![[도커] 쉘스크립트에 도커 명령어 작성 & Docker compose & swarm](https://img1.daumcdn.net/thumb/R750x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdna%2FrG7K9%2FbtqIM7cEHGo%2FAAAAAAAAAAAAAAAAAAAAAEYks0FtgXLExZHuzDFiACoQn46XBmSYUq6Oextaix2b%2Fimg.png%3Fcredential%3DyqXZFxpELC7KVnFOS48ylbz2pIh7yKj8%26expires%3D1753973999%26allow_ip%3D%26allow_referer%3D%26signature%3DqZFCLXHmfwKJVviNgEXbOlUu4uU%253D)
동일한 컨테이너 이름을 사용할 수 없음
동일한 이름의 컨테이너가 존재하는 경우, 기존 컨테이너를 삭제해야 컨테이너를 생성할 수 있음
vagrant@xenial64:~$ docker container run --name echo -itd -p 8888:8080 myanjini/echo:latest /bin/bash
vagrant@xenial64:~$ docker container run --name echo -itd -p 8889:8080 myanjini/echo:latest /bin/bash
docker: Error response from daemon: Conflict. The container name "/echo" is already in use by container "32b348b10a6244a6f8704bbb67a9450d2ebe7d6e8e40243623bade035edf0acb". You have to remove (or rename) that container to be able to reuse that name.
See 'docker run --help'.
vagrant@xenial64:~$ docker container rm -f echo
echo
vagrant@xenial64:~$ docker container run --name echo -itd -p 8889:8080 myanjini/echo:latest /bin/bash
3148d692d80fb153e48ba95eb3fd5c5b9a5559c3f8bf01242eac9abf69326997
기존에 생성된 컨테이너가 있으면 삭제하고, 새롭게 컨테이너를 생성
vagrant@xenial64:~$ docker container rm -f echo ; docker container run --name echo -itd -p 8889:8080 myanjini/echo:latest /bin/bash
echo
1f6d2aa0a93f07355b73131431d19cdfdff7ef4cb86818393fa5b9a4a9bd75b9
Quiz. 아래 요건을 만족하는 쉘 스크립트를 작성하시오.
-
run.sh 스크립트를 작성합니다.
-
run.sh 스크립트는 실행할 컨테이너의 이름을 파라미터로 입력받습니다. (예) ⇒ $ run.sh echo
-
동일한 이름의 컨테이너가 존재하면 해당 컨테이너를 삭제하고 컨테이너를 실행(생성)합니다.
-
컨테이너 생성 스크립트는 다음과 같은 형식입니다.
docker container run --name 컨테이너이름 -itd -p 8888:8080 myanjini/echo:latest /bin/bash
작성한 스크립트 코드와 실행 결과를 아래 공유 문서에 OO조-OOO 탭에 등록해 주세요. (9월 20일까지)
https://docs.google.com/spreadsheets/d/1ZXAcSGC_1EhUrANhp6Cx91GSFR62fPX2eVyCJ5X4Mv0/edit#gid=0
도커 컴포즈 (P76)
설치
https://docs.docker.com/compose/install/
vagrant@xenial64:~$ sudo curl -L "https://github.com/docker/compose/releases/download/1.27.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 651 100 651 0 0 1517 0 --:--:-- --:--:-- --:--:-- 1517
100 11.6M 100 11.6M 0 0 223k 0 0:00:53 0:00:53 --:--:-- 249k
vagrant@xenial64:~$ sudo chmod +x /usr/local/bin/docker-compose
vagrant@xenial64:~$ docker-compose version
docker-compose version 1.27.2, build 18f557f9
docker-py version: 4.3.1
CPython version: 3.7.7
OpenSSL version: OpenSSL 1.1.0l 10 Sep 2019
docker-compose 명령으로 컨테이너를 실행
https://docs.docker.com/compose/compose-file/
#1 작업 디렉터리 및 docker-compose.yml 파일을 생성
vagrant@xenial64:~$ mkdir ~/compose && cd ~/compose
vagrant@xenial64:~/compose$ vi docker-compose.yml
|
version: "3" # 문법 버전 services: echo: # 컨테이너 이름 image: myanjini/echo:latest # 컨테이너 생성에 사용할 도커 이미지 ports: - 9000:8080 # 포트 포워딩 ⇒ 호스트:컨테이너 |
#2 컨테이너 실행
vagrant@xenial64:~/compose$ docker-compose up
Creating network "compose_default" with the default driver
Creating compose_echo_1 ... done
Attaching to compose_echo_1
echo_1 | 2020/09/16 02:28:49 start server
#3 다른 터미널에서 컨테이너 생성 여부를 확인
vagrant@xenial64:~$ docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
edda7a452f20 myanjini/echo:latest "go run /echo/main.go" About a minute ago Up About a minute 0.0.0.0:9000->8080/tcp compose_echo_1
f6a029954b25 myanjini/echo:latest "/bin/bash" 37 minutes ago Up 37 minutes 0.0.0.0:8888->8080/tcp echo
39786eb6abac wordpress "docker-entrypoint.s…" 3 hours ago Up 3 hours 0.0.0.0:32778->80/tcp wordpress_hostvolume
