I'm working with docker-compose.
My docker-compose.yml looks like
redis:
image: redis
expose:
- "6379"
volumes:
- ./redis:/data
nerdzcrush:
image: nerdzeu/docker-nerdzcrush
ports:
- "8181:81"
links:
- redis
volumes:
- ./mediacrush:/home/mediacrush
When I run docker-compose up everything works fine.
After that, I needed to change the mount path.
I stopped the containers with docker-compose stop, I changed my docker-compose.yml in this way:
redis:
image: redis
expose:
- "6379"
volumes:
- ./nerdzcrush/redis:/data
nerdzcrush:
image: nerdzeu/docker-nerdzcrush
ports:
- "8181:81"
links:
- redis
volumes:
- ./nerdzcrush/mediacrush:/home/mediacrush
And I removed the old directories with
sudo rm -rf ./mediacrush ./redis
After that, I started the containers wiht docker-compose up -d
I expect that the containers start to work with the new path, but I see that the old path are used. Thus I have again ./mediacrush and ./redis in my folder.
That's something I understood wrongly about docker-compose or that's an issue with docker-compose?
I'm using docker-compose version: 1.5.0dev
Thank you
It's only supposed to preserve volumes if they are container data volumes (not host volumes like in your case).
I would try running docker-compose rm to remove the containers (after stopping them). After that the up should use the correct path.
Related
I am using docker-compose and here is my docker-compose.yaml file:
version: "3.7"
services:
node:
container_name: my-app
image: my-app
build:
context: ./my-app-directoty
dockerfile: Dockerfile
command: npm run dev
environment:
MONGO_URL: my-database
port: 3000
volumes:
- ./my-app-directory/src:/app/src
- ./my-app-directory/node_modules:/app/node_modules
ports:
- "3000:3000"
networks:
- my-app-network
depends_on:
- my-database
my-database:
container_name: my-database
image: mongo
ports:
- "27017:27017"
networks:
- my-app-network
networks:
my-app-network:
driver: bridge
I expect to find a clear and newly created database each time I run the following command:
docker-compose build
docker-compose up
But this is not the case. When I bring the containers up with docker-compose up, my database has the exact state of the last time I shut it down with docker-compose down command. And since I have not specified a volume prop in my-database object, is this normal behaviour? Does this mean that no other action to persisting database state is required? And can I use this in production if I ever choose to use docker-compose?
The mongo image define the following volumes:
/data/configdb
/data/db
So docker-volume will create and use a unamed volume for data/db.
If you want to have a new one, use:
docker-compose down -v
docker-compose up -d --build
Or use a mount point mounted on the volume location like:
volumes:
- ./db:/data/db:rw
And drop your local db directories when you want to start over.
I have got following compose file where i'm sharing some generated html data from Jenkins container to the host drive and reading this data by Nginx container from the host drive. I'm using Ubuntu Server 18.04 on AWS.
The problem is that I can read contents of the jenkins/workspace/allure-report only once. After updating of the html data it becomes inaccessible for Nginx and it throws 403 status code.
I tried all the possible solutions but nothing works. The only ugly solution is to restart Nginx container after every html data updating. I don't like this way and looking for some inbuilt docker features to resolve this.
What didn't help: sharing volume straight between containers without using docker host drive, using rslave option, using docker separate volume that can be used as buffer between the two containers... I believe it should be much more easier!
version: '2'
services:
jenkins:
container_name: jenkins
image: "jenkins/jenkins"
ports:
- "8088:8080"
- "50000:50000"
env_file:
- variables.env
volumes:
- ./jenkins:/var/jenkins_home
selenoid:
container_name: selenoid
network_mode: bridge
image: "aerokube/selenoid"
# default directory for browsers.json is /etc/selenoid/
command: -listen :4444 -conf /etc/selenoid/browsers.json -video-output-dir /opt/selenoid/video/ -timeout 3m
ports:
- "4444:4444"
env_file:
- variables.env
volumes:
- $PWD:/etc/selenoid/ # assumed current dir contains browsers.json
- /var/run/docker.sock:/var/run/docker.sock
selenoid-ui:
container_name: selenoid-ui
network_mode: bridge
image: "aerokube/selenoid-ui"
links:
- selenoid
ports:
- "8080:8080"
env_file:
- variables.env
command: ["--selenoid-uri", "http://selenoid:4444"]
nginx:
container_name: nginx
image: "nginx"
ports:
- "80:80"
volumes:
- ./jenkins/workspace/allure-report:/usr/share/nginx/html:ro,rslave
Found the solution: the easiest way to get access to the dynamic data is to use volumes_from in that container you want to look from.
