From 97cbd3abbec85e27d29bbfafc9a881040ff97532 Mon Sep 17 00:00:00 2001
From: Alex Iribarren <Alex.Iribarren@cern.ch>
Date: Fri, 15 Jan 2021 14:33:25 +0100
Subject: [PATCH] Implement job-level locks
---
reposync/runreposync.sh | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/reposync/runreposync.sh b/reposync/runreposync.sh
index e3c1084..9ce5f65 100755
--- a/reposync/runreposync.sh
+++ b/reposync/runreposync.sh
@@ -33,6 +33,26 @@ REPOPATH="/repo/${REPOPATH}"
# Create REPOPATH even if the repo is empty
[ ! -d $REPOPATH ] && /bin/mkdir -p ${REPOPATH}
+# Let's make absolutely sure there's only one copy of the job running
+LOCKFILE="$REPOPATH/.reposynclock"
+if [[ -f "$LOCKFILE" ]]; then
+ # The lockfile exists, let's check if it's fresh
+ AGE=$((`date +%s` - `stat -c '%Y' $LOCKFILE`))
+ if [[ $AGE -gt 86400 ]]; then
+ echo "$LOCKFILE is over 24 hours old. It's probably stale, so get rid of it."
+ rm -f "$LOCKFILE"
+ fi
+fi
+
+# Grab the lock, exit if you fail
+if !(set -o noclobber; echo "`hostname` ($$)" > "$LOCKFILE") 2> /dev/null; then
+ echo "Lock exists: $LOCKFILE owned by $(cat $LOCKFILE)"
+ exit
+fi
+
+# Delete the lock if we die
+trap 'rm -f "$LOCKFILE"; exit $?' INT TERM EXIT
+
if [[ $RUN_REPOSYNC -eq 1 ]]; then
# Record what's already there first
PRECOUNT=`/usr/bin/find ${REPOPATH} -type f -name "*.rpm" ! -size 0 | /usr/bin/wc -l`
@@ -192,3 +212,7 @@ cat << EOF | log > $OUTPUT
"post_count": ${POSTCOUNT},
"changes": [${LIST}]
EOF
+
+# Clean up after yourself, and release your trap
+rm -f "$LOCKFILE"
+trap - INT TERM EXIT
--
GitLab