switch urfave to cobra
Simon Aronsson
6 years ago
parent
339df55cc6
commit
998e8052c5
@ -1,168 +0,0 @@
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package app
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import (
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"time"
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"github.com/urfave/cli"
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)
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// SetupCliFlags registers flags on the supplied urfave app
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func SetupCliFlags(app *cli.App) {
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app.Flags = []cli.Flag{
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cli.StringFlag{
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Name: "host, H",
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Usage: "daemon socket to connect to",
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Value: "unix:///var/run/docker.sock",
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EnvVar: "DOCKER_HOST",
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},
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cli.IntFlag{
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Name: "interval, i",
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Usage: "poll interval (in seconds)",
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Value: 300,
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EnvVar: "WATCHTOWER_POLL_INTERVAL",
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},
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cli.StringFlag{
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Name: "schedule, s",
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Usage: "the cron expression which defines when to update",
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EnvVar: "WATCHTOWER_SCHEDULE",
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},
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cli.BoolFlag{
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Name: "no-pull",
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Usage: "do not pull new images",
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EnvVar: "WATCHTOWER_NO_PULL",
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},
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cli.BoolFlag{
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Name: "no-restart",
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Usage: "do not restart containers",
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EnvVar: "WATCHTOWER_NO_RESTART",
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},
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cli.BoolFlag{
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Name: "cleanup",
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Usage: "remove old images after updating",
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EnvVar: "WATCHTOWER_CLEANUP",
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},
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cli.BoolFlag{
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Name: "tlsverify",
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Usage: "use TLS and verify the remote",
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EnvVar: "DOCKER_TLS_VERIFY",
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},
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cli.DurationFlag{
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Name: "stop-timeout",
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Usage: "timeout before container is forcefully stopped",
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Value: time.Second * 10,
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EnvVar: "WATCHTOWER_TIMEOUT",
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},
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cli.BoolFlag{
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Name: "label-enable",
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Usage: "watch containers where the com.centurylinklabs.watchtower.enable label is true",
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EnvVar: "WATCHTOWER_LABEL_ENABLE",
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},
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cli.BoolFlag{
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Name: "debug",
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Usage: "enable debug mode with verbose logging",
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},
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cli.StringSliceFlag{
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Name: "notifications",
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Value: &cli.StringSlice{},
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Usage: "notification types to send (valid: email, slack, msteams)",
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EnvVar: "WATCHTOWER_NOTIFICATIONS",
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},
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cli.StringFlag{
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Name: "notifications-level",
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Usage: "The log level used for sending notifications. Possible values: \"panic\", \"fatal\", \"error\", \"warn\", \"info\" or \"debug\"",
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EnvVar: "WATCHTOWER_NOTIFICATIONS_LEVEL",
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Value: "info",
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},
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cli.StringFlag{
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Name: "notification-email-from",
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Usage: "Address to send notification e-mails from",
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EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_FROM",
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},
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cli.StringFlag{
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Name: "notification-email-to",
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Usage: "Address to send notification e-mails to",
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EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_TO",
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},
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cli.StringFlag{
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Name: "notification-email-server",
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Usage: "SMTP server to send notification e-mails through",
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EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER",
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},
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cli.IntFlag{
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Name: "notification-email-server-port",
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Usage: "SMTP server port to send notification e-mails through",
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Value: 25,
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EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT",
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},
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cli.BoolFlag{
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Name: "notification-email-server-tls-skip-verify",
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Usage: "Controls whether watchtower verifies the SMTP server's certificate chain and host name. " +
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"If set, TLS accepts any certificate " +
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"presented by the server and any host name in that certificate. " +
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"In this mode, TLS is susceptible to man-in-the-middle attacks. " +
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"This should be used only for testing.",
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EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER_TLS_SKIP_VERIFY",
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},
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cli.StringFlag{
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Name: "notification-email-server-user",
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Usage: "SMTP server user for sending notifications",
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EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER",
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},
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cli.StringFlag{
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Name: "notification-email-server-password",
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Usage: "SMTP server password for sending notifications",
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EnvVar: "WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD",
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},
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cli.StringFlag{
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Name: "notification-slack-hook-url",
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Usage: "The Slack Hook URL to send notifications to",
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EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_HOOK_URL",
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},
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cli.StringFlag{
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Name: "notification-slack-identifier",
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Usage: "A string which will be used to identify the messages coming from this watchtower instance. Default if omitted is \"watchtower\"",
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EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER",
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Value: "watchtower",
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},
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cli.StringFlag{
