setup included in this repository contains all the components described above and uses
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[caddy](https://caddyserver.com/) as a web server, because it provides automatic HTTPS using Lets Encrypt.
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Both services should start at boot automatically. You should open `udp/53` and
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`tcp/53` on your Firewall so that `pdns` can be be used from outside of your
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host.
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```
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git clone git@github.com:pboehm/ddns.git
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cd ddns/docker
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cp docker-compose.override.yml.sample docker-compose.override.yml
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```
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$ sudo vim /etc/powerdns/pdns.d/pipe.conf
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Please adjust the settings in `docker-compose.override.yml` marked with the `#<<< ....` comments as follows:
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`pipe.conf` should have the following content. Please adjust the path of `ddns`
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and the values supplied to `--domain` and `--soa_fqdn`:
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* adjust the domain part in lines marked with `# <<< ADJUST DOMAIN` according to your DNS-Setup
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* insert your email address in lines marked with `# <<< INSERT EMAIL` which is required for getting certificates
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from Lets Encrypt
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* adjust the path component before the `:` in lines marked with `# <<< ADJUST LOCAL PATH` if the shown path
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does not meet your requirements
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launch=pipe
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pipebackend-abi-version=1
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pipe-command=/home/user/gocode/bin/ddns --soa_fqdn=dns.example.com --domain=sub.example.com backend
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Finally execute the following `docker-compose` command, which creates 4 containers in detached mode which are also
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started automatically after reboot.
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Then restart `pdns`:
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$ sudo service pdns restart
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#### Frontend
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`ddns` includes a webservice which is used for creating new hosts and updating
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ip addresses. I prefer using `nginx` as a reverse proxy and not running `ddns`
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on port 80. As a process manager, I prefer using `supervisord` so it is
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described here.
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$ sudo apt-get install nginx supervisor
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Create a supervisor config file for ddns:
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$ sudo vim /etc/supervisor/conf.d/ddns.conf
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$ cat /etc/supervisor/conf.d/ddns.conf
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[program:ddns]
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directory = /tmp/
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user = user
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command = /home/user/gocode/bin/ddns --domain=sub.example.com web
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autostart = True
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autorestart = True
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redirect_stderr = True
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Restart the `supervisor` daemon and `ddns` listens on Port 8080 (can be
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changed by adding `--listen=:1234`).
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$ sudo service supervisor restart
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Now you have to add a nginx virtual host for `ddns`:
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$ sudo vim /etc/nginx/sites-enabled/default
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$ cat /etc/nginx/sites-enabled/default
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server {
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listen 80;
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server_name ddns.example.com;
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location / {
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proxy_pass http://127.0.0.1:8080;
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proxy_set_header Host $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-for $proxy_add_x_forwarded_for;
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proxy_connect_timeout 300;
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}
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}
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Please adjust the `server_name` with a valid FQDN. Now we only have to restart
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`nginx`:
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$ sudo service nginx restart
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```
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docker-compose --project-name ddns up -d
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```
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99
backend.go
99
backend.go
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@ -1,99 +0,0 @@
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package main
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import (
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"bufio"
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"fmt"
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"os"
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"strings"
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"time"
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)
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type responder func()
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func respondWithFAIL() {
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fmt.Printf("FAIL\n")
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}
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func respondWithEND() {
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fmt.Printf("END\n")
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}
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// This function implements the PowerDNS-Pipe-Backend protocol and generates
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// the response data it possible