35eb27e65ad4 mysql:5.7 "docker-entrypoint.s…" 3 hours ago Up 3 hours 3306/tcp, 33060/tcp wordpressdb_hostvolume
#4 컨테이너 중지 (중지와 함께 삭제도 수행)
vagrant@xenial64:~/compose$ docker-compose down
Stopping compose_echo_1 ... done Removing compose_echo_1 ... done Removing network compose_default
vagrant@xenial64:~/compose$ docker container ls -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f6a029954b25 myanjini/echo:latest "/bin/bash" 39 minutes ago Up 39 minutes 0.0.0.0:8888->8080/tcp echo
d6ec70aa8c04 ubuntu:14.04 "/bin/bash" 2 hours ago Exited (0) 2 hours ago volume_from_container
39786eb6abac wordpress "docker-entrypoint.s…" 3 hours ago Up 3 hours 0.0.0.0:32778->80/tcp wordpress_hostvolume
35eb27e65ad4 mysql:5.7 "docker-entrypoint.s…" 3 hours ago Up 3 hours 3306/tcp, 33060/tcp wordpressdb_hostvolume
이미지를 만들고 컨테이너를 실행
#1 기본에 만들어 놓은 Dockerfile, main.go 파일을 작업 디렉터리로 복사
vagrant@xenial64:~/compose$ cp ../chap02/Dockerfile ./
vagrant@xenial64:~/compose$ cp ../chap02/main.go ./
vagrant@xenial64:~/compose$ ls
docker-compose.yml Dockerfile main.go
#2 Dockerfile을 이용해서 이미지를 빌드 후 실행도록 docker-compose.yml 파일을 수정
vagrant@xenial64:~/compose$ vi docker-compose.yml
|
version: "3" services: echo: #image: myanjini/echo:latest build: . ports: - 9000:8080 |
vagrant@xenial64:~/compose$ docker-compose up -d --build
Creating network "compose_default" with the default driver
Building echo ⇐ --build 옵션을 추가했기 때문에 이미지를 빌드(생성)
Step 1/4 : FROM golang:1.9
1.9: Pulling from library/golang
55cbf04beb70: Already exists
1607093a898c: Already exists
9a8ea045c926: Already exists
d4eee24d4dac: Already exists
9c35c9787a2f: Already exists
8b376bbb244f: Already exists
0d4eafcc732a: Already exists
186b06a99029: Already exists
Digest: sha256:8b5968585131604a92af02f5690713efadf029cc8dad53f79280b87a80eb1354
Status: Downloaded newer image for golang:1.9
---> ef89ef5c42a9
Step 2/4 : RUN mkdir /echo
---> Running in cf2401922dea
Removing intermediate container cf2401922dea
---> ce13106f0f84
Step 3/4 : COPY main.go /echo
---> af0fb2e70685
Step 4/4 : CMD [ "go", "run", "/echo/main.go" ]
---> Running in cdcfe7cfad03
Removing intermediate container cdcfe7cfad03
---> 783ef639299e
Successfully built 783ef639299e
Successfully tagged compose_echo:latest
Creating compose_echo_1 ... done vagrant@xenial64:~/compose$ ⇐ -d 옵션을 추가했기 때문에 명령어 입력이 가능 (백그라운드 실행)
vagrant@xenial64:~/compose$ docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
compose_echo latest 783ef639299e About a minute ago 750MB
wordpress latest 420b971d0f8b 4 days ago 546MB
mysql 5.7 ef08065b0a30 5 days ago 448MB
myanjini/echo latest 11c732eb2923 8 months ago 750MB
ubuntu 14.04 6e4f1fe62ff1 9 months ago 197MB
golang 1.9 ef89ef5c42a9 2 years ago 750MB
vagrant@xenial64:~/compose$ docker container ls
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
6cb17d61c6f1 compose_echo "go run /echo/main.go" 4 minutes ago Up 4 minutes 0.0.0.0:9000->8080/tcp compose_echo_1
f6a029954b25 myanjini/echo:latest "/bin/bash" About an hour ago Up About an hour 0.0.0.0:8888->8080/tcp echo
39786eb6abac wordpress "docker-entrypoint.s…" 3 hours ago Up 3 hours 0.0.0.0:32778->80/tcp wordpress_hostvolume
35eb27e65ad4 mysql:5.7 "docker-entrypoint.s…" 3 hours ago Up 3 hours 3306/tcp, 33060/tcp wordpressdb_hostvolume
교재 80페이지부터 84페이지 참고해서 실습을 진행해 주세요.
docker-compose.yml 파일은 아래 수정된 내용을 참고해 주세요.