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Name: "notification-slack-channel",
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Usage: "A string which overrides the webhook's default channel. Example: #my-custom-channel",
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EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_CHANNEL",
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},
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cli.StringFlag{
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Name: "notification-slack-icon-emoji",
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Usage: "An emoji code string to use in place of the default icon",
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EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_ICON_EMOJI",
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},
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cli.StringFlag{
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Name: "notification-slack-icon-url",
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Usage: "An icon image URL string to use in place of the default icon",
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EnvVar: "WATCHTOWER_NOTIFICATION_SLACK_ICON_URL",
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},
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cli.StringFlag{
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Name: "notification-msteams-hook",
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Usage: "The MSTeams WebHook URL to send notifications to",
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EnvVar: "WATCHTOWER_NOTIFICATION_MSTEAMS_HOOK_URL",
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},
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cli.BoolFlag{
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Name: "notification-msteams-data",
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Usage: "The MSTeams notifier will try to extract log entry fields as MSTeams message facts",
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EnvVar: "WATCHTOWER_NOTIFICATION_MSTEAMS_USE_LOG_DATA",
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},
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cli.BoolFlag{
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Name: "monitor-only",
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Usage: "Will only monitor for new images, not update the containers",
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EnvVar: "WATCHTOWER_MONITOR_ONLY",
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},
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cli.BoolFlag{
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Name: "run-once",
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Usage: "Run once now and exit",
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EnvVar: "WATCHTOWER_RUN_ONCE",
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},
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cli.BoolFlag{
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Name: "include-stopped",
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Usage: "Will also include created and exited containers",
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EnvVar: "WATCHTOWER_INCLUDE_STOPPED",
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},
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}
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}
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@ -0,0 +1,178 @@
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package cmd
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import (
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"fmt"
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"github.com/containrrr/watchtower/actions"
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"github.com/containrrr/watchtower/container"
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"github.com/containrrr/watchtower/internal/flags"
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"github.com/containrrr/watchtower/notifications"
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"github.com/robfig/cron"
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log "github.com/sirupsen/logrus"
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"os"
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"os/signal"
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"strconv"
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"syscall"
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"time"
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"github.com/spf13/cobra"
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)
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const DockerAPIMinVersion string = "1.24"
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var (
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client container.Client
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scheduleSpec string
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cleanup bool
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noRestart bool
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monitorOnly bool
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enableLabel bool
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notifier *notifications.Notifier
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timeout time.Duration
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)
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var rootCmd = &cobra.Command{
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Use: "watchtower",
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Short: "Automatically updates running Docker containers",
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Long: `
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Watchtower automatically updates running Docker containers whenever a new image is released.
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More information available at https://github.com/containrrr/watchtower/.
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`,
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Run: Run,
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PreRun: PreRun,
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}
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func init() {
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flags.SetDefaults()
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flags.RegisterDockerFlags(rootCmd)
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flags.RegisterSystemFlags(rootCmd)
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flags.RegisterNotificationFlags(rootCmd)
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}
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func Execute() {
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if err := rootCmd.Execute(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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func PreRun(cmd *cobra.Command, args []string) {
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f := cmd.PersistentFlags()
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if enabled, _ := f.GetBool("debug"); enabled == true {
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log.SetLevel(log.DebugLevel)
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}
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pollingSet := f.Changed("interval")
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cronSet := f.Changed("schedule")
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schedule, _ := f.GetString("schedule")
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cronLen := len(schedule)
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if pollingSet && cronSet && cronLen > 0 {
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log.Fatal("Only schedule or interval can be defined, not both.")
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} else if cronSet && cronLen > 0 {
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scheduleSpec, _ = f.GetString("schedule")
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} else {
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interval, _ := f.GetInt("interval")
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scheduleSpec = "@every " + strconv.Itoa(interval) + "s"
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}
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cleanup, noRestart, monitorOnly, timeout = flags.ReadFlags(cmd)
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if timeout < 0 {
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log.Fatal("Please specify a positive value for timeout value.")
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}
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enableLabel, _ = f.GetBool("label-enable")
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// configure environment vars for client
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err := flags.EnvConfig(cmd, DockerAPIMinVersion)
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if err != nil {
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log.Fatal(err)
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}
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noPull, _ := f.GetBool("no-pull")
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includeStopped, _ := f.GetBool("include-stopped")
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client = container.NewClient(
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!noPull,
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includeStopped,
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)
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notifier = notifications.NewNotifier(cmd)
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}
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func Run(c *cobra.Command, names []string) {
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filter := container.BuildFilter(names, enableLabel)
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runOnce, _ := c.PersistentFlags().GetBool("run-once")
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if runOnce {
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log.Info("Running a one time update.")
