2018-08-27 16:29:09 +02:00
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#!/bin/sh
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# Purpose {{{
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## Create a temp file (to monitor) if an upgrade is available for rocket.chat
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## image on the Docker Hub.
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2018-08-28 11:20:33 +02:00
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## Download the new version of the image.
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2018-08-27 16:29:09 +02:00
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## How-to use {{{
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### 1. Needs imagetags script, in the same directory
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### cf. https://git.ipr.univ-rennes1.fr/cellinfo/scripts/src/master/docker/imagetags
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# wget https://git.ipr.univ-rennes1.fr/cellinfo/scripts/raw/master/docker/imagetags
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### 2. Ensure to run with a user member of the docker group.
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### 3. Create a cron job, eg.
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#00 20 * * * root /opt/repos/ipr.scripts/docker/check.rocketchat.update
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### 4. Monitor the temp file.
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# Or enable MAILTO in cronjob and print a message in the script.
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# Or send a mail.
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# …
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## }}}
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# }}}
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# Vars {{{
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DEBUG=1
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script_wd=$(dirname "${0}")
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rkt_repo_name="rocketchat"
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rkt_image_name="rocket.chat"
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rkt_current_version=$(docker container ls | grep -- "${rkt_repo_name}/${rkt_image_name}" | sed -- "s/.*${rkt_repo_name}\/${rkt_image_name}:\([^ ]*\) .*/\1/")
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rkt_grep_pattern="[[:digit:]]\\.\\+[[:digit:]]*\\.\\?[[:digit:]]*$"
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rkt_new_version=$("${script_wd}"/imagetags "${rkt_repo_name}/${rkt_image_name}" "${rkt_grep_pattern}" | tail -n1)
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rkt_new_version_file="/tmp/.docker.rocket.chat.upgrade"
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# }}}
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# Check if a container already runs with the wanted image {{{
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if [ ! $(docker container ls | grep -q -- "${rkt_repo_name}${rkt_image_name}") ]; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test ${rkt_image_name} — Current version is ${rkt_current_version}."
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else
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test ${rkt_image_name} — No container runs with ${rkt_image_name} image on this host."
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2018-08-28 11:20:33 +02:00
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rm -f -- "${rkt_new_version_file}"
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2018-08-27 16:29:09 +02:00
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exit 1
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fi
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# }}}
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# Check if the current version is the last one {{{
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if [ "${rkt_current_version}" != "${rkt_new_version}" ]; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — An upgrade is available for ${rkt_image_name}: ${rkt_new_version}."
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# Create a temp file to monitor
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touch -- "${rkt_new_version_file}"
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2018-08-28 11:20:33 +02:00
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printf '\e[1;35m%-6s\e[m\n' "An upgrade is available for ${rkt_image_name}: ${rkt_new_version}." >> "${rkt_new_version_file}"
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docker pull "${rkt_repo_name}/${rkt_image_name}:${rkt_new_version}" > /dev/null
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2018-08-27 16:29:09 +02:00
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else
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — The current version is up-to-date."
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rm -f -- "${rkt_new_version_file}"
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fi
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# }}}
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exit 0
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