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feat: allow hostname override for notifiers (#994)

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* feat: allow hostname override for email notifier

As it currently stands all notifiers utilise `os.Hostname` to populate their titles/subjects.

When utilising Docker with a bridged network if you set the hostname for a container to an external DNS hostname Docker's internal DNS resolver will override said hostname for all containers within the bridged network.

This change allows a user to specify what hostname should be represented in the email notifications without having to change the `os.Hostname`.

* feat: allow custom hostname for all notifiers

* docs: adjust notification hostname flag
This commit is contained in:
Amir Zarrinkafsh 2021-06-24 08:29:20 +10:00 • committed by GitHub
parent f508c92ae0
commit dc12a1ac7f
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9 changed files with 45 additions and 20 deletions
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6
internal/flags/flags.go
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@ -185,6 +185,12 @@ func RegisterNotificationFlags(rootCmd *cobra.Command) {
viper.GetString("WATCHTOWER_NOTIFICATIONS_LEVEL"),
"The log level used for sending notifications. Possible values: panic, fatal, error, warn, info or debug")
flags.StringP(
"notifications-hostname",
"",
viper.GetString("WATCHTOWER_NOTIFICATIONS_HOSTNAME"),
"Custom hostname for notification titles")
flags.StringP(
"notification-email-from",
"",