Moby: Docker ๋ฐ์ดํ„ฐ ํŒŒ์ผ ํฌ๊ธฐ๊ฐ€ 100G ์ž„๊ณ„๊ฐ’์— ๋„๋‹ฌํ•œ ๊ฒฝ์šฐ ์–ด๋–ป๊ฒŒ ์ฒ˜๋ฆฌํ•ฉ๋‹ˆ๊นŒ?

์— ๋งŒ๋“  2016๋…„ 03์›” 29์ผ  ยท  3์ฝ”๋ฉ˜ํŠธ  ยท  ์ถœ์ฒ˜: moby/moby

docker version ์˜ ์ถœ๋ ฅ:

Client:
 Version:      1.8.2-el7.centos
 API version:  1.20
 Package Version: docker-1.8.2-10.el7.centos.x86_64
 Go version:   go1.4.2
 Git commit:   a01dc02/1.8.2
 Built:        
 OS/Arch:      linux/amd64

Server:
 Version:      1.8.2-el7.centos
 API version:  1.20
 Package Version: 
 Go version:   go1.4.2
 Git commit:   a01dc02/1.8.2
 Built:        
 OS/Arch:      linux/amd64

docker info ์˜ ์ถœ๋ ฅ:

Containers: 0
Images: 130
Storage Driver: devicemapper
 Pool Name: docker-253:0-3221586422-pool
 Pool Blocksize: 65.54 kB
 Backing Filesystem: xfs
 Data file: /dev/loop4
 Metadata file: /dev/loop5
 Data Space Used: 107.4 GB
 Data Space Total: 107.4 GB
 Data Space Available: 0 B
 Metadata Space Used: 60.92 MB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.087 GB
 Udev Sync Supported: true
 Deferred Removal Enabled: false
 Data loop file: /var/lib/docker/devicemapper/devicemapper/data
 Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.107-RHEL7 (2015-12-01)
Execution Driver: native-0.2
Logging Driver: json-file
Kernel Version: 3.10.0-229.el7.x86_64
Operating System: CentOS Linux 7 (Core)
CPUs: 12
Total Memory: 31.2 GiB
Name: IP-5-14
ID: DNOS:FC2P:2WH4:OSYL:L2CH:U7HZ:MFL2:ZID3:SYTX:JWKP:TGIN:YYPB
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled

์ถ”๊ฐ€ ํ™˜๊ฒฝ ์„ธ๋ถ€ ์ •๋ณด(AWS, VirtualBox, ๋ฌผ๋ฆฌ์  ๋“ฑ):

๋ฌธ์ œ๋ฅผ ์žฌํ˜„ํ•˜๋Š” ๋‹จ๊ณ„:
์•„๋ž˜ cmd๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ gateway๋ผ๋Š” ๋„์ปค ์ด๋ฏธ์ง€๋ฅผ ์‹คํ–‰ํ•˜๊ณ  ์‹ถ์Šต๋‹ˆ๋‹ค. (๊ฒŒ์ดํŠธ์›จ์ด์˜ Dockerfile์— ๋ฐ๋ชฌ์ด ์—†๋Š” ์ง„์ž…์ ์ด ์„ค์ •๋˜์—ˆ์Šต๋‹ˆ๋‹ค.)

docker run -d -P gateway

๋ฐ›์€ ๊ฒฐ๊ณผ๋ฅผ ์„ค๋ช…ํ•˜์‹ญ์‹œ์˜ค.
์ปจํ…Œ์ด๋„ˆ๋Š” ํ‰์†Œ์™€ ๊ฐ™์ด ์‹คํ–‰ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์˜ˆ์ƒํ•œ ๊ฒฐ๊ณผ๋ฅผ ์„ค๋ช…ํ•˜์„ธ์š”.

