82 lines
2.2 KiB
Markdown
82 lines
2.2 KiB
Markdown
Rancher Swarm
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=============
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A simple tutorial on how to make a Docker swarm cluster on top of Vagrant.
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For this you need at least 3 GB of ram free on your computer. This might work
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with less if you change the ram levels, but just have at least 3 GB of ram free
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just in case.
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How to cluster
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--------------
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First, you need the machines to cluster:
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```console
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$ vagrant up
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```
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Now, you need a docker swarm discovery token:
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```console
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$ docker run --rm swarm create
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fd243153d366c4fc088de73681b884ad
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```
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First you'll need to get the first runner online and waiting in the cluster.
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```console
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$ vagrant ssh runner-01
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runner-01$ sudo ros c set user_docker.args '[docker, -d, -s, overlay, -G, docker, -H, unix:///var/run/docker.sock, -H, tcp://0.0.0.0:2375]'
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runner-01$ sudo system-docker restart docker
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```
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Now have that machine join the cluster:
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```console
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runner-01$ docker run --name swarm -d swarm join --addr=172.19.8.101:2375 token://fd243153d366c4fc088de73681b884ad
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```
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Repeat this for the other two nodes.
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Now connect to the management vm:
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```console
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$ vagrant ssh manager
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manager$ docker run -d -p 2375:2375 swarm manage token://fd243153d366c4fc088de73681b884ad
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```
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You now have a working cluster. Now to prove it:
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```console
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$ docker -H tcp://172.19.8.104:2375 info
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Containers: 3
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Images: 3
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Role: primary
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Strategy: spread
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Filters: affinity, health, constraint, port, dependency
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Nodes: 3
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runner-01: 172.19.8.101:2375
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└ Containers: 1
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└ Reserved CPUs: 0 / 1
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└ Reserved Memory: 0 B / 1.025 GiB
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└ Labels: executiondriver=native-0.2, kernelversion=3.19.8-ckt1-rancher, operatingsystem=<unknown>, storagedriver=overlay
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runner-02: 172.19.8.102:2375
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└ Containers: 1
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└ Reserved CPUs: 0 