Use docker-gc by spotify for cleanup
This commit is contained in:
Sam
parent
2e0d230ad6
commit
29a35d1b5f
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@ -5,3 +5,4 @@ cids/*
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bin/*
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image/nsenter/nsenter
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image/docker-squash
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.gc-state/*
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22
launcher
22
launcher
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@ -320,27 +320,13 @@ RUBY
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if [[ $REPLY =~ ^[Yy]$ || ! $REPLY ]]
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then
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space=$(df /var/lib/docker | awk '{ print $4 }' | grep -v Available)
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echo "Starting Cleanup (bytes free $space)"
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echo "Starting Cleanup"
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STATE_DIR=./.gc-state scripts/docker-gc
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if [[ ! -z `docker ps -aq` ]]; then
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docker inspect -f '{{.Id}},{{.State.Running}},{{.State.FinishedAt}}' $(docker ps -qa) | \
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awk -F, 'BEGIN { TIME=strftime("%FT%T.000000000Z",systime()-60*60*24); } $2=="false" && $3 < TIME {print $1;}' | \
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xargs --no-run-if-empty docker rm >/dev/null 2>/dev/null
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fi
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space=$(df /var/lib/docker | awk '{ print $4 }' | grep -v Available)
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echo "Finished Cleanup (bytes free $space)"
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docker rmi `docker images -a | grep '<none>' | awk '{print $3}'` 2> /dev/null
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let freed=$space-$(df /var/lib/docker | awk '{ print $4 }' | grep -v Available)
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echo $space
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echo $(df /var/lib/docker | awk '{ print $4 }' | grep -v Available)
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output="$freed" | awk '{sum=$1;hum[1024**3]="GB"; hum[1024**2]="MB"; hum[1024]="KB"; for (x=1024**3;x>=1024; x/=1024){ if (sum>=x) { printf "%.2f %s\n",sum/x,hum[x];break }}}'
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[ -z "$output" ] && {
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[[ $freed > 0 ]] && { echo "./launcher cleanup cleared up $freed of disk space."; } || { echo "./launcher cleanup has finished, no files were removed."; }
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} || { echo "./launcher cleanup cleared up $freed of disk space."; }
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else
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exit 1
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fi
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@ -0,0 +1,153 @@
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#!/bin/bash
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# Copyright (c) 2014 Spotify AB.
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#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# This script attempts to garbage collect docker containers and images.
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# Containers that exited more than an hour ago are removed.
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# Images that have existed more than an hour and are not in use by any
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# containers are removed.
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# Note: Although docker normally prevents removal of images that are in use by
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# containers, we take extra care to not remove any image tags (e.g.
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# ubuntu:14.04, busybox, etc) that are used by containers. A naive
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# "docker rmi `docker images -q`" will leave images stripped of all tags,
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# forcing users to re-pull the repositories even though the images
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# themselves are still on disk.