[root@IP-5-14 devicemapper]# docker run -d -P gateway
Error response from daemon: Error running DeviceCreate (createSnapDevice) dm_task_run failed

์ค‘์š”ํ•˜๋‹ค๊ณ  ์ƒ๊ฐํ•˜๋Š” ์ถ”๊ฐ€ ์ •๋ณด(์˜ˆ: ๋ฌธ์ œ๊ฐ€ ๊ฐ€๋” ๋ฐœ์ƒํ•จ):

  1. docker info ์—์„œ ์•Œ ์ˆ˜ ์žˆ๋“ฏ์ด ๋ฐ์ดํ„ฐ ๊ณต๊ฐ„์ด ์ž„๊ณ„๊ฐ’ 100G๊นŒ์ง€ ์˜ฌ๋ผ๊ฐ”์Šต๋‹ˆ๋‹ค.
  2. docker rm -f $(docker ps -a -q) ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์ปจํ…Œ์ด๋„ˆ๋ฅผ ์‚ญ์ œํ•  ๋•Œ ๋ชจ๋“  ์ปจํ…Œ์ด๋„ˆ๊ฐ€ ์ œ๊ฑฐ๋˜์—ˆ์ง€๋งŒ ์•„๋ž˜ ์˜ค๋ฅ˜๊ฐ€ ๋ณด๊ณ ๋˜์—ˆ์Šต๋‹ˆ๋‹ค.
Error response from daemon: Cannot destroy container 5d5eed10468b: Driver devicemapper failed to remove root filesystem 5d5eed10468b809475b0eb23bda167e1a962d32092a348936d56e27417dbf578: Error running DeleteDevice dm_task_run failed
  1. docker ps -a ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ 2๋‹จ๊ณ„๋ฅผ ์ˆ˜ํ–‰ํ•œ ํ›„ ๋ชจ๋“  ์ปจํ…Œ์ด๋„ˆ๊ฐ€ ์ œ๊ฑฐ๋˜์—ˆ๋Š”์ง€ ํ™•์ธํ–ˆ์Šต๋‹ˆ๋‹ค. cmd ๊ฒฐ๊ณผ๊ฐ€ ๋น„์–ด ์žˆ์Šต๋‹ˆ๋‹ค. ํ•˜์ง€๋งŒ NONE ์ด๋ฏธ์ง€๋ฅผ ์‚ญ์ œํ•  ๋•Œ ์˜ค๋ฅ˜๊ฐ€ ๋ฐœ์ƒํ•ฉ๋‹ˆ๋‹ค(์•„๋ž˜).
[root@IP-5-14 devicemapper]# docker rmi 6fdebd7b0eb5   
Error response from daemon: Conflict, cannot delete because 6fdebd7b0eb5 is held by an ongoing pull or build
Error: failed to remove images: [6fdebd7b0eb5]

๋ˆ„๊ตฐ๊ฐ€ ๋‚˜์—๊ฒŒ ํ˜ธ์˜๋ฅผ ๋ฒ ํ’€ ์ˆ˜ ์žˆ์Šต๋‹ˆ๊นŒ? ์ •๋ง ๊ณ ๋งˆ์›Œ

๊ฐ€์žฅ ์œ ์šฉํ•œ ๋Œ“๊ธ€

์ปจํ…Œ์ด๋„ˆ์— ํ—ˆ์šฉ๋˜๋Š” ํ’€์„ ๋Š˜๋ ค์•ผ ํ•ฉ๋‹ˆ๋‹ค. ์ด๋ ‡๊ฒŒ ํ•˜๋ ค๋ฉด ๋ชจ๋“  ์ปจํ…Œ์ด๋„ˆ์™€ ์ด๋ฏธ์ง€๋ฅผ ํŒŒ๊ดดํ•  var/lib/docker๋ฅผ ์ œ๊ฑฐํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.

sudo service docker stop
sudo rm -rf /var/lib/docker
sudo dd if=/dev/zero of=/var/lib/docker/devicemapper/devicemapper/data bs=1G count=0 seek=300
์ด๋ ‡๊ฒŒ ํ•˜๋ฉด ๋ฐ์ดํ„ฐ ๊ณต๊ฐ„์ด 300GB๋กœ ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค.

