update docker
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关于docker compose的安装请移步[docker compose安装与卸载](https://vuepress.mirror.docker-practice.com/compose/install/)或根据[docker官网](https://docs.docker.com/compose/install/)进行安装。
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> 对于docker compose的学习推荐大家多看看一些项目的docker-compose.yml文件是怎么写的，慢慢模仿着去写很多就越来越熟练清晰了。在[Compose文件夹]()下也在网上收集了一些docker-compose.yml文件，欢迎大家一起来补充。
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## 什么是docker compose
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通过之前的介绍，我们知道使用一个 `Dockerfile` 模板文件，可以让用户很方便的定义一个单独的应用容器。然而，在日常工作中，经常会碰到需要多个容器相互配合来完成某项任务的情况。例如要实现一个 Web 项目，除了 Web 服务容器本身，往往还需要再加上后端的数据库服务容器，甚至还包括负载均衡容器等。
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```yaml
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version: "3"
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services:
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elastic:
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image: docker.elastic.co/elasticsearch/elasticsearch:7.6.2
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ports:
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- "9200:9200"
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- "9300:9300"
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volumes:
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- elastic-data:/data
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environment:
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- discovery.type=single-node
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volumes:
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elastic-data:
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```
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```yaml
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version: '2.2'
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services:
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es01:
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image: docker.elastic.co/elasticsearch/elasticsearch:7.6.2
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container_name: es01
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environment:
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- node.name=es01
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- cluster.name=es-docker-cluster
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- discovery.seed_hosts=es02,es03
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- cluster.initial_master_nodes=es01,es02,es03
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- bootstrap.memory_lock=true
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- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
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ulimits:
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memlock:
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soft: -1
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hard: -1
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volumes:
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- data01:/usr/share/elasticsearch/data
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ports:
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- 9200:9200
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networks:
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- elastic
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es02:
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image: docker.elastic.co/elasticsearch/elasticsearch:7.6.2
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container_name: es02
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environment:
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- node.name=es02
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- cluster.name=es-docker-cluster
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- discovery.seed_hosts=es01,es03
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- cluster.initial_master_nodes=es01,es02,es03
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- bootstrap.memory_lock=true
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- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
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ulimits:
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memlock:
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soft: -1
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hard: -1
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volumes:
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- data02:/usr/share/elasticsearch/data
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networks:
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- elastic
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es03:
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image: docker.elastic.co/elasticsearch/elasticsearch:7.6.2
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container_name: es03
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environment:
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- node.name=es03
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- cluster.name=es-docker-cluster
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- discovery.seed_hosts=es01,es02
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- cluster.initial_master_nodes=es01,es02,es03
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- bootstrap.memory_lock=true
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- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
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ulimits:
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memlock:
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soft: -1
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hard: -1
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volumes:
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- data03:/usr/share/elasticsearch/data
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networks:
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- elastic
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volumes:
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data01:
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driver: local
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data02:
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driver: local
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data03:
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driver: local
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networks:
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elastic:
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driver: bridge
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```
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```yaml
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version: '2'
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services:
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etcd1:
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image: quay.io/coreos/etcd:v3.1.13
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restart: always
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ports:
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- 23791:2379
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- 23801:2380
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environment:
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ETCD_NAME: infra1
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ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd1:2380
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ETCD_INITIAL_CLUSTER: infra3=http://etcd3:2380,infra1=http://etcd1:2380,infra2=http://etcd2:2380
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ETCD_INITIAL_CLUSTER_STATE: new
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ETCD_INITIAL_CLUSTER_TOKEN: etcd-tasting-01
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ETCD_LISTEN_CLIENT_URLS: http://etcd1:2379,http://localhost:2379
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ETCD_LISTEN_PEER_URLS: http://etcd1:2380
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ETCD_ADVERTISE_CLIENT_URLS: http://etcd1:2379
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etcd2:
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image: quay.io/coreos/etcd:v3.1.13
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restart: always
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ports:
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- 23792:2379
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- 23802:2380
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environment:
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ETCD_NAME: infra2
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ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd2:2380
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ETCD_INITIAL_CLUSTER: infra3=http://etcd3:2380,infra1=http://etcd1:2380,infra2=http://etcd2:2380
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ETCD_INITIAL_CLUSTER_STATE: new
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ETCD_INITIAL_CLUSTER_TOKEN: etcd-tasting-01
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ETCD_LISTEN_CLIENT_URLS: http://etcd2:2379,http://localhost:2379
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ETCD_LISTEN_PEER_URLS: http://etcd2:2380
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ETCD_ADVERTISE_CLIENT_URLS: http://etcd2:2379
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etcd3:
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image: quay.io/coreos/etcd:v3.1.13
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restart: always
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ports:
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- 23793:2379
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- 23803:2380
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environment:
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ETCD_NAME: infra3
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ETCD_INITIAL_ADVERTISE_PEER_URLS: http://etcd3:2380
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ETCD_INITIAL_CLUSTER: infra3=http://etcd3:2380,infra1=http://etcd1:2380,infra2=http://etcd2:2380
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ETCD_INITIAL_CLUSTER_STATE: new
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ETCD_INITIAL_CLUSTER_TOKEN: etcd-tasting-01
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ETCD_LISTEN_CLIENT_URLS: http://etcd3:2379,http://localhost:2379
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ETCD_LISTEN_PEER_URLS: http://etcd3:2380
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ETCD_ADVERTISE_CLIENT_URLS: http://etcd3:2379
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```
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### 首先创建master结点的Dockerfile
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在编写之前我们先要创建一个配置master的my.cnf配置文件
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```
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[mysqld]
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log_bin = mysql-bin
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server_id = 10
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```
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之后我们创建master结点的Dockerfile
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```
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FROM mysql:5.7
