# docker-learning

**Repository Path**: wangzhe_spring/docker-learning

## Basic Information

- **Project Name**: docker-learning
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-01-11
- **Last Updated**: 2021-01-11

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

#### 1. 安装docker

```bash
# 安装依赖
sudo yum install -y yum-utils device-mapper-persistent-data lvm2

# 设置阿里云镜像源
sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

# 安装Docker-CE
sudo yum install docker-ce

# 镜像加速配置
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://s4wxquzh.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
```

#### 2. 通过dockerfile构建镜像

将jdk、jar包上传到服务器目录/root/docker/dockerfile/

```bash
# 编辑dockerfile
cd /root/docker/dockerfile/
vi dockerfile

# 添加以下内容
FROM centos:7
RUN mkdir /usr/local/java
ADD jdk-8u161-linux-x64.tar.gz /usr/local/java/
ENV JAVA_HOME=/usr/local/java/jdk1.8.0_161
ENV JRE_HOME=$JAVA_HOME/jre
ENV PATH=$JAVA_HOME/bin:$PATH
COPY hot.jar /usr/local/
COPY hot.sh /usr/local/
EXPOSE 8080/tcp
CMD [ "sh", "-c", "/usr/local/hot.sh" ]
```

```bash
# 构建镜像
docker build -f dockerfile -t lgedu/hot:1.0 .
# 检查能否运行容器
docker run --rm -p 8080:8080 --name hot -d lgedu/hot:1.0
# 停止hot容器
docker stop hot
```

#### 3. 配置swarm集群

```bash
# 创建集群
docker swarm init --advertise-addr 192.168.42.173
Swarm initialized: current node (mqyz48xslt2mc202flfusrxq9) is now a manager.

To add a worker to this swarm, run the following command:

    docker swarm join --token SWMTKN-1-53rf5i844rxa372vcr7gkle6go9eqcowr2qrnjz60oa7yxl5r2-9m1gor7rbk4g65x6qiqh2pkrl 192.168.42.173:2377

To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.

# 在node2上将node2添加到node1上的swarm集群
docker swarm join --token SWMTKN-1-53rf5i844rxa372vcr7gkle6go9eqcowr2qrnjz60oa7yxl5r2-9m1gor7rbk4g65x6qiqh2pkrl 192.168.42.173:2377
```

#### 4. 安装Compose

```bash
# 下载Compose
curl -L "https://github.com/docker/compose/releases/download/1.26.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
# 设置权限
chmod -x /usr/local/bin/docker-compose
# 添加软链接，方便调用
ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
# 测试安装
docker-compose --version
```

#### 5. 创建模板文件

```bash
mkdir -p /root/docker/compose/
cd /root/docker/compose/
vi docker-compose.yml
```

```yaml
# docker-compose.yml
version: "3.0"
services:
  hot:
    image: lgedu/hot:1.0
    ports:
      - 8080:8080
    deploy:
      mode: replicated
      replicas: 2
  mysql:
    image: mysql:5.7
    ports:
      - 3306:3306
    environment:
      MYSQL_ROOT_PASSWORD: "admin"
    deploy:
      mode: replicated
      replicas: 2
  redis:
    image: redis:5.0.9
    ports:
      - 6379:6379
    deploy:
      mode: replicated
      replicas: 2
```

```bash
# 运行
docker stack deploy -c docker-compose.yml web
# 查看服务
docker stack services web
# 删除服务
docker stack rm web
```