๋ฌธ์ œ๊ฐ€ ํ•ด๊ฒฐ๋ฉ๋‹ˆ๊นŒ? ๋˜ํ•œ ๋„์ปค ํ”„๋กœ์„ธ์Šค๋ฅผ ์ค‘์ง€ํ•˜๊ณ  ๋„์ปค๋ฅผ ๋‹ค์‹œ ์‹œ์ž‘ํ•œ ๋‹ค์Œ ์ด๋ฏธ์ง€๋ฅผ ์ œ๊ฑฐํ•  ์ˆ˜ ์žˆ๋Š”์ง€ ํ™•์ธํ•˜์‹ญ์‹œ์˜ค.

๋ชจ๋“  3 ๋Œ“๊ธ€

์ปจํ…Œ์ด๋„ˆ์— ํ—ˆ์šฉ๋˜๋Š” ํ’€์„ ๋Š˜๋ ค์•ผ ํ•ฉ๋‹ˆ๋‹ค. ์ด๋ ‡๊ฒŒ ํ•˜๋ ค๋ฉด ๋ชจ๋“  ์ปจํ…Œ์ด๋„ˆ์™€ ์ด๋ฏธ์ง€๋ฅผ ํŒŒ๊ดดํ•  var/lib/docker๋ฅผ ์ œ๊ฑฐํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.

sudo service docker stop
sudo rm -rf /var/lib/docker
sudo dd if=/dev/zero of=/var/lib/docker/devicemapper/devicemapper/data bs=1G count=0 seek=300
์ด๋ ‡๊ฒŒ ํ•˜๋ฉด ๋ฐ์ดํ„ฐ ๊ณต๊ฐ„์ด 300GB๋กœ ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค.

๋ฌธ์ œ๊ฐ€ ํ•ด๊ฒฐ๋ฉ๋‹ˆ๊นŒ? ๋˜ํ•œ ๋„์ปค ํ”„๋กœ์„ธ์Šค๋ฅผ ์ค‘์ง€ํ•˜๊ณ  ๋„์ปค๋ฅผ ๋‹ค์‹œ ์‹œ์ž‘ํ•œ ๋‹ค์Œ ์ด๋ฏธ์ง€๋ฅผ ์ œ๊ฑฐํ•  ์ˆ˜ ์žˆ๋Š”์ง€ ํ™•์ธํ•˜์‹ญ์‹œ์˜ค.

๊ณต๊ฐ„์ด ๋ถ€์กฑํ•œ Devicemapper๋Š” ์‹ค์ œ๋กœ ๋งค์šฐ ๊นŒ๋‹ค๋กœ์šธ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. https://github.com/docker/docker/issues/20272์—์„œ ์ด์™€ ๊ด€๋ จ๋œ ๋ฌธ์ œ๋ฅผ ์ถ”์ ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

Docker 1.11์˜ ๊ฒฝ์šฐ ๋ณด๊ด€ํ•  ์—ฌ์œ  ๊ณต๊ฐ„์˜ ์ตœ์†Œ๋Ÿ‰์„ ์ง€์ •ํ•˜๋Š” ์ƒˆ๋กœ์šด ์˜ต์…˜์ด ์žˆ์œผ๋ฉฐ ์ด๋Ÿฌํ•œ ์ƒํ™ฉ์— ๋„๋‹ฌํ•˜๋Š” ๊ฒƒ์„ ๋ฐฉ์ง€ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. https://github.com/docker/docker/pull/20786 ์ฐธ์กฐ

๋‚˜๋Š” ์ด๊ฒƒ์ด ๋ฒ„๊ทธ๊ฐ€ ์•„๋‹ˆ๋ผ ์ง€์› ์งˆ๋ฌธ์ด๋ผ๊ณ  ์ƒ๊ฐํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์ด ๋ฌธ์ œ๋ฅผ ๋‹ซ์„ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์—ฌ๊ธฐ์—์„œ ์ž์œ ๋กญ๊ฒŒ ํ† ๋ก ์„ ๊ณ„์†ํ•˜์‹ญ์‹œ์˜ค.

๊ดœ์ฐฎ์•„. ์ •๋ง ๊ณ ๋งˆ์›Œ. Docker1.11์˜ ์ƒˆ๋กœ์šด ๊ธฐ๋Šฅ์— ๋Œ€ํ•œ ํฌ๋ง

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