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func RunBackend(conn *RedisConnection) {
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bio := bufio.NewReader(os.Stdin)
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// handshake with PowerDNS
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_, _, _ = bio.ReadLine()
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fmt.Printf("OK\tDDNS Go Backend\n")
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for {
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line, _, err := bio.ReadLine()
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if err != nil {
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respondWithFAIL()
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continue
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}
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HandleRequest(string(line), conn)()
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}
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}
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func HandleRequest(line string, conn *RedisConnection) responder {
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if Verbose {
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fmt.Printf("LOG\t'%s'\n", line)
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}
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parts := strings.Split(line, "\t")
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if len(parts) != 6 {
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return respondWithFAIL
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}
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query_name := parts[1]
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query_class := parts[2]
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query_type := parts[3]
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query_id := parts[4]
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var response, record string
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record = query_type
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switch query_type {
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case "SOA":
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response = fmt.Sprintf("%s. hostmaster.example.com. %d 1800 3600 7200 5",
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DdnsSoaFqdn, getSoaSerial())
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case "NS":
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response = fmt.Sprintf("%s.", DdnsSoaFqdn)
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case "A":
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case "ANY":
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// get the host part of the fqdn: pi.d.example.org -> pi
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hostname := ""
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if strings.HasSuffix(query_name, DdnsDomain) {
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hostname = query_name[:len(query_name)-len(DdnsDomain)]
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}
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if hostname == "" || !conn.HostExist(hostname) {
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return respondWithFAIL
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}
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host := conn.GetHost(hostname)
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response = host.Ip
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record = "A"
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if !host.IsIPv4() {
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record = "AAAA"
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}
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default:
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return respondWithFAIL
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}
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fmt.Printf("DATA\t%s\t%s\t%s\t10\t%s\t%s\n",
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query_name, query_class, record, query_id, response)
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return respondWithEND
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}
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func getSoaSerial() int64 {
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// return current time in milliseconds
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return time.Now().UnixNano()
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}
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@ -0,0 +1,59 @@
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package backend
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import (
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"github.com/pboehm/ddns/shared"
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"gopkg.in/gin-gonic/gin.v1"
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"log"
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"strings"
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)
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type Backend struct {
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config *shared.Config
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lookup *HostLookup
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}
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func NewBackend(config *shared.Config, lookup *HostLookup) *Backend {
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return &Backend{
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config: config,
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lookup: lookup,
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}
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}
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func (b *Backend) Run() error {
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r := gin.New()
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r.Use(gin.Recovery())
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if b.config.Verbose {
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r.Use(gin.Logger())
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}
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r.GET("/dnsapi/lookup/:qname/:qtype", func(c *gin.Context) {
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request := &Request{
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QName: strings.TrimRight(c.Param("qname"), "."),
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QType: c.Param("qtype"),
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}
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response, err := b.lookup.Lookup(request)
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if err == nil {
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c.JSON(200, gin.H{
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"result": []*Response{response},
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})
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} else {
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if b.config.Verbose {
