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Exclude service images #171

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Exclude service images #171

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11 changes: 11 additions & 0 deletions docker-gc
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,7 @@ SYSLOG_LEVEL=${SYSLOG_LEVEL:=info}
SYSLOG_TAG=${SYSLOG_TAG:=docker-gc}
DRY_RUN=${DRY_RUN:=0}
EXCLUDE_DEAD=${EXCLUDE_DEAD:=0}
EXCLUDE_SERVICE_IMAGE=${EXCLUDE_SERVICE_IMAGE:=0}

for pid in $(pidof -s docker-gc); do
if [[ $pid != $$ ]]; then
Expand Down Expand Up @@ -115,6 +116,16 @@ function compute_exclude_ids() {
# or imageid". Also delete blank lines or lines that only contain
# whitespace
sed 's/^\(.*\)$/ \1 /' $EXCLUDE_FROM_GC | sed '/^ *$/d' > $PROCESSED_EXCLUDES

# Keeping images used by a docker service on other node could be better,
# because those images are likely to be needed when swarm reschedule
# the service.
if [[ $EXCLUDE_SERVICE_IMAGE -gt 0 ]]; then
$DOCKER service ls \
| tail -n+2 \
| sed 's/^\([^ ]*\) *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) *\([^ ]*\).*/ \5 /' >> $PROCESSED_EXCLUDES
fi

# The following looks a bit of a mess, but here's what it does:
# 1. Get images
# 2. Skip header line
Expand Down