When I configured my compose file like that I faced another issue - the 403 status has gone but the data was static. But that was my fault, I didn't use "cp -r " command correctly so my data has been copied only once.
Docker doesn't use the latest code after running git checkout <non_master_branch>, while I can see it in the vscode.
I am using the following docker-compose file:
version: '2'
volumes:
pgdata:
backend_app:
services:
nginx:
container_name: nginx-angular-dev
image: nginx-angular-dev
build:
context: ./frontend
dockerfile: /.docker/nginx.dockerfile
ports:
- "80:80"
- "443:443"
depends_on:
- web
web:
container_name: django-app-dev
image: django-app-dev
build:
context: ./backend
dockerfile: /django.dockerfile
command: ["./wait-for-postgres.sh", "db", "./django-entrypoint.sh"]
volumes:
- backend_app:/code
ports:
- "8000:8000"
depends_on:
- db
env_file: .env
environment:
FRONTEND_BASE_URL: http://192.168.99.100/
BACKEND_BASE_URL: http://192.168.99.100/api/
MODE_ENV: DOCKER_DEV
db:
container_name: django-db
image: postgres:10
env_file: .env
volumes:
- pgdata:/var/lib/postgresql/data
I have tried docker-compose build --no-cache, followed by docker-compose up --force-recreate but it didn't solve the problem.
What is the root of my problem?
Your volumes: are causing problems. Docker volumes aren't intended to hold code, and you should delete the volume declarations that mention backend_app:.
Your docker-compose.yml file says in part:
volumes:
backend_app:
services:
web:
volumes:
- backend_app:/code
backend_app is a named volume: it keeps data that must be persisted across container runs. If the volume doesn't exist yet the first time then data will be copied into it from the image, but after that, Docker considers it to contain critical user data that must not be updated.
If you keep code or libraries in a Docker volume, Docker will never update it, even if the underlying image changes. This is a common problem in JavaScript applications that mount an anonymous volume on their node_modules directory.
As a temporary workaround, if you docker-compose down -v, it will delete all of the volumes, including the one with your code in it, and the next time you start it will get recreated from the image.
The best solution is to simply not use a volume here at all. Delete the lines above from your docker-compose.yml file. Develop and test your application in a non-Docker environment, and when you're ready to do integration testing, run docker-compose up --build. Your code will live in the image, and an ordinary docker build will produce a new image with new code.
I'm running this on debian 9
I'm using sudo docker volume create db to create a volume I'm using in my docker-compose.yml. But I still get the error db_1_d89b59353579 | mkdir: cannot create directory '/var/lib/mysql': Permission denied.
How can I set permissions for the user using that volume. And how to get the user?
Docker-Compose:
version: '2'
volumes:
nextcloud:
db:
services:
db:
image: mariadb
command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
restart: always
volumes:
- db:/var/lib/mysql:z
environment:
- MYSQL_ROOT_PASSWORD=***
- MYSQL_PASSWORD=***
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud
app:
image: nextcloud
ports:
- 8080:80
links:
- db
volumes:
- nextcloud:/var/www/html
restart: always
I got an install.sh file where I run:
...
sudo docker volume create db
sudo docker-compose build
docker-compose up -d
Try to first change the mounts to local folders and see if that fixes your issue:
version: '2'
volumes:
nextcloud:
db:
services:
db:
...
volumes:
- ./db:/var/lib/mysql
environment:
- MYSQL_ROOT_PASSWORD=***
- MYSQL_PASSWORD=***
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud
app:
...
volumes:
- ./nextcloud:/var/www/html
restart: always
If that does then check that the volumes are correctly removed by docker-compose down. Run docker volume ls. If they still persist then remove them by hand and rerun your containers with the volumes.
Regarding the difference between mounting to a volume (db:/var/lib/mysql) and mounting to a host path (./db:/var/lib/mysql):
In the first case it is a volume managed by Docker. It is meant for persistence but getting to the files is a bit more tricky. In the second case it is a path on the host and it makes it a lot easier to retrieve persisted files. I recommend to run "docker-compose config" for both situations and see the difference in how docker-compose internally transforms the statement.
I am new to docker and developing a project using docker compose. From the documentation I have learned that I should be using data only containers to keep data persistant but I am unable to do so using docker-compose.
Whenever I do docker-compose down it removes the the data from db but by doing docker-compose stop the data is not removed. May be this is because that I am not creating named data volume and docker-compose down hardly removes all the containers. So I tried naming the container but it threw me errors.
