시작하며
AWS Instance information
- type: t2.micro
- size: 3 node ( master, worker1, worker2 )
- os: ubuntu 20.04
AWS Instance Network information
- master instance
- public ip: 13.209.5.232
- private ip: 172.31.32.34
- worker1 instance
- public ip: 15.165.159.52
- private ip: 172.31.36.212
- worker2 instance
- public ip:13.209.67.244
- private ip: 172.31.47.47
AWS security group
기본적으로 보안 설정에 맞게 세팅해야하지만 테스트를 위해 모든 보안포트를 오픈
Docker 설치
- 공식 Docs: https://docs.docker.com/engine/install/ubuntu/
- 위 링크를 참고하여 3개 인스턴스(master, worker1, worker2)에 모두 도커를 설치
명령어
$ sudo apt-get update
$ sudo apt-get install \
ca-certificates \
curl \
gnupg \
lsb-release결과
$ sudo apt-get install \
> ca-certificates \
> curl \
> gnupg \
> lsb-release
Reading package lists... Done
Building dependency tree
Reading state information... Done
lsb-release is already the newest version (11.1.0ubuntu2).
lsb-release set to manually installed.
ca-certificates is already the newest version (20211016~20.04.1).
ca-certificates set to manually installed.
gnupg is already the newest version (2.2.19-3ubuntu2.2).
gnupg set to manually installed.
The following additional packages will be installed:
libcurl4
The following packages will be upgraded:
curl libcurl4
2 upgraded, 0 newly installed, 0 to remove and 64 not upgraded.
Need to get 396 kB of archives.
After this operation, 2048 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://ap-northeast-2.ec2.archive.ubuntu.com/ubuntu focal-updates/main amd64 curl amd64 7.68.0-1ubuntu2.14 [161 kB]
Get:2 http://ap-northeast-2.ec2.archive.ubuntu.com/ubuntu focal-updates/main amd64 libcurl4 amd64 7.68.0-1ubuntu2.14 [235 kB]
Fetched 396 kB in 0s (11.8 MB/s)
(Reading database ... 61718 files and directories currently installed.)
Preparing to unpack .../curl_7.68.0-1ubuntu2.14_amd64.deb ...
Unpacking curl (7.68.0-1ubuntu2.14) over (7.68.0-1ubuntu2.13) ...
Preparing to unpack .../libcurl4_7.68.0-1ubuntu2.14_amd64.deb ...
Unpacking libcurl4:amd64 (7.68.0-1ubuntu2.14) over (7.68.0-1ubuntu2.13) ...
Setting up libcurl4:amd64 (7.68.0-1ubuntu2.14) ...
Setting up curl (7.68.0-1ubuntu2.14) ...
Processing triggers for man-db (2.9.1-1) ...
Processing triggers for libc-bin (2.31-0ubuntu9.9) ...
ubuntu@ip-172-31-32-34:~$ sudo apt-get install ca-certificates curl gnupg lsb-release
Reading package lists... Done
Building dependency tree
Reading state information... Done
lsb-release is already the newest version (11.1.0ubuntu2).
ca-certificates is already the newest version (20211016~20.04.1).
curl is already the newest version (7.68.0-1ubuntu2.14).
gnupg is already the newest version (2.2.19-3ubuntu2.2).
0 upgraded, 0 newly installed, 0 to remove and 64 not upgraded.명령어
$ sudo mkdir -p /etc/apt/keyrings
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
$ echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
$ sudo apt-get update결과
$ sudo apt-get update
Hit:1 http://ap-northeast-2.ec2.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://ap-northeast-2.ec2.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:3 http://ap-northeast-2.ec2.archive.ubuntu.com/ubuntu focal-backports InRelease
Get:4 https://download.docker.com/linux/ubuntu focal InRelease [57.7 kB]
Get:5 https://download.docker.com/linux/ubuntu focal/stable amd64 Packages [20.9 kB]
Get:6 http://security.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Fetched 192 kB in 2s (127 kB/s)
Reading package lists... Done명령어
$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin결과
$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
docker-ce-rootless-extras docker-scan-plugin pigz slirp4netns
Suggested packages:
aufs-tools cgroupfs-mount | cgroup-lite
The following NEW packages will be installed:
containerd.io docker-ce docker-ce-cli docker-ce-rootless-extras docker-compose-plugin docker-scan-plugin pigz slirp4netns
0 upgraded, 8 newly installed, 0 to remove and 64 not upgraded.
Need to get 111 MB of archives.
