基于docker安装JDK8

Posted 2023-04-02 小刘不想敲代码

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1，首先去官网下载一个jdk

地址→Java Downloads | Oraclehttps://www.oracle.com/java/technologies/downloads/

2，下载好了之后用Xftp把压缩包拉到虚拟机中

先连接虚拟机

然后在虚拟机上创建一个目录

touch /myjdk

然后把下载好的jdk拖到 /myjdk下面

这里我们就拉取成功了

3，然后在同一个目录下建 Dockerfile

vim Dockerfile

然后进行编写Dockerfile

# 设置docker的运行环境
FROM centos:7
# 编写人
MAINTAINER xiaoliu

ENV MYPATH /usr/local

WORKDIR $MYPATH

# 安装vim编辑器

RUN yum -y install vim

# 安装ifconfig命令查看网络IP

RUN yum -y install net-tools

# 安装java8及lib库

RUN yum -y install glibc.i686

RUN mkdir /usr/local/java
# 将宿主机的文件拷贝到容器的具体目录中。这里使用ADD，拷贝后自动解压，如果不需要解压，可以使用COPY
ADD jdk-8u341-linux-x64.tar.gz /usr/local/java/
# 配置jdk环境
ENV JAVA_HOME /usr/local/java/jdk.8.0_341
ENV JRE_HOME $JAVA_HOME/jre
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH
ENV PATH $JAVA_HOME/bin:$PATH

EXPOSE 80

CMD echo $MYPATHc
CMD echo "success---------ok"
CMD /bin/bash

然后在该目录下进行操作

构建:

docker build -t centjava8:1.5 .

这里查看镜像我们就构建成功了

然后我们运行一下进行测试

docker run -it 8ee2ca29b609 /bin/bash

这里就是我们设置登录的时候进入的目录

这里就表明我们jdk安装的第一步成功

然后执行

vim test.txt

表示我们vim编辑器可以使用

然后执行

ifconfig

我们这里也可以查看到IP 表示成功

然后我们可以查看jdk版本

java -version

这里我们就可以看到 JDK 的版本了

表示我们 JDK 安装成功

基于Docker进行Zookeeper集群的安装

需要先部署jdk环境

这次通过手工部署的方式, 先上传jdk的tar包

[root@iz8vb6evwfagx3tyjx4fl8z soft]# ll
total 189496
-rw-r--r-- 1 root root 194042837 Apr  8 14:11 jdk-8u202-linux-x64.tar.gz

解压到指定目录

mkdir -p /opt/test/java
tar -zxvf jdk-8u202-linux-x64.tar.gz -C /opt/test/java

vim /etc/profile 修改环境变量添加jdk环境

JAVA_HOME=/opt/test/java/jdk1.8.0_202
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH

source /etc/profile 使配置生效

查看jdk版本

[root@iz8vb6evwfagx3tyjx4fl8z soft]# java -version
java version "1.8.0_202"
Java(TM) SE Runtime Environment (build 1.8.0_202-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)

搭建Zookeeper集群

先创建节点文件夹

cd /opt/test/
mkdir cluster/node01 -p && mkdir cluster/node02 -p && mkdir cluster/node03 -p

设定机器ip
```
machine_ip=121.89.209.190
```

运行节点1

docker run -d -p 2181:2181 -p 2887:2888 -p 3887:3888 --name zookeeper_node01 --restart always -v $PWD/cluster/node01/volume/data:/data -v $PWD/cluster/node01/volume/datalog:/datalog -e "TZ=Asia/Shanghai" -e "ZOO_MY_ID=1" -e "ZOO_SERVERS=server.1=0.0.0.0:2888:3888 server.2=$machine_ip:2888:3888 server.3=$machine_ip:2889:3889" zookeeper:3.4.13

运行节点2

docker run -d -p 2182:2181 -p 2888:2888 -p 3888:3888 --name zookeeper_node02 --restart always -v $PWD/cluster/node02/volume/data:/data -v $PWD/cluster/node2/volume/datalog:/datalog -e "TZ=Asia/Shanghai" -e "ZOO_MY_ID=2" -e "ZOO_SERVERS=server.1=$machine_ip:2887:3887 server.2=0.0.0.0:2888:3888 server.3=$machine_ip:2889:3889" zookeeper:3.4.13

运行节点3

docker run -d -p 2183:2181 -p 2889:2888 -p 3889:3888 --name zookeeper_node03 --restart always -v $PWD/cluster/node03/volume/data:/data -v $PWD/cluster/node03/volume/datalog:/datalog -e "TZ=Asia/Shanghai" -e "ZOO_MY_ID=3" -e "ZOO_SERVERS=server.1=$machine_ip:2887:3887 server.2=$machine_ip:2888:3888 server.3=0.0.0.0:2888:3888" zookeeper:3.4.13

