# on 0.4.x+
sudo dokku plugin:install https://github.com/dokku/dokku-mongo.git mongo

# create a mongo service named lolipop
dokku mongo:create lolipop

# you can also specify the image and image
# version to use for the service
# it *must* be compatible with the
# official mongo image
export MONGO_IMAGE="mongo"
export MONGO_IMAGE_VERSION="3.0.5"
dokku mongo:create lolipop

# you can also specify custom environment
# variables to start the mongo service
# in semi-colon separated form
export MONGO_CUSTOM_ENV="USER=alpha;HOST=beta"
dokku mongo:create lolipop

# by default we use the wiredTiger storage solution
# if you are using an image version less than 3.x
# you will need to set a custom MONGO_CONFIG_OPTIONS
# environment variable
export MONGO_CONFIG_OPTIONS=" --auth "
export MONGO_IMAGE_VERSION="2.6.11"
dokku mongo:create lolipop

# get connection information as follows
dokku mongo:info lolipop

# you can also retrieve a specific piece of service info via flags
dokku mongo:info lolipop --config-dir
dokku mongo:info lolipop --data-dir
dokku mongo:info lolipop --dsn
dokku mongo:info lolipop --exposed-ports
dokku mongo:info lolipop --id
dokku mongo:info lolipop --internal-ip
dokku mongo:info lolipop --links
dokku mongo:info lolipop --service-root
dokku mongo:info lolipop --status
dokku mongo:info lolipop --version

# a bash prompt can be opened against a running service
# filesystem changes will not be saved to disk
dokku mongo:enter lolipop

# you may also run a command directly against the service
# filesystem changes will not be saved to disk
dokku mongo:enter lolipop ls -lah /

# a mongo service can be linked to a
# container this will use native docker
# links via the docker-options plugin
# here we link it to our 'playground' app
# NOTE: this will restart your app
dokku mongo:link lolipop playground

# the following environment variables will be set automatically by docker (not
# on the app itself, so they won’t be listed when calling dokku config)
#
#   DOKKU_MONGO_LOLIPOP_NAME=/lolipop/DATABASE
#   DOKKU_MONGO_LOLIPOP_PORT=tcp://172.17.0.1:27017
#   DOKKU_MONGO_LOLIPOP_PORT_27017_TCP=tcp://172.17.0.1:27017
#   DOKKU_MONGO_LOLIPOP_PORT_27017_TCP_PROTO=tcp
#   DOKKU_MONGO_LOLIPOP_PORT_27017_TCP_PORT=27017
#   DOKKU_MONGO_LOLIPOP_PORT_27017_TCP_ADDR=172.17.0.1
#
# and the following will be set on the linked application by default
#
#   MONGO_URL=mongodb://lolipop:SOME_PASSWORD@dokku-mongo-lolipop:27017/lolipop
#
# NOTE: the host exposed here only works internally in docker containers. If
# you want your container to be reachable from outside, you should use `expose`.

# another service can be linked to your app
dokku mongo:link other_service playground

# since DATABASE_URL is already in use, another environment variable will be
# generated automatically
#
#   DOKKU_MONGO_BLUE_URL=mongodb://other_service:ANOTHER_PASSWORD@dokku-mongo-other-service:27017/other_service

# you can then promote the new service to be the primary one
# NOTE: this will restart your app
dokku mongo:promote other_service playground

# this will replace MONGO_URL with the url from other_service and generate
# another environment variable to hold the previous value if necessary.
# you could end up with the following for example:
#
#   MONGO_URL=mongodb://other_service:ANOTHER_PASSWORD@dokku-mongo-other-service:27017/other_service
#   DOKKU_MONGO_BLUE_URL=mongodb://other_service:ANOTHER_PASSWORD@dokku-mongo-other-service:27017/other_service
#   DOKKU_MONGO_SILVER_URL=mongodb://lolipop:SOME_PASSWORD@dokku-mongo-lolipop:27017/lolipop

# you can also unlink a mongo service
# NOTE: this will restart your app and unset related environment variables
dokku mongo:unlink lolipop playground

# you can tail logs for a particular service
dokku mongo:logs lolipop
dokku mongo:logs lolipop -t # to tail

# you can dump the database
dokku mongo:export lolipop > lolipop.dump.gz

# you can import a dump
dokku mongo:import lolipop < database.dump.gz

# you can clone an existing database to a new one
dokku mongo:clone lolipop new_database

# finally, you can destroy the container
dokku mongo:destroy lolipop