dokku couchdb

Official couchdb plugin for dokku. Currently defaults to installing couchdb 3.4.2.

Requirements

• dokku 0.19.x+
• docker 1.8.x

Installation

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

Commands

couchdb:app-links <app>                            # list all couchdb service links for a given app
couchdb:backup <service> <bucket-name> [--use-iam] # create a backup of the couchdb service to an existing s3 bucket
couchdb: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 couchdb service
couchdb:backup-deauth <service>                    # remove backup authentication for the couchdb service
couchdb:backup-schedule <service> <schedule> <bucket-name> [--use-iam] # schedule a backup of the couchdb service
couchdb:backup-schedule-cat <service>              # cat the contents of the configured backup cronfile for the service
couchdb:backup-set-encryption <service> <passphrase> # set encryption for all future backups of couchdb service
couchdb:backup-unschedule <service>                # unschedule the backup of the couchdb service
couchdb:backup-unset-encryption <service>          # unset encryption for future backups of the couchdb service
couchdb:clone <service> <new-service> [--clone-flags...] # create container <new-name> then copy data from <name> into <new-name>
couchdb:connect <service>                          # connect to the service via the couchdb connection tool
couchdb:create <service> [--create-flags...]       # create a couchdb service
couchdb:destroy <service> [-f|--force]             # delete the couchdb service/data/container if there are no links left
couchdb:enter <service>                            # enter or run a command in a running couchdb service container
couchdb:exists <service>                           # check if the couchdb service exists
couchdb:export <service>                           # export a dump of the couchdb service database
couchdb:expose <service> <ports...>                # expose a couchdb service on custom host:port if provided (random port on the 0.0.0.0 interface if otherwise unspecified)
couchdb:import <service>                           # import a dump into the couchdb service database
couchdb:info <service> [--single-info-flag]        # print the service information
couchdb:link <service> <app> [--link-flags...]     # link the couchdb service to the app
couchdb:linked <service> <app>                     # check if the couchdb service is linked to an app
couchdb:links <service>                            # list all apps linked to the couchdb service
couchdb:list                                       # list all couchdb services
couchdb:logs <service> [-t|--tail] <tail-num-optional> # print the most recent log(s) for this service
couchdb:pause <service>                            # pause a running couchdb service
couchdb:promote <service> <app>                    # promote service <service> as COUCHDB_URL in <app>
couchdb:restart <service>                          # graceful shutdown and restart of the couchdb service container
couchdb:set <service> <key> <value>                # set or clear a property for a service
couchdb:start <service>                            # start a previously stopped couchdb service
couchdb:stop <service>                             # stop a running couchdb service
couchdb:unexpose <service>                         # unexpose a previously exposed couchdb service
couchdb:unlink <service> <app>                     # unlink the couchdb service from the app
couchdb: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 couchdb:help. Plugin help output in conjunction with any files in the docs/ folder is used to generate the plugin documentation. Please consult the couchdb:help command for any undocumented commands.

Basic Usage

create a couchdb service

# usage
dokku couchdb: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)
• -N|--initial-network INITIAL_NETWORK: the initial network to attach the service to
• -p|--password PASSWORD: override the user-level service password
• -P|--post-create-network NETWORKS: a comma-separated list of networks to attach the service container to after service creation
• -r|--root-password PASSWORD: override the root-level service password
• -S|--post-start-network NETWORKS: a comma-separated list of networks to attach the service container to after service start
• -s|--shm-size SHM_SIZE: override shared memory size for couchdb docker container

Create a couchdb service named lollipop:

dokku couchdb:create lollipop

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

export COUCHDB_IMAGE="couchdb"
export COUCHDB_IMAGE_VERSION="${PLUGIN_IMAGE_VERSION}"
dokku couchdb:create lollipop

You can also specify custom environment variables to start the couchdb service in semicolon-separated form.

export COUCHDB_CUSTOM_ENV="USER=alpha;HOST=beta"
dokku couchdb:create lollipop

print the service information

# usage
dokku couchdb: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
• --initial-network: show the initial network being connected to
• --links: show the service app links
• --post-create-network: show the networks to attach to after service container creation
• --post-start-network: show the networks to attach to after service container start
• --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 couchdb:info lollipop

