Имеется Docker Swarm:
$ docker node ls ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS h8p0sed4q6n6yyheq3wbxum2r fgvwm46c3b5uk000001 Ready Active oaphqh0i6f8kc013fy5goi37u fgvwm46c3b5uk000002 Ready Active qgj0un2g0jsqhhr0izd9fyn0d fgvwm46c3b5uk000000 Ready Active so01pmq9sdl9s34uq1m419m7z * fgvwm46c3b5uk000000 Ready Drain Leader
Задача – перед деплоем “зачистить” старые образы.
Скрипт получает список всех нод фермы (только workers, т.к. менеджеры в статусе Drain), подключается к каждой, проверят занятое место и кол-во образов, после чего удаляет все, кроме используемых контейнерами в настоящий момент.
Собственно – сам скрипт:
#!/usr/bin/env bash
ENV=$1
[[ -z $ENV ]] && { echo -e "ERROR: please secify environemt as first argument. Vaild values are: dev|qa|staging|production. Exit."; exit 1; }
USER=jmadmin
RSA=/home/jmadmin/.ssh/jm-website-sw-$ENV
get_nodes () {
docker node ls | grep Active | cut -d" " -f1 | grep -v ID
}
get_node_df () {
local node_ip=$1
ssh -t -t -o StrictHostKeyChecking=no $USER@$node_ip -i $RSA "bash -c '
docker system df
'"
}
get_node_ip () {
local node=$1
docker inspect $node | grep Addr | cut -d":" -f 2 | sed -e 's/\"//g'
}
cleaup_node () {
local node_ip=$1
ssh -t -t -o StrictHostKeyChecking=no $USER@$node_ip -i $RSA "bash -c '
time docker images -q -a | xargs --no-run-if-empty docker rmi
'"
}
for node in $(get_nodes); do
get_node_df $(get_node_ip $node)
cleaup_node $(get_node_ip $node)
done
И его выполнение (образы уже почищены):
[simterm]
$ ./docker_cleanup.sh dev | tee clean.log TYPE TOTAL ACTIVE SIZE RECLAIMABLE Images 2 2 1.769GB 0B (0%) Containers 2 2 2B 0B (0%) Local Volumes 0 0 0B 0B Connection to 192.168.0.5 closed. Error response from daemon: conflict: unable to delete 0a2de3be37a3 (cannot be forced) - image is being used by running container e727463d8c55 Error response from daemon: conflict: unable to delete 0414859ea855 (cannot be forced) - image is being used by running container a0e26ee428a3 real 0m0.056s user 0m0.036s sys 0m0.004s Connection to 192.168.0.5 closed. TYPE TOTAL ACTIVE SIZE RECLAIMABLE Images 2 2 1.589GB 662.8MB (41%) Containers 2 2 0B 0B Local Volumes 0 0 0B 0B Connection to 192.168.0.6 closed. Error response from daemon: conflict: unable to delete 1e64e6b2ff11 (cannot be forced) - image is being used by running container 33de0fd0cf90 Error response from daemon: conflict: unable to delete d31885df196a (cannot be forced) - image is being used by running container ce6fb77fddfe real 0m0.049s user 0m0.024s sys 0m0.008s Connection to 192.168.0.6 closed. TYPE TOTAL ACTIVE SIZE RECLAIMABLE Images 3 3 2.454GB 662.8MB (27%) Containers 3 3 52.68MB 0B (0%) Local Volumes 0 0 0B 0B Connection to 192.168.0.4 closed. Error response from daemon: conflict: unable to delete d31885df196a (cannot be forced) - image is being used by running container dafcdfe9ff38 Error response from daemon: conflict: unable to delete 0414859ea855 (cannot be forced) - image is being used by running container efa86b80f0fa Error response from daemon: conflict: unable to delete 32d02c3fa8f9 (cannot be forced) - image is being used by running container 4f078aff3fa8 real 0m0.052s user 0m0.028s sys 0m0.008s Connection to 192.168.0.4 closed.
[/simterm]
