kmlabz/sentry-onpremise
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fix(zookeeper): cp: cannot create regular file (#552)

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Hi,

I've been through quite a few different ways of implementing this fix and settled on creating a variable to store the output of checking whether the zookeeper copy target folder exists and copying the snapshot file based on the copy target folder existing. I've ran quite a few manual tests for each option as well. Currently the PR sits on Option 3 from the below options.

**Option 1**
Judging from the [Jira issue](https://issues.apache.org/jira/browse/ZOOKEEPER-3056), it seems like the work around for zookeeper upgrades could be omitted entirely since the issue relates to upgrades from v3.4.10 to v3.5.4. I've tested removing the zookeeper workaround entirely and that install ran smoothly on a clean install of Sentry (no existing data) as well as an install of Sentry that currently has very minimal amount of log entries (roughly 100 log entries). Could we possibly remove the workaround entirely? 

**Option 2**
The second option was to simply add a check to the currently [existing line](https://github.com/getsentry/onpremise/blob/master/install.sh#L178) of whether the copy target folder exists and perform the snapshot file copy only if the copy target folder exists. This is the least amount of code and possibly the simpler fix while also setting the `ZOOKEEPER_SNAPSHOT_TRUST_EMPTY` env var to `true`, however, some unnecessary calculations will be done to determine the `ZOOKEEPER_LOG_FILE_COUNT` and `ZOOKEEPER_SNAPSHOT_FILE_COUNT`.

**Option 3**
I've created a variable to store whether the copy target folder exists and proceed with the zookeeper upgrade workaround only if the copy target folder exists. This means that if the copy target folder does not exist, the env var `ZOOKEEPER_SNAPSHOT_TRUST_EMPTY` will not be set.

Fixes #547.

Co-authored-by: chamirb <chamirb@globalkinetic.com>
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strange-developer 2020-06-29 15:16:42 +02:00 committed by GitHub
parent 131a324af2
commit e75e6f1dee
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17
install.sh
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@ -170,16 +170,17 @@ $dc build --force-rm --parallel
echo ""
echo "Docker images built."
ZOOKEEPER_LOG_FILE_COUNT=$($dcr zookeeper bash -c 'ls 2>/dev/null -Ubad1 -- /var/lib/zookeeper/log/version-2/* | wc -l | tr -d '[:space:]'')
ZOOKEEPER_SNAPSHOT_FILE_COUNT=$($dcr zookeeper bash -c 'ls 2>/dev/null -Ubad1 -- /var/lib/zookeeper/data/version-2/* | wc -l | tr -d '[:space:]'')
# This is a workaround for a ZK upgrade bug: https://issues.apache.org/jira/browse/ZOOKEEPER-3056
if [ "$ZOOKEEPER_LOG_FILE_COUNT" -gt "0" ] && [ "$ZOOKEEPER_SNAPSHOT_FILE_COUNT" -eq "0" ]; then
$dcr -v $(pwd)/zookeeper:/temp zookeeper bash -c 'cp /temp/snapshot.0 /var/lib/zookeeper/data/version-2/snapshot.0'
$dc run -d -e ZOOKEEPER_SNAPSHOT_TRUST_EMPTY=true zookeeper
ZOOKEEPER_SNAPSHOT_FOLDER_EXISTS=$($dcr zookeeper bash -c 'ls 2>/dev/null -Ubad1 -- /var/lib/zookeeper/data/version-2 | wc -l | tr -d '[:space:]'')
if [ "$ZOOKEEPER_SNAPSHOT_FOLDER_EXISTS" -eq "1" ]; then
ZOOKEEPER_LOG_FILE_COUNT=$($dcr zookeeper bash -c 'ls 2>/dev/null -Ubad1 -- /var/lib/zookeeper/log/version-2/* | wc -l | tr -d '[:space:]'')
ZOOKEEPER_SNAPSHOT_FILE_COUNT=$($dcr zookeeper bash -c 'ls 2>/dev/null -Ubad1 -- /var/lib/zookeeper/data/version-2/* | wc -l | tr -d '[:space:]'')
# This is a workaround for a ZK upgrade bug: https://issues.apache.org/jira/browse/ZOOKEEPER-3056
if [ "$ZOOKEEPER_LOG_FILE_COUNT" -gt "0" ] && [ "$ZOOKEEPER_SNAPSHOT_FILE_COUNT" -eq "0" ]; then
$dcr -v $(pwd)/zookeeper:/temp zookeeper bash -c 'cp /temp/snapshot.0 /var/lib/zookeeper/data/version-2/snapshot.0'
$dc run -d -e ZOOKEEPER_SNAPSHOT_TRUST_EMPTY=true zookeeper
fi
fi
echo "Bootstrapping and migrating Snuba..."
$dcr snuba-api bootstrap --force
echo ""