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runUpdatesWithNotifications(filter)
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os.Exit(1)
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return
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}
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if err := actions.CheckForMultipleWatchtowerInstances(client, cleanup); err != nil {
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log.Fatal(err)
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}
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runUpgradesOnSchedule(filter)
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os.Exit(1)
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}
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func runUpgradesOnSchedule(filter container.Filter) error {
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tryLockSem := make(chan bool, 1)
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tryLockSem <- true
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cron := cron.New()
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err := cron.AddFunc(
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scheduleSpec,
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func() {
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select {
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case v := <-tryLockSem:
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defer func() { tryLockSem <- v }()
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runUpdatesWithNotifications(filter)
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default:
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log.Debug("Skipped another update already running.")
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}
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nextRuns := cron.Entries()
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if len(nextRuns) > 0 {
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log.Debug("Scheduled next run: " + nextRuns[0].Next.String())
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}
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})
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if err != nil {
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return err
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}
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log.Debug("Starting Watchtower and scheduling first run: " + cron.Entries()[0].Schedule.Next(time.Now()).String())
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cron.Start()
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// Graceful shut-down on SIGINT/SIGTERM
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interrupt := make(chan os.Signal, 1)
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signal.Notify(interrupt, os.Interrupt)
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signal.Notify(interrupt, syscall.SIGTERM)
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<-interrupt
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cron.Stop()
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log.Info("Waiting for running update to be finished...")
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<-tryLockSem
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return nil
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}
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func runUpdatesWithNotifications(filter container.Filter) {
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notifier.StartNotification()
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updateParams := actions.UpdateParams{
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Filter: filter,
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Cleanup: cleanup,
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NoRestart: noRestart,
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Timeout: timeout,
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MonitorOnly: monitorOnly,
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}
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err := actions.Update(client, updateParams)
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if err != nil {
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log.Println(err)
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}
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notifier.SendNotification()
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}
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@ -0,0 +1,269 @@
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package flags
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import (
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log "github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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"os"
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"time"
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)
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func RegisterDockerFlags(rootCmd *cobra.Command) {
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flags := rootCmd.PersistentFlags()
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flags.StringP("host", "H", viper.GetString("DOCKER_HOST"), "daemon socket to connect to")
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flags.BoolP("tlsverify", "v", viper.GetBool("DOCKER_TLS_VERIFY"), "use TLS and verify the remote")
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}
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func RegisterSystemFlags(rootCmd *cobra.Command) {
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flags := rootCmd.PersistentFlags()
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flags.IntP(
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"interval",
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"i",
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viper.GetInt("WATCHTOWER_POLL_INTERVAL"),
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"poll interval (in seconds)")
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flags.StringP("schedule",
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"s",
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viper.GetString("WATCHTOWER_SCHEDULE"),
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"the cron expression which defines when to update")
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flags.DurationP("stop-timeout",
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"t",
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viper.GetDuration("WATCHTOWER_TIMEOUT"),
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"timeout before a container is forcefully stopped")
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flags.BoolP(
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"no-pull",
