30 lines
1.0 KiB

#!/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``.
set -e
label=launch-$SERVICE_NAME
DST=$CONFIGSTORE/$TARGET_SERVICE_NAME/etc/cron/$label
schedule=$(relation-get schedule) || true
if ! echo "$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
$schedule root lock $label -D -p 10 -c "\
dc run --rm $SERVICE_NAME" 2>&1 | ts '\%F \%T \%Z' >> /var/log/cron/${label}_script.log
EOF
chmod +x "$DST"