After this operation, 428 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://ap-northeast-2.ec2.archive.ubuntu.com/ubuntu focal/universe amd64 pigz amd64 2.4-1 [57.4 kB]
Get:2 http://ap-northeast-2.ec2.archive.ubuntu.com/ubuntu focal/universe amd64 slirp4netns amd64 0.4.3-1 [74.3 kB]
Get:3 https://download.docker.com/linux/ubuntu focal/stable amd64 containerd.io amd64 1.6.10-1 [27.7 MB]
Get:4 https://download.docker.com/linux/ubuntu focal/stable amd64 docker-ce-cli amd64 5:20.10.21~3-0~ubuntu-focal [41.5 MB]
Get:5 https://download.docker.com/linux/ubuntu focal/stable amd64 docker-ce amd64 5:20.10.21~3-0~ubuntu-focal [20.5 MB]
Get:6 https://download.docker.com/linux/ubuntu focal/stable amd64 docker-ce-rootless-extras amd64 5:20.10.21~3-0~ubuntu-focal [8394 kB]
Get:7 https://download.docker.com/linux/ubuntu focal/stable amd64 docker-compose-plugin amd64 2.12.2~ubuntu-focal [9567 kB]
Get:8 https://download.docker.com/linux/ubuntu focal/stable amd64 docker-scan-plugin amd64 0.21.0~ubuntu-focal [3622 kB]
Fetched 111 MB in 2s (61.5 MB/s)
Selecting previously unselected package pigz.
(Reading database ... 61718 files and directories currently installed.)
Preparing to unpack .../0-pigz_2.4-1_amd64.deb ...
Unpacking pigz (2.4-1) ...
Selecting previously unselected package containerd.io.
Preparing to unpack .../1-containerd.io_1.6.10-1_amd64.deb ...
Unpacking containerd.io (1.6.10-1) ...
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Preparing to unpack .../2-docker-ce-cli_5%3a20.10.21~3-0~ubuntu-focal_amd64.deb ...
Unpacking docker-ce-cli (5:20.10.21~3-0~ubuntu-focal) ...
Selecting previously unselected package docker-ce.
Preparing to unpack .../3-docker-ce_5%3a20.10.21~3-0~ubuntu-focal_amd64.deb ...
Unpacking docker-ce (5:20.10.21~3-0~ubuntu-focal) ...
Selecting previously unselected package docker-ce-rootless-extras.
Preparing to unpack .../4-docker-ce-rootless-extras_5%3a20.10.21~3-0~ubuntu-focal_amd64.deb ...
Unpacking docker-ce-rootless-extras (5:20.10.21~3-0~ubuntu-focal) ...
Selecting previously unselected package docker-compose-plugin.
Preparing to unpack .../5-docker-compose-plugin_2.12.2~ubuntu-focal_amd64.deb ...
Unpacking docker-compose-plugin (2.12.2~ubuntu-focal) ...
Selecting previously unselected package docker-scan-plugin.
Preparing to unpack .../6-docker-scan-plugin_0.21.0~ubuntu-focal_amd64.deb ...
Unpacking docker-scan-plugin (0.21.0~ubuntu-focal) ...
Selecting previously unselected package slirp4netns.
Preparing to unpack .../7-slirp4netns_0.4.3-1_amd64.deb ...
Unpacking slirp4netns (0.4.3-1) ...
Setting up slirp4netns (0.4.3-1) ...
Setting up docker-scan-plugin (0.21.0~ubuntu-focal) ...
Setting up containerd.io (1.6.10-1) ...
Created symlink /etc/systemd/system/multi-user.target.wants/containerd.service → /lib/systemd/system/containerd.service.
Setting up docker-compose-plugin (2.12.2~ubuntu-focal) ...
Setting up docker-ce-cli (5:20.10.21~3-0~ubuntu-focal) ...
Setting up pigz (2.4-1) ...
Setting up docker-ce-rootless-extras (5:20.10.21~3-0~ubuntu-focal) ...
Setting up docker-ce (5:20.10.21~3-0~ubuntu-focal) ...
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /lib/systemd/system/docker.service.
Created symlink /etc/systemd/system/sockets.target.wants/docker.socket → /lib/systemd/system/docker.socket.
Processing triggers for man-db (2.9.1-1) ...
