I want to use docker run a vm mongodb, at the same time, the mongo configure file use my own defined configure file to archive replication and open authentication.
Scanning some files but don't resolve the problem.
Any ideas?
The docker mongo image has a docker-entrypoint.sh it calls in the Dockerfile
Check if you can:
create your own image which would create the right user and restart mongo with authentication on: see "umputun/mongo-auth" and its init.sh script
or mount a createUser.js script in docker-entrypoint-initdb.d.
See "how to make a mongo docker container with auth"
Related
I'm trying to docker-containerize PostgreSQL server and this container will have many other applications as well. The need is that, PostgreSQL server data should be mapped to the host volume so that when container is stopped, we won't lose the data. Also that, the next time when we start the container, the same directory can be mapped again and postgres can use the old data. Below is the DOCKERFILE. Note that I'm using ubuntu 22.04 on the host.
FROM ubuntu:22.04
ENV DEBIAN_FRONTEND noninteractive
RUN apt install -y postgresql
ENTRYPOINT ["tail", "-f", "/dev/null"]
Docker image is built using the command
docker build -t pg_test .
and the container is run using the command
docker run --name test -v /home/me/data:/var/lib/postgresql/14/main pg_test
'/home/me/data' is the host directory which is empty where I want to map the postgres server data. '/var/lib/postgresql/14/main' is the directory inside the docker container where the postgres is supposed to store the data.
Once the docker container starts, I enter the docker container using the command
docker exec -it test bash
and once I'm inside, I'm trying to start the PostgreSQL service. But PostgreSQL fails to start as there is no data in '/var/lib/postgresql/14/main' directory. I understand that since I have mapped an empty host directory to '/var/lib/postgresql/14/main' directory, postgres doesn't have the files required to start.
I understand that I'm doing it the wrong way, but I couldn't find a way around it. Can anyone please help me to do this the right way, if there is one?
Any help would be appreciable.
You should use the postgres docker image, it will set up the db for you when you start the container, you can find instructions on https://hub.docker.com/_/postgres
If you must use a custom image, you will need to initialize the db yourself, usually by running initdb or whatever your system provides.
But really you should use the appropriate docker image, and if you need more services you start them in their own container and connect them to the postgres one
I've enabled automatic backups on Mongo Atlas.
Now I need to view and query a specific snapshot to check some documents?
How can I do it quickly and safely?
Go to Mongo Atlas console, click on your cluster, then go to Backup tab and download your snapshot:
You'll get a .tgz archive. It opens in a popup, so mind your blocker.
Unpack the archive, then run
docker run -it -p 27017:27017 -v /tmp/extracted/snapshot/dir:/data/db mongo
Now you can connect to the snapshot data using a mongo client like MongoDB Compas using default connection (localhost:27017).
The accepted answer did not work for me. Alternative approach:
Download the backup from your Atlas console and extract it.
Then run the following in your Terminal:
mongod --dbpath ~/Downloads/Cluster0-2020-11-20T15-53-03.006Z
Replacing Cluster0... with your extracted folder.
Now you can connect to the snapshot data using a mongo client like MongoDB Compass using default connection (localhost:27017).
You can also define a custom port with --port
I am working on golang project, recently I read about docker and try to use docker with my app. I am using mongoDB for database.
Now problem is that, I am creating Dockerfile to install all packages and compile and run the go project.
I am running mongo data as locally, if I am running go program without docker it gives me output, but if I am using docker for same project (just installing dependencies with this and running project), it compile successfully but not gives any output, having error::
CreateSession: no reachable servers
my Dockerfile::
# Start from a Debian image with the latest version of Go installed
# and a workspace (GOPATH) configured at /go.
FROM golang
WORKDIR $GOPATH/src/myapp
# Copy the local package files to the container's workspace.
ADD . /go/src/myapp
#Install dependencies
RUN go get ./...
# Build the installation command inside the container.
RUN go install myapp
# Run the outyet command by default when the container starts.
ENTRYPOINT /go/bin/myapp
# Document that the service listens on port 8080.
EXPOSE 8080
EXPOSE 27017
When you run your application inside Docker, it's running in a virtual environment; It's just like another computer but everything is virtual, including the network.
To connect your container to the host, Docker gives it an special ip address and give this ip an url with the value host.docker.internal.
So, assuming that mongo is running with binding on every interface on the host machine, from the container it could be reached with the connection string:
mongodb://host.docker.internal:21017/database
Simplifying, Just use host.docker.internal as your mongodb hostname.
In your golang project, how do you specify connection to mongodb? localhost:27017?
If you are using localhost in your code, your docker container will be the localhost and since you don't have mongodb in the same container, you'll get the error.
If you are starting your docker with command line docker run ... add --network="host". If you are using docker-compose, add network_mode: "host"
Ideally you would setup mongodo in it's own container and connect them from your docker-compose.yml -- but that's not what you are asking for. So, I won't go into that.
In future questions, please include relevant Dockerfile, docker-compose.yml to the extent possible. It will help us give more specific answer.
I'm currently working with Docker, I use mongo image for my DB container. For persistent storage, I mounted host machine's directory(e.g. /var/docker/data/db) to container(e.g. /data/db).
By now, whenever I wanted to run mongo shell and connect to my db I was doing these things:
Attach to running MongoDB container using docker exec -it <container> bash
Run mongo shell inside the container
Do some job
But I think it'll be much better if I could run mongod separately on the host machine, not in the container, and then connect to it even when the container is not running.
So is it possible to doing so? If I run two mongod process on the same directory(files), will there be an file access conflict?
If someone did similar kind of work, share me your experience please. Thanks.
I have created the karaf dockerfile from scratch and it works with my application. Now, the postgreSQL and the MongoDB containers need to be running on the same network as the karaf container for the final step. Essentially, what i have so far is three separate dockerfiles. And what i need is for them to be able to communicate with each other. How do i approach this?
Use docker network ls command firstly, it will show the networks exist in the machine.
Then run your MongoDB container and set --net param.
docker run --net karaf_default mongo
The mongo and karaf will be in the same network now. (you can check doc of --link)