Implementation of modifying configuration files in Docker container

1. Enter the container

docker run [option] image name [command passed to the startup container]

Description of common optional parameters:

• -i means running the container in "interactive mode"
• -t means that the container will enter its command line after it starts. After adding these two parameters, you can log in to the container after it is created. That is, allocate a pseudo terminal.
• --name Name the created container
• -v indicates the directory mapping relationship (the former is the host directory, and the latter is the directory mapped to the host, that is, host directory: directory in the container). Multiple -v can be used to map multiple directories or files. Note: It is best to do directory mapping, make changes on the host machine, and then share it to the container.
• -d If you add the -d parameter after run, a guarded container will be created and run in the background (in this way, you will not automatically log in to the container after creating it. If you only add the -i -t parameters, you will automatically enter the container after creation).
• -p means port mapping. The former is the host port and the latter is the mapping port in the container. You can use multiple -p to map multiple ports.
• -e sets environment variables for the container
• --network=host means mapping the host's network environment to the container, and the container's network is the same as the host's

2. Find the configuration file

# Display file ls
The results are as follows:
LICENSE.txt README.textile config lib modules
NOTICE.txt bin data logs plugins
 
# Enter the configuration folder cd config
 
# Display file ls
The results are as follows:
elasticsearch.keystore ingest-geoip log4j2.properties roles.yml users_roles
elasticsearch.yml jvm.options role_mapping.yml users
 
# Modify the configuration file vi elasticsearch.yml

When using the docker container, Vi may not be installed. apt-get install vim . If it prompts: Unable to locate package vim, you need to type: apt-get update update. After the update is complete, type the command: apt-get install vim

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