dokku redis

Official redis plugin for dokku. Currently defaults to installing redis 5.0.7.

Requirements

• dokku 0.12.x+
• docker 1.8.x

Installation

# on 0.12.x+
sudo dokku plugin:install https://github.com/dokku/dokku-redis.git redis

Commands

redis:app-links <app>                              # list all redis service links for a given app
redis:backup <service> <bucket-name> [--use-iam]   # creates a backup of the redis service to an existing s3 bucket
redis:backup-auth <service> <aws-access-key-id> <aws-secret-access-key> <aws-default-region> <aws-signature-version> <endpoint-url> # sets up authentication for backups on the redis service
redis:backup-deauth <service>                      # removes backup authentication for the redis service
redis:backup-schedule <service> <schedule> <bucket-name> [--use-iam] # schedules a backup of the redis service
redis:backup-schedule-cat <service>                # cat the contents of the configured backup cronfile for the service
redis:backup-set-encryption <service> <passphrase> # sets encryption for all future backups of redis service
redis:backup-unschedule <service>                  # unschedules the backup of the redis service
redis:backup-unset-encryption <service>            # unsets encryption for future backups of the redis service
redis:clone <service> <new-service> [--clone-flags...] # create container <new-name> then copy data from <name> into <new-name>
redis:connect <service>                            # connect to the service via the redis connection tool
redis:create <service> [--create-flags...]         # create a redis service
redis:destroy <service> [-f|--force]               # delete the redis service/data/container if there are no links left
redis:enter <service>                              # enter or run a command in a running redis service container
redis:exists <service>                             # check if the redis service exists
redis:export <service>                             # export a dump of the redis service database
redis:expose <service> <ports...>                  # expose a redis service on custom port if provided (random port otherwise)
redis:import <service>                             # import a dump into the redis service database
redis:info <service> [--single-info-flag]          # print the service information
redis:link <service> <app> [--link-flags...]       # link the redis service to the app
redis:linked <service> <app>                       # check if the redis service is linked to an app
redis:links <service>                              # list all apps linked to the redis service
redis:list                                         # list all redis services
redis:logs <service> [-t|--tail]                   # print the most recent log(s) for this service
redis:promote <service> <app>                      # promote service <service> as REDIS_URL in <app>
redis:restart <service>                            # graceful shutdown and restart of the redis service container
redis:start <service>                              # start a previously stopped redis service
redis:stop <service>                               # stop a running redis service
redis:unexpose <service>                           # unexpose a previously exposed redis service
redis:unlink <service> <app>                       # unlink the redis service from the app
redis: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 redis:help. Please consult the redis:help command for any undocumented commands.

Basic Usage

create a redis service

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

flags:

• -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
• -p|--password PASSWORD: override the user-level service password
• -r|--root-password PASSWORD: override the root-level service password

Create a redis service named lolipop:

dokku redis:create lolipop

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

export REDIS_IMAGE="redis"
export REDIS_IMAGE_VERSION="${PLUGIN_IMAGE_VERSION}"
dokku redis:create lolipop

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

export REDIS_CUSTOM_ENV="USER=alpha;HOST=beta"
dokku redis:create lolipop

print the service information

# usage
dokku redis: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 redis:info lolipop

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

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

list all redis services

# usage
dokku redis:list 

List all services:

dokku redis:list

print the most recent log(s) for this service

# usage
dokku redis:logs <service> [-t|--tail]

flags:

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

You can tail logs for a particular service:

dokku redis:logs lolipop

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

dokku redis:logs lolipop --tail

link the redis service to the app

# usage
dokku redis: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 redis 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 redis: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_REDIS_LOLIPOP_NAME=/lolipop/DATABASE
DOKKU_REDIS_LOLIPOP_PORT=tcp://172.17.0.1:6379
DOKKU_REDIS_LOLIPOP_PORT_6379_TCP=tcp://172.17.0.1:6379
DOKKU_REDIS_LOLIPOP_PORT_6379_TCP_PROTO=tcp
DOKKU_REDIS_LOLIPOP_PORT_6379_TCP_PORT=6379
DOKKU_REDIS_LOLIPOP_PORT_6379_TCP_ADDR=172.17.0.1

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

REDIS_URL=redis://lolipop:SOME_PASSWORD@dokku-redis-lolipop:6379/lolipop

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 redis:link other_service playground

It is possible to change the protocol for REDIS_URL by setting the environment variable REDIS_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 REDIS_DATABASE_SCHEME=redis2
dokku redis:link lolipop playground

This will cause REDIS_URL to be set as:

redis2://lolipop:SOME_PASSWORD@dokku-redis-lolipop:6379/lolipop

unlink the redis service from the app

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

You can unlink a redis service:

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

dokku redis:unlink lolipop playground

Service Lifecycle

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

connect to the service via the redis connection tool

# usage
dokku redis:connect <service>

Connect to the service via the redis connection tool:

dokku redis:connect lolipop

enter or run a command in a running redis service container

# usage
dokku redis:enter <service>

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

dokku redis:enter lolipop

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

dokku redis:enter lolipop touch /tmp/test

expose a redis service on custom port if provided (random port otherwise)

# usage
dokku redis: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 redis:expose lolipop 6379

unexpose a previously exposed redis service

# usage
dokku redis:unexpose <service>

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

dokku redis:unexpose lolipop

promote service as REDIS_URL in

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

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

DOKKU_REDIS_BLUE_URL=redis://other_service:ANOTHER_PASSWORD@dokku-redis-other-service:6379/other_service