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log.Printf("Error during lookup: %v", err)
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}
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c.JSON(200, gin.H{
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"result": false,
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})
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}
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})
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r.GET("/dnsapi/getDomainMetadata/:name/:kind", func(c *gin.Context) {
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c.JSON(200, gin.H{
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"result": false,
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})
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})
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return r.Run(b.config.ListenBackend)
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}
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@ -0,0 +1,96 @@
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package backend
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import (
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"errors"
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"fmt"
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"github.com/pboehm/ddns/shared"
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"strings"
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"time"
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)
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type Request struct {
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QType string
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QName string
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Remote string
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Local string
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RealRemote string
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ZoneId string
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}
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type Response struct {
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QType string `json:"qtype"`
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QName string `json:"qname"`
|
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Content string `json:"content"`
|
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TTL int `json:"ttl"`
|
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}
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type HostLookup struct {
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config *shared.Config
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hosts shared.HostBackend
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}
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|
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func NewHostLookup(config *shared.Config, hostsBackend shared.HostBackend) *HostLookup {
|
||||
return &HostLookup{config, hostsBackend}
|
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}
|
||||
|
||||
func (l *HostLookup) Lookup(request *Request) (*Response, error) {
|
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responseRecord := request.QType
|
||||
responseContent := ""
|
||||
|
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switch request.QType {
|
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case "SOA":
|
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responseContent = fmt.Sprintf("%s. hostmaster%s. %d 1800 3600 7200 5",
|
||||
l.config.SOAFqdn, l.config.Domain, l.currentSOASerial())
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||||
|
||||
case "NS":
|
||||
responseContent = l.config.SOAFqdn
|
||||
|
||||
case "A", "AAAA", "ANY":
|
||||
hostname, err := l.extractHostname(request.QName)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
var host *shared.Host
|
||||
if host, err = l.hosts.GetHost(hostname); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
responseContent = host.Ip
|
||||
|
||||
responseRecord = "A"
|
||||
if !host.IsIPv4() {
|
||||
responseRecord = "AAAA"
|
||||
}
|
||||
|
||||
if (request.QType == "A" || request.QType == "AAAA") && request.QType != responseRecord {
|
||||
return nil, errors.New("IP address is not valid for requested record")
|
||||
}
|
||||
|
||||
default:
|
||||
return nil, errors.New("Invalid request")
|
||||
}
|
||||
|
||||
return &Response{QType: responseRecord, QName: request.QName, Content: responseContent, TTL: 5}, nil
|
||||
}
|
||||
|
||||
// extractHostname extract the host part of the fqdn: pi.d.example.org -> pi
|
||||
func (l *HostLookup) extractHostname(rawQueryName string) (string, error) {
|
||||
queryName := strings.ToLower(rawQueryName)
|
||||
|
||||
hostname := ""
|
||||
if strings.HasSuffix(queryName, l.config.Domain) {
|
||||
hostname = queryName[:len(queryName)-len(l.config.Domain)]
|
||||
}
|
||||
|
||||
if hostname == "" {
|
||||
return "", errors.New("Query name does not correspond to our domain")
|
||||
}
|
||||
|
||||
return hostname, nil
|
||||
}
|
||||
|
||||
// currentSOASerial get the current SOA serial by returning the current time in seconds
|
||||
func (l *HostLookup) currentSOASerial() int64 {
|
||||
return time.Now().Unix()
|
||||
}
|
||||
|
|
@ -0,0 +1,153 @@
|
|||
package backend
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"github.com/pboehm/ddns/shared"
|
||||
"github.com/stretchr/testify/assert"
|
||||
"testing"
|
||||
)
|
||||
|
||||
type testHostBackend struct {
|
||||
hosts map[string]*shared.Host
|
||||
}
|
||||
|
||||
func (b *testHostBackend) GetHost(hostname string) (*shared.Host, error) {
|
||||
host, ok := b.hosts[hostname]
|
||||
if ok {
|
||||
return host, nil
|
||||
} else {
|
||||
return nil, errors.New("Host not found")
|
||||
}
|
||||
}
|
||||
|
||||
func (b *testHostBackend) SetHost(host *shared.Host) error {
|
||||
b.hosts[host.Hostname] = host
|
||||
return nil
|
||||
}
|
||||
|
||||
func buildLookup(domain string) (*shared.Config, *testHostBackend, *HostLookup) {
|
||||
config := &shared.Config{
|
||||
Verbose: false,
|
||||
Domain: domain,
|
||||
SOAFqdn: "dns" + domain,
|
||||
}
|
||||
|
||||
hosts := &testHostBackend{
|
||||
hosts: map[string]*shared.Host{
|
||||
"www": {
|
||||
Hostname: "www",
|
||||
Ip: "10.11.12.13",
|
||||
Token: "abcdef",
|
||||
},
|
||||
"v4": {
|
||||
Hostname: "v4",
|
||||
Ip: "10.10.10.10",
|
||||
Token: "ghijkl",
|
||||
},
|
||||
"v6": {
|
||||
Hostname: "v6",
|
||||
Ip: "2001:db8:85a3::8a2e:370:7334",
|
||||
Token: "ghijkl",
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
return config, hosts, &HostLookup{config, hosts}
|
||||
}
|
||||
|
||||
func buildRequest(queryName, queryType string) *Request {
|
||||
return &Request{
|
||||
QType: queryType,
|
||||
QName: queryName,
|
||||
}
|
||||
}
|
||||
|
||||
func TestRequestHandling(t *testing.T) {
|
||||
_, _, lookup := buildLookup(".example.org")
|
||||
|
||||
response, err := lookup.Lookup(buildRequest("example.org", "SOA"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "SOA", response.QType)
|
||||
assert.Equal(t, "example.org", response.QName)
|
||||
assert.Regexp(t, "dns\\.example\\.org\\. hostmaster\\.example.org\\. \\d+ 1800 3600 7200 5", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("example.org", "NS"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "NS", response.QType)
