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Update repository backups to use ghe-gc-* for lock file management #188

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Merged
merged 2 commits into from
Apr 18, 2016
Merged

Update repository backups to use ghe-gc-* for lock file management #188

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64adbef
Update backups to use ghe-gc
snh Mar 30, 2016
1395498
Merge branch 'master' into snh/gc-toggle
snh Apr 15, 2016
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50 changes: 4 additions & 46 deletions share/github-backup-utils/ghe-backup-repositories-cluster
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Original file line number Diff line number Diff line change
Expand Up @@ -84,68 +84,26 @@ echo "$config" > "$config_file"

opts="$GHE_EXTRA_SSH_OPTS -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o PasswordAuthentication=no"

# Remote sync-in-progress file location. When this file exists, Git GC
# operations are disabled on the GitHub instance.
sync_in_progress_file="$GHE_REMOTE_DATA_USER_DIR/repositories/.sync_in_progress"

# Make sure root backup dir exists if this is the first run
mkdir -p "$backup_dir"

# Removes the remote sync-in-progress file on exit, re-enabling GC operations
# on the remote instance.
cleanup() {
# Enable remote GC operations
for hostname in $hostnames; do
ghe-ssh -F $config_file "$hostname:$port" -- "sudo rm -f '$sync_in_progress_file'"
ghe-gc-enable -F $config_file $hostname:$port
done
rm -f $config_file
}
trap 'cleanup' EXIT
trap 'exit $?' INT # ^C always terminate

wait_pids=""
# Disable remote GC operations
for hostname in $hostnames; do
# Touch the sync-in-progress file, disabling GC operations, and wait for all
# active GC processes to finish on the remote side.
echo "
set -e
sudo -u git touch '$sync_in_progress_file'

sanity=0
while [ \$sanity -lt $GHE_GIT_COOLDOWN_PERIOD ]; do
# note: the bracket synta[x] below is to prevent matches against the
# grep process itself.
if ps axo args | grep -E -e '^git( -.*)? nw-repac[k]( |$)' -e '^git( -.*)? g[c]( |$)' >/dev/null; then
sleep 1
sanity=\$(( sanity + 1 ))
else
exit 0
fi
done
exit 7
" | ssh -q $opts -p $port -F $config_file -l $user $hostname -- /bin/sh
wait_pids="$wait_pids $hostname:$!"
done

# strip leading space
wait_pids="$(echo -e "${wait_pids}" | sed -e 's/^[[:space:]]*//')"

# wait for jobs one by one, bail on the first one
for pid in $wait_pids; do
# pull out pid:hostname pairs into vars
wait_hostname="$(echo $pid | awk 'BEGIN {FS = ":" }; { print $1; }')"
wait_pid="$(echo $pid | awk 'BEGIN {FS = ":" }; { print $2; }')"
wait $wait_pid || {
res=$?
if [ $res = 7 ]; then
echo "Error: Git GC processes remain after $GHE_GIT_COOLDOWN_PERIOD seconds on host: $wait_hostname. Aborting..." 1>&2
fi
exit $res
}
unset wait_hostname wait_pid
ghe-gc-disable -F $config_file $hostname:$port
done

unset wait_pids

# If we have a previous increment, avoid transferring existing files via rsync's
# --link-dest support. This also decreases physical space usage considerably.
if [ -d "$backup_current" ]; then
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34 changes: 4 additions & 30 deletions share/github-backup-utils/ghe-backup-repositories-rsync
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Expand Up @@ -51,46 +51,20 @@ fi
# Perform a host-check and establish GHE_REMOTE_XXX variables.
ghe_remote_version_required "$host"

# Remote sync-in-progress file location. When this file exists, Git GC
# operations are disabled on the GitHub instance.
sync_in_progress_file="$GHE_REMOTE_DATA_USER_DIR/repositories/.sync_in_progress"

# Make sure root backup dir exists if this is the first run
mkdir -p "$backup_dir"

# Removes the remote sync-in-progress file on exit, re-enabling GC operations
# on the remote instance.
cleanup() {
ghe-ssh "$host" -- "sudo rm -f '$sync_in_progress_file'"
# Enable remote GC operations
ghe-gc-enable $host
}
trap 'cleanup' EXIT
trap 'exit $?' INT # ^C always terminate

# Touch the sync-in-progress file, disabling GC operations, and wait for all
# active GC processes to finish on the remote side.
echo "
set -e
sudo -u git touch '$sync_in_progress_file'

sanity=0
while [ \$sanity -lt $GHE_GIT_COOLDOWN_PERIOD ]; do
# note: the bracket synta[x] below is to prevent matches against the
# grep process itself.
if ps axo args | grep -E -e '^git( -.*)? nw-repac[k]( |$)' -e '^git( -.*)? g[c]( |$)' >/dev/null; then
sleep 1
sanity=\$(( sanity + 1 ))
else
exit 0
fi
done
exit 7
" | ghe-ssh "$host" -- /bin/sh || {
res=$?
if [ $res = 7 ]; then
echo "Error: Git GC processes remain after $GHE_GIT_COOLDOWN_PERIOD seconds. Aborting..." 1>&2
fi
exit $res
}
# Disable remote GC operations
ghe-gc-disable $host

# Transfer repository data from a GitHub instance to the current snapshot
# directory, using a previous snapshot to avoid transferring files that have
Expand Down