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"",
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viper.GetBool("WATCHTOWER_NO_PULL"),
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"do not pull any new images")
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flags.BoolP(
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"no-restart",
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"",
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viper.GetBool("WATCHTOWER_NO_RESTART"),
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"do not restart any containers")
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flags.BoolP(
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"cleanup",
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"c",
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viper.GetBool("WATCHTOWER_CLEANUP"),
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"remove previously used images after updating")
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flags.BoolP(
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"label-enable",
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"e",
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viper.GetBool("WATCHTOWER_LABEL_ENABLE"),
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"watch containers where the com.centurylinklabs.watchtower.enable label is true")
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flags.BoolP(
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"debug",
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"d",
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viper.GetBool("WATCHTOWER_DEBUG"),
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"enable debug mode with verbose logging")
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flags.BoolP(
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"monitor-only",
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"m",
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viper.GetBool("WATCHTOWER_MONITOR_ONLY"),
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"Will only monitor for new images, not update the containers")
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flags.BoolP(
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"run-once",
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"R",
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viper.GetBool("WATCHTOWER_RUN_ONCE"),
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"Run once now and exit")
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flags.BoolP(
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"include-stopped",
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"S",
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viper.GetBool("WATCHTOWER_INCLUDE_STOPPED"),
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"Will also include created and exited containers")
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}
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func RegisterNotificationFlags(rootCmd *cobra.Command) {
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flags := rootCmd.PersistentFlags()
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flags.StringSliceP(
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"notifications",
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"n",
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viper.GetStringSlice("WATCHTOWER_NOTIFICATIONS"),
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" notification types to send (valid: email, slack, msteams")
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flags.StringP(
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"notifications-level",
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"",
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viper.GetString("WATCHTOWER_NOTIFICATIONS_LEVEL"),
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"The log level used for sending notifications. Possible values: panic, fatal, error, warn, info or debug")
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flags.StringP(
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"notification-email-from",
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"",
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viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_FROM"),
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"Address to send notification emails from")
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flags.StringP(
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"notification-email-to",
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"",
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viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_TO"),
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"Address to send notification emails to")
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flags.StringP(
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"notification-email-server",
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"",
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viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER"),
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"SMTP server to send notification emails through")
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flags.StringP(
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"notification-email-server-port",
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"",
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viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT"),
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"SMTP server port to send notification emails through")
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flags.BoolP(
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"notification-email-server-tls-skip-verify",
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"",
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viper.GetBool("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_TLS_SKIP_VERIFY"),
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`
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Controls whether watchtower verifies the SMTP server's certificate chain and host name.
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Should only be used for testing.
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`)
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flags.StringP(
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"notification-email-server-user",
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"",
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viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_USER"),
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"SMTP server user for sending notifications")
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flags.StringP(