|
||||
assert.Equal(t, "example.org", response.QName)
|
||||
assert.Equal(t, "dns.example.org", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("www.example.org", "ANY"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "A", response.QType)
|
||||
assert.Equal(t, "www.example.org", response.QName)
|
||||
assert.Equal(t, "10.11.12.13", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("www.example.org", "A"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "A", response.QType)
|
||||
assert.Equal(t, "www.example.org", response.QName)
|
||||
assert.Equal(t, "10.11.12.13", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
// Allow hostname to be mixed case which is used by Let's Encrypt for a little bit more security
|
||||
response, err = lookup.Lookup(buildRequest("wWW.eXaMPlE.oRg", "A"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "A", response.QType)
|
||||
assert.Equal(t, "wWW.eXaMPlE.oRg", response.QName)
|
||||
assert.Equal(t, "10.11.12.13", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("notexisting.example.org", "A"))
|
||||
assert.NotNil(t, err)
|
||||
assert.Nil(t, response)
|
||||
|
||||
// Correct Handling of IPv4/IPv6 and ANY/A/AAAA
|
||||
response, err = lookup.Lookup(buildRequest("v4.example.org", "ANY"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "A", response.QType)
|
||||
assert.Equal(t, "v4.example.org", response.QName)
|
||||
assert.Equal(t, "10.10.10.10", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("v4.example.org", "A"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "A", response.QType)
|
||||
assert.Equal(t, "v4.example.org", response.QName)
|
||||
assert.Equal(t, "10.10.10.10", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("v4.example.org", "AAAA"))
|
||||
assert.NotNil(t, err)
|
||||
assert.Nil(t, response)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("v6.example.org", "ANY"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "AAAA", response.QType)
|
||||
assert.Equal(t, "v6.example.org", response.QName)
|
||||
assert.Equal(t, "2001:db8:85a3::8a2e:370:7334", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("v6.example.org", "AAAA"))
|
||||
assert.Nil(t, err)
|
||||
assert.NotNil(t, response)
|
||||
assert.Equal(t, "AAAA", response.QType)
|
||||
assert.Equal(t, "v6.example.org", response.QName)
|
||||
assert.Equal(t, "2001:db8:85a3::8a2e:370:7334", response.Content)
|
||||
assert.Equal(t, 5, response.TTL)
|
||||
|
||||
response, err = lookup.Lookup(buildRequest("v6.example.org", "A"))
|
||||
assert.NotNil(t, err)
|
||||
assert.Nil(t, response)
|
||||
}
|
||||
99
ddns.go
99
ddns.go
|
|
@ -1,92 +1,37 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"flag"
|
||||
"github.com/pboehm/ddns/backend"
|
||||
"github.com/pboehm/ddns/frontend"
|
||||
"github.com/pboehm/ddns/shared"
|
||||
"golang.org/x/sync/errgroup"
|
||||
"log"
|
||||
"strings"
|
||||
)
|
||||
|
||||
func HandleErr(err error) {
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
|
||||
const (
|
||||
CmdBackend string = "backend"
|
||||
CmdWeb string = "web"
|
||||
)
|
||||
|
||||
var (
|
||||
DdnsDomain string
|
||||
DdnsWebListenSocket string
|
||||
DdnsRedisHost string
|
||||
DdnsSoaFqdn string
|
||||
Verbose bool
|
||||
)
|
||||
var serviceConfig *shared.Config = &shared.Config{}
|
||||
|
||||
func init() {
|
||||
flag.StringVar(&DdnsDomain, "domain", "",
|
||||
"The subdomain which should be handled by DDNS")
|
||||
|
||||
flag.StringVar(&DdnsWebListenSocket, "listen", ":8080",
|
||||
"Which socket should the web service use to bind itself")
|
||||
|
||||
flag.StringVar(&DdnsRedisHost, "redis", ":6379",
|
||||
"The Redis socket that should be used")
|
||||
|
||||
flag.StringVar(&DdnsSoaFqdn, "soa_fqdn", "",
|
||||
"The FQDN of the DNS server which is returned as a SOA record")
|
||||
|
||||
flag.BoolVar(&Verbose, "verbose", false,
|
||||
"Be more verbose")
|
||||
}
|
||||
|
||||
func ValidateCommandArgs(cmd string) {
|
||||
if DdnsDomain == "" {
|
||||
log.Fatal("You have to supply the domain via --domain=DOMAIN")
|
||||
} else if !strings.HasPrefix(DdnsDomain, ".") {
|
||||
// get the domain in the right format
|
||||
DdnsDomain = "." + DdnsDomain
|
||||
}
|
||||
|
||||
if cmd == CmdBackend {
|
||||
if DdnsSoaFqdn == "" {
|
||||
log.Fatal("You have to supply the server FQDN via --soa_fqdn=FQDN")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func PrepareForExecution() string {
|
||||
flag.Parse()
|
||||
|
||||
if len(flag.Args()) != 1 {
|
||||
usage()
|
||||
}
|
||||
cmd := flag.Args()[0]
|
||||
|
||||
ValidateCommandArgs(cmd)
|
||||
return cmd
|
||||
serviceConfig.Initialize()
|
||||
}
|
||||
|
||||
func main() {
|
||||
cmd := PrepareForExecution()
|
||||
serviceConfig.Validate()
|
||||
|
||||
conn := OpenConnection(DdnsRedisHost)
|
||||
defer conn.Close()
|
||||
redis := shared.NewRedisBackend(serviceConfig)
|
||||
defer redis.Close()
|
||||
|
||||
switch cmd {
|
||||
case CmdBackend:
|
||||
log.Printf("Starting PDNS Backend\n")
|
||||
RunBackend(conn)
|
||||
case CmdWeb:
|
||||
log.Printf("Starting Web Service\n")
|
||||
RunWebService(conn)
|
||||
default:
|
||||
usage()
|
||||
var group errgroup.Group
|
||||
|
||||
group.Go(func() error {
|
||||
lookup := backend.NewHostLookup(serviceConfig, redis)
|
||||
return backend.NewBackend(serviceConfig, lookup).Run()
|
||||
})
|
||||
|
||||
group.Go(func() error {
|
||||
return frontend.NewFrontend(serviceConfig, redis).Run()
|
||||
})
|
||||
|
||||
if err := group.Wait(); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
|
||||
func usage() {
|
||||
log.Fatal("Usage: ./ddns [backend|web]")
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,6 @@
|
|||
{$DDNS_CADDY_DOMAIN} {
|
||||
tls {$DDNS_CADDY_TLS_EMAIL}
|
||||
proxy / {$DDNS_FRONTEND_HOST} {
|
||||
transparent
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
FROM golang:1.9-alpine3.7
|
||||
|
||||
RUN apk add --no-cache git
|
||||
|
||||
WORKDIR /go/src/github.com/pboehm/ddns
|
||||
COPY . .
|
||||
|
||||
RUN go-wrapper download # "go get -d -v ./..."
|
||||
RUN go-wrapper install # "go install -v ."
|
||||
|
||||
ENV GIN_MODE release
|
||||
|
||||
CMD /go/bin/ddns --domain=${DDNS_DOMAIN} --soa_fqdn=${DDNS_SOA_DOMAIN} --redis=${DDNS_REDIS_HOST}
|
||||
|
|
@ -0,0 +1,31 @@
|
|||
version: '2'
|
||||
|
||||
services:
|
||||
ddns:
|
||||
environment:
|
||||
DDNS_DOMAIN: d.example.net # <<< ADJUST DOMAIN
|
||||
DDNS_SOA_DOMAIN: ddns.example.net # <<< ADJUST DOMAIN
|
||||
|
||||
powerdns:
|
||||
ports:
|
||||
- "53/udp:53/udp"
|
||||
|
||||
redis:
|
||||
volumes:
|
||||
- "/root/ddns-redis:/data" # <<< ADJUST LOCAL PATH
|
||||
|
||||
caddy:
|
||||
restart: unless-stopped
|
||||
image: abiosoft/caddy:latest
|
||||
depends_on:
|
||||
- ddns
|
||||
environment:
|
||||
DDNS_FRONTEND_HOST: ddns:8080
|
||||
DDNS_CADDY_DOMAIN: ddns.example.net # <<< ADJUST DOMAIN
|
||||
DDNS_CADDY_TLS_EMAIL: changeme@example.net # <<< INSERT EMAIL
|
||||
volumes:
|
||||
- "${PWD}/caddy/Caddyfile:/etc/Caddyfile"
|
||||
- "/root/ddns-caddy:/root/.caddy" # <<< ADJUST LOCAL PATH
|
||||
ports:
|
||||
- "80:80"
|
||||
- "443:443"
|
||||
|
|
@ -0,0 +1,28 @@
|
|||
version: '2'
|
||||
|
||||
services:
|
||||
ddns:
|
||||
restart: unless-stopped
|
||||
build:
|
||||
context: ..