Please have a look at my yml file:
version: '2'
services:
data_container:
build: ./data
#volumes:
# - dataVolume:/data
db:
build: ./db
ports:
- "5445:5432"
environment:
- POSTGRES_USER=postgres
- POSTGRES_DB=postgres
# - PGDATA=/var/lib/postgresql/data/pgdata
volumes_from:
# - container:db_bus
- data_container
geoserver:
build: ./geoserver
depends_on:
- db
ports:
- "8004:8080"
volumes:
- ./geoserver/data:/opt/geoserverdata_dir
web:
build: ./web
volumes:
- ./web:/code
ports:
- "8000:8000"
depends_on:
- db
command: python manage.py runserver 0.0.0.0:8000
nginx:
build: ./nginx
ports:
- "83:80"
depends_on:
- web
The Docker file for the data_container is:
FROM stackbrew/busybox:latest
MAINTAINER Tom Offermann <tom#offermann.us>
# Create data directory
RUN mkdir /data
# Create /data volume
VOLUME /data
I tried this but by doing docker-compose down, the data is lost. I tried naming the data_container as you can see the commented line, it threw me this error:
ERROR: Named volume "dataVolume:/data:rw" is used in service "data_container" but no declaration was found in the volumes section.
So right now what I am doing is I created a stand alone data only named container and put that in the volumes_from value of the db. It worked fine and didn't remove any data even after doing docker-compose down.
My queries:
What is the best approach to make containers that can store database's data using the docker-compose and to use them properly ?
My conscious is not agreeing with me on approach that I have opted, the one by creating a stand alone data container. Any thoughts?
docker-compose down
does the following
Stops containers and removes containers, networks, volumes, and images
created by up
So the behaviour you are experiencing is expected.
Use docker-compose stop to shutdown containers created with the docker-compose file but not remove their volumes.
Secondly you don't need the data-container pattern in version 2 of docker compose. So remove that and just use
db:
...
volumes:
- /var/lib/postgresql/data
docker-compose down stops containers but also removes them (with everything: networks, ...).
Use docker-compose stop instead.
I think the best approach to make containers that can store database's data with docker-compose is to use named volumes:
version: '2'
services:
db: #https://hub.docker.com/_/mysql/
image: mysql
volumes:
- "wp-db:/var/lib/mysql:rw"
env_file:
- "./conf/db/mysql.env"
volumes:
wp-db: {}
Here, it will create a named volume called "wp-db" (if it doesn't exist) and mount it in /var/lib/mysql (in read-write mode, the default). This is where the database stores its data (for the mysql image).
If the named volume already exists, it will be used without creating it.
When starting, the mysql image look if there are databases in /var/lib/mysql (your volume) in order to use them.
You can have more information with the docker-compose file reference here:
https://docs.docker.com/compose/compose-file/#/volumes-volume-driver
To store database data make sure your docker-compose.yml will look like
if you want to use Dockerfile
version: '3.1'
services:
php:
build:
context: .
dockerfile: Dockerfile
ports:
- 80:80
volumes:
- ./src:/var/www/html/
db:
image: mysql
command: --default-authentication-plugin=mysql_native_password
restart: always
environment:
MYSQL_ROOT_PASSWORD: example
volumes:
- mysql-data:/var/lib/mysql
adminer:
image: adminer
restart: always
ports:
- 8080:8080
volumes:
mysql-data:
your docker-compose.yml will looks like
if you want to use your image instead of Dockerfile
version: '3.1'
services:
php:
image: php:7.4-apache
ports:
- 80:80
volumes:
- ./src:/var/www/html/
db:
image: mysql
command: --default-authentication-plugin=mysql_native_password
restart: always
environment:
MYSQL_ROOT_PASSWORD: example
volumes:
- mysql-data:/var/lib/mysql
adminer:
image: adminer
restart: always
ports:
- 8080:8080
volumes:
if you want to store or preserve data of mysql then
must remember to add two lines in your docker-compose.yml
volumes:
- mysql-data:/var/lib/mysql
and
volumes:
mysql-data:
after that use this command
docker-compose up -d
now your data will persistent and will not be deleted even after using this command
docker-compose down
extra:- but if you want to delete all data then you will use
docker-compose down -v
to verify or check database data list by using this command
docker volume ls
DRIVER VOLUME NAME
local 35c819179d883cf8a4355ae2ce391844fcaa534cb71dc9a3fd5c6a4ed862b0d4
local 133db2cc48919575fc35457d104cb126b1e7eb3792b8e69249c1cfd20826aac4
local 483d7b8fe09d9e96b483295c6e7e4a9d58443b2321e0862818159ba8cf0e1d39
local 725aa19ad0e864688788576c5f46e1f62dfc8cdf154f243d68fa186da04bc5ec
local de265ce8fc271fc0ae49850650f9d3bf0492b6f58162698c26fce35694e6231c
local phphelloworld_mysql-data