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"notification-email-server-password",
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"",
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viper.GetString("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PASSWORD"),
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"SMTP server password for sending notifications")
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flags.StringP(
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"notification-slack-hook-url",
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"",
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viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_HOOK_URL"),
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"The Slack Hook URL to send notifications to")
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flags.StringP(
|
||||
"notification-slack-identifier",
|
||||
"",
|
||||
viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER"),
|
||||
"A string which will be used to identify the messages coming from this watchtower instance")
|
||||
|
||||
flags.StringP(
|
||||
"notification-slack-channel",
|
||||
"",
|
||||
viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_CHANNEL"),
|
||||
"A string which overrides the webhook's default channel. Example: #my-custom-channel")
|
||||
|
||||
flags.StringP(
|
||||
"notification-slack-icon-emoji",
|
||||
"",
|
||||
viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_ICON_EMOJI"),
|
||||
"An emoji code string to use in place of the default icon")
|
||||
|
||||
flags.StringP(
|
||||
"notification-slack-icon-url",
|
||||
"",
|
||||
viper.GetString("WATCHTOWER_NOTIFICATION_SLACK_ICON_URL"),
|
||||
"An icon image URL string to use in place of the default icon")
|
||||
|
||||
flags.StringP(
|
||||
"notification-msteams-hook",
|
||||
"",
|
||||
viper.GetString("WATCHTOWER_NOTIFICATION_MSTEAMS_HOOK_URL"),
|
||||
"The MSTeams WebHook URL to send notifications to")
|
||||
|
||||
flags.BoolP(
|
||||
"notification-msteams-data",
|
||||
"",
|
||||
viper.GetBool("WATCHTOWER_NOTIFICATION_MSTEAMS_USE_LOG_DATA"),
|
||||
"The MSTeams notifier will try to extract log entry fields as MSTeams message facts")
|
||||
}
|
||||
|
||||
func SetDefaults() {
|
||||
viper.AutomaticEnv()
|
||||
viper.SetDefault("DOCKER_HOST", "unix:///var/run/docker.sock")
|
||||
viper.SetDefault("WATCHTOWER_POLL_INTERVAL", 300)
|
||||
viper.SetDefault("WATCHTOWER_TIMEOUT", time.Second*10)
|
||||
viper.SetDefault("WATCHTOWER_NOTIFICATIONS", []string{})
|
||||
viper.SetDefault("WATCHTOWER_NOTIFICATIONS_LEVEL", "info")
|
||||
viper.SetDefault("WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT", 25)
|
||||
viper.SetDefault("WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER", "watchtower")
|
||||
}
|
||||
|
||||
// envConfig translates the command-line options into environment variables
|
||||
// that will initialize the api client
|
||||
func EnvConfig(cmd *cobra.Command, dockerAPIMinVersion string) error {
|
||||
var err error
|
||||
var host string
|
||||
var tls bool
|
||||
|
||||
flags := cmd.PersistentFlags()
|
||||
|
||||
if host, err = flags.GetString("host"); err != nil {
|
||||
return err
|
||||
}
|
||||
if tls, err = flags.GetBool("tlsverify"); 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 {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func ReadFlags(cmd *cobra.Command) (bool, bool, bool, time.Duration) {
|
||||
flags := cmd.PersistentFlags()
|
||||
|
||||
var err error
|
||||
var cleanup bool
|
||||
var noRestart bool
|
||||
var monitorOnly bool
|
||||
var timeout time.Duration
|
||||
|
||||
if cleanup, err = flags.GetBool("cleanup"); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
if noRestart, err = flags.GetBool("no-restart"); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
if monitorOnly, err = flags.GetBool("monitor-only"); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
if timeout, err = flags.GetDuration("stop-timeout"); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
return cleanup, noRestart, monitorOnly, timeout
|
||||
}
|
||||
|
||||
|
||||
func setEnvOptStr(env string, opt string) error {
|
||||
if opt == "" || opt == os.Getenv(env) {
|
||||
return nil
|
||||
}
|
||||
err := os.Setenv(env, opt)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func setEnvOptBool(env string, opt bool) error {
|
||||
if opt == true {
|
||||
return setEnvOptStr(env, "1")
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
@ -1,213 +1,21 @@
|
||||
package main // import "github.com/containrrr/watchtower"
|
||||
|
||||
import (
|
||||
"os"
|
||||
"os/signal"
|
||||
"syscall"
|
||||
"time"
|
||||
|
||||
"strconv"
|
||||
|
||||
"github.com/containrrr/watchtower/actions"
|
||||
cliApp "github.com/containrrr/watchtower/app"
|
||||
"github.com/containrrr/watchtower/container"
|
||||
"github.com/containrrr/watchtower/notifications"
|
||||
"github.com/robfig/cron"
|
||||
"github.com/containrrr/watchtower/cmd"
|
||||
log "github.com/sirupsen/logrus"
|
||||
"github.com/urfave/cli"
|
||||
)
|
||||
|
||||
// DockerAPIMinVersion is the version of the docker API, which is minimally required by
|
||||
// watchtower. Currently we require at least API 1.24 and therefore Docker 1.12 or later.
|
||||
const DockerAPIMinVersion string = "1.24"
|
||||
|
||||
var version = "master"
|
||||
var commit = "unknown"
|
||||
var date = "unknown"
|
||||
|
||||
var (
|
||||
client container.Client
|
||||
scheduleSpec string
|
||||
cleanup bool
|
||||
noRestart bool
|
||||
monitorOnly bool
|
||||
enableLabel bool
|
||||
notifier *notifications.Notifier
|
||||
timeout time.Duration
|
||||
)
|
||||
|
||||
func init() {
|
||||
log.SetLevel(log.InfoLevel)
|
||||
}
|
||||
|
||||
func main() {
|
||||
app := cli.NewApp()
|
||||
InitApp(app)
|
||||
cliApp.SetupCliFlags(app)
|
||||
|
||||
if err := app.Run(os.Args); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
|
||||
// InitApp initializes urfave app metadata and sets up entrypoints
|
||||
func InitApp(app *cli.App) {
|
||||
app.Name = "watchtower"
|
||||
app.Version = version + " - " + commit + " - " + date
|
||||
app.Usage = "Automatically update running Docker containers"
|
||||
app.Before = before
|
||||
app.Action = start
|
||||
}
|
||||
|
||||
func before(c *cli.Context) error {
|
||||
if c.GlobalBool("debug") {
|
||||
log.SetLevel(log.DebugLevel)
|
||||
}
|
||||
|
||||
pollingSet := c.IsSet("interval")
|
||||
cronSet := c.IsSet("schedule")
|
||||
cronLen := len(c.String("schedule"))
|
||||
|
||||
if pollingSet && cronSet && cronLen > 0 {
|
||||
log.Fatal("Only schedule or interval can be defined, not both.")
|
||||
} else if cronSet && cronLen > 0 {
|
||||
scheduleSpec = c.String("schedule")
|
||||
} else {
|
||||
scheduleSpec = "@every " + strconv.Itoa(c.Int("interval")) + "s"
|
||||
}
|
||||
|
||||
readFlags(c)
|
||||
|
||||
if timeout < 0 {
|
||||
log.Fatal("Please specify a positive value for timeout value.")
