dokku rethinkdb

Official rethinkdb plugin for dokku. Currently defaults to installing rethinkdb 2.4.2.

Requirements

• dokku 0.19.x+
• docker 1.8.x

Installation

# on 0.19.x+
sudo dokku plugin:install https://github.com/dokku/dokku-rethinkdb.git rethinkdb

Commands

rethinkdb:app-links <app>                          # list all rethinkdb service links for a given app
rethinkdb:connect <service>                        # connect to the service via the rethinkdb connection tool
rethinkdb:create <service> [--create-flags...]     # create a rethinkdb service
rethinkdb:destroy <service> [-f|--force]           # delete the rethinkdb service/data/container if there are no links left
rethinkdb:enter <service>                          # enter or run a command in a running rethinkdb service container
rethinkdb:exists <service>                         # check if the rethinkdb service exists
rethinkdb:expose <service> <ports...>              # expose a rethinkdb service on custom host:port if provided (random port on the 0.0.0.0 interface if otherwise unspecified)
rethinkdb:info <service> [--single-info-flag]      # print the service information
rethinkdb:link <service> <app> [--link-flags...]   # link the rethinkdb service to the app
rethinkdb:linked <service> <app>                   # check if the rethinkdb service is linked to an app
rethinkdb:links <service>                          # list all apps linked to the rethinkdb service
rethinkdb:list                                     # list all rethinkdb services
rethinkdb:logs <service> [-t|--tail] <tail-num-optional> # print the most recent log(s) for this service
rethinkdb:promote <service> <app>                  # promote service <service> as RETHINKDB_URL in <app>
rethinkdb:restart <service>                        # graceful shutdown and restart of the rethinkdb service container
rethinkdb:start <service>                          # start a previously stopped rethinkdb service
rethinkdb:stop <service>                           # stop a running rethinkdb service
rethinkdb:unexpose <service>                       # unexpose a previously exposed rethinkdb service
rethinkdb:unlink <service> <app>                   # unlink the rethinkdb service from the app
rethinkdb:upgrade <service> [--upgrade-flags...]   # upgrade service <service> to the specified versions

Usage

Help for any commands can be displayed by specifying the command as an argument to rethinkdb:help. Plugin help output in conjunction with any files in the docs/ folder is used to generate the plugin documentation. Please consult the rethinkdb:help command for any undocumented commands.

Basic Usage

create a rethinkdb service

# usage
dokku rethinkdb:create <service> [--create-flags...]

flags:

• -c|--config-options "--args --go=here": extra arguments to pass to the container create command (default: None)
• -C|--custom-env "USER=alpha;HOST=beta": semi-colon delimited environment variables to start the service with
• -i|--image IMAGE: the image name to start the service with
• -I|--image-version IMAGE_VERSION: the image version to start the service with
• -m|--memory MEMORY: container memory limit in megabytes (default: unlimited)
• -p|--password PASSWORD: override the user-level service password
• -r|--root-password PASSWORD: override the root-level service password
• -s|--shm-size SHM_SIZE: override shared memory size for rethinkdb docker container

Create a rethinkdb service named lollipop:

dokku rethinkdb:create lollipop

You can also specify the image and image version to use for the service. It must be compatible with the rethinkdb image.

export RETHINKDB_IMAGE="rethinkdb"
export RETHINKDB_IMAGE_VERSION="${PLUGIN_IMAGE_VERSION}"
dokku rethinkdb:create lollipop

You can also specify custom environment variables to start the rethinkdb service in semi-colon separated form.

export RETHINKDB_CUSTOM_ENV="USER=alpha;HOST=beta"
dokku rethinkdb:create lollipop

print the service information

# usage
dokku rethinkdb:info <service> [--single-info-flag]

flags:

• --config-dir: show the service configuration directory
• --data-dir: show the service data directory
• --dsn: show the service DSN
• --exposed-ports: show service exposed ports
• --id: show the service container id
• --internal-ip: show the service internal ip
• --links: show the service app links
• --service-root: show the service root directory
• --status: show the service running status
• --version: show the service image version

