99 lines
3.6 KiB
Markdown
99 lines
3.6 KiB
Markdown
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# Docker Stacks
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## Overview
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Docker Stacks are an experimental feature introduced in Docker 1.12, alongside
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the new concepts of Swarms and Services inside the Engine.
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A Dockerfile can be built into an image, and containers can be created from that
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image. Similarly, a docker-compose.yml can be built into a **bundle**, and
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**stacks** can be created from that bundle. In that sense, the bundle is a
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multi-services distributable image format.
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As of 1.12, the feature is introduced as experimental, and Docker Engine doesn't
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support distribution of bundles.
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## Producing a bundle
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The easiest way to produce a bundle is to generate it using `docker-compose`
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from an existing `docker-compose.yml`. Of course, that's just *one* possible way
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to proceed, in the same way that `docker build` isn't the only way to produce a
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Docker image.
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From `docker-compose`:
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```bash
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$ docker-compose bundle
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WARNING: Unsupported key 'network_mode' in services.nsqd - ignoring
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WARNING: Unsupported key 'links' in services.nsqd - ignoring
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WARNING: Unsupported key 'volumes' in services.nsqd - ignoring
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[...]
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Wrote bundle to vossibility-stack.dsb
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```
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## Creating a stack from a bundle
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A stack is created using the `docker deploy` command:
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```bash
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# docker deploy --help
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Usage: docker deploy [OPTIONS] STACK
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Create and update a stack
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Options:
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-f, --bundle string Path to a bundle (Default: STACK.dsb)
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--help Print usage
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```
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Let's deploy the stack created before:
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```bash
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# docker deploy vossibility-stack
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Loading bundle from vossibility-stack.dsb
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Creating service vossibility-stack_elasticsearch
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Creating service vossibility-stack_kibana
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Creating service vossibility-stack_logstash
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Creating service vossibility-stack_lookupd
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Creating service vossibility-stack_nsqd
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Creating service vossibility-stack_vossibility-collector
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```
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We can verify that services were correctly created:
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```bash
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# docker service ls
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ID NAME SCALE IMAGE
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COMMAND
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29bv0vnlm903 vossibility-stack_lookupd 1 nsqio/nsq@sha256:eeba05599f31eba418e96e71e0984c3dc96963ceb66924dd37a47bf7ce18a662 /nsqlookupd
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4awt47624qwh vossibility-stack_nsqd 1 nsqio/nsq@sha256:eeba05599f31eba418e96e71e0984c3dc96963ceb66924dd37a47bf7ce18a662 /nsqd --data-path=/data --lookupd-tcp-address=lookupd:4160
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4tjx9biia6fs vossibility-stack_elasticsearch 1 elasticsearch@sha256:12ac7c6af55d001f71800b83ba91a04f716e58d82e748fa6e5a7359eed2301aa
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7563uuzr9eys vossibility-stack_kibana 1 kibana@sha256:6995a2d25709a62694a937b8a529ff36da92ebee74bafd7bf00e6caf6db2eb03
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9gc5m4met4he vossibility-stack_logstash 1 logstash@sha256:2dc8bddd1bb4a5a34e8ebaf73749f6413c101b2edef6617f2f7713926d2141fe logstash -f /etc/logstash/conf.d/logstash.conf
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axqh55ipl40h vossibility-stack_vossibility-collector 1 icecrime/vossibility-collector@sha256:f03f2977203ba6253988c18d04061c5ec7aab46bca9dfd89a9a1fa4500989fba --config /config/config.toml --debug
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```
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## Managing stacks
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Tasks are managed using the `docker stack` command:
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```bash
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# docker stack --help
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Usage: docker stack COMMAND
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Manage Docker stacks
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Options:
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--help Print usage
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Commands:
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config Print the stack configuration
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deploy Create and update a stack
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rm Remove the stack
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tasks List the tasks in the stack
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Run 'docker stack COMMAND --help' for more information on a command.
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```
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