From 1b053874f9c103309c9c3e7191d61e3d386390df Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philipp=20B=C3=B6hm?= Date: Sat, 20 Feb 2021 20:50:42 +0100 Subject: [PATCH] update dependencies and also allow configuration via env variables --- ddns.go | 4 ++ go.mod | 20 +++++-- go.sum | 148 ++++++++++++++++++++++++++++++++++++++++------- shared/config.go | 28 +++++---- 4 files changed, 163 insertions(+), 37 deletions(-) diff --git a/ddns.go b/ddns.go index ea125a8..e4c28fd 100644 --- a/ddns.go +++ b/ddns.go @@ -17,6 +17,10 @@ func init() { func main() { serviceConfig.Validate() + if serviceConfig.Verbose { + log.Printf("Loaded config: %#v", serviceConfig) + } + redis := shared.NewRedisBackend(serviceConfig) defer redis.Close() diff --git a/go.mod b/go.mod index ccea42e..6724027 100644 --- a/go.mod +++ b/go.mod @@ -3,8 +3,20 @@ module github.com/pboehm/ddns go 1.12 require ( - github.com/garyburd/redigo v1.6.0 - github.com/gin-gonic/gin v1.4.0 - github.com/stretchr/testify v1.3.0 - golang.org/x/sync v0.0.0-20190423024810-112230192c58 + github.com/garyburd/redigo v1.6.2 + github.com/gin-gonic/gin v1.6.3 + github.com/go-playground/validator/v10 v10.4.1 // indirect + github.com/golang/protobuf v1.4.3 // indirect + github.com/jnovack/flag v1.15.0 + github.com/json-iterator/go v1.1.10 // indirect + github.com/leodido/go-urn v1.2.1 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.1 // indirect + github.com/stretchr/testify v1.6.1 + github.com/ugorji/go v1.2.4 // indirect + golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83 // indirect + golang.org/x/sync v0.0.0-20210220032951-036812b2e83c + golang.org/x/sys v0.0.0-20210220050731-9a76102bfb43 // indirect + google.golang.org/protobuf v1.25.0 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect ) diff --git a/go.sum b/go.sum index 53e82f1..e58dfa3 100644 --- a/go.sum +++ b/go.sum @@ -1,42 +1,146 @@ +cloud.google.com/go v0.26.0/go.mod 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h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY= +gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/shared/config.go b/shared/config.go index 807e7f7..97269c0 100644 --- a/shared/config.go +++ b/shared/config.go @@ -1,8 +1,9 @@ package shared import ( - "flag" + "github.com/jnovack/flag" "log" + "os" "strings" ) @@ -14,42 +15,47 @@ type Config struct { ListenFrontend string ListenBackend string RedisHost string + + fs *flag.FlagSet } func (c *Config) Initialize() { - flag.StringVar(&c.Domain, "domain", "", + fs := flag.NewFlagSetWithEnvPrefix(os.Args[0], "DDNS", 0) + fs.StringVar(&c.Domain, "domain", "", "The subdomain which should be handled by DDNS") - flag.StringVar(&c.SOAFqdn, "soa_fqdn", "", + fs.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", + fs.StringVar(&c.ListenBackend, "listen-backend", ":8053", "Which socket should the backend web service use to bind itself") - flag.StringVar(&c.ListenFrontend, "listen-frontend", ":8080", + fs.StringVar(&c.ListenFrontend, "listen-frontend", ":8080", "Which socket should the frontend web service use to bind itself") - flag.StringVar(&c.RedisHost, "redis", ":6379", + fs.StringVar(&c.RedisHost, "redis-host", ":6379", "The Redis socket that should be used") - flag.IntVar(&c.HostExpirationDays, "expiration-days", 10, + fs.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, + fs.BoolVar(&c.Verbose, "verbose", false, "Be more verbose") + + c.fs = fs } func (c *Config) Validate() { - flag.Parse() + c.fs.Parse(os.Args[1:]) if c.Domain == "" { - log.Fatal("You have to supply the domain via --domain=DOMAIN") + log.Fatal("You have to supply the domain via env variable DDNS_DOMAIN or command line flag --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") + log.Fatal("You have to supply the server FQDN via env variable DDNS_SOA_FQDN or command line flag --soa_fqdn=FQDN") } }