젠킨스 컨테이너 실행 ⇒ 테스트하지 마세요.
#1 docker-compose.yml 파일 작성
vagrant@xenial64:~/compose$ vi docker-compose.yml
|
version: "3" services: master: container_name: master image: jenkinsci/jenkins ports: - 8080:8080 # volumes: # - ./jenkins_home:/var/jenkins_home |
#2 컨테이너 실행
vagrant@xenial64:~/compose$ docker-compose up
Recreating master ... done Attaching to master
master | Running from: /usr/share/jenkins/jenkins.war
master | webroot: EnvVars.masterEnvVars.get("JENKINS_HOME")
:
master | Sep 16, 2020 3:07:04 AM jenkins.install.SetupWizard init
master | INFO:
master |
master | *************************************************************
master | *************************************************************
master | *************************************************************
master |
master | Jenkins initial setup is required. An admin user has been created and a password generated.
master | Please use the following password to proceed to installation:
master |
master | 0ff8e9cb2798460f888ca6ff23c94e73 ⇐ 초기 관리자 패스워드
master |
master | This may also be found at: /var/jenkins_home/secrets/initialAdminPassword
master |
master | *************************************************************
master | *************************************************************
master | *************************************************************
master |
master | --> setting agent port for jnlp
master | --> setting agent port for jnlp... done
:
master | INFO: Finished Download metadata. 21,138 ms ⇐ 컨테이너 실행 상태
#3 초기 설정 (교재 82~23페이지 참조)
본인 PC에서 브라우저를 실행 후 http://localhost:8080 으로 접속 (VirtualBox 관리자에서 포트 포워딩 필요)
:
#4 마스터 젠킨스 용 SSH 키 생성
vagrant@xenial64:~/compose$ docker container exec -it master ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/var/jenkins_home/.ssh/id_rsa):
Created directory '/var/jenkins_home/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /var/jenkins_home/.ssh/id_rsa.
Your public key has been saved in /var/jenkins_home/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:/RVcQrgb6Kj0zrsCUrjmUgo6fAcBEayVOsQPzUyaDZA jenkins@a0aff5774123
The key's randomart image is:
+---[RSA 2048]----+
|==Bo oo .|
|E*B+ .. o |
|o=+o . .o |
|+ .o. .. o . |
| . o. So. o. |
|. =.. . . .... |
|+= ..o o . |
|=... .o.. |
| o. . o=o |
+----[SHA256]-----+
vagrant@xenial64:~/compose$ docker container exec master cat /var/jenkins_home/.ssh/id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCpRyrGcMe9WNT4rSy2Wnw3q3uU17AWT6M/ONOn7g5PHzxZfwhzUnlndJEgXZMgsL1Q0x1l5McQHKyirpBm+8krrwrtXBfBg1U7S69DYPce247l8jz2Vt11loM3GK0Gn3iFIhJVtzUNoerClaDWmIV3j2oWEqSAbDnFzizhQ7Bz9Eb3cPWJOLtPojHbE7kqdJIv1gfDmfZA9LwMCDobpYq8PswN7wuf8JQDI5naXkmDkNtPRswz+VVqhb/EVzSZSZIab0REN/rK+6RBGprJDXA7YVSkZHN1SVPEQks/FPhP10+rIsWdbYCfkIVQNAk9zXZyB/FnA9palW5RlBIuJvz7 jenkins@a0aff5774123
#5 슬레이브 젠킨스 컨테이너를 생성
vagrant@xenial64:~/compose$ vi docker-compose.yml
|
version: "3" services: master: container_name: master image: jenkinsci/jenkins ports: - 8080:8080 links: - slave01 # volumes: # - ./jenkins_home:/var/jenkins_home slave01: container_name: slave01 image: jenkinsci/ssh-slave environment: - JENKINS_SLAVE_SSH_PUBKEY=ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCpRyrGcMe9WNT4rSy2Wnw3q3uU17AWT6M/ONOn7g5PHzxZfwhzUnlndJEgXZMgsL1Q0x1l5McQHKyirpBm+8krrwrtXBfBg1U7S69DYPce247l8jz2Vt11loM3GK0Gn3iFIhJVtzUNoerClaDWmIV3j2oWEqSAbDnFzizhQ7Bz9Eb3cPWJOLtPojHbE7kqdJIv1gfDmfZA9LwMCDobpYq8PswN7wuf8JQDI5naXkmDkNtPRswz+VVqhb/EVzSZSZIab0REN/rK+6RBGprJDXA7YVSkZHN1SVPEQks/FPhP10+rIsWdbYCfkIVQNAk9zXZyB/FnA9palW5RlBIuJvz7 jenkins@a0aff5774123 |
vagrant@xenial64:~/compose$ docker-compose up -d
vagrant@xenial64:~/compose$ docker-compose ps
Name Command State Ports
------------------------------------------------------------------------------------
