Can anyone tell me where I am going wrong. All I am trying to do is name a Mongo database using docker compose.
I have a docker compose file that looks like this:
version: "3"
services:
mongo-db:
image: mongo
environment:
- MONGO_INITDB_ROOT_USERNAME=admin
- MONGO_INITDB_ROOT_PASSWORD=password
- MONGO_INITDB_DATABASE=mydbname
ports:
- 27017:27017
volumes:
- mongo-db:/data/db
volumes:
mongo-db:
I run docker docker-compose -f docker-compose.yml up -d --build and it runs. I then open Robo 3T and connect to my container but every time I do the database is called test and not mydbname. Any ideas? TIA
The environment variables are only used to create a new database if no database already exists. You map a volume to /data/db and that volume probably contains an existing database named 'test'.
Find the volume using docker volume ls. It's called something like <directory name>_mongo-db. Then delete it using docker volume rm <volume name>.
Now Docker will create a new, empty volume and Mongo will create a new database when you start the container. And it'll use the values from the environment variables.
Related
When I created volume in Docker using command:
docker volume create pg-data
Then I set up basic postgresql database from postgres image:
docker run --rm -v pg-data:/var/lib/postgresql/data --name pg-docker -e POSTGRES_PASSWORD=docker -p 5433:5432 postgres
Everything worked fine. Database persist and I can even access it directly from the host. I created several roles here like app_user_1.
Now then I wanted to spin up postgresql in container using docker-compose. I shutdown the above postgresql container beforehand.
There I have this settting:
version: '3.7'
services:
db:
image: postgres
volumes:
- pg-data:/var/lib/postgresql/data/
expose:
- 5432
restart: always
environment:
- POSTGRES_PASSWORD=docker
- POSTGRES_USER=postgres
web:
build: .
volumes:
- ./app:/app
ports:
- 8001:8000
environment:
- ENVIRONMENT=dev
- TESTING=0
depends_on:
- db
volumes:
pg-data:
However it seems that even though I mapped the same volume and used same env settings as in docker run command the postgresql instance in container created with docker-compose has no databases and no roles at all.
I get the following error:
psql: error: FATAL: role "postgres" does not exist
or
psql: error: FATAL: role "app_user_1" does not exist
So it seems it behaves as though as it is different instance of postgresql.
When I restarted the first container with docker run everything was there (all the databases and roles).
Any idea why this is happening? How can I reuse the databases from the first container in the docker-compose?
You need to define the volume you wish to use (the one you created manually with docker volume create as external to docker-compose as it was created externally
This is because the volumes created by docker-compose are 'internal' to it, so using ones created by just docker are 'external'. =)
Ref the offical docs at https://docs.docker.com/storage/volumes/#use-a-volume-with-docker-compose
The change to your compose file would be as follows:
...
volumes:
pg-data:
external: true
(Just that last line)
Hope that helps! =)
Additional Note
You can confirm this, by performing a docker volume ls | grep pg-data command which will list all volumes, then only show you the ones referencing 'pg-data'.
On my system where I was testing before I gave my answer, I get the following:
docker volume ls | grep pg-data
local pg-data
local postgresstackoverflow_pg-data
As you can see, the docker volume create one is listed first, as a local volume called 'pg-data', then the docker-compose.yml created one is next prefixed by the naming convention of docker-compose with the directory name that it was in at the time.
I am trying to figure out how to completely remove a docker container with a postgres database and rebuild using docker-compose?
I created a server and database container using docker-compose. The database did not get set up how I wanted, so I would like to remove the database and rebuild. I assumed the easiest solution, given it is brand new would be to stop the container from running, remove the container and then run docker-compose again.
I have followed those steps, do not see any of the containers. I do not see any volumes associated with the containers. However, when I run docker-compose it appears to be using the postgres database that was previously created?
Here is what my docker-compose files consists of with user/password/db name extracted.
services:
server:
image: "node:10"
user: "node"
working_dir: /home/node/app
volumes:
- ./:/home/node/app
ports:
- 3030:3030
command: "npm start"
depends_on:
- db
db:
image: postgres:latest
restart: always
environment:
POSTGRES_USER: [user]
POSTGRES_PASSWORD: [password]
POSTGRES_DB: [db_name]
volumes:
- ./data/postgres:/var/lib/postgresql/data
I expected that by using:
docker stop [container] to stop the container, then
docker rm [container] to remove the container
I could rebuild fresh with docker-compose up
You can list the volumes used by docker with this command:
docker volume ls
Then, if needed, you can inspect the volumes to find which one your database uses:
docker volume inspect xyzvolumename
After locating the volume used by your database, delete it for a fresh start:
docker volume rm locatedvolumename
Docker stop and docker rm will not work untill you remove bind mount volume from your docker-compose.