|
||||
dockerfile: docker/ddns/Dockerfile
|
||||
depends_on:
|
||||
- redis
|
||||
environment:
|
||||
DDNS_DOMAIN: d.example.net
|
||||
DDNS_SOA_DOMAIN: ns.example.net
|
||||
DDNS_REDIS_HOST: redis:6379
|
||||
|
||||
powerdns:
|
||||
restart: unless-stopped
|
||||
build:
|
||||
context: powerdns/
|
||||
dockerfile: Dockerfile
|
||||
depends_on:
|
||||
- ddns
|
||||
environment:
|
||||
PDNS_REMOTE_HTTP_HOST: "ddns:8053"
|
||||
|
||||
redis:
|
||||
restart: unless-stopped
|
||||
image: redis:4-alpine
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
FROM buildpack-deps:jessie-scm
|
||||
|
||||
# the setup procedure according to https://repo.powerdns.com/ (Debian 8 Jessie)
|
||||
RUN echo "deb http://repo.powerdns.com/debian jessie-auth-41 main" > /etc/apt/sources.list.d/pdns.list \
|
||||
&& echo "Package: pdns-*\nPin: origin repo.powerdns.com\nPin-Priority: 600\n" >> /etc/apt/preferences.d/pdns \
|
||||
&& curl https://repo.powerdns.com/FD380FBB-pub.asc | apt-key add - \
|
||||
&& apt-get -y update \
|
||||
&& apt-get install -y pdns-server pdns-backend-remote \
|
||||
&& rm -rf /var/lib/apt/lists/*
|
||||
|
||||
COPY pdns.conf /etc/powerdns/pdns.conf
|
||||
|
||||
COPY entrypoint.sh /
|
||||
RUN chmod +x /entrypoint.sh
|
||||
ENTRYPOINT ["/entrypoint.sh"]
|
||||
|
||||
EXPOSE 53
|
||||
|
||||
CMD ["pdns_server", "--daemon=no"]
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
#!/usr/bin/env bash
|
||||
|
||||
CONFIG_FILE=/etc/powerdns/pdns.conf
|
||||
|
||||
sed -i 's/{{PDNS_REMOTE_HTTP_HOST}}/'"${PDNS_REMOTE_HTTP_HOST}"'/g' ${CONFIG_FILE}
|
||||
|
||||
exec "$@"
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
disable-tcp=yes
|
||||
cache-ttl=0
|
||||
loglevel=7
|
||||
log-dns-details=yes
|
||||
disable-axfr=yes
|
||||
|
||||
launch=remote
|
||||
remote-dnssec=no
|
||||
remote-connection-string=http:url=http://{{PDNS_REMOTE_HTTP_HOST}}/dnsapi
|
||||
|
|
@ -1,49 +1,79 @@
|
|||
package main
|
||||
package frontend
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"github.com/gin-gonic/gin"
|
||||
"github.com/pboehm/ddns/shared"
|
||||
"gopkg.in/gin-gonic/gin.v1"
|
||||
"html/template"
|
||||
"log"
|
||||
"net"
|
||||
"net/http"
|
||||
"regexp"
|
||||
)
|
||||
|
||||
func RunWebService(conn *RedisConnection) {
|
||||
r := gin.Default()
|
||||
r.SetHTMLTemplate(BuildTemplate())
|
||||
type Frontend struct {
|
||||
config *shared.Config
|
||||
hosts shared.HostBackend
|
||||
}
|
||||
|
||||
func NewFrontend(config *shared.Config, hosts shared.HostBackend) *Frontend {
|
||||
return &Frontend{
|
||||
config: config,
|
||||
hosts: hosts,
|
||||
}
|
||||
}
|
||||
|
||||
func (f *Frontend) Run() error {
|
||||
r := gin.New()
|
||||
r.Use(gin.Recovery())
|
||||
|
||||
if f.config.Verbose {
|
||||
r.Use(gin.Logger())
|
||||
}
|
||||
|
||||
r.SetHTMLTemplate(buildTemplate())
|
||||
|
||||
r.GET("/", func(g *gin.Context) {
|
||||
g.HTML(200, "index.html", gin.H{"domain": DdnsDomain})
|
||||
g.HTML(200, "index.html", gin.H{"domain": f.config.Domain})
|
||||
})
|
||||
|
||||
r.GET("/available/:hostname", func(c *gin.Context) {
|
||||
hostname, valid := ValidHostname(c.Params.ByName("hostname"))
|
||||
hostname, valid := isValidHostname(c.Params.ByName("hostname"))
|
||||
|
||||
if valid {
|
||||
_, err := f.hosts.GetHost(hostname)
|
||||
valid = err != nil
|
||||
}
|
||||
|
||||
c.JSON(200, gin.H{
|
||||
"available": valid && !conn.HostExist(hostname),
|
||||
"available": valid,
|
||||
})
|
||||
})
|
||||
|
||||
r.GET("/new/:hostname", func(c *gin.Context) {
|
||||
hostname, valid := ValidHostname(c.Params.ByName("hostname"))
|
||||
hostname, valid := isValidHostname(c.Params.ByName("hostname"))
|
||||
|
||||
if !valid {
|
||||
c.JSON(404, gin.H{"error": "This hostname is not valid"})
|
||||
return
|
||||
}
|
||||
|
||||