master /sbin/tini -- /usr/local/b ... Up 50000/tcp, 0.0.0.0:8080->8080/tcp
slave01 setup-sshd Up 22/tcp
docker-compose를 이용해서 MySQL과 Wordpress를 연동
기존 컨테이너, 이미지, 볼륨, … 등을 모두 삭제
vagrant@xenial64:~/compose$ docker container rm -f $(docker container ls -aq)
vagrant@xenial64:~/compose$ docker image rm -f $(docker image ls -aq)
vagrant@xenial64:~/compose$ docker volume rm -f $(docker volume ls -q)
docker-compose.yml 파일을 생성
|
version: "3.3" services: db: image: library/mysql:5.7 volumes: - /home/vagrant/db_data:/var/lib/mysql restart: always environment: MYSQL_ROOT_PASSWORD: password MYSQL_DATABASE: wordpress MYSQL_USER: wordpress MYSQL_PASSWORD: wordpress wordpress: depends_on: - db image: library/wordpress:latest ports: - "80:80" restart: always environment: WORDPRESS_DB_HOST: db:3306 WORDPRESS_DB_USER: wordpress WORDPRESS_DB_PASSWORD: wordpress WORDPRESS_DB_NAME: wordpress volumes: db_data: {} |
vagrant@xenial64:~/compose$ docker-compose up -d
Creating network "compose_default" with the default driver
Creating volume "compose_db_data" with default driver
Pulling db (library/mysql:5.7)...
5.7: Pulling from library/mysql
d121f8d1c412: Pull complete f3cebc0b4691: Pull complete 1862755a0b37: Pull complete 489b44f3dbb4: Pull complete 690874f836db: Pull complete baa8be383ffb: Pull complete 55356608b4ac: Pull complete 277d8f888368: Pull complete 21f2da6feb67: Pull complete 2c98f818bcb9: Pull complete 031b0a770162: Pull complete Digest: sha256:14fd47ec8724954b63d1a236d2299b8da25c9bbb8eacc739bb88038d82da4919
Status: Downloaded newer image for mysql:5.7
Pulling wordpress (library/wordpress:latest)...
latest: Pulling from library/wordpress
d121f8d1c412: Already exists 58b3577b786a: Pull complete 60538287851f: Pull complete c53ff72fe225: Pull complete 79b018c8773f: Pull complete fbe3e00ac4b0: Pull complete ff35226e1df8: Pull complete ab3b1d46dd82: Pull complete b29cdd230d9a: Pull complete d466b05cf627: Pull complete 771f930f6d23: Pull complete b89a2786f2a3: Pull complete c35594c34f69: Pull complete 8e3c480bd8bf: Pull complete 2d3e26ca1157: Pull complete cc0d53b93bc3: Pull complete dbcd12305020: Pull complete 90356c70a472: Pull complete ceb2ac363e49: Pull complete
202d7e2f6c6c: Pull complete Digest: sha256:7b67b32c076e9463a804182e0356966829d5533184c5064e22a7b97686e2154b
Status: Downloaded newer image for wordpress:latest
Creating compose_db_1 ... done Creating compose_wordpress_1 ... done vagrant@xenial64:~/compose$
vagrant@xenial64:~/compose$ docker-compose ps
Name Command State Ports
----------------------------------------------------------------------------------
compose_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
compose_wordpress_1 docker-entrypoint.sh apach ... Up 0.0.0.0:80->80/tcp
VirtualBox 관리자에서 포트 포워딩 설정
내 PC에서 http://localhost:8888 로 접속
docker-compose scale
호스트 포트가 고정되면 동일한 컨테이너 생성이 불가
docker-compose.yml 파일을 생성
|
version: "3.3" services: db: image: library/mysql:5.7 volumes: - /home/vagrant/db_data:/var/lib/mysql restart: always environment: MYSQL_ROOT_PASSWORD: password MYSQL_DATABASE: wordpress MYSQL_USER: wordpress MYSQL_PASSWORD: wordpress wordpress: depends_on: - db image: library/wordpress:latest ports: - "80" restart: always environment: WORDPRESS_DB_HOST: db:3306 WORDPRESS_DB_USER: wordpress WORDPRESS_DB_PASSWORD: wordpress WORDPRESS_DB_NAME: wordpress volumes: db_data: {} |
vagrant@xenial64:~/compose$ docker-compose up -d
Creating network "compose_default" with the default driver
Creating compose_db_1 ... done Creating compose_wordpress_1 ... done
vagrant@xenial64:~/compose$ docker-compose scale db=2 wordpress=2
WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.