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

dokku couchdb:info lollipop --config-dir
dokku couchdb:info lollipop --data-dir
dokku couchdb:info lollipop --dsn
dokku couchdb:info lollipop --exposed-ports
dokku couchdb:info lollipop --id
dokku couchdb:info lollipop --internal-ip
dokku couchdb:info lollipop --initial-network
dokku couchdb:info lollipop --links
dokku couchdb:info lollipop --post-create-network
dokku couchdb:info lollipop --post-start-network
dokku couchdb:info lollipop --service-root
dokku couchdb:info lollipop --status
dokku couchdb:info lollipop --version

list all couchdb services

# usage
dokku couchdb:list

List all services:

dokku couchdb:list

print the most recent log(s) for this service

# usage
dokku couchdb: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 couchdb:logs lollipop

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

dokku couchdb:logs lollipop --tail

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

dokku couchdb:logs lollipop --tail 5

link the couchdb service to the app

# usage
dokku couchdb: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
• -n|--no-restart "false": whether or not to restart the app on link (default: true)

A couchdb 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 couchdb: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_COUCHDB_LOLLIPOP_NAME=/lollipop/DATABASE
DOKKU_COUCHDB_LOLLIPOP_PORT=tcp://172.17.0.1:5984
DOKKU_COUCHDB_LOLLIPOP_PORT_5984_TCP=tcp://172.17.0.1:5984
DOKKU_COUCHDB_LOLLIPOP_PORT_5984_TCP_PROTO=tcp
DOKKU_COUCHDB_LOLLIPOP_PORT_5984_TCP_PORT=5984
DOKKU_COUCHDB_LOLLIPOP_PORT_5984_TCP_ADDR=172.17.0.1

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

COUCHDB_URL=http://lollipop:SOME_PASSWORD@dokku-couchdb-lollipop:5984/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 couchdb:link other_service playground

It is possible to change the protocol for COUCHDB_URL by setting the environment variable COUCHDB_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 COUCHDB_DATABASE_SCHEME=http2
dokku couchdb:link lollipop playground

This will cause COUCHDB_URL to be set as:

http2://lollipop:SOME_PASSWORD@dokku-couchdb-lollipop:5984/lollipop

unlink the couchdb service from the app

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

flags:

• -n|--no-restart "false": whether or not to restart the app on unlink (default: true)

You can unlink a couchdb service:

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

dokku couchdb:unlink lollipop playground

set or clear a property for a service

# usage
dokku couchdb:set <service> <key> <value>

Set the network to attach after the service container is started:

dokku couchdb:set lollipop post-create-network custom-network

Set multiple networks:

dokku couchdb:set lollipop post-create-network custom-network,other-network

Unset the post-create-network value:

dokku couchdb:set lollipop post-create-network

Service Lifecycle

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

connect to the service via the couchdb connection tool

# usage
dokku couchdb:connect <service>

Connect to the service via the couchdb connection tool:

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

dokku couchdb:connect lollipop

enter or run a command in a running couchdb service container

# usage
dokku couchdb: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 couchdb:enter lollipop

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

dokku couchdb:enter lollipop touch /tmp/test

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

# usage
dokku couchdb: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 couchdb:expose lollipop 5984

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

dokku couchdb:expose lollipop 127.0.0.1:5984

unexpose a previously exposed couchdb service

# usage
dokku couchdb:unexpose <service>

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

dokku couchdb:unexpose lollipop

promote service as COUCHDB_URL in

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

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

DOKKU_COUCHDB_BLUE_URL=http://other_service:ANOTHER_PASSWORD@dokku-couchdb-other-service:5984/other_service

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

NOTE: this will restart your app

dokku couchdb:promote other_service playground

This will replace COUCHDB_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:

COUCHDB_URL=http://other_service:ANOTHER_PASSWORD@dokku-couchdb-other-service:5984/other_service
DOKKU_COUCHDB_BLUE_URL=http://other_service:ANOTHER_PASSWORD@dokku-couchdb-other-service:5984/other_service
DOKKU_COUCHDB_SILVER_URL=http://lollipop:SOME_PASSWORD@dokku-couchdb-lollipop:5984/lollipop

start a previously stopped couchdb service

# usage
dokku couchdb:start <service>

Start the service:

dokku couchdb:start lollipop

stop a running couchdb service

# usage
dokku couchdb:stop <service>

Stop the service and removes the running container:

dokku couchdb:stop lollipop

pause a running couchdb service

# usage
dokku couchdb:pause <service>

Pause the running container for the service:

dokku couchdb:pause lollipop

graceful shutdown and restart of the couchdb service container

# usage
dokku couchdb:restart <service>

Restart the service:

dokku couchdb:restart lollipop

upgrade service to the specified versions

# usage
dokku couchdb: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
• -N|--initial-network INITIAL_NETWORK: the initial network to attach the service to
• -P|--post-create-network NETWORKS: a comma-separated list of networks to attach the service container to after service creation
• -R|--restart-apps "true": whether or not to force an app restart (default: false)
• -S|--post-start-network NETWORKS: a comma-separated list of networks to attach the service container to after service start
• -s|--shm-size SHM_SIZE: override shared memory size for couchdb docker container

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

dokku couchdb:upgrade lollipop

Service Automation

Service scripting can be executed using the following commands:

list all couchdb service links for a given app

# usage
dokku couchdb:app-links <app>

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

dokku couchdb:app-links playground

create container then copy data from into

# usage
dokku couchdb: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)
• -N|--initial-network INITIAL_NETWORK: the initial network to attach the service to
• -p|--password PASSWORD: override the user-level service password
• -P|--post-create-network NETWORKS: a comma-separated list of networks to attach the service container to after service creation
• -r|--root-password PASSWORD: override the root-level service password
• -S|--post-start-network NETWORKS: a comma-separated list of networks to attach the service container to after service start
• -s|--shm-size SHM_SIZE: override shared memory size for couchdb docker container

You can clone an existing service to a new one:

dokku couchdb:clone lollipop lollipop-2

check if the couchdb service exists

# usage
dokku couchdb:exists <service>

Here we check if the lollipop couchdb service exists.

dokku couchdb:exists lollipop

check if the couchdb service is linked to an app

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

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

dokku couchdb:linked lollipop playground

list all apps linked to the couchdb service

# usage
dokku couchdb:links <service>

List all apps linked to the lollipop couchdb service.

dokku couchdb:links lollipop

Data Management

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

import a dump into the couchdb service database

# usage
dokku couchdb:import <service>

Import a datastore dump:

dokku couchdb:import lollipop < data.dump

export a dump of the couchdb service database

# usage
dokku couchdb:export <service>

By default, datastore output is exported to stdout:

dokku couchdb:export lollipop

You can redirect this output to a file:

dokku couchdb: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 couchdb service

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

Setup s3 backup authentication:

dokku couchdb:backup-auth lollipop AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY

Setup s3 backup authentication with different region:

dokku couchdb:backup-auth lollipop AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_REGION

Setup s3 backup authentication with different signature version and endpoint:

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

remove backup authentication for the couchdb service

# usage
dokku couchdb:backup-deauth <service>

Remove s3 authentication:

dokku couchdb:backup-deauth lollipop

create a backup of the couchdb service to an existing s3 bucket

# usage
dokku couchdb: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 couchdb:backup lollipop my-s3-bucket --use-iam

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

dokku couchdb:import lollipop < backup-folder/export

set encryption for all future backups of couchdb service

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

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

dokku couchdb:backup-set-encryption lollipop

unset encryption for future backups of the couchdb service

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

Unset the GPG encryption passphrase for backups:

dokku couchdb:backup-unset-encryption lollipop

schedule a backup of the couchdb service

# usage
dokku couchdb: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 couchdb:backup-schedule lollipop "0 3 * * *" my-s3-bucket

Schedule a backup and authenticate via iam:

dokku couchdb:backup-schedule lollipop "0 3 * * *" my-s3-bucket --use-iam

cat the contents of the configured backup cronfile for the service

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

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

dokku couchdb:backup-schedule-cat lollipop

unschedule the backup of the couchdb service

# usage
dokku couchdb:backup-unschedule <service>

Remove the scheduled backup from cron:

dokku couchdb:backup-unschedule lollipop

Disabling docker image pull calls

If you wish to disable the docker image pull calls that the plugin triggers, you may set the COUCHDB_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 image pull is disabled.