Processing triggers for systemd (245.4-4ubuntu3.17) ...도커 설치 완료
도커 스웜 설정
마스터 노드 설정
명령어
$ sudo docker swarm init --advertise-addr 마스터노드 IP결과
$ sudo docker swarm init --advertise-addr 13.209.5.232
Swarm initialized: current node (g1qomwugw3e8bcryjdpfext7g) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join --token SWMTKN-1-212cwvdhs276cnspnyif27hj6tkqwlfppuear0ftx2ylrufcr2-eqjv2x4ikn4blm9fcme7aumcw 13.209.5.232:2377
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.워커 노드 설정
마스터 노드로부터 나온 토큰을 워커노드 두개에 입력한다
명령어
$ sudo docker swarm join --token 마스터 노드로부터 발급 받은 토큰결과
$ sudo docker swarm join --token SWMTKN-1-212cwvdhs276cnspnyif27hj6tkqwlfppuear0ftx2ylrufcr2-eqjv2x4ikn4blm9fcme7aumcw 13.209.5.232:2377
This node joined a swarm as a worker.추가
토큰을 재발급 받고 싶을 때 사용하는 명령어
docker swarm join-token --rotate manager마스터 노드와 연결된 워커노드
명령어
$ sudo docker node ls결과
$ sudo docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
g1qomwugw3e8bcryjdpfext7g * ip-172-31-32-34 Ready Active Leader 20.10.21
l8w22rjxvbdoaiyj5k9ybobtv ip-172-31-36-212 Ready Active 20.10.21
rpijguq53l3pvqv6h48w9u1n6 ip-172-31-47-47 Ready Active 20.10.21도커 스웜 테스트
샘플 코드 실행
반복적으로 hello world를 출력하는 단순 코드
명령어
$ sudo docker service create ubuntu:18.04 /bin/sh -c "while true; do echo hello world; sleep 1; done"결과
$ sudo docker service create ubuntu:18.04 /bin/sh -c "while true; do echo hello world; sleep 1; done"
l3szfp6y2z4ynj2fuutyydldd
overall progress: 1 out of 1 tasks
1/1: running [==================================================>]
verify: Service converged 실행 중인 서비스 확인
명령어
$ sudo docker service ls
$ sudo docker service ps 서비스명
$ sudo docker service rm 서비스명결과
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
l3szfp6y2z4y sweet_wu replicated 1/1 ubuntu:18.04
$ sudo docker service ps sweet_wu
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
n6oe7wu49be6 sweet_wu.1 ubuntu:18.04 ip-172-31-32-34 Running Running 8 minutes ago
$ sudo docker service rm sweet_wu
sweet_wu
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS서비스 다수 실행
이름, 컨테이너수, 포트를 명령어를 통해 설정할 수 있음
명령어
$ sudo docker service create --name 서비스명 --replicas 컨테이너수 -p 내부포트:외부포트 도커이미지정보
$ sudo docker service ps 서비스명결과
$ sudo docker service create --name myweb --replicas 2 -p 80:80 nginx
6tdum7rcig32dfj7t6j3yq5j0
overall progress: 2 out of 2 tasks
1/2: running [==================================================>]
2/2: running [==================================================>]
verify: Service converged
$ sudo docker service ps myweb
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
e9khllq0ep04 myweb.1 nginx:latest ip-172-31-36-212 Running Running 3 minutes ago
g1szh8j72n72 myweb.2 nginx:latest ip-172-31-32-34 Running Running 3 minutes ago도커스웜 네트워크
Ingress 네트워크는 어떤 노드로 접근해도 특정 서비스의 컨테이너 접근 가능하며 로드밸런싱 / 라우팅 메쉬(mesh) 기능을 포함
명령어
$ sudo docker network ls
$ sudo docker network ls | grep ingress
$ sudo docker service create --name whoami -p 4567:4567 subicura/whoami:1
$ sudo docker service ls
$ sudo docker service ps whoami결과
$ sudo docker network ls
NETWORK ID NAME DRIVER SCOPE
833b5a0051f8 bridge bridge local
115b1cb00962 docker_gwbridge bridge local
68eb839b2047 host host local
sn9c33a4culz ingress overlay swarm
30a565308637 none null local
$ sudo docker network ls | grep ingress
sn9c33a4culz ingress overlay swarm
$ sudo docker service create --name whoami -p 4567:4567 subicura/whoami:1
hxjf9c2o1t0ou2yayvj7zph4j
overall progress: 1 out of 1 tasks
1/1: running [==================================================>]
verify: Service converged
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
6tdum7rcig32 myweb replicated 2/2 nginx:latest *:80->80/tcp
hxjf9c2o1t0o whoami replicated 1/1 subicura/whoami:1 *:4567->4567/tcp
$ sudo docker service ps whoami
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
