Losing all modification when container is restarted with Docker Compose - docker

Question

i'm using docker docker-compose for running web application. I want to change inside my container and modify some config file and restarting the container without losing modification .
I'm creating a container using
sudo docker-compose up
Then i run
sudo -it -u 0 <container-id> bash
After changing in config files everything looks good. If I restart the container executing
docker container restart $(docker ps -a -q)
all changes where discarded. Can someone explain to me the best way for doing this without losing modifications after restart ?

Answer 1

A useful technique here is to store a copy of the configuration files on the host and then inject them using a Docker-Compose volumes: directive.
version: '3'
services:
myapp:
image: me/myapp
ports: ['8080:8080']
volumes:
- './myapp.ini:/app/myapp.ini'
It is fairly routine to destroy and recreate containers, and you want things to be set up so that everything is ready to go immediately once you docker run or docker-compose up.
Other good uses of bind-mounted directories like this are to give a container a place to publish log files back out, and if your container happens to need persistent data on a filesystem, giving a place to store that across container runs.
docker exec is a useful debugging tool, but it is not intended to be part of your core Docker workflow.

Answer 2

thanks #David Maze for your reply in my case i have à script for changing many parameters in my app and generating ssl certificat after execution of script in my container i have to restart the contianer
my docker-compose.yml
version: '2.3'
services:
wso2iot-mysql:
image: mysql:5.7.20
container_name: wso2iot-mysql
hostname: wso2iot-mysql
ports:
- 3306
environment:
MYSQL_ROOT_PASSWORD: root
volumes:
- ./mysql/scripts:/docker-entrypoint-initdb.d
healthcheck:
test: ["CMD", "mysqladmin" ,"ping", "-uroot", "-proot"]
interval: 10s
timeout: 60s
retries: 5
wso2iot-broker:
image: docker.wso2.com/wso2iot-broker:3.3.0
container_name: wso2iot-broker
hostname: wso2iot-broker
ports:
- "9446:9446"
- "5675:5675"
healthcheck:
test: ["CMD", "nc", "-z", "localhost", "9446"]
interval: 10s
timeout: 120s
retries: 5
depends_on:
wso2iot-mysql:
condition: service_healthy
volumes:
- ./broker:/home/wso2carbon/volumes/wso2/broker
wso2iot-analytics:
image: docker.wso2.com/wso2iot-analytics:3.3.0
container_name: wso2iot-analytics
hostname: wso2iot-analytics
healthcheck:
test: ["CMD", "curl", "-k", "-f", "https://localhost:9445/carbon/admin/login.jsp"]
interval: 10s
timeout: 120s
retries: 5
depends_on:
wso2iot-mysql:
condition: service_healthy
volumes:
- ./analytics:/home/wso2carbon/volumes/wso2/analytics
ports:
- "9445:9445"
wso2iot-server:
image: docker.wso2.com/wso2iot-server:3.3.0
container_name: wso2iot-server
hostname: wso2iot-server
healthcheck:
test: ["CMD", "curl", "-k", "-f", "https://localhost:9443/carbon/admin/login.jsp"]
interval: 10s
timeout: 120s
retries: 5
depends_on:
wso2iot-mysql:
condition: service_healthy
volumes:
- ./iot-server:/home/wso2carbon/volumes
ports:
- "9443:9443"
links:
- wso2iot-mysql