Starting compose_db_1 ... done Creating compose_db_2 ... done Starting compose_wordpress_1 ... done Creating compose_wordpress_2 ... done
vagrant@xenial64:~/compose$ docker-compose ps
Name Command State Ports
------------------------------------------------------------------------------------
compose_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
compose_db_2 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
compose_wordpress_1 docker-entrypoint.sh apach ... Up 0.0.0.0:32779->80/tcp
compose_wordpress_2 docker-entrypoint.sh apach ... Up 0.0.0.0:32780->80/tcp
vagrant@xenial64:~/compose$ docker-compose scale db=4 wordpress=5
WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.
Starting compose_db_1 ... done Starting compose_db_2 ... done Creating compose_db_3 ... done Creating compose_db_4 ... done Starting compose_wordpress_1 ... done Starting compose_wordpress_2 ... done Creating compose_wordpress_3 ... done Creating compose_wordpress_4 ... done Creating compose_wordpress_5 ... done
vagrant@xenial64:~/compose$ docker-compose ps
Name Command State Ports
------------------------------------------------------------------------------------
compose_db_1 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
compose_db_2 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
compose_db_3 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
compose_db_4 docker-entrypoint.sh mysqld Up 3306/tcp, 33060/tcp
compose_wordpress_1 docker-entrypoint.sh apach ... Up 0.0.0.0:32779->80/tcp
compose_wordpress_2 docker-entrypoint.sh apach ... Up 0.0.0.0:32780->80/tcp
compose_wordpress_3 docker-entrypoint.sh apach ... Up 0.0.0.0:32781->80/tcp
compose_wordpress_4 docker-entrypoint.sh apach ... Up 0.0.0.0:32783->80/tcp
compose_wordpress_5 docker-entrypoint.sh apach ... Up 0.0.0.0:32782->80/tcp
vagrant@xenial64:~/compose$ docker-compose scale db=1 wordpress=1
WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.
Stopping and removing compose_db_2 ... done Stopping and removing compose_db_3 ... done Stopping and removing compose_db_4 ... done Stopping and removing compose_wordpress_2 ... done Stopping and removing compose_wordpress_3 ... done Stopping and removing compose_wordpress_4 ... done Stopping and removing compose_wordpress_5 ... done vagrant@xenial64:~/compose$
vagrant@xenial64:~/compose$ docker-compose up -d --scale db=2 ⇐ 컨테이너 실행 시 스케일 조정
Creating network "compose_default" with the default driver
Creating compose_db_1 ... done Creating compose_db_2 ... done Creating compose_wordpress_1 ... done
도커 스웜 클러스터를 구성
테스트 환경 구성 방법1
#1 기존 리소스 정리
모든 가상머진을 중지합니다. 필요하다면 가상 머신 이미지를 삭제해서 디스크 공간도 확보해 두세요.