|
||||
}
|
||||
enableLabel = c.GlobalBool("label-enable")
|
||||
|
||||
// configure environment vars for client
|
||||
err := envConfig(c)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
client = container.NewClient(
|
||||
!c.GlobalBool("no-pull"),
|
||||
c.GlobalBool("include-stopped"),
|
||||
)
|
||||
notifier = notifications.NewNotifier(c)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func start(c *cli.Context) error {
|
||||
names := c.Args()
|
||||
filter := container.BuildFilter(names, enableLabel)
|
||||
|
||||
if c.GlobalBool("run-once") {
|
||||
log.Info("Running a one time update.")
|
||||
runUpdatesWithNotifications(filter)
|
||||
os.Exit(1)
|
||||
return nil
|
||||
}
|
||||
|
||||
if err := actions.CheckForMultipleWatchtowerInstances(client, cleanup); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
|
||||
runUpgradesOnSchedule(filter)
|
||||
os.Exit(1)
|
||||
return nil
|
||||
}
|
||||
|
||||
func runUpgradesOnSchedule(filter container.Filter) error {
|
||||
tryLockSem := make(chan bool, 1)
|
||||
tryLockSem <- true
|
||||
|
||||
cron := cron.New()
|
||||
err := cron.AddFunc(
|
||||
scheduleSpec,
|
||||
func() {
|
||||
select {
|
||||
case v := <-tryLockSem:
|
||||
defer func() { tryLockSem <- v }()
|
||||
runUpdatesWithNotifications(filter)
|
||||
default:
|
||||
log.Debug("Skipped another update already running.")
|
||||
}
|
||||
|
||||
nextRuns := cron.Entries()
|
||||
if len(nextRuns) > 0 {
|
||||
log.Debug("Scheduled next run: " + nextRuns[0].Next.String())
|
||||
}
|
||||
})
|
||||
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
log.Debug("Starting Watchtower and scheduling first run: " + cron.Entries()[0].Schedule.Next(time.Now()).String())
|
||||
cron.Start()
|
||||
|
||||
// Graceful shut-down on SIGINT/SIGTERM
|
||||
interrupt := make(chan os.Signal, 1)
|
||||
signal.Notify(interrupt, os.Interrupt)
|
||||
signal.Notify(interrupt, syscall.SIGTERM)
|
||||
|
||||
<-interrupt
|
||||
cron.Stop()
|
||||
log.Info("Waiting for running update to be finished...")
|
||||
<-tryLockSem
|
||||
return nil
|
||||
}
|
||||
|
||||
func runUpdatesWithNotifications(filter container.Filter) {
|
||||
notifier.StartNotification()
|
||||
updateParams := actions.UpdateParams{
|
||||
Filter: filter,
|
||||
Cleanup: cleanup,
|
||||
NoRestart: noRestart,
|
||||
Timeout: timeout,
|
||||
MonitorOnly: monitorOnly,
|
||||
}
|
||||
err := actions.Update(client, updateParams)
|
||||
if err != nil {
|
||||
log.Println(err)
|
||||
}
|
||||
notifier.SendNotification()
|
||||
}
|
||||
|
||||
func setEnvOptStr(env string, opt string) error {
|
||||
if opt == "" || opt == os.Getenv(env) {
|
||||
return nil
|
||||
}
|
||||
err := os.Setenv(env, opt)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func setEnvOptBool(env string, opt bool) error {
|
||||
if opt == true {
|
||||
return setEnvOptStr(env, "1")
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// envConfig translates the command-line options into environment variables
|
||||
// that will initialize the api client
|
||||
func envConfig(c *cli.Context) error {
|
||||
var err error
|
||||
|
||||
err = setEnvOptStr("DOCKER_HOST", c.GlobalString("host"))
|
||||
err = setEnvOptBool("DOCKER_TLS_VERIFY", c.GlobalBool("tlsverify"))
|
||||
err = setEnvOptStr("DOCKER_API_VERSION", DockerAPIMinVersion)
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
func readFlags(c *cli.Context) {
|
||||
cleanup = c.GlobalBool("cleanup")
|
||||
noRestart = c.GlobalBool("no-restart")
|
||||
monitorOnly = c.GlobalBool("monitor-only")
|
||||
timeout = c.GlobalDuration("stop-timeout")
|
||||
cmd.Execute()
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue