I was working on testing and open source project that uses mongo and I noticed that when I re-create the container it is contaminated by prior actions, only deleting the machine gets me back to the pristine state that I need.
This is fully reproducible on my mac using toolbox 1.9.0
-
create a machine
docker-machine create -d virtualbox dashboard
eval “$(docker-machine env dashboard)” -
run the docker-compose file (see below)
docker-compose up -d -
Setup a user id on the db
mongo 192.168.99.109/admin --eval ‘db.getSiblingDB(“dashboard”).createUser({user: “db”, pwd: “dbpass”, roles: [{role: “readWrite”, db: “dashboard”}]})’
** This is the important part, notice the create id worked**
➜ Hygieia git:(collectors) ✗ mongo 192.168.99.102/admin --eval 'db.getSiblingDB(“dashboard”).createUser({user: “db”, pwd: “dbpass”, roles: [{role: “readWrite”, db: “dashboard”}]})'
MongoDB shell version: 3.0.7
connecting to: 192.168.99.109/admin
Successfully added user: {
-
“user” : “db”,*
-
“roles” : [*
-
{* -
"role" : "readWrite",* -
"db" : "dashboard"* -
}* -
]*
}docker-compose restart
- delete the container and then recreate it
docker-compose stop
docker-compose rm
docker-compose up -d
5. now try to create the id, we get an error it already exists! We expected this to succeen.
➜ mongotest git:(master) mongo 192.168.99.102/admin --eval 'db.getSiblingDB(“dashboard”).createUser({user: “db”, pwd: “dbpass”, roles: [{role: “readWrite”, db: “dashboard”}]})'
MongoDB shell version: 3.0.7
connecting to: 192.168.99.102/admin
2015-12-15T14:00:17.753-0800 E QUERY Error: couldn’t add user: User “db@dashboard” already exists
at Error ()
at DB.createUser (src/mongo/shell/db.js:1101:11)
at (shell eval):1:30 at src/mongo/shell/db.js:1101
6. if we delete the machine and start all over again this is fully reproducible.
➜ mongotest git:(master) cat docker-compose.yml
mongodb:
image: mongo:latest
container_name: mongodb
command: mongod --smallfiles
ports:
- "27017:27017"
volumes: - ./mongo:/data/db:rw
volume_driver: local