#2 아래 3개 폴더 아래에 Vagrantfile을 생성
C:\HashiCorp\swarm-manager
|
# -*- mode: ruby -*- # vi: set ft=ruby : Vagrant.configure("2") do |config| # config.vm.box = "centos/7" config.vm.box = "generic/centos7" config.vm.hostname = "swarm-manager" config.vm.network "private_network", ip: "192.168.111.100" config.vm.synced_folder ".", "/home/vagrant/sync", disabled: true end |
C:\HashiCorp\swarm-worker1
|
# -*- mode: ruby -*- # vi: set ft=ruby : Vagrant.configure("2") do |config| # config.vm.box = "centos/7" config.vm.box = "generic/centos7" config.vm.hostname = "swarm-worker1" config.vm.network "private_network", ip: "192.168.111.101" config.vm.synced_folder ".", "/home/vagrant/sync", disabled: true end |
C:\HashiCorp\swarm-worker2
|
# -*- mode: ruby -*- # vi: set ft=ruby : Vagrant.configure("2") do |config| # config.vm.box = "centos/7" config.vm.box = "generic/centos7" config.vm.hostname = "swarm-worker2" config.vm.network "private_network", ip: "192.168.111.102" config.vm.synced_folder ".", "/home/vagrant/sync", disabled: true end |
#3 각 폴더에서 vagrant up 명령으로 가상머신을 생성
C:\HashiCorp\swarm-manager> vagrant up
C:\HashiCorp\swarm-worker1> vagrant up
C:\HashiCorp\swarm-worker2> vagrant up
------------------------------------------------
Host Name IP
============= ===============
swarm-manager 192.168.111.100
swarm-worker1 192.168.111.101
swarm-worker2 192.168.111.102
--------------------------------------------------
#4 도커 스웜 모드의 구조
-
매니저(manager) 노드와 워커(worker) 노드로 구성
-
워커 노드 ⇒ 실제 컨테이너가 생성되고 관리되는 도커 서버
-
매니저 노드 ⇒ 워커 노드를 관리하기 위한 도커 서버
-
매니저 노드는 워커 노드의 역할을 포함
-
클러스터를 구성하기 위해서는 최소 1개 이상의 매니저 노드가 존재해야 함
#5 #3에서 생성한 가상머신에 SSH로 접속 후 도커 설치
C:\HashiCorp\swarm-manager> vagrant ssh
[vagrant@swarm-manager ~]$ sudo su
[root@swarm-manager vagrant]# cd
[root@swarm-manager ~]# yum install -y docker
[root@swarm-manager ~]# systemctl start docker.service
[root@swarm-manager ~]# docker version
[root@swarm-manager ~]# systemctl stop firewalld
C:\HashiCorp\swarm-worker1> vagrant ssh
[vagrant@swarm-worker1 ~]$ sudo su
[root@swarm-worker1 vagrant]# cd
[root@swarm-worker1 ~]# yum install -y docker
[root@swarm-worker1 ~]# systemctl start docker.service
[root@swarm-worker1 ~]# docker version
[root@swarm-worker1 ~]# systemctl stop firewalld
C:\HashiCorp\swarm-worker2> vagrant ssh
[vagrant@swarm-worker2 ~]$ sudo su
[root@swarm-worker2 vagrant]# cd
[root@swarm-worker2 ~]# yum install -y docker
[root@swarm-worker2 ~]# systemctl start docker.service
[root@swarm-worker2 ~]# docker version
[root@swarm-worker2 ~]# systemctl stop firewalld
#6 매니저 역할의 서버에서 스웜 클러스터를 시작
[root@swarm-manager ~]# docker swarm init --advertise-addr 192.168.111.100
~~~~~~~~~~~~~~~~~~~~~ ⇒ 매니저 노드의 주소
Swarm initialized: current node (ym6n02vuulxa9izewh25vdv57) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-51gsqhe3wqo7nj7tffuexh2jphwfjffy0a5anzgbx6ljn0m4as-24zl1npz454ep1olarxsddu0o \
192.168.111.100:2377
⇒ 새로운 워커 노드를 클러스터에 추가할 때 사용하는 비밀키(토큰)
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
#7 워커 노드를 추가
[root@swarm-worker1 ~]# docker swarm join \
> --token SWMTKN-1-51gsqhe3wqo7nj7tffuexh2jphwfjffy0a5anzgbx6ljn0m4as-24zl1npz454ep1olarxsddu0o \
> 192.168.111.100:2377
This node joined a swarm as a worker.
[root@swarm-worker2 ~]# docker swarm join \
> --token SWMTKN-1-51gsqhe3wqo7nj7tffuexh2jphwfjffy0a5anzgbx6ljn0m4as-24zl1npz454ep1olarxsddu0o \
> 192.168.111.100:2377
This node joined a swarm as a worker.
#8 스웜 클러스터에 정상적으로 추가되었는지 확인
[root@swarm-manager ~]# docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS
u0aezhea44cx9z5faipmntbpl swarm-worker2 Ready Active
wdnqgalwfd9828npcr516uw2s swarm-worker1 Ready Active
ym6n02vuulxa9izewh25vdv57 * swarm-manager Ready Active Leader
#9 토큰 확인 및 변경 방법
[root@swarm-manager ~]# docker swarm join-token manager
To add a manager to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-51gsqhe3wqo7nj7tffuexh2jphwfjffy0a5anzgbx6ljn0m4as-3m4lmy22pfapenpxonqvcpobj \
192.168.111.100:2377
[root@swarm-manager ~]# docker swarm join-token worker
To add a worker to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-51gsqhe3wqo7nj7tffuexh2jphwfjffy0a5anzgbx6ljn0m4as-24zl1npz454ep1olarxsddu0o \
192.168.111.100:2377
[root@swarm-manager ~]# docker swarm join-token --rotate manager
Successfully rotated manager join token.
