DOCKER学习_018:Docker-Compose文件简介
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通过之前的示例，其实我们可以看到，所有服务的管理，都是依靠docker-compose.yml文件来实现的。那么我们接下来就详细说一说docker-compose.yml文件中的常用指令。
compose文件使用yml格式，docker规定了一些指令，使用它们可以去设置对应的东西，主要分为了四个区域：
- version：用于指定当前docker-compose.yml语法遵循哪个版本
- services：服务，在它下面可以定义应用需要的一些服务，每个服务都有自己的名字、使用的镜像、挂载的数据卷、所属的网络、依赖哪些其他服务等等。
- networks：应用的网络，在它下面可以定义应用的名字、使用的网络类型等。
- volumes：数据卷，在它下面可以定义数据卷，然后挂载到不同的服务下去使用。
官方网站：https://docs.docker.com/compose/
1 version
用于指定当前compose文件语法遵循哪个版本，下面这张表是不同的Compose文件版本兼容的Docker版本：
[root@docker-server3 docker-compose]# docker-compose version
docker-compose version 1.25.0, build 0a186604 docker-py version: 4.1.0 CPython version: 3.7.4 OpenSSL version: OpenSSL 1.1.0l 10 Sep 2019
这里的版本是这个指令的版本，上面的版本是语法的版本，语法不停的更新，version就是指定语法版本
也可以精确到小版本
将前面的版本修改为1，尝试
[root@docker-server3 docker-compose]# vi docker-compose.yml
version: ‘1‘ services: httpd-test: image: httpd:2.4 httpd-test-2: image: httpd:2.4 volumes: - "/data:/var/www/html" ports: - "80:80" httpd-test-3: image: httpd:2.4 volumes: - "/data:/usr/local/apache2/htdocs" ports: - "8080:80"
[root@docker-server3 docker-compose]# docker-compose stop
使用指令报版本错误
ERROR: Version in "./docker-compose.yml" is invalid. You might be seeing this error because you‘re using the wrong Compose file version. Either specify a supported version (e.g "2.2" or "3.3") and place your service definitions under the `services` key, or omit the `version` key and place your service definitions at the root of the file to use version 1. For more on the Compose file format versions, see https://docs.docker.com/compose/compose-file/
2 services
定义 docker- compose管理的服务，包括服务的名称、使用的镜像、挂载的数据卷、所属的网络、依赖等等
上面的实例
[root@docker-server3 docker-compose]# vi docker-compose.yml
version: ‘3‘ services: #docker run -d --name docker-compose_httpd-test_1 httpd:2.4 httpd-test: image: httpd:2.4 #docker run -d --name docker-compose_httpd-test-2_1 -v /data:/var/www/html -p 80:80 httpd:2.4 httpd-test-2: image: httpd:2.4 volumes: - "/data:/var/www/html" ports: - "80:80" #docker run -d --name docker-compose_httpd-test-3_1 -v /data:/usr/local/apache2/htdocs:rw -p 8080:80 httpd:2.4 httpd-test-3: image: httpd:2.4 volumes: - "/data:/usr/local/apache2/htdocs:rw" ports: - "8080:80"
上面一共三个容器，使用dockers run运行就是
docker run -d --name docker-compose_httpd-test_1 httpd:2.4 docker run -d --name docker-compose_httpd-test-2_1 -v /data:/var/www/html -p 80:80 httpd:2.4 docker run -d --name docker-compose_httpd-test-3_1 -v /data:/usr/local/apache2/htdocs:rw -p 8080:80 httpd:2.4
第一行缩进就是容器的名字，但是在启动后，docker-compose会自动添加信息作为容器的名字
image：就是镜像的名字
容器在docker-compose都是后台运行的
3 volumes
自定义数据卷
下面的- 表示可以跟多个
version: ‘3‘ services: httpd-test-2: image: httpd:2.4 volumes: - "/data:/var/www/html" - "/etc/localtime:/etc/localtime" ports: - "80:80" - "2222:22"
docker命令：docker run -d --name docker-compose_httpd-test-2_1 -v /data:/var/www/html -v /etc/localtime:/etc/localtime -p 2222:22 -p 80:80 httpd:2.4
