MyWay/dokku-redis

a redis plugin for dokku

dokku redis

Official redis plugin for dokku. Currently defaults to installing redis 7.0.2.

Requirements

• dokku 0.19.x+
• docker 1.8.x

Installation

# on 0.19.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]   # create 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> # set up authentication for backups on the redis service
redis:backup-deauth <service>                      # remove backup authentication for the redis service
redis:backup-schedule <service> <schedule> <bucket-name> [--use-iam] # schedule 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> # set encryption for all future backups of redis service
redis:backup-unschedule <service>                  # unschedule the backup of the redis service
redis:backup-unset-encryption <service>            # unset 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 host:port if provided (random port on the 0.0.0.0 interface if otherwise unspecified)
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] <tail-num-optional> # 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. Plugin help output in conjunction with any files in the docs/ folder is used to generate the plugin documentation. 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|--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 redis docker container

Create a redis service named lollipop:

dokku redis:create lollipop

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 lollipop

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 lollipop

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 lollipop

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

dokku redis:info lollipop --config-dir
dokku redis:info lollipop --data-dir
dokku redis:info lollipop --dsn
dokku redis:info lollipop --exposed-ports
dokku redis:info lollipop --id
dokku redis:info lollipop --internal-ip
dokku redis:info lollipop --links
dokku redis:info lollipop --service-root
dokku redis:info lollipop --status
dokku redis:info lollipop --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] <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 redis:logs lollipop

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

dokku redis:logs lollipop --tail

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

dokku redis:logs lollipop --tail 5

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 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_REDIS_LOLLIPOP_NAME=/lollipop/DATABASE
DOKKU_REDIS_LOLLIPOP_PORT=tcp://172.17.0.1:6379
DOKKU_REDIS_LOLLIPOP_PORT_6379_TCP=tcp://172.17.0.1:6379
DOKKU_REDIS_LOLLIPOP_PORT_6379_TCP_PROTO=tcp
DOKKU_REDIS_LOLLIPOP_PORT_6379_TCP_PORT=6379
DOKKU_REDIS_LOLLIPOP_PORT_6379_TCP_ADDR=172.17.0.1

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

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

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 lollipop playground

This will cause REDIS_URL to be set as:

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

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 lollipop 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:

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

dokku redis:connect lollipop

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.

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

dokku redis:enter lollipop

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

dokku redis:enter lollipop touch /tmp/test

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

# 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 lollipop 6379

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

dokku redis:expose lollipop 127.0.0.1:6379

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 lollipop

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

start a previously stopped redis service

# usage
dokku redis:start <service>

Start the service:

dokku redis:start lollipop

stop a running redis service

# usage
dokku redis:stop <service>

Stop the service and the running container:

dokku redis:stop lollipop

graceful shutdown and restart of the redis service container

# usage
dokku redis:restart <service>

Restart the service:

dokku redis:restart lollipop

upgrade service to the specified versions

# usage
dokku redis: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 redis docker container

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

dokku redis:upgrade lollipop

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|--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 redis docker container

You can clone an existing service to a new one:

dokku redis:clone lollipop lollipop-2

check if the redis service exists

# usage
dokku redis:exists <service>

Here we check if the lollipop redis service exists.

dokku redis:exists lollipop

check if the redis service is linked to an app

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

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

dokku redis:linked lollipop playground

list all apps linked to the redis service

# usage
dokku redis:links <service>

List all apps linked to the lollipop redis service.

dokku redis:links lollipop

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 lollipop < data.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 lollipop

You can redirect this output to a file:

dokku redis:export lollipop > data.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:

set 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 lollipop AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY

Setup s3 backup authentication with different region:

dokku redis:backup-auth lollipop AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_REGION

Setup s3 backup authentication with different signature version and endpoint:

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

remove backup authentication for the redis service

# usage
dokku redis:backup-deauth <service>

Remove s3 authentication:

dokku redis:backup-deauth lollipop

create 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 lollipop service to the my-s3-bucket bucket on AWS:`

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

Restore a backup file (assuming it was extracted via tar -xf backup.tgz):

dokku redis:import lollipop < backup-folder/export

set 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 lollipop

unset 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 lollipop

schedule 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 lollipop "0 3 * * *" my-s3-bucket

Schedule a backup and authenticate via iam:

dokku redis:backup-schedule lollipop "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 lollipop

unschedule the backup of the redis service

# usage
dokku redis:backup-unschedule <service>

Remove the scheduled backup from cron:

dokku redis:backup-unschedule lollipop

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.