To add a manager to this swarm, run the following command:
docker swarm join \
--token SWMTKN-1-51gsqhe3wqo7nj7tffuexh2jphwfjffy0a5anzgbx6ljn0m4as-2x9uqu2xqgrobck2ho7z10rgh \
192.168.111.100:2377
테스트 환경 구성 방법2 ⇐ 권장
#1 우분투 18.04 를 베이스로 하는 가상머신을 생성하고 도커를 설치
c:\swarm\Vagrantfile
|
# -*- mode: ruby -*- # vi: set ft=ruby : Vagrant.configure("2") do |config| config.vm.box = "ubuntu/bionic64" config.vm.hostname = "swarm-manager" config.vm.network "private_network", ip: "192.168.111.100" config.vm.synced_folder ".", "/vagrant_data", disabled: true end |
C:\swarm> vagrant up
C:\swarm> vagrant ssh
vagrant@swarm-manager:~$ sudo apt update
vagrant@swarm-manager:~$ sudo apt upgrade
vagrant@swarm-manager:~$ sudo apt install -y docker.io
vagrant@swarm-manager:~$ sudo usermod -a -G docker $USER
vagrant@swarm-manager:~$ sudo service docker restart
vagrant@swarm-manager:~$ sudo chmod 666 /var/run/docker.sock
vagrant@swarm-manager:~$ docker version
Client:
Version: 19.03.6
API version: 1.40
Go version: go1.12.17
Git commit: 369ce74a3c
Built: Fri Feb 28 23:45:43 2020
OS/Arch: linux/amd64
Experimental: false
Server:
Engine:
Version: 19.03.6
API version: 1.40 (minimum version 1.12)
Go version: go1.12.17
Git commit: 369ce74a3c
Built: Wed Feb 19 01:06:16 2020
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.3.3-0ubuntu1~18.04.2
GitCommit:
runc:
Version: spec: 1.0.1-dev
GitCommit:
docker-init:
Version: 0.18.0
GitCommit:
vagrant@swarm-manager:~$ exit
logout
Connection to 127.0.0.1 closed.
C:\swarm> vagrant halt
==> default: Attempting graceful shutdown of VM...
#2 #1에서 생성한 가상머신으로 스웜 테스트에서 사용할 가상머신을 복제해서 제작
VirtualBox 관리자 > #1번에서 생성한 가상머신을 선택 > 머신 메뉴 > 복제 메뉴 클릭 (3번 반복)
이름: swarm-manager, swarm-worker1, swarm-worker2 (각각)
경로: c:\swarm
#3 가상머신(도커 스웜의 노드로 동작)을 실행
#3-1 swarm_manager 시작
#3-2 swarm_worker1 시작
$ sudo vi /etc/netplan/50-vagrant.yml
IP를 192.168.111.101 으로 변경 후 저장
$ sudo netplan apply
$ sudo hostnamectl set-hostname swarm-worker1
$ reboot
#3-3 swarm_worker2 시작
$ sudo vi /etc/netplan/50-vagrant.yml
IP를 192.168.111.102 으로 변경 후 저장
$ sudo netplan apply
$ sudo hostnamectl set-hostname swarm-worker2
$ reboot
#4 Bitvise SSH Client로 접속할 수 있도록 키를 등록
#5 Bitvise 실행 > 주소 변경(swarm-manager, swarm-worker1, swarm-worker2 각각) > SSH 접속 (3번 반복)
#7 매니저 역할의 서버에서 스웜 클러스터를 시작
[root@swarm-manager ~]# docker swarm init --advertise-addr 192.168.111.100
~~~~~~~~~~~~~~~~~~~~~ ⇒ 매니저 노드의 주소
Swarm initialized: current node (ym6n02vuulxa9izewh25vdv57) is now a manager.
To add a worker to this swarm, run the following command:
docker swarm join --token SWMTKN-1-5w9hi0j9ahwgnq78w29pbqvm8sdte7osgl261lf6hte4fatgxp-f105esf8p1dvu5cfvkwsb9ukj 192.168.111.100:2377
⇒ 새로운 워커 노드를 클러스터에 추가할 때 사용하는 비밀키(토큰)
To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
#8 워커 노드를 추가
[root@swarm-worker1 ~]# docker swarm join --token SWMTKN-1-5w9hi0j9ahwgnq78w29pbqvm8sdte7osgl261lf6hte4fatgxp-f105esf8p1dvu5cfvkwsb9ukj 192.168.111.100:2377
This node joined a swarm as a worker.
[root@swarm-worker2 ~]# docker swarm join --token SWMTKN-1-5w9hi0j9ahwgnq78w29pbqvm8sdte7osgl261lf6hte4fatgxp-f105esf8p1dvu5cfvkwsb9ukj 192.168.111.100:2377
This node joined a swarm as a worker.
