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今天同事要在docker的jenkins容器里安装sdk,当他把他之前安装好的sdk传我时,我才发现居然有16g,docker的容器整个都才只有10个g,还好让我找到个可以动态扩展docker容器的文章,先分享给大家.
系统:centos 6(64位)
docker版本:1.7.1
docker存储引擎:devicemapper
宿主机分区格式必须是:ext2、ext3、ext4
脚本内容:
cat dynamic_modify_docker_disk.sh
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#This script is dynamic modify docker container disk |
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if [ -z $1 ] || [ -z $2 ]; then |
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echo "Usage: container_name increase_capacity" |
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echo "Example: I want increase 11G to test" |
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echo "The command is: sh `basename $0` test 11" |
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if [ `docker inspect $1 &>>/dev/null && echo 0 || echo 1` -eq 1 ];then |
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echo "The container $1 is no exist!" |
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container_id=`docker inspect -f '{{ .Id }}' $1` |
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now_disk=`dmsetup table /dev/mapper/docker-*-$container_id|awk '{print $2}'` |
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disk=$(($2*1024*1024*1024/512)) |
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if [ $disk -lt $now_disk ];then |
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echo "I can't shink container $1 from $(($now_disk*512/1024/1024/1024))G to ${2}G!I only modify contanier increase disk!" |
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dmsetup table /dev/mapper/docker-*-$container_id|sed "s/0 [0-9]* thin/0 $disk thin/"|dmsetup load /dev/mapper/docker-*-$container_id |
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dmsetup resume /dev/mapper/docker-*-$container_id |
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resize2fs /dev/mapper/docker-*-$container_id |
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echo "dynamic container $1 disk to ${2}G is success!" |
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echo "dynamic container $1 disk to ${2}G is fail!" |
使用方法:
chmod + x dynamic_modify_docker_disk.sh
./dynamic_modify_docker_disk.sh [容器名] [要调整的大小]
example:
./dynamic_modify_docker_disk.sh jenkins 30
我这里把jenkins容器的空间调大了30g.
ps:这个脚本只能增大容器的空间,不能缩小,所以请考虑清楚再使用.有兴趣的可以看看下面这篇文章,他讲得更加详细些.
http://dl528888.blog.51cto.com/2382721/1606170
(责任编辑：IT) |
