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Restart Policies Docker Compose
There are mainly 4 different restart policies.
"no"
It means never attempt to restart the container if it stops or crashes.
All we have to do is to add restart: 'no'
in our docker-compose.yml file.
Remember to give single quotes
'no'
because in yaml file, if we giveno
without quotes, it is treated as false.
Sample code example
version: '3'services: redis-server: image: 'redis' node-app: restart: 'no' build: . ports: - "4001:8081"
always
If our container stops for any reason, always attempt to restart the stopped container.
All we have to do is to add restart: always
in docker-compose.yml file.
Sample code example
version: '3'services: redis-server: image: 'redis' node-app: restart: always build: . ports: - "4001:8081"
on-failure
Only restart the container, if it stops with an error code.
Error codes are non zero codes like 1, 2, 3, 4,....
Code 0 indicate there are no error and process is exited.
All we have to do is add restart: on-failure
to our docker-compose.yml file.
Sample code example
version: '3'services: redis-server: image: 'redis' node-app: restart: on-failure build: . ports: - "4001:8081"
unless-stopped
Always restart unless the developers forcibly stop the process.
All we have to do is add restart: unless-stopped
in docker-compose.yml file.
Sample code example
version: '3'services: redis-server: image: 'redis' node-app: restart: unless-stopped build: . ports: - "4001:8081"
Note : Always run docker-compose up --build
after making any changes to the .yml file, or any project directory file.
Docker
My Workplay on docker
Commands to remember :
docker run
:- runs a command in a new container .docker run = docker create + docker start
docker run -p <localhostport>:<containerport> <imagename/id>
:- running on portsdocker ps
:- to list all the running containersdocker ps --all
:- list all the container ever createddocker system prune
:- to delete all the containers ever created along with some other propertiesdocker logs <container-id>
:- to get the logsdocker start
:- start stopped containerdocker stop
:- stop the container - gets a sigterm message - terminate signaldocker kill
:- kills the container or stops the container instantlydocker exec -it <container id> <command>
:- Execute an additional command in container.-it
makes us to provide the input.-it equivalent to -i -t
docker exec -it <container id> sh
:- provides access to the terminal inside the
Original Link: https://dev.to/rohithv07/restart-policies-docker-compose-2c14
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