if conn.HostExist(hostname) {
|
||||
var err error
|
||||
|
||||
if h, err := f.hosts.GetHost(hostname); err == nil {
|
||||
c.JSON(403, gin.H{
|
||||
"error": "This hostname has already been registered.",
|
||||
"error": fmt.Sprintf("This hostname has already been registered. %v", h),
|
||||
})
|
||||
return
|
||||
}
|
||||
|
||||
host := &Host{Hostname: hostname, Ip: "127.0.0.1"}
|
||||
host := &shared.Host{Hostname: hostname, Ip: "127.0.0.1"}
|
||||
host.GenerateAndSetToken()
|
||||
|
||||
conn.SaveHost(host)
|
||||
if err = f.hosts.SetHost(host); err != nil {
|
||||
c.JSON(400, gin.H{"error": "Could not register host."})
|
||||
return
|
||||
}
|
||||
|
||||
c.JSON(200, gin.H{
|
||||
"hostname": host.Hostname,
|
||||
|
|
@ -53,7 +83,7 @@ func RunWebService(conn *RedisConnection) {
|
|||
})
|
||||
|
||||
r.GET("/update/:hostname/:token", func(c *gin.Context) {
|
||||
hostname, valid := ValidHostname(c.Params.ByName("hostname"))
|
||||
hostname, valid := isValidHostname(c.Params.ByName("hostname"))
|
||||
token := c.Params.ByName("token")
|
||||
|
||||
if !valid {
|
||||
|
|
@ -61,15 +91,14 @@ func RunWebService(conn *RedisConnection) {
|
|||
return
|
||||
}
|
||||
|
||||
if !conn.HostExist(hostname) {
|
||||
host, err := f.hosts.GetHost(hostname)
|
||||
if err != nil {
|
||||
c.JSON(404, gin.H{
|
||||
"error": "This hostname has not been registered or is expired.",
|
||||
})
|
||||
return
|
||||
}
|
||||
|
||||
host := conn.GetHost(hostname)
|
||||
|
||||
if host.Token != token {
|
||||
c.JSON(403, gin.H{
|
||||
"error": "You have supplied the wrong token to manipulate this host",
|
||||
|
|
@ -77,7 +106,7 @@ func RunWebService(conn *RedisConnection) {
|
|||
return
|
||||
}
|
||||
|
||||
ip, err := GetRemoteAddr(c.Request)
|
||||
ip, err := extractRemoteAddr(c.Request)
|
||||
if err != nil {
|
||||
c.JSON(400, gin.H{
|
||||
"error": "Your sender IP address is not in the right format",
|
||||
|
|
@ -86,7 +115,11 @@ func RunWebService(conn *RedisConnection) {
|
|||
}
|
||||
|
||||
host.Ip = ip
|
||||
conn.SaveHost(host)
|
||||
if err = f.hosts.SetHost(host); err != nil {
|
||||
c.JSON(400, gin.H{
|
||||
"error": "Could not update registered IP address",
|
||||
})
|
||||
}
|
||||
|
||||
c.JSON(200, gin.H{
|
||||
"current_ip": ip,
|
||||
|
|
@ -94,13 +127,13 @@ func RunWebService(conn *RedisConnection) {
|
|||
})
|
||||
})
|
||||
|
||||
r.Run(DdnsWebListenSocket)
|
||||
return r.Run(f.config.ListenFrontend)
|
||||
}
|
||||
|
||||
// Get the Remote Address of the client. At First we try to get the
|
||||
// X-Forwarded-For Header which holds the IP if we are behind a proxy,
|
||||
// otherwise the RemoteAddr is used
|
||||
func GetRemoteAddr(req *http.Request) (string, error) {
|
||||
func extractRemoteAddr(req *http.Request) (string, error) {
|
||||
header_data, ok := req.Header["X-Forwarded-For"]
|
||||
|
||||
if ok {
|
||||
|
|
@ -112,14 +145,16 @@ func GetRemoteAddr(req *http.Request) (string, error) {
|
|||
}
|
||||
|
||||
// Get index template from bindata
|
||||
func BuildTemplate() *template.Template {
|
||||
func buildTemplate() *template.Template {
|
||||
html, err := template.New("index.html").Parse(indexTemplate)
|
||||
HandleErr(err)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
return html
|
||||
}
|
||||
|
||||
func ValidHostname(host string) (string, bool) {
|
||||
func isValidHostname(host string) (string, bool) {
|
||||
valid, _ := regexp.Match("^[a-z0-9]{1,32}$", []byte(host))
|
||||
|
||||
return host, valid
|
||||
|
|
@ -1,4 +1,4 @@
|
|||
package main
|
||||
package frontend
|
||||
|
||||
const indexTemplate string = `
|
||||
<!DOCTYPE html>
|
||||
|
|
@ -168,7 +168,7 @@ const indexTemplate string = `
|
|||
function validate() {
|
||||
var hostname = $('#hostname').val();
|
||||
|
||||