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

NOTE: this will restart your app

dokku redis:promote other_service playground

This will replace REDIS_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:

REDIS_URL=redis://other_service:ANOTHER_PASSWORD@dokku-redis-other-service:6379/other_service
DOKKU_REDIS_BLUE_URL=redis://other_service:ANOTHER_PASSWORD@dokku-redis-other-service:6379/other_service
DOKKU_REDIS_SILVER_URL=redis://lolipop:SOME_PASSWORD@dokku-redis-lolipop:6379/lolipop

start a previously stopped redis service

# usage
dokku redis:start <service>

Start the service:

dokku redis:start lolipop

stop a running redis service

# usage
dokku redis:stop <service>

Stop the service and the running container:

dokku redis:stop lolipop

graceful shutdown and restart of the redis service container

# usage
dokku redis:restart <service>

Restart the service:

dokku redis:restart lolipop

upgrade service to the specified versions

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

flags:

• -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

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

dokku redis:upgrade lolipop

Service Automation

Service scripting can be executed using the following commands:

list all redis service links for a given app

# usage
dokku redis:app-links <app>

List all redis services that are linked to the 'playground' app.

dokku redis:app-links playground

create container then copy data from into

# usage
dokku redis:clone <service> <new-service> [--clone-flags...]

flags:

• -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
• -p|--password PASSWORD: override the user-level service password
• -r|--root-password PASSWORD: override the root-level service password

You can clone an existing service to a new one:

dokku redis:clone lolipop lolipop-2

check if the redis service exists

# usage
dokku redis:exists <service>

Here we check if the lolipop redis service exists.

dokku redis:exists lolipop

check if the redis service is linked to an app

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

Here we check if the lolipop redis service is linked to the 'playground' app.

dokku redis:linked lolipop playground

list all apps linked to the redis service

# usage
dokku redis:links <service>

List all apps linked to the 'lolipop' redis service.

dokku redis:links lolipop

Data Management

The underlying service data can be imported and exported with the following commands:

import a dump into the redis service database

# usage
dokku redis:import <service>

Import a datastore dump:

dokku redis:import lolipop < database.dump

export a dump of the redis service database

# usage
dokku redis:export <service>

By default, datastore output is exported to stdout:

dokku redis:export lolipop

You can redirect this output to a file:

dokku redis:export lolipop > lolipop.dump

Backups

Datastore backups are supported via AWS S3 and S3 compatible services like minio.

You may skip the backup-auth step if your dokku install is running within EC2 and has access to the bucket via an IAM profile. In that case, use the --use-iam option with the backup command.

Backups can be performed using the backup commands:

sets up authentication for backups on the redis service

# usage
dokku redis:backup-auth <service> <aws-access-key-id> <aws-secret-access-key> <aws-default-region> <aws-signature-version> <endpoint-url>

Setup s3 backup authentication:

dokku redis:backup-auth lolipop AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY

Setup s3 backup authentication with different region:

dokku redis:backup-auth lolipop AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_REGION

Setup s3 backup authentication with different signature version and endpoint:

dokku redis:backup-auth lolipop AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_REGION AWS_SIGNATURE_VERSION ENDPOINT_URL

More specific example for minio auth:

dokku redis:backup-auth lolipop MINIO_ACCESS_KEY_ID MINIO_SECRET_ACCESS_KEY us-east-1 s3v4 https://YOURMINIOSERVICE

removes backup authentication for the redis service

# usage
dokku redis:backup-deauth <service>

Remove s3 authentication:

dokku redis:backup-deauth lolipop

creates a backup of the redis service to an existing s3 bucket

# usage
dokku redis:backup <service> <bucket-name> [--use-iam]

flags:

• -u|--use-iam: use the IAM profile associated with the current server

Backup the 'lolipop' service to the 'my-s3-bucket' bucket on ``AWS:

dokku redis:backup lolipop my-s3-bucket --use-iam

sets encryption for all future backups of redis service

# usage
dokku redis:backup-set-encryption <service> <passphrase>

Set the GPG-compatible passphrase for encrypting backups for backups:

dokku redis:backup-set-encryption lolipop

unsets encryption for future backups of the redis service

# usage
dokku redis:backup-unset-encryption <service>

Unset the GPG encryption passphrase for backups:

dokku redis:backup-unset-encryption lolipop

schedules a backup of the redis service

# usage
dokku redis:backup-schedule <service> <schedule> <bucket-name> [--use-iam]

flags:

• -u|--use-iam: use the IAM profile associated with the current server

Schedule a backup:

'schedule' is a crontab expression, eg. "0 3 * * *" for each day at 3am

dokku redis:backup-schedule lolipop "0 3 * * *" my-s3-bucket

Schedule a backup and authenticate via iam:

dokku redis:backup-schedule lolipop "0 3 * * *" my-s3-bucket --use-iam

cat the contents of the configured backup cronfile for the service

# usage
dokku redis:backup-schedule-cat <service>

Cat the contents of the configured backup cronfile for the service:

dokku redis:backup-schedule-cat lolipop

unschedules the backup of the redis service

# usage
dokku redis:backup-unschedule <service>

Remove the scheduled backup from cron:

dokku redis:backup-unschedule lolipop

Disabling docker pull calls

If you wish to disable the docker pull calls that the plugin triggers, you may set the REDIS_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.