82 lines
2.7 KiB
Bash
Executable File
82 lines
2.7 KiB
Bash
Executable File
#!/bin/bash
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#
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# https://containrrr.dev/watchtower/
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# https://hub.docker.com/r/containrrr/watchtower
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# https://github.com/containrrr/watchtower
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#
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# Email notification settings below assume the gateway acting
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# as a smarthost and Docker version v20.10+ is required.
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image="containrrr/watchtower:latest"
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instance="watchtower"
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networks=""
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outfile=""
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volume=""
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MSG_MISSINGDEP="Fatal: missing dependency"
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# Checks the dependencies.
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TR=$(which tr 2>/dev/null)
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if [ -z "$TR" ]; then echo "$MSG_MISSINGDEP tr."; exit 1 ; fi
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for item in cat dirname docker hostname
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do
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if [ -n "$(which $item)" ]
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then export $(echo $item | "$TR" '[:lower:]' '[:upper:]')=$(which $item)
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else echo "$MSG_MISSINGDEP $item." >&2; exit 1; fi
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done
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# Stops and removes the container (if necessary).
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if [ -n "$("$DOCKER" ps -q -f name=$instance)" ]
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then "$DOCKER" stop "$instance"; fi
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if [ -n "$("$DOCKER" ps -a -q -f name=$instance)" ]
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then "$DOCKER" rm "$instance"; fi
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# Checks for an upgrade.
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$DOCKER pull "$image"
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# Creates the container.
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$DOCKER create \
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-e TZ=$("$CAT" "/etc/timezone") \
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-e WATCHTOWER_CLEANUP=true \
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-e WATCHTOWER_DEBUG=false \
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-e WATCHTOWER_INCLUDE_STOPPED=true \
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-e WATCHTOWER_LABEL_ENABLE=true \
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-e WATCHTOWER_MONITOR_ONLY=true \
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-e WATCHTOWER_REVIVE_STOPPED=false \
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-e WATCHTOWER_NO_PULL=false \
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-e WATCHTOWER_SCHEDULE="0 0 1 * * *" \
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-e WATCHTOWER_WARN_ON_HEAD_FAILURE="never" \
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-e WATCHTOWER_NOTIFICATIONS=email \
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-e WATCHTOWER_NOTIFICATION_EMAIL_FROM="$USER@$(hostname -f)" \
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-e WATCHTOWER_NOTIFICATION_EMAIL_TO="$USER@$(hostname)" \
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-e WATCHTOWER_NOTIFICATION_EMAIL_SERVER="host.docker.internal" \
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-e WATCHTOWER_NOTIFICATION_EMAIL_SERVER_PORT=25 \
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-e WATCHTOWER_NOTIFICATION_EMAIL_SERVER_TLS_SKIP_VERIFY=true \
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-e WATCHTOWER_NOTIFICATION_EMAIL_DELAY=15 \
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-e WATCHTOWER_NOTIFICATION_EMAIL_SUBJECTTAG="[Watchtower $("$HOSTNAME")]" \
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-v /var/run/docker.sock:/var/run/docker.sock \
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--add-host="host.docker.internal:host-gateway" \
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--restart unless-stopped \
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--label "com.centurylinklabs.watchtower.enable=true" \
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--name $instance $image
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# Connects it to the network(s).
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if [ -n "$networks" ]; then
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for network in $networks
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do
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# Checks the network, creates it if necessary.
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if [ -z "$("$DOCKER" network ls -q -f name=$network)" ]
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then "$DOCKER" network create -d bridge "$network"; fi
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# Then connects.
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$DOCKER network connect $network $instance
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done
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fi
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# Finally launches it.
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$DOCKER start $instance
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if [ -n "$outfile" -a -w "$("$DIRNAME" "$outfile")" ]; then
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# Sets a background process to collect the image's output.
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# This process will automatically terminate when the image stops.
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"$DOCKER" logs -f $instance >>"$outfile" 2>&1 &
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fi
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