$.getJSON("/available/" + hostname + "/", function( data ) {
|
||||
$.getJSON("/available/" + hostname, function( data ) {
|
||||
if (data.available) {
|
||||
isValid();
|
||||
} else {
|
||||
|
|
@ -188,7 +188,7 @@ const indexTemplate string = `
|
|||
$('#register').click(function() {
|
||||
var hostname = $("#hostname").val();
|
||||
|
||||
$.getJSON("/new/" + hostname + "/", function( data ) {
|
||||
$.getJSON("/new/" + hostname, function( data ) {
|
||||
console.log(data);
|
||||
|
||||
var host = location.protocol + '//' + location.host;
|
||||
100
redis.go
100
redis.go
|
|
@ -1,100 +0,0 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"crypto/sha1"
|
||||
"fmt"
|
||||
"github.com/garyburd/redigo/redis"
|
||||
"strings"
|
||||
"time"
|
||||
)
|
||||
|
||||
const HostExpirationSeconds int = 10 * 24 * 60 * 60 // 10 Days
|
||||
|
||||
type RedisConnection struct {
|
||||
*redis.Pool
|
||||
}
|
||||
|
||||
func OpenConnection(server string) *RedisConnection {
|
||||
return &RedisConnection{newPool(server)}
|
||||
}
|
||||
|
||||
func newPool(server string) *redis.Pool {
|
||||
return &redis.Pool{
|
||||
MaxIdle: 3,
|
||||
|
||||
IdleTimeout: 240 * time.Second,
|
||||
|
||||
Dial: func() (redis.Conn, error) {
|
||||
c, err := redis.Dial("tcp", server)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return c, err
|
||||
},
|
||||
|
||||
TestOnBorrow: func(c redis.Conn, t time.Time) error {
|
||||
_, err := c.Do("PING")
|
||||
return err
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func (self *RedisConnection) GetHost(name string) *Host {
|
||||
conn := self.Get()
|
||||
defer conn.Close()
|
||||
|
||||
host := Host{Hostname: name}
|
||||
|
||||
if self.HostExist(name) {
|
||||
data, err := redis.Values(conn.Do("HGETALL", host.Hostname))
|
||||
HandleErr(err)
|
||||
|
||||
HandleErr(redis.ScanStruct(data, &host))
|
||||
}
|
||||
|
||||
return &host
|
||||
}
|
||||
|
||||
func (self *RedisConnection) SaveHost(host *Host) {
|
||||
conn := self.Get()
|
||||
defer conn.Close()
|
||||
|
||||
_, err := conn.Do("HMSET", redis.Args{}.Add(host.Hostname).AddFlat(host)...)
|
||||
HandleErr(err)
|
||||
|
||||
_, err = conn.Do("EXPIRE", host.Hostname, HostExpirationSeconds)
|
||||
HandleErr(err)
|
||||
}
|
||||
|
||||
func (self *RedisConnection) HostExist(name string) bool {
|
||||
conn := self.Get()
|
||||
defer conn.Close()
|
||||
|
||||
exists, err := redis.Bool(conn.Do("EXISTS", name))
|
||||
HandleErr(err)
|
||||
|
||||
return exists
|
||||
}
|
||||
|
||||
type Host struct {
|
||||
Hostname string `redis:"-"`
|
||||
Ip string `redis:"ip"`
|
||||
Token string `redis:"token"`
|
||||
}
|
||||
|
||||
func (self *Host) GenerateAndSetToken() {
|
||||
hash := sha1.New()
|
||||
hash.Write([]byte(fmt.Sprintf("%d", time.Now().UnixNano())))
|
||||
hash.Write([]byte(self.Hostname))
|
||||
|
||||
self.Token = fmt.Sprintf("%x", hash.Sum(nil))
|
||||
}
|
||||
|
||||
// Returns true when this host has a IPv4 Address and false if IPv6
|
||||
func (self *Host) IsIPv4() bool {
|
||||
if strings.Contains(self.Ip, ".") {
|
||||
return true
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
|
@ -0,0 +1,55 @@
|
|||
package shared
|
||||
|
||||
import (
|
||||
"flag"
|
||||
"log"
|
||||
"strings"
|
||||
)
|
||||
|
||||
type Config struct {
|
||||
Verbose bool
|
||||
Domain string
|
||||
SOAFqdn string
|
||||
HostExpirationDays int
|
||||
ListenFrontend string
|
||||
ListenBackend string
|
||||
RedisHost string
|
||||
}
|
||||
|
||||
func (c *Config) Initialize() {
|
||||
flag.StringVar(&c.Domain, "domain", "",
|
||||
"The subdomain which should be handled by DDNS")
|
||||
|
||||
flag.StringVar(&c.SOAFqdn, "soa_fqdn", "",
|
||||
"The FQDN of the DNS server which is returned as a SOA record")
|
||||
|
||||
flag.StringVar(&c.ListenBackend, "listen-backend", ":8053",