查看docker镜像日志

docker logs -f 容器ID

然后你会发现在报连接错误

java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:558)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:534)
	at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:454)
	at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:435)
	at java.lang.Thread.run(Thread.java:748)
2020-04-08 16:00:44,614 [myid:1] - WARN  [RecvWorker:1:QuorumCnxManager$RecvWorker@1025] - Connection broken for id 1, my id = 1, error = 
java.io.EOFException

原因是默认的Docker网络模式下，通过宿主机的IP+映射端口, 而node01找不到node02和node03

查找每个容器的ip
```
docker inspect 容器ID
```
- node01: 172.17.0.2
- node02: 172.17.0.3
- node03: 172.17.0.4
我们知道了它有自己的IP，那又出现另一个问题了，就是它的ip是动态的，启动之前我们无法得知。有个解决办法就是创建自己的bridge网络，然后创建容器的时候指定ip。
所以以上全部要推倒重来......

停止并删除所有镜像

docker stop $(docker ps -a -q)
docker rm $(docker ps -a -q)

[重新开始]

创建自己的桥接网络

docker network create --driver bridge --subnet=172.18.0.0/16 --gateway=172.18.0.1 zoonet

查看docker网络

[root@iz8vb6evwfagx3tyjx4fl8z ~]# docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
a121ed854d1c        bridge              bridge              local
ab9083cbac8a        host                host                local
4d3012b89f70        none                null                local
26b8cbf5b4c9        zoonet              bridge              local

检查桥接网络

docker network inspect 26b8cbf5b4c9

查询结果

[
    {
        "Name": "zoonet",
        "Id": "26b8cbf5b4c9d086b81edc22f4627de5ef71a8745374554b440d394ad40858f4",
        "Created": "2020-04-08T16:25:00.982635799+08:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {},
        "Options": {},
        "Labels": {}
    }
]

修改Zookeeper容器的创建命令

运行节点1

docker run -d -p 2181:2181 --name zookeeper_node01 --privileged --restart always --network zoonet --ip 172.18.0.2 -v /opt/test/cluster/node01/volume/data:/data -v /opt/test/cluster/node01/volume/data/datalog:/datalog -v /opt/test/cluster/node01/volume/data/logs:/logs -e ZOO_MY_ID=1 -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888 server.2=172.18.0.3:2888:3888 server.3=172.18.0.4:2888:3888" 4ebfb9474e72 #(这个是Zookeeper镜像的ip)

运行节点2

docker run -d -p 2182:2181 --name zookeeper_node02 --privileged --restart always --network zoonet --ip 172.18.0.3 -v /opt/test/cluster/node02/volume/data:/data -v /opt/test/cluster/node02/volume/datalog:/datalog -v /opt/test/cluster/node02/volume/logs:/logs -e ZOO_MY_ID=2 -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888 server.2=172.18.0.3:2888:3888 server.3=172.18.0.4:2888:3888" 4ebfb9474e72

运行节点3

docker run -d -p 2183:2181 --name zookeeper_node03 --privileged --restart always --network zoonet --ip 172.18.0.4 -v /opt/test/cluster/node03/volume/data:/data -v /opt/test/cluster/node03/volume/datalog:/datalog -v /opt/test/cluster/node03/volume/logs:/logs -e ZOO_MY_ID=3 -e "ZOO_SERVERS=server.1=172.18.0.2:2888:3888 server.2=172.18.0.3:2888:3888 server.3=172.18.0.4:2888:3888" 4ebfb9474e72

查看容器

   [root@iz8vb6evwfagx3tyjx4fl8z ~]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS              PORTS                                        NAMES
82753d13ac44        4ebfb9474e72        "/docker-entrypoint.…"   21 seconds ago       Up 21 seconds       2888/tcp, 3888/tcp, 0.0.0.0:2183->2181/tcp   zookeeper_node03
eee56297eb96        4ebfb9474e72        "/docker-entrypoint.…"   42 seconds ago       Up 41 seconds       2888/tcp, 3888/tcp, 0.0.0.0:2182->2181/tcp   zookeeper_node02
ee8a9710fa3e        4ebfb9474e7         "/docker-entrypoint.…"   About a minute ago   Up About a minute   2888/tcp, 0.0.0.0:2181->2181/tcp, 3888/tcp   zookeeper_node01

这时候再查看容器日志
```
docker logs -f 容器ID
```
- 没有报错

这时候我们再进入容器检查一下

# node01
[root@iz8vb6evwfagx3tyjx4fl8z ~]# docker exec -it ee8a9710fa3e bash
bash-4.4# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Mode: follower

# node02
[root@iz8vb6evwfagx3tyjx4fl8z ~]# docker exec -it eee56297eb96  bash
bash-4.4# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Mode: leader

# node03
[root@iz8vb6evwfagx3tyjx4fl8z ~]# docker exec -it 82753d13ac44  bash
bash-4.4# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
Mode: follower

各节点状态良好, 集群搭建完成。

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