volumes，可以不指定挂载路径，则会把路径挂载在本地的默认路径下使用driver：local
4 environment
相当于-e传参数
version: ‘3‘ services: httpd-test: image: httpd:2.4 httpd-test-2: image: httpd:2.4 volumes: - "/data:/var/www/html" - "/etc/localtime:/etc/localtime" ports: - "80:80" - "2222:22" httpd-test-3: image: httpd:2.4 volumes: - "/data:/usr/local/apache2/htdocs:rw" ports: - "8080:80" environment: index: "test"
[root@docker-server3 docker-compose]# docker-compose up -d
Recreating docker-compose_httpd-test-2_1 ... Recreating docker-compose_httpd-test-2_1 ... done Recreating docker-compose_httpd-test-3_1 ... done
[root@docker-server3 docker-compose]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES ab6ac7926b25 httpd:2.4 "httpd-foreground" 6 seconds ago Up 4 seconds 0.0.0.0:8080->80/tcp docker-compose_httpd-test-3_1 c47a18060afe httpd:2.4 "httpd-foreground" 6 seconds ago Up 4 seconds 0.0.0.0:80->80/tcp, 0.0.0.0:2222->22/tcp docker-compose_httpd-test-2_1 a1dabe398019 httpd:2.4 "httpd-foreground" 24 hours ago Up 24 hours 80/tcp docker-compose_httpd-test_1
[root@docker-server3 docker-compose]# docker exec -it ab6ac7926b25 /bin/bash
root@ab6ac7926b25:/usr/local/apache2# env index=test #定义的环境变量 HOSTNAME=ab6ac7926b25 PWD=/usr/local/apache2 HTTPD_VERSION=2.4.41 HOME=/root HTTPD_PATCHES= TERM=xterm HTTPD_SHA256=133d48298fe5315ae9366a0ec66282fa4040efa5d566174481077ade7d18ea40 SHLVL=1 PATH=/usr/local/apache2/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HTTPD_PREFIX=/usr/local/apache2 _=/usr/bin/env
5 networks
网络决定了服务之间以及服务和外界之间如何去通信，在执行docker-compose up的时候，docker会默认创建一个默认网络，创建的服务也会默认的使用这个默认网络。服务和服务之间，可以使用服务的名字进行通信，也可以自己创建网络，并将服务加入到这个网络之中，这样服务之间可以相互通信，而外界不能够与这个网络中的服务通信，可以保持隔离性。
使用host网络
version: ‘3‘ services: httpd-test: image: httpd:2.4 httpd-test-2: image: httpd:2.4 volumes: - "/data:/var/www/html" - "/etc/localtime:/etc/localtime" ports: - "2222:22" httpd-test-3: image: httpd:2.4 volumes: - "/data:/usr/local/apache2/htdocs:rw" network_mode: host #ports: # - "8080:80" environment: index: "test"
[root@docker-server3 docker-compose]# docker-compose up -d
Recreating docker-compose_httpd-test-3_1 ... Recreating docker-compose_httpd-test-3_1 ... done Recreating docker-compose_httpd-test-2_1 ... done
[root@docker-server3 docker-compose]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 5ab1c92c7465 httpd:2.4 "httpd-foreground" 4 seconds ago Up 3 seconds docker-compose_httpd-test-3_1 84bc3e5e4622 httpd:2.4 "httpd-foreground" 4 seconds ago Up 3 seconds 80/tcp, 0.0.0.0:2222->22/tcp docker-compose_httpd-test-2_1 a1dabe398019 httpd:2.4 "httpd-foreground" 24 hours ago Up 24 hours 80/tcp docker-compose_httpd-test_1
进入容器确认配置
[root@docker-server3 docker-compose]# docker exec -it 5ab1c92c7465 /bin/bash
root@docker-server3:/usr/local/apache2# apt update
root@docker-server3:/usr/local/apache2# apt install net-tools
root@docker-server3:/usr/local/apache2# netstat -ntlp
Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN - tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN - tcp6 0 0 :::2222 :::* LISTEN - tcp6 0 0 :::80 :::* LISTEN 1/httpd tcp6 0 0 :::22 :::* LISTEN - tcp6 0 0 ::1:25 :::* LISTEN -
root@docker-server3:/usr/local/apache2# apt install iproute2
root@docker-server3:/usr/local/apache2# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:f0:04:c9 brd ff:ff:ff:ff:ff:ff inet 192.168.132.133/24 brd 192.168.132.255 scope global noprefixroute ens33 valid_lft forever preferred_lft forever inet6 fe80::96b0:35ea:c6b0:7bbb/64 scope link noprefixroute valid_lft forever preferred_lft forever 3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:ec:71:fc:86 brd ff:ff:ff:ff:ff:ff inet 192.168.0.1/24 brd 192.168.0.255 scope global docker0 valid_lft forever preferred_lft forever 4: br-8f5945aac199: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:b0:d4:21:b4 brd ff:ff:ff:ff:ff:ff inet 172.22.16.1/24 brd 172.22.16.255 scope global br-8f5945aac199 valid_lft forever preferred_lft forever 5: br-a1db538e7759: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:cf:8b:20:fd brd ff:ff:ff:ff:ff:ff inet 172.18.0.1/16 brd 172.18.255.255 scope global br-a1db538e7759 valid_lft forever preferred_lft forever inet6 fe80::42:cfff:fe8b:20fd/64 scope link valid_lft forever preferred_lft forever 12475: br-4b1032d9c860: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default link/ether 02:42:77:39:81:1e brd ff:ff:ff:ff:ff:ff inet 172.19.0.1/16 brd 172.19.255.255 scope global br-4b1032d9c860 valid_lft forever preferred_lft forever inet6 fe80::42:77ff:fe39:811e/64 scope link valid_lft forever preferred_lft forever 12487: veth5185239@if12486: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br-4b1032d9c860 state UP group default link/ether d2:ea:d1:45:fb:fd brd ff:ff:ff:ff:ff:ff link-netnsid 1 inet6 fe80::d0ea:d1ff:fe45:fbfd/64 scope link valid_lft forever preferred_lft forever 12493: veth4949bb2@if12492: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br-4b1032d9c860 state UP group default link/ether 8e:ff:3d:8b:a7:07 brd ff:ff:ff:ff:ff:ff link-netnsid 0 inet6 fe80::8cff:3dff:fe8b:a707/64 scope link valid_lft forever preferred_lft forever
6 安装Harbor的各个文件解释
[root@docker-server3 docker-compose]# cd /usr/local/harbor/
[root@docker-server3 harbor]# ll
drwxr-xr-x 3 root root 20 Jan 3 03:34 common -rw-r--r-- 1 root root 5345 Jan 3 03:57 docker-compose.yml -rw-r--r-- 1 root root 5821 Jan 3 03:57 harbor.yml -rwxr-xr-x 1 root root 5088 Nov 18 03:37 install.sh -rw-r--r-- 1 root root 11347 Nov 18 03:37 LICENSE drwxr-xr-x 2 root root 60 Jan 3 03:33 pki -rwxr-xr-x 1 root root 1748 Nov 18 03:37 prepare
最初只有harbor.yml,install.sh,和prepare三个文件
修改harbar.yml文件，然后执行prepare，就会把所有的需要的文件放在common里面。同时生成一个docker-compose,yml文件
install.sh就是把docker-compose.yml文件启动起来
所以也可以不用instll.sh.直接启动
[root@docker-server3 harbor]# docker-compose up -d
Creating harbor-log ... done Creating registryctl ... done Creating harbor-portal ... done Creating harbor-db ... done Creating registry ... done Creating redis ... done Creating harbor-core ... done Creating nginx ... done Creating harbor-jobservice ... done