|
||||
"Which socket should the backend web service use to bind itself")
|
||||
|
||||
flag.StringVar(&c.ListenFrontend, "listen-frontend", ":8080",
|
||||
"Which socket should the frontend web service use to bind itself")
|
||||
|
||||
flag.StringVar(&c.RedisHost, "redis", ":6379",
|
||||
"The Redis socket that should be used")
|
||||
|
||||
flag.IntVar(&c.HostExpirationDays, "expiration-days", 10,
|
||||
"The number of days after a host is released when it is not updated")
|
||||
|
||||
flag.BoolVar(&c.Verbose, "verbose", false,
|
||||
"Be more verbose")
|
||||
}
|
||||
|
||||
func (c *Config) Validate() {
|
||||
flag.Parse()
|
||||
|
||||
if c.Domain == "" {
|
||||
log.Fatal("You have to supply the domain via --domain=DOMAIN")
|
||||
} else if !strings.HasPrefix(c.Domain, ".") {
|
||||
// get the domain in the right format
|
||||
c.Domain = "." + c.Domain
|
||||
}
|
||||
|
||||
if c.SOAFqdn == "" {
|
||||
log.Fatal("You have to supply the server FQDN via --soa_fqdn=FQDN")
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,36 @@
|
|||
package shared
|
||||
|
||||
import (
|
||||
"crypto/sha1"
|
||||
"fmt"
|
||||
"strings"
|
||||
"time"
|
||||
)
|
||||
|
||||
type Host struct {
|
||||
Hostname string `redis:"-"`
|
||||
Ip string `redis:"ip"`
|
||||
Token string `redis:"token"`
|
||||
}
|
||||
|
||||
func (h *Host) GenerateAndSetToken() {
|
||||
hash := sha1.New()
|
||||
hash.Write([]byte(fmt.Sprintf("%d", time.Now().UnixNano())))
|
||||
hash.Write([]byte(h.Hostname))
|
||||
|
||||
h.Token = fmt.Sprintf("%x", hash.Sum(nil))
|
||||
}
|
||||
|
||||
func (h *Host) IsIPv4() bool {
|
||||
if strings.Contains(h.Ip, ".") {
|
||||
return true
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
type HostBackend interface {
|
||||
GetHost(string) (*Host, error)
|
||||
|
||||
SetHost(*Host) error
|
||||
}
|
||||
|
|
@ -0,0 +1,80 @@
|
|||
package shared
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"github.com/garyburd/redigo/redis"
|
||||
"time"
|
||||
)
|
||||
|
||||
type RedisBackend struct {
|
||||
expirationSeconds int
|
||||
pool *redis.Pool
|
||||
}
|
||||
|
||||
func NewRedisBackend(config *Config) *RedisBackend {
|
||||
return &RedisBackend{
|
||||
expirationSeconds: config.HostExpirationDays * 24 * 60 * 60,
|
||||
pool: &redis.Pool{
|
||||
MaxIdle: 3,
|
||||
IdleTimeout: 240 * time.Second,
|
||||
|
||||
Dial: func() (redis.Conn, error) {
|
||||
c, err := redis.Dial("tcp", config.RedisHost)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return c, err
|
||||
},
|
||||
|
||||
TestOnBorrow: func(c redis.Conn, t time.Time) error {
|
||||
_, err := c.Do("PING")
|
||||
return err
|
||||
},
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func (r *RedisBackend) Close() {
|
||||
r.pool.Close()
|
||||
}
|
||||
|
||||
func (r *RedisBackend) GetHost(name string) (*Host, error) {
|
||||
conn := r.pool.Get()
|
||||
defer conn.Close()
|
||||
|
||||
host := Host{Hostname: name}
|
||||
|
||||
var err error
|
||||
var data []interface{}
|
||||
|
||||
if data, err = redis.Values(conn.Do("HGETALL", host.Hostname)); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if len(data) == 0 {
|
||||
return nil, errors.New("Host does not exist")
|
||||
}
|
||||
|
||||
if err = redis.ScanStruct(data, &host); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &host, nil
|
||||
}
|
||||
|
||||
func (r *RedisBackend) SetHost(host *Host) error {
|
||||
conn := r.pool.Get()
|
||||
defer conn.Close()
|
||||
|
||||
var err error
|
||||
|
||||
if _, err = conn.Do("HMSET", redis.Args{}.Add(host.Hostname).AddFlat(host)...); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if _, err = conn.Do("EXPIRE", host.Hostname, r.expirationSeconds); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
Loading…
Reference in New Issue