repair command in mongodb in docker container

Question

My client has mongodb running in docker container, one morning the db crashed and logs says "unclean shutdown detected". I tried for repairing mongodb but not able to do as it is running under docker container. The reason is that as i have to shutdown mongodb for running repair command and once i shutdown the mongodb then docker throws me out of the container because only one process was running and as it was stopped container was also stopped, now i am not able to run any mongod commands as i am out of container and container is stopped along with mongod instance.

So, can anyone help me out of this, how can i run repair command from outside of docker container ?

Can i run repair command without stopping mongod ?

Please help !!!

Thanks Irshad

Answer 1

The example command below fixed my issue with corrupted Wt files.

docker run -it -v <path>:/data/db <image-name> mongod --repair

Just replace path and image-name with yours

Answer 2

I had this same thing when my Mac decided to restart and install an update this morning, grr.

Normally my mongo container is started with a docker-compose up command, which uses a docker-compose.yml file for all the settings, something like...

version: "3"
services:
  mongo:
    image: mongo:3.6.12
    container_name: mongo
    ports:
     - 27017:27017
    volumes:
     - ~/mongo/data/db:/data/db
     - ~/mongo/db/configdb:/data/configdb

To run a basic docker command with those settings I did...

# Kill any existing mongo containers
docker rm mongo

# Repair the db
docker run -it -v ~/mongo/data/db:/data/db -v ~/mongo/db/configdb:/data/configdb --name mongo -d mongo:3.6.12  mongod --repair

# Has it finished the repair yet?
docker ps -a

After about a minute the container exited, the database was repaired and I was able to run mongo using docker-compose again.