#9 스웜 클러스터에 정상적으로 추가되었는지 확인
[root@swarm-manager ~]# docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
wn5j8nymx704prelscdq8fw54 * swarm-manager Ready Active Leader 19.03.6
i2boml3wjv87wjv35mpi0okgt swarm-worker1 Ready Active 19.03.6
m110afvl76ppbomnlmh6zzwke swarm-worker2 Ready Active 19.03.6
#10 토큰 확인 및 변경 방법
[root@swarm-manager ~]# docker swarm join-token manager
To add a manager to this swarm, run the following command:
docker swarm join --token SWMTKN-1-5w9hi0j9ahwgnq78w29pbqvm8sdte7osgl261lf6hte4fatgxp-5rn4mxiq7va86d04tjqidanjd 192.168.111.100:2377
[root@swarm-manager ~]# docker swarm join-token worker
To add a worker to this swarm, run the following command:
docker swarm join --token SWMTKN-1-5w9hi0j9ahwgnq78w29pbqvm8sdte7osgl261lf6hte4fatgxp-f105esf8p1dvu5cfvkwsb9ukj 192.168.111.100:2377
[root@swarm-manager ~]# docker swarm join-token --rotate manager
Successfully rotated manager join token.
To add a manager to this swarm, run the following command:
docker swarm join --token SWMTKN-1-5w9hi0j9ahwgnq78w29pbqvm8sdte7osgl261lf6hte4fatgxp-bdgqy50v9bt3reswv7upf87ok 192.168.111.100:2377
#11 워커 노드 삭제
vagrant@swarm-worker2:~$ docker swarm leave
Node left the swarm.
vagrant@swarm-manager:~$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
wn5j8nymx704prelscdq8fw54 * swarm-manager Ready Active Leader 19.03.6
i2boml3wjv87wjv35mpi0okgt swarm-worker1 Ready Active 19.03.6
m110afvl76ppbomnlmh6zzwke swarm-worker2 Down Active 19.03.6
vagrant@swarm-manager:~$ docker node rm swarm-worker2
swarm-worker2
vagrant@swarm-manager:~$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
wn5j8nymx704prelscdq8fw54 * swarm-manager Ready Active Leader 19.03.6
i2boml3wjv87wjv35mpi0okgt swarm-worker1 Ready Active 19.03.6
#12 워커 노드를 매니저 노드로 변경
## swarm-manager 노드에서 조인 토큰을 확인
vagrant@swarm-manager:~$ docker swarm join-token worker
To add a worker to this swarm, run the following command:
docker swarm join --token SWMTKN-1-5w9hi0j9ahwgnq78w29pbqvm8sdte7osgl261lf6hte4fatgxp-f105esf8p1dvu5cfvkwsb9ukj 192.168.111.100:2377
## swarm-worker2 노드를 클러스터에 워크 노드로 추가
vagrant@swarm-worker2:~$ docker swarm join --token SWMTKN-1-5w9hi0j9ahwgnq78w29pbqvm8sdte7osgl261lf6hte4fatgxp-f105esf8p1dvu5cfvkwsb9ukj 192.168.111.100:2377
This node joined a swarm as a worker.
### swarm-manager 노드에서 워크 노드 추가를 확인
vagrant@swarm-manager:~$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
wn5j8nymx704prelscdq8fw54 * swarm-manager Ready Active Leader 19.03.6
i2boml3wjv87wjv35mpi0okgt swarm-worker1 Ready Active 19.03.6
8cjqbgqzlf26kszvcyxoy3wgu swarm-worker2 Ready Active 19.03.6
## promote 명령으로 swarm-worker1 노드를 매니저 노드로 승격
vagrant@swarm-manager:~$ docker node promote swarm-worker1
Node swarm-worker1 promoted to a manager in the swarm.
vagrant@swarm-manager:~$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
wn5j8nymx704prelscdq8fw54 * swarm-manager Ready Active Leader 19.03.6
i2boml3wjv87wjv35mpi0okgt swarm-worker1 Ready Active Reachable 19.03.6
8cjqbgqzlf26kszvcyxoy3wgu swarm-worker2 Ready Active 19.03.6
#13 demote 명령으로 매너저 노드를 워커 노드로 변경
vagrant@swarm-manager:~$ docker node demote swarm-worker1
Manager swarm-worker1 demoted in the swarm.
vagrant@swarm-manager:~$ docker node ls
ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION
wn5j8nymx704prelscdq8fw54 * swarm-manager Ready Active Leader 19.03.6
i2boml3wjv87wjv35mpi0okgt swarm-worker1 Ready Active 19.03.6
8cjqbgqzlf26kszvcyxoy3wgu swarm-worker2 Ready Active 19.03.6
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