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ADD ./master/my.cnf /etc/mysql/my.cnf
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```
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### 第二创建slave结点的Dockerfile
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在编写之前我们先要创建一个配置slave结点my.cnf配置文件
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```
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[mysqld]
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log_bin = mysql-bin
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server_id = 11
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relay_log = /var/lib/mysql/mysql-relay-bin
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log_slave_updates = 1
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read_only = 1
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```
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注意要修改server_id为不同值，否则会发生错误，之后我们创建slave结点的Dockerfile
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```
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FROM mysql:5.7
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ADD ./slave/my.cnf /etc/mysql/my.cnf
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```
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### 最终的docker-compose.yml
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我们创建这样一个目录结构
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其中master文件夹存放关于master结点的my.cnf和Dockerfile，slave文件夹存放关于slave结点的my.cnf和Dockerfile。
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```yaml
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version: "3"
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services:
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db-master:
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build:
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context: ./
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dockerfile: master/Dockerfile
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restart: always
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environment:
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MYSQL_DATABASE: 'db'
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# So you don't have to use root, but you can if you like
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MYSQL_USER: 'user'
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# You can use whatever password you like
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MYSQL_PASSWORD: 'password'
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# Password for root access
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MYSQL_ROOT_PASSWORD: 'password'
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ports:
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# <Port exposed> : < MySQL Port running inside container>
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- '3306:3306'
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# Where our data will be persisted
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volumes:
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- my-db-master:/var/lib/mysql
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networks:
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- net-mysql
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db-slave:
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build:
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context: ./
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dockerfile: slave/Dockerfile
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restart: always
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environment:
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MYSQL_DATABASE: 'db'
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# So you don't have to use root, but you can if you like
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MYSQL_USER: 'user'
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# You can use whatever password you like
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MYSQL_PASSWORD: 'password'
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# Password for root access
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MYSQL_ROOT_PASSWORD: 'password'
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ports:
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# <Port exposed> : < MySQL Port running inside container>
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- '3307:3306'
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# Where our data will be persisted
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volumes:
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- my-db-slave:/var/lib/mysql
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networks:
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- net-mysql
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# Names our volume
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volumes:
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my-db-master:
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my-db-slave:
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networks:
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net-mysql:
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driver: bridge
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```
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现在我们就可以通过docker-compose来启动这两个结点了
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```
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docker-compose up -d
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```
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接下来我们就可以看到一些镜像的构建信息，当两个结点都启动之后我们来查看一下两个结点的状态
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```
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docker-compose ps -a
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```
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可以看到两个结点的状态已经是Up了，并且主结点映射在宿主机的3306端口，从结点映射在宿主机的3307端口。我们再来查看一下这两个结点的网络信息，以便后续使用
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```
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docker network ls
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```
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这个就是我们刚才创建的网络，刚才创建的两个结点也挂载在这个网络上，我们来查看一下详细信息
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```
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docker inspect 62fa5033ce48
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```
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这样我们就差看到来两个结点的具体IP地址，因为Docker网络的配置，两个连接到同一network的容器会直接相互连通。
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### 主从配置
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启动之后进入从结点
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```
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docker-compose exec db-slave bash
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```
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进入从结点mysql中
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```
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mysql -u root -p
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```
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在从结点上配置主节点信息，然后把当前结点设置为从结点。
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```
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mysql> CHANGE MASTER TO MASTER_HOST='192.168.64.3', MASTER_USER='root', MASTER_PASSWORD='password', MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=0;
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Query OK, 0 rows affected, 2 warnings (0.11 sec)
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mysql> start slave;
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Query OK, 0 rows affected (0.00 sec)
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```
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正常情况我们应该创建一个用户然后赋予其相应的权限，而不是将root用户配置给他.现在查看一下从结点的状态
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```
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mysql> show slave status\G;
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```
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都显示为YES的话那么我们的主从配置已经成功，现在我们在主节点创建一个test_db3数据库
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然后切换到从结点，可以看到数据已经同步到从结点了
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到这里一个简单的单主节点单从结点的MySQL架构已经搭建完毕。
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```yaml
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version: "3"
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services:
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rabbitmq:
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image: rabbitmq:management
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hostname: myrabbitmq
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ports:
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- "5672:5672"
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- "15672:15672"
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volumes:
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- rabbitmq-data:/var/lib/rabbitmq
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volumes:
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rabbitmq-data:
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```
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查看服务状态
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确定服务正常启动后在浏览器输入网址[http://localhost:15672](http://localhost:15672/#/)，进入RabbitMQ的登陆界面
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默认用户名密码都是guest。登陆之后就可以进入到主界面了
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@ -0,0 +1,32 @@
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```yaml
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version: '2'
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services:
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proxy:
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image: traefik
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command: --api --docker --docker.domain=docker.localhost --logLevel=DEBUG
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networks:
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- apinetwork
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ports:
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- "80:80"
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- "8080:8080"
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock
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- ./traefik.toml:/etc/traefik/traefik.toml
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networks:
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apinetwork:
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external:
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name: fileserver
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```
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注意需要编写traefik.toml文件
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```
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defaultEntryPoints = ["http"]
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insecureSkipVerify = true
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[entryPoints]
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[entryPoints.http]
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address = ":80"
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```
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