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#!/bin/bash
## When writing relation script, remember:
## - they should be idempotents
## - they can be launched while the dockers is already up
## - they are launched from the host
## - the target of the link is launched first, and get a chance to ``relation-set``
## - both side of the scripts get to use ``relation-get``.
. lib/common
set -e
## XXXvlab: should use container name here so that it could support
## multiple mysql
label=${SERVICE_NAME}-mysql-backup
DST=$CONFIGSTORE/$TARGET_SERVICE_NAME/etc/cron/$label
schedule=$(relation-get schedule)
if ! echo "$schedule" | egrep '^\s*(([0-9/,*-]+\s+){4,4}[0-9/,*-]+|@[a-z]+)\s*$' >/dev/null 2>&1; then
err "Unrecognized schedule '$schedule'."
exit 1
fi
## Warning: using '\' in heredoc will be removed in the final cron file, which
## is totally wanted: cron does not support multilines.
## Warning: 'docker -v' will use HOST directory even if launched from
## 'cron' container.
file_put "$DST" <<EOF
COMPOSE_LAUNCHER_OPTS=$COMPOSE_LAUNCHER_OPTS
$schedule root lock $label -D -p 10 -c "\
docker run --rm \
--network ${PROJECT_NAME}_default \
-v \"$LOCAL_DB_PASSFILE\":/root/.my.cnf \
-v \"$HOST_CHARM_STORE/${CHARM_REL_PATH#${CHARM_STORE}/}/resources/bin/mysql-backup:/usr/sbin/mysql-backup\" \
-v \"$SERVICE_DATASTORE/var/backups/mysql:/var/backups/mysql\" \
--entrypoint mysql-backup \
\"$DOCKER_BASE_IMAGE\" --host \"${SERVICE_IMAGE}\"" 2>&1 | ts '\%F \%T \%Z' >> /var/log/cron/${label}_script.log
EOF
chmod +x "$DST"