Get connection information as follows:

dokku rethinkdb:info lollipop

You can also retrieve a specific piece of service info via flags:

dokku rethinkdb:info lollipop --config-dir
dokku rethinkdb:info lollipop --data-dir
dokku rethinkdb:info lollipop --dsn
dokku rethinkdb:info lollipop --exposed-ports
dokku rethinkdb:info lollipop --id
dokku rethinkdb:info lollipop --internal-ip
dokku rethinkdb:info lollipop --links
dokku rethinkdb:info lollipop --service-root
dokku rethinkdb:info lollipop --status
dokku rethinkdb:info lollipop --version

list all rethinkdb services

# usage
dokku rethinkdb:list 

List all services:

dokku rethinkdb:list

print the most recent log(s) for this service

# usage
dokku rethinkdb:logs <service> [-t|--tail] <tail-num-optional>

flags:

• -t|--tail [<tail-num>]: do not stop when end of the logs are reached and wait for additional output

You can tail logs for a particular service:

dokku rethinkdb:logs lollipop

By default, logs will not be tailed, but you can do this with the --tail flag:

dokku rethinkdb:logs lollipop --tail

The default tail setting is to show all logs, but an initial count can also be specified:

dokku rethinkdb:logs lollipop --tail 5

link the rethinkdb service to the app

# usage
dokku rethinkdb:link <service> <app> [--link-flags...]

flags:

• -a|--alias "BLUE_DATABASE": an alternative alias to use for linking to an app via environment variable
• -q|--querystring "pool=5": ampersand delimited querystring arguments to append to the service link

A rethinkdb 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 rethinkdb:link lollipop 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_RETHINKDB_LOLLIPOP_NAME=/lollipop/DATABASE
DOKKU_RETHINKDB_LOLLIPOP_PORT=tcp://172.17.0.1:28015
DOKKU_RETHINKDB_LOLLIPOP_PORT_28015_TCP=tcp://172.17.0.1:28015
DOKKU_RETHINKDB_LOLLIPOP_PORT_28015_TCP_PROTO=tcp
DOKKU_RETHINKDB_LOLLIPOP_PORT_28015_TCP_PORT=28015
DOKKU_RETHINKDB_LOLLIPOP_PORT_28015_TCP_ADDR=172.17.0.1

The following will be set on the linked application by default:

RETHINKDB_URL=rethinkdb://dokku-rethinkdb-lollipop:28015/lollipop

The host exposed here only works internally in docker containers. If you want your container to be reachable from outside, you should use the expose subcommand. Another service can be linked to your app:

dokku rethinkdb:link other_service playground

It is possible to change the protocol for RETHINKDB_URL by setting the environment variable RETHINKDB_DATABASE_SCHEME on the app. Doing so will after linking will cause the plugin to think the service is not linked, and we advise you to unlink before proceeding.

dokku config:set playground RETHINKDB_DATABASE_SCHEME=rethinkdb2
dokku rethinkdb:link lollipop playground

This will cause RETHINKDB_URL to be set as:

rethinkdb2://dokku-rethinkdb-lollipop:28015/lollipop

unlink the rethinkdb service from the app

# usage
dokku rethinkdb:unlink <service> <app>

You can unlink a rethinkdb service:

NOTE: this will restart your app and unset related environment variables

dokku rethinkdb:unlink lollipop playground

Service Lifecycle

The lifecycle of each service can be managed through the following commands:

connect to the service via the rethinkdb connection tool

# usage
dokku rethinkdb:connect <service>

Connect to the service via the rethinkdb connection tool:

NOTE: disconnecting from ssh while running this command may leave zombie processes due to moby/moby#9098

dokku rethinkdb:connect lollipop

enter or run a command in a running rethinkdb service container

# usage
dokku rethinkdb:enter <service>

A bash prompt can be opened against a running service. Filesystem changes will not be saved to disk.