[root@docker-server3 harbor]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES e4c160319a13 goharbor/harbor-jobservice:v1.9.3 "/harbor/harbor_jobs…" 30 seconds ago Up 29 seconds (health: starting) harbor-jobservice 4148f0b1f95f goharbor/nginx-photon:v1.9.3 "nginx -g ‘daemon of…" 30 seconds ago Up 29 seconds (health: starting) 0.0.0.0:80->8080/tcp, 0.0.0.0:443->8443/tcp nginx 6b29d3e6b527 goharbor/harbor-core:v1.9.3 "/harbor/harbor_core" 30 seconds ago Up 29 seconds (health: starting) harbor-core e984dd36124a goharbor/redis-photon:v1.9.3 "redis-server /etc/r…" 31 seconds ago Up 30 seconds (health: starting) 6379/tcp redis 9a95a1282c96 goharbor/registry-photon:v2.7.1-patch-2819-2553-v1.9.3 "/entrypoint.sh /etc…" 31 seconds ago Up 30 seconds (health: starting) 5000/tcp registry 1cb8ff7be670 goharbor/harbor-db:v1.9.3 "/docker-entrypoint.…" 31 seconds ago Up 30 seconds (healthy) 5432/tcp harbor-db 88ab0ce7c486 goharbor/harbor-portal:v1.9.3 "nginx -g ‘daemon of…" 31 seconds ago Up 30 seconds (healthy) 8080/tcp harbor-portal 6abda5d0dc91 goharbor/harbor-registryctl:v1.9.3 "/harbor/start.sh" 31 seconds ago Up 30 seconds (healthy) registryctl 816b9f7851c3 goharbor/harbor-log:v1.9.3 "/bin/sh -c /usr/loc…" 31 seconds ago Up 31 seconds (healthy) 127.0.0.1:1514->10514/tcp harbor-log
7 查看docker-compose.yml
[root@docker-server3 harbor]# cat docker-compose.yml
version: ‘2.3‘ services: log: image: goharbor/harbor-log:v1.9.3 container_name: harbor-log restart: always dns_search: . cap_drop: - ALL cap_add: - CHOWN - DAC_OVERRIDE - SETGID - SETUID volumes: - /var/log/harbor/:/var/log/docker/:z #这里是容器日志的位置 - ./common/config/log/logrotate.conf:/etc/logrotate.d/logrotate.conf:z - ./common/config/log/rsyslog_docker.conf:/etc/rsyslog.d/rsyslog_docker.conf:z ports: - 127.0.0.1:1514:10514 networks: - harbor registry: image: goharbor/registry-photon:v2.7.1-patch-2819-2553-v1.9.3 container_name: registry restart: always cap_drop: - ALL cap_add: - CHOWN - SETGID - SETUID volumes: - /data/registry:/storage:z - ./common/config/registry/:/etc/registry/:z - type: bind source: /data/secret/registry/root.crt target: /etc/registry/root.crt networks: - harbor dns_search: . depends_on: - log logging: driver: "syslog" options: syslog-address: "tcp://127.0.0.1:1514" tag: "registry" registryctl: image: goharbor/harbor-registryctl:v1.9.3 #镜像 container_name: registryctl #容器的hostname env_file: - ./common/config/registryctl/env restart: always #容器挂掉自动重启 cap_drop: - ALL cap_add: - CHOWN - SETGID - SETUID volumes: - /data/registry:/storage:z #：z表示使用默认权限 - ./common/config/registry/:/etc/registry/:z - type: bind #写法不同，功能是一致的 source: ./common/config/registryctl/config.yml target: /etc/registryctl/config.yml networks: - harbor #使用的自定义的网络 dns_search: . depends_on: #依赖的容器 - log logging: #定义的日志输出 driver: "syslog" options: syslog-address: "tcp://127.0.0.1:1514" #这是把日志输出到log日志容器里面 