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# Note: State is stored in $STATE_DIR, defaulting to /var/lib/docker-gc
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set -o nounset
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set -o errexit
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GRACE_PERIOD_SECONDS=${GRACE_PERIOD_SECONDS:=3600}
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STATE_DIR=${STATE_DIR:=/var/lib/docker-gc}
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DOCKER=${DOCKER:=docker}
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EXCLUDE_FROM_GC=${EXCLUDE_FROM_GC:=/etc/docker-gc-exclude}
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if [ ! -f "$EXCLUDE_FROM_GC" ]
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then
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EXCLUDE_FROM_GC=/dev/null
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fi
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EXCLUDE_IDS_FILE="exclude_ids"
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function date_parse {
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if date --utc >/dev/null 2>&1; then
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# GNU/date
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echo $(date -u --date "${1}" "+%s")
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else
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# BSD/date
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echo $(date -j -u -f "%F %T" "${1}" "+%s")
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fi
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}
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# Elapsed time since a docker timestamp, in seconds
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function elapsed_time() {
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# Docker 1.5.0 datetime format is 2015-07-03T02:39:00.390284991
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# Docker 1.7.0 datetime format is 2015-07-03 02:39:00.390284991 +0000 UTC
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utcnow=$(date -u "+%s")
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without_ms="${1:0:19}"
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replace_t="${without_ms/T/ }"
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epoch=$(date_parse "${replace_t}")
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echo $(($utcnow - $epoch))
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}
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function compute_exclude_ids() {
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# Find images that match patterns in the EXCLUDE_FROM_GC file and put their
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# id prefixes into $EXCLUDE_IDS_FILE, prefixed with ^
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PROCESSED_EXCLUDES="processed_excludes.tmp"
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# Take each line and put a space at the beginning and end, so when we
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# grep for them below, it will effectively be: "match either repo:tag
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# or imageid". Also delete blank lines or lines that only contain
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# whitespace
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sed 's/^\(.*\)$/ \1 /' $EXCLUDE_FROM_GC | sed '/^ *$/d' > $PROCESSED_EXCLUDES
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# The following looks a bit of a mess, but here's what it does:
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# 1. Get images
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# 2. Skip header line
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# 3. Turn columnar display of 'REPO TAG IMAGEID ....' to 'REPO:TAG IMAGEID'
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# 4. find lines that contain things mentioned in PROCESSED_EXCLUDES
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# 5. Grab the image id from the line
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# 6. Prepend ^ to the beginning of each line
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# What this does is make grep patterns to match image ids mentioned by
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# either repo:tag or image id for later greppage
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$DOCKER images \
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| tail -n+2 \
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| sed 's/^\([^ ]*\) *\([^ ]*\) *\([^ ]*\).*/ \1:\2 \3 /' \
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| grep -f $PROCESSED_EXCLUDES 2>/dev/null \
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| cut -d' ' -f3 \
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| sed 's/^/^/' > $EXCLUDE_IDS_FILE
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}
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# Change into the state directory (and create it if it doesn't exist)
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if [ ! -d "$STATE_DIR" ]
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then
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mkdir -p $STATE_DIR
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fi
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cd "$STATE_DIR"
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# Verify that docker is reachable
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$DOCKER version 1>/dev/null
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# List all currently existing containers
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$DOCKER ps -a -q --no-trunc | sort | uniq > containers.all
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# List running containers
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$DOCKER ps -q --no-trunc | sort | uniq > containers.running
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# compute ids of containers to exclude from GC
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compute_exclude_ids
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# List containers that are not running
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comm -23 containers.all containers.running > containers.exited
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# Find exited containers that finished at least GRACE_PERIOD_SECONDS ago
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echo -n "" > containers.reap.tmp
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cat containers.exited | while read line
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do
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EXITED=$(${DOCKER} inspect -f "{{json .State.FinishedAt}}" ${line})
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ELAPSED=$(elapsed_time $EXITED)
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if [[ $ELAPSED -gt $GRACE_PERIOD_SECONDS ]]; then
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echo $line >> containers.reap.tmp
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fi
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done
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cat containers.reap.tmp | sort | uniq > containers.reap
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# List containers that we will keep.
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comm -23 containers.all containers.reap > containers.keep
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# List images used by containers that we keep.
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# This may be both image id's and repo/name:tag, so normalize to image id's only
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cat containers.keep |
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xargs -n 1 $DOCKER inspect -f '{{.Config.Image}}' 2>/dev/null |
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sort | uniq |
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xargs -n 1 $DOCKER inspect -f '{{.Id}}' 2>/dev/null |
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sort | uniq > images.used
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# List images to reap; images that existed last run and are not in use.
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$DOCKER images -q --no-trunc | sort | uniq > images.all
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comm -23 images.all images.used | grep -v -f $EXCLUDE_IDS_FILE > images.reap || true
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# Reap containers.
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xargs -n 1 $DOCKER rm --volumes=true < containers.reap &>/dev/null || true
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# Reap images.
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xargs -n 1 $DOCKER rmi < images.reap &>/dev/null || true
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