NOTE: disconnecting from ssh while running this command may leave zombie processes due to moby/moby#9098

dokku rethinkdb:enter lollipop

You may also run a command directly against the service. Filesystem changes will not be saved to disk.

dokku rethinkdb:enter lollipop touch /tmp/test

expose a rethinkdb service on custom host:port if provided (random port on the 0.0.0.0 interface if otherwise unspecified)

# usage
dokku rethinkdb:expose <service> <ports...>

Expose the service on the service's normal ports, allowing access to it from the public interface (0.0.0.0):

dokku rethinkdb:expose lollipop 28015 29015 8080

Expose the service on the service's normal ports, with the first on a specified ip adddress (127.0.0.1):

dokku rethinkdb:expose lollipop 127.0.0.1:28015 29015 8080

unexpose a previously exposed rethinkdb service

# usage
dokku rethinkdb:unexpose <service>

Unexpose the service, removing access to it from the public interface (0.0.0.0):

dokku rethinkdb:unexpose lollipop

promote service as RETHINKDB_URL in

# usage
dokku rethinkdb:promote <service> <app>

If you have a rethinkdb service linked to an app and try to link another rethinkdb service another link environment variable will be generated automatically:

DOKKU_RETHINKDB_BLUE_URL=rethinkdb://other_service:ANOTHER_PASSWORD@dokku-rethinkdb-other-service:28015/other_service

You can promote the new service to be the primary one:

NOTE: this will restart your app

dokku rethinkdb:promote other_service playground

This will replace RETHINKDB_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:

RETHINKDB_URL=rethinkdb://other_service:ANOTHER_PASSWORD@dokku-rethinkdb-other-service:28015/other_service
DOKKU_RETHINKDB_BLUE_URL=rethinkdb://other_service:ANOTHER_PASSWORD@dokku-rethinkdb-other-service:28015/other_service
DOKKU_RETHINKDB_SILVER_URL=rethinkdb://lollipop:SOME_PASSWORD@dokku-rethinkdb-lollipop:28015/lollipop

start a previously stopped rethinkdb service

# usage
dokku rethinkdb:start <service>

Start the service:

dokku rethinkdb:start lollipop

stop a running rethinkdb service

# usage
dokku rethinkdb:stop <service>

Stop the service and the running container:

dokku rethinkdb:stop lollipop

graceful shutdown and restart of the rethinkdb service container

# usage
dokku rethinkdb:restart <service>

Restart the service:

dokku rethinkdb:restart lollipop

upgrade service to the specified versions

# usage
dokku rethinkdb:upgrade <service> [--upgrade-flags...]

flags:

• -c|--config-options "--args --go=here": extra arguments to pass to the container create command (default: None)
• -C|--custom-env "USER=alpha;HOST=beta": semi-colon delimited environment variables to start the service with
• -i|--image IMAGE: the image name to start the service with
• -I|--image-version IMAGE_VERSION: the image version to start the service with
• -R|--restart-apps "true": whether to force an app restart
• -s|--shm-size SHM_SIZE: override shared memory size for rethinkdb docker container

You can upgrade an existing service to a new image or image-version:

dokku rethinkdb:upgrade lollipop

Service Automation

Service scripting can be executed using the following commands:

list all rethinkdb service links for a given app

# usage
dokku rethinkdb:app-links <app>

List all rethinkdb services that are linked to the playground app.

dokku rethinkdb:app-links playground

check if the rethinkdb service exists

# usage
dokku rethinkdb:exists <service>

Here we check if the lollipop rethinkdb service exists.

dokku rethinkdb:exists lollipop

check if the rethinkdb service is linked to an app

# usage
dokku rethinkdb:linked <service> <app>

Here we check if the lollipop rethinkdb service is linked to the playground app.

dokku rethinkdb:linked lollipop playground

list all apps linked to the rethinkdb service

# usage
dokku rethinkdb:links <service>

List all apps linked to the lollipop rethinkdb service.

dokku rethinkdb:links lollipop

Disabling docker pull calls

If you wish to disable the docker pull calls that the plugin triggers, you may set the RETHINKDB_DISABLE_PULL environment variable to true. Once disabled, you will need to pull the service image you wish to deploy as shown in the stderr output.

Please ensure the proper images are in place when docker pull is disabled.