Implementation steps for installing java environment in docker

This article is based on Linux centos8 to install docker and then pull the image to install various environments (tomcat, mysql, redis, etc.)

Install Tomcat on Docker

Download tomcat (you can specify the version number. Here the latest version is installed by default. For example, docker pull tomcat:9.0.37 )

[root@localhost ~]# docker pull tomcat:9.0.37

start up

[root@localhost ~]# docker run -d -p 8080:8080 --name tomcat01 tomcat

After running the above, it is found that the container http://192.168.32.128:3355/ (my example) cannot be accessed. Please see the analysis below

(Some containers of Alibaba, such as the tomcat image, have an empty webapp folder in webapps.dist, so be sure to copy the webapps.dist file to the webapps directory), as shown in the figure

#Enter the container directory [root@localhost ~]# docker exec -it tomcat01 /bin/bash
#Switch to the webapps.dist folder root@77e211d23175:/usr/local/tomcat# cd webapps.dist
#Copy file root@77e211d23175:/usr/local/tomcat# cp -r webapps.dist/* webapps

Re-visit http://192.168.32.128:8080/ (note that the port number is docker's)

By the way, you can use the modified tomcat as a new container to avoid copying files next time (e8c58b381b99 is the tomcat container id)

[root@localhost ~]# docker commit -m="Improve the files that webapps should have" -a="Zhang Xiaoxiang" e8c58b381b99 tomcat01:9.0.37

Install Elasticsearch with Docker

Official installation method https://www.elastic.co/guide/en/elasticsearch/reference/7.5/docker.html

Download image

[root@localhost ~]# docker pull elasticsearch:7.9.0

To create a network, just give it a name, such as esnet

[root@localhost ~]# docker network create esnet

Single-node operation (no cluster configuration)

[root@localhost ~]# docker run -d --name elasticsearch --net esnet -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.9.0

Check whether it runs successfully (if it is still starting, it will report curl: (56) Recv failure: Connection reset by peer). Of course, you can also use a browser to test (note that the firewall is turned off)

[root@localhost ~]# curl localhost:9200

Startup successful return example

Docker installs mysql

Download image

[root@localhost dcoekrdata]# docker pull mysql:8.0.21

Run (-d background run, -v data mount -e environment configuration)

[root@localhost dcoekrdata]# docker run -d -p 3306:3306 -v /home/dockerdata/mysql/conf:/etc/mysql/conf.d -v /home/dockerdata/mysql/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=root --name root mysql:8.0.21

Just use Navicat to test it.

Docker installation of RocketMq

Note that this requires installing 3 images to be OK, refer to the document

https://www.jb51.net/article/202117.htm

1: Install mq

[root@localhost dcoekrdata]# docker pull rocketmqinc/rocketmq:4.3.2

Run MQ Server

docker run -d -p 9876:9876 -v /home/dockerdata/mq/namesrv/logs:/root/logs -v /home/dockerdata/mq/namesrv/store:/root/store --name rmqnamesrv -e "MAX_POSSIBLE_HEAP=100000000" rocketmqinc/rocketmq:4.3.2 sh mqnamesrv

2: Install broker

[root@localhost dcoekrdata]# docker pull rocketmqinc/rocketmq-broker:4.5.0-alpine-uid

Configuring the broker

[root@localhost dcoekrdata]# cd /home/dockerdata/mq
[root@localhost mq]# mkdir broker
[root@localhost mq]# cd broker/
[root@localhost broker]# touch broker.conf 
[root@localhost broker]# vi broker.conf

Configuration file (brokerIP1 = 192.168.32.128 is the public IP of the cloud server, or the IP of the Linux virtual machine. This article is just my example)

terName = DefaultCluster 
brokerName = broker-a 
brokerId = 0 
deleteWhen = 04 
fileReservedTime = 48 
brokerRole = ASYNC_MASTER 
flushDiskType = ASYNC_FLUSH 
brokerIP1 =192.168.32.128

Start the broker

docker run -d -p 10911:10911 -p 10909:10909 -v /home/dockerdata/mq/broker/logs:/root/logs -v /home/dockerdata/mq/broker/store:/root/store -v /home/dockerdata/mq/broker/broker.conf:/opt/rocketmq-4.3.2/conf/broker.conf --name rmqbroker --link rmqnamesrv:namesrv -e "NAMESRV_ADDR=namesrv:9876" -e "MAX_POSSIBLE_HEAP=200000000" rocketmqinc/rocketmq:4.3.2 sh mqbroker -c /opt/rocketmq-4.3.2/conf/broker.conf

3: Install the console rocketmq-console-ng

[root@localhost broker]# docker pull styletang/rocketmq-console-ng:1.0.0

Start the console ( note the IP address )

[root@localhost broker]# docker run -e "JAVA_OPTS=-Drocketmq.namesrv.addr=192.168.32.128:9876 -Dcom.rocketmq.sendMessageWithVIPChannel=false" -p 8080:8080 -t styletang/rocketmq-console-ng:1.0.0

The installation was successful, and the test was as shown in the figure

This is the end of this article about the implementation steps of installing the Java environment in Docker. For more relevant content about installing the Java environment in Docker, please search for previous articles on 123WORDPRESS.COM or continue to browse the following related articles. I hope you will support 123WORDPRESS.COM in the future!

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