tag: "registryctl" postgresql: image: goharbor/harbor-db:v1.9.3 container_name: harbor-db restart: always cap_drop: - ALL cap_add: - CHOWN - DAC_OVERRIDE - SETGID - SETUID volumes: - /data/database:/var/lib/postgresql/data:z networks: harbor: dns_search: . env_file: #单个写是environment定义环境变量，但是也可以统一写道一个文件，然后使用这个调用 - ./common/config/db/env depends_on: - log logging: driver: "syslog" options: syslog-address: "tcp://127.0.0.1:1514" tag: "postgresql" core: image: goharbor/harbor-core:v1.9.3 container_name: harbor-core env_file: - ./common/config/core/env restart: always cap_drop: - ALL cap_add: - SETGID - SETUID volumes: - /data/ca_download/:/etc/core/ca/:z - /data/psc/:/etc/core/token/:z - /data/:/data/:z - ./common/config/core/certificates/:/etc/core/certificates/:z - type: bind source: ./common/config/core/app.conf target: /etc/core/app.conf - type: bind source: /data/secret/core/private_key.pem target: /etc/core/private_key.pem - type: bind source: /data/secret/keys/secretkey target: /etc/core/key networks: harbor: dns_search: . depends_on: - log - registry - redis - postgresql logging: driver: "syslog" options: syslog-address: "tcp://127.0.0.1:1514" tag: "core" portal: image: goharbor/harbor-portal:v1.9.3 container_name: harbor-portal restart: always cap_drop: - ALL cap_add: - CHOWN - SETGID - SETUID - NET_BIND_SERVICE networks: - harbor dns_search: . depends_on: - log logging: driver: "syslog" options: syslog-address: "tcp://127.0.0.1:1514" tag: "portal" jobservice: image: goharbor/harbor-jobservice:v1.9.3 container_name: harbor-jobservice env_file: - ./common/config/jobservice/env restart: always cap_drop: - ALL cap_add: - CHOWN - SETGID - SETUID volumes: - /data/job_logs:/var/log/jobs:z - type: bind source: ./common/config/jobservice/config.yml target: /etc/jobservice/config.yml networks: - harbor dns_search: . depends_on: - core logging: driver: "syslog" options: syslog-address: "tcp://127.0.0.1:1514" tag: "jobservice" redis: image: goharbor/redis-photon:v1.9.3 container_name: redis restart: always cap_drop: - ALL cap_add: - CHOWN - SETGID - SETUID volumes: - /data/redis:/var/lib/redis networks: harbor: dns_search: . depends_on: - log logging: driver: "syslog" options: syslog-address: "tcp://127.0.0.1:1514" tag: "redis" proxy: image: goharbor/nginx-photon:v1.9.3 container_name: nginx restart: always cap_drop: - ALL cap_add: - CHOWN - SETGID - SETUID - NET_BIND_SERVICE volumes: - ./common/config/nginx:/etc/nginx:z - /data/secret/cert:/etc/cert:z networks: - harbor dns_search: . ports: - 80:8080 - 443:8443 depends_on: - registry - core - portal - log logging: driver: "syslog" options: syslog-address: "tcp://127.0.0.1:1514" tag: "proxy" networks: harbor: external: false
以上就是关于daoker-compose配置文件的一个简单介绍，可以参阅官方的文档，进行更深入的研究
博主声明：本文的内容来源主要来自誉天教育晏威老师，由本人实验完成操作验证，需要的博友请联系誉天教育（http://www.yutianedu.com/），获得官方同意或者晏老师（https://www.cnblogs.com/breezey/）本人同意即可转载，谢谢！
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