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Add docker api version parameter (#372)

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* Add docker api version parameter

* Note for minimum supported version

* Tests for EnvConfig
This commit is contained in:
Kaloyan Raev 2019-08-25 13:37:20 +03:00 • committed by Simon Aronsson
parent 7f7db72686
commit f820eb5b3a
4 changed files with 63 additions and 8 deletions
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14
internal/flags/flags.go
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@ -9,11 +9,16 @@ import (
"github.com/spf13/viper"
)
// DockerAPIMinVersion is the minimum version of the docker api required to
// use watchtower
const DockerAPIMinVersion string = "1.24"
// RegisterDockerFlags that are used directly by the docker api client
func RegisterDockerFlags(rootCmd *cobra.Command) {
flags := rootCmd.PersistentFlags()
flags.StringP("host", "H", viper.GetString("DOCKER_HOST"), "daemon socket to connect to")
flags.BoolP("tlsverify", "v", viper.GetBool("DOCKER_TLS_VERIFY"), "use TLS and verify the remote")
flags.StringP("api-version", "a", viper.GetString("DOCKER_API_VERSION"), "api version to use by docker client")
}
// RegisterSystemFlags that are used by watchtower to modify the program flow
@ -215,6 +220,7 @@ Should only be used for testing.
func SetDefaults() {
viper.AutomaticEnv()
viper.SetDefault("DOCKER_HOST", "unix:///var/run/docker.sock")
viper.SetDefault("DOCKER_API_VERSION", DockerAPIMinVersion)
viper.SetDefault("WATCHTOWER_POLL_INTERVAL", 300)
viper.SetDefault("WATCHTOWER_TIMEOUT", time.Second*10)
viper.SetDefault("WATCHTOWER_NOTIFICATIONS", []string{})
@ -225,10 +231,11 @@ func SetDefaults() {
// EnvConfig translates the command-line options into environment variables
// that will initialize the api client
func EnvConfig(cmd *cobra.Command, dockerAPIMinVersion string) error {
func EnvConfig(cmd *cobra.Command) error {
var err error
var host string
var tls bool
var version string
flags := cmd.PersistentFlags()
@ -238,13 +245,16 @@ func EnvConfig(cmd *cobra.Command, dockerAPIMinVersion string) error {
if tls, err = flags.GetBool("tlsverify"); err != nil {
return err
}
if version, err = flags.GetString("api-version"); err != nil {
return err
}
if err = setEnvOptStr("DOCKER_HOST", host); err != nil {
return err
}
if err = setEnvOptBool("DOCKER_TLS_VERIFY", tls); err != nil {
return err
}
if err = setEnvOptStr("DOCKER_API_VERSION", dockerAPIMinVersion); err != nil {
if err = setEnvOptStr("DOCKER_API_VERSION", version); err != nil {
return err
}
return nil