ryyvwfls3mxk whoami.1 subicura/whoami:1 ip-172-31-47-47 Running Running 23 seconds ago도커 스웜 스케일링
명령어
$ sudo docker service ls
$ sudo docker service scale myweb=4
$ sudo docker service ps myweb
$ sudo docker service scale myweb=1
$ sudo docker service ps myweb결과
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
6tdum7rcig32 myweb replicated 2/2 nginx:latest *:80->80/tcp
hxjf9c2o1t0o whoami replicated 1/1 subicura/whoami:1 *:4567->4567/tcp
$ sudo docker service scale myweb=4
myweb scaled to 4
overall progress: 4 out of 4 tasks
1/4: running [==================================================>]
2/4: running [==================================================>]
3/4: running [==================================================>]
4/4: running [==================================================>]
verify: Service converged
$ sudo docker service ps myweb
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
e9khllq0ep04 myweb.1 nginx:latest ip-172-31-36-212 Running Running 22 minutes ago
g1szh8j72n72 myweb.2 nginx:latest ip-172-31-32-34 Running Running 22 minutes ago
hdcddwjdogn0 myweb.3 nginx:latest ip-172-31-47-47 Running Running 27 seconds ago
ssddcpjaihi4 myweb.4 nginx:latest ip-172-31-36-212 Running Running 35 seconds ago
$ sudo docker service scale myweb=1
myweb scaled to 1
overall progress: 1 out of 1 tasks
1/1: running [==================================================>]
verify: Service converged
$ sudo docker service ps myweb
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
e9khllq0ep04 myweb.1 nginx:latest ip-172-31-36-212 Running Running 22 minutes ago도커 스웜 글로벌 서비스모드
- 노드별로 하나 이상 생성
- replicas 수를 별도로 지정하지 않음
- 모니터링 노드 생성할 때 유용
명령어
$ sudo docker service ls
$ sudo docker service create --name 서비스명 --mode global 도커이미지
$ sudo docker service ps global_web 결과
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
6tdum7rcig32 myweb replicated 1/1 nginx:latest *:80->80/tcp
hxjf9c2o1t0o whoami replicated 1/1 subicura/whoami:1 *:4567->4567/tcp
$ sudo docker service create --name global_web --mode global nginx
dowjukeq726acp9yelft0s1wu
overall progress: 3 out of 3 tasks
l8w22rjxvbdo: running [==================================================>]
rpijguq53l3p: running [==================================================>]
g1qomwugw3e8: running [==================================================>]
verify: Service converged
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
dowjukeq726a global_web global 3/3 nginx:latest
6tdum7rcig32 myweb replicated 1/1 nginx:latest *:80->80/tcp
hxjf9c2o1t0o whoami replicated 1/1 subicura/whoami:1 *:4567->4567/tcp
$ sudo docker service ps global_web
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
t321rl0vklif global_web.g1qomwugw3e8bcryjdpfext7g nginx:latest ip-172-31-32-34 Running Running 17 seconds ago
45khnprhx6le global_web.l8w22rjxvbdoaiyj5k9ybobtv nginx:latest ip-172-31-36-212 Running Running 17 seconds ago
kx6omnwntxiu global_web.rpijguq53l3pvqv6h48w9u1n6 nginx:latest ip-172-31-47-47 Running Running 17 seconds ago 도커 스웜 서비스 업데이트
명령어
$ sudo docker service ls
$ sudo docker service create --name 서비스명 --replicas 컨테이너수 도커이미지명:버전
$ sudo docker service update --image 도커이미지명:버전 서비스명
$ sudo docker service ps 서비스명결과
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
dowjukeq726a global_web global 3/3 nginx:latest
6tdum7rcig32 myweb replicated 1/1 nginx:latest *:80->80/tcp
hxjf9c2o1t0o whoami replicated 1/1 subicura/whoami:1 *:4567->4567/tcp
$ sudo docker service create --name myweb2 --replicas 3 nginx:1.10
qd1eu3tjjdjf45acogt2h6ar9
overall progress: 3 out of 3 tasks
1/3: running [==================================================>]
2/3: running [==================================================>]
3/3: running [==================================================>]
verify: Service converged
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
dowjukeq726a global_web global 3/3 nginx:latest