Remove this from your docker-compose
- ./data/postgres:/var/lib/postgresql/data
or delete everything from host directory inside
./data/postgres
I create an Dockerfile with Postgresql with this code:
FROM postgres:9.4
MAINTAINER Fabio Ebner
ENV POSTGRES_PASSWORD="dna44100"
ENV POSTGRES_PORT=5432
EXPOSE ${POSTGRES_PORT}
COPY init.sql /docker-entrypoint-initdb.d/
so How can I specify to always save my db data in my user Machine? cause with this code everty time I stop the container my data are lost
You will need to mount a volume. pointing your host machine to the container's directory /var/lib/postgresql
Source: docker mounting volumes on host
You need to mount a volume to the data directory of PostgreSQL.
You can use the following, using the docker-compose file:
version: "3"
services:
test-postgresql:
image: postgres:9.4
container_name: test-postgresql
ports:
- "5432:5432"
environment:
POSTGRES_PASSWORD: dna44100
volumes:
- ./init.sql:/docker-entrypoint-initdb.d/init.sql
- ./folder-on-host:/var/lib/postgresql/data
With the docker-compose file you can start the container with docker-compose up and stop the container with docker-compose down. The database and settings are saved on the specified directory (./folder-on-host).
If you want to remove the volume you can use the command: docker-compose down -v
You can also use the docker run to mount a volume, using the -v or -volume option:
docker run -v ./folder-on-host:/var/lib/postgresql/data yourimagename
New to Docker and I'm trying to set Postgres and pgadmin4 to run as a single service on docker for Mac inside a virtual machine. Everything works but as soon as I stop the service my data is gone. I'm using a named volume to persist data but probably doing something wrong. What is it?
Here's my setup:
# create my VM
docker-machine create dbvm
# set the right environment
eval $(docker-machine env dbvm)
Here's my docker-compose.yaml file:
version: '3'
services:
db:
image: postgres
environment:
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=postgres
- POSTGRES_DB=my_db
volumes:
- pgdata:/pgdata
ports:
- 5432:5432
pgadmin:
image: fenglc/pgadmin4
ports:
- 5050:5050
volumes:
- pgadmindata:/pgadmindata
volumes:
pgdata:
pgadmindata:
With docker-compose.yaml, I run:
docker stack deploy -c docker-compose.yaml dbstack
I can do everything on this setup, but if I run docker stack rm dbstack the data is gone after this, but the volumes still exist.
$ docker volume ls
DRIVER VOLUME NAME
local 0c15b0b22c6b850e8768c14045da166253424dda4df8d2e13df75fd54d833412
local 22bab81d9d1de0e07de97363596b096f944752eba617ff574a0ab525239227f5
local 6da6e29fb98ad0f66d7da6a75dc76066ce014b26ea43567c55ed318fda707105
local dbstack_pgadmindata
local dbstack_pgdata
What am I missing?
Unless you have it in some config not shown, I believe you need to map to the default data location inside the container e.g., pgdata:/var/lib/postgresql/data
#Idg is partially correct. postgres data lives at /var/lib/postgresql/data per the Docker Hub readme.
But for it to work in your named volume, you can't use a path on the left side, so correct value would be:
volumes:
- pgdata:/var/lib/postgresql/data
Then the postgres data will stay in that named volume, on the node it was created on.
I'm using docker compose to run tests for my application. The configuration looks like:
version: '2'
services:
web:
build: .
image: myapp:web
ports:
- "3000:3000"
depends_on:
- mongo
links:
- mongo
mongo:
image: mongo:3.2.6
Right now, when I run docker-compose up, there is a volume created automatically (by docker-compose or the mongo image?) which maps the Mongo storage data to path like: /var/lib/docker/volumes/c297a1c91728cb225a13d6dc1e37621f966067c1503511545d0110025479ea65/_data.
Since I am running tests rather than production code, I'd actually like to avoid this persistence (the mongo data should go away when the docker-compose exits) -- is this possible? If so, what's the best way to do it?
After the containers exit (or you stop them with a down command), clean up the old containers and volumes with
docker-compose rm -v
The -v tells it to also remove the volumes (container volumes and named volumes created with docker-compose, but not host volumes).