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#!/bin/bash |
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#!- |
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. /etc/shlib |
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#!- |
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DOCKER_UPDATE_PATH=${DOCKER_UPDATE_PATH:-/srv/docker-updates} |
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include common |
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include pretty |
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usage="$exname COMPONENT MASTER_IMAGE_NAME BRANCH UPDATED_IMAGE_NAME" |
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COMPONENT_NAME="$1" |
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MASTER_IMAGE_NAME="$2" |
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BRANCH="$3" |
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UPDATED_IMAGE_NAME="$4" |
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## Note: we will need in the DOCKER_UPDATE_HOST: |
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## - git-sub |
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## should we check for aufs ? |
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mkdir -p "$DOCKER_UPDATE_PATH" |
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cd "$DOCKER_UPDATE_PATH" |
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if ! [ -d "$COMPONENT_NAME" ]; then |
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echo "ERROR: repository $DOCKER_UPDATE_PATH//$COMPONENT_NAME is not existent." |
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echo "You should build it on this host prior to run this hook." |
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echo "As a remainder: this host is supposed to keep the reference git that" |
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echo "was used to built the master image." |
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exit 1 |
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fi |
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if [ -e "$COMPONENT_NAME.locked" ]; then |
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echo "Master is being updated." |
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echo "Or '$COMPONENT_NAME.locked' file was left dangling over." |
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exit 1 |
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fi |
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clean_all() { |
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cd / |
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mountpoint "$tmpdir_root" 2>/dev/null && umount "$tmpdir_root" |
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[ -d "$tmpdir_root" ] && rmdir "$tmpdir_root" |
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[ -d "$tmpdir_changes" ] && rm -rf "$tmpdir_changes" |
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} |
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tmpdir_changes=$(mktemp -d /tmp/$COMPONENT_NAME.changes.XXXXXX) |
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tmpdir_root=$(mktemp -d /tmp/$COMPONENT_NAME.root.XXXXXX) |
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trap "clean_all" EXIT |
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mount -t aufs -o br=$tmpdir_changes:$DOCKER_UPDATE_PATH/$COMPONENT_NAME -o udba=none none "$tmpdir_root" |
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cd "$tmpdir_root" |
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## XXXvlab: We probably would need to: |
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## - fetch only the module concerned |
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## - fetch only the ref concerned |
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git fetch origin "$BRANCH" |
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git checkout "$BRANCH" |
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git sub update |
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cd / && |
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umount "$tmpdir_root" && |
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rmdir "$tmpdir_root" |
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if [ "$?" != 0 ]; then |
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echo "Uh oh... could not umount aufs $tmpdir_root or delete it." |
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exit 1 |
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fi |
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cd "$tmpdir_changes" |
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echo "Cleaning the change layer." |
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find . -name .git -type d -exec rm -rf {} \; -prune |
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## XXXvlab: if we produced it we shouldn't have to pull it |
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echo "Pulling $MASTER_IMAGE_NAME" |
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docker pull "$MASTER_IMAGE_NAME" >/dev/null 2>&1 |
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container_id=$(docker run -d \ |
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-v $tmpdir_changes:/mnt/changes \ |
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"$MASTER_IMAGE_NAME" \ |
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/bin/bash -c " |
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mkdir -p /srv/app/{root,changes} |
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cp -a /mnt/changes /srv/app/changes/0000 |
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ls /srv/app/changes/0000 |
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") |
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if [ "$(docker wait "$container_id")" != "0" ]; then |
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echo "Copy of changes to docker images failed !" |
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echo "Log of container:" |
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docker logs $container_id |
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exit 1 |
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fi |
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docker commit --author "$exname" \ |
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--message "Automatic Updater" \ |
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"$container_id" \ |
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"$UPDATED_IMAGE_NAME" |
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docker push "$UPDATED_IMAGE_NAME" |