6tdum7rcig32 myweb replicated 1/1 nginx:latest *:80->80/tcp
qd1eu3tjjdjf myweb2 replicated 3/3 nginx:1.10
hxjf9c2o1t0o whoami replicated 1/1 subicura/whoami:1 *:4567->4567/tcp
$ sudo docker service update --image nginx:1.11 myweb2
myweb2
overall progress: 3 out of 3 tasks
1/3: running [==================================================>]
2/3: running [==================================================>]
3/3: running [==================================================>]
verify: Service converged
$ sudo docker service ps myweb2
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS
ow32n29nnnkd myweb2.1 nginx:1.11 ip-172-31-32-34 Running Running 27 seconds ago
rch4jxuosu2y \_ myweb2.1 nginx:1.10 ip-172-31-32-34 Shutdown Shutdown 32 seconds ago
jvl24bg33v97 myweb2.2 nginx:1.11 ip-172-31-47-47 Running Running 22 seconds ago
gmxnndcmctco \_ myweb2.2 nginx:1.10 ip-172-31-47-47 Shutdown Shutdown 25 seconds ago
s6z5x7tmcksc myweb2.3 nginx:1.11 ip-172-31-36-212 Running Running 33 seconds ago
pqn55zy7jew0 \_ myweb2.3 nginx:1.10 ip-172-31-36-212 Shutdown Shutdown 37 seconds ago도커 롤링 업데이트
명령어
$ sudo docker service create --replicas 컨테이너수 --name 서비스명 --update-delay 시간 --update-parallelism 개수 도커이미지:버전
$ sudo docker service inspect --pretty 서비스명결과
$ sudo docker service create --replicas 4 --name myweb3 --update-delay 10s --update-parallelism 2 nginx:1.10
79afuzkpcjtqdvduh7ett1hvs
overall progress: 4 out of 4 tasks
1/4: running [==================================================>]
2/4: running [==================================================>]
3/4: running [==================================================>]
4/4: running [==================================================>]
verify: Service converged
$ sudo docker service inspect --pretty myweb3
ID: 79afuzkpcjtqdvduh7ett1hvs
Name: myweb3
Service Mode: Replicated
Replicas: 4
Placement:
UpdateConfig:
Parallelism: 2
Delay: 10s
On failure: pause
Monitoring Period: 5s
Max failure ratio: 0
Update order: stop-first
RollbackConfig:
Parallelism: 1
On failure: pause
Monitoring Period: 5s
Max failure ratio: 0
Rollback order: stop-first
ContainerSpec:
Image: nginx:1.10@sha256:6202beb06ea61f44179e02ca965e8e13b961d12640101fca213efbfd145d7575
Init: false
Resources:
Endpoint Mode: vip도커 스웜 서비스 로그
명령어
$ sudo docker service ls
$ sudo docker service logs 서비스명결과
$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
dowjukeq726a global_web global 3/3 nginx:latest
6tdum7rcig32 myweb replicated 1/1 nginx:latest *:80->80/tcp
qd1eu3tjjdjf myweb2 replicated 3/3 nginx:1.11
79afuzkpcjtq myweb3 replicated 4/4 nginx:1.10
hxjf9c2o1t0o whoami replicated 1/1 subicura/whoami:1 *:4567->4567/tcp
$ sudo docker service logs whoami
whoami.1.ryyvwfls3mxk@ip-172-31-47-47 | [2022-11-23 05:43:35] INFO WEBrick 1.3.1
whoami.1.ryyvwfls3mxk@ip-172-31-47-47 | [2022-11-23 05:43:35] INFO ruby 2.3.3 (2016-11-21) [x86_64-linux]
whoami.1.ryyvwfls3mxk@ip-172-31-47-47 | == Sinatra (v1.4.7) has taken the stage on 4567 for development with backup from WEBrick
whoami.1.ryyvwfls3mxk@ip-172-31-47-47 | [2022-11-23 05:43:35] INFO WEBrick::HTTPServer#start: pid=7 port=4567도커 스웜 서비스 종료
명령어
$ sudo docker service rm 서비스명결과
ubuntu@ip-172-31-32-34:~$ sudo docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
dowjukeq726a global_web global 3/3 nginx:latest
6tdum7rcig32 myweb replicated 1/1 nginx:latest *:80->80/tcp
qd1eu3tjjdjf myweb2 replicated 3/3 nginx:1.11
79afuzkpcjtq myweb3 replicated 4/4 nginx:1.10
hxjf9c2o1t0o whoami replicated 1/1 subicura/whoami:1 *:4567->4567/tcp
ubuntu@ip-172-31-32-34:~$ sudo docker service rm global_web
global_web
ubuntu@ip-172-31-32-34:~$ sudo docker service rm myweb
myweb
ubuntu@ip-172-31-32-34:~$ sudo docker service rm myweb3
myweb3
ubuntu@ip-172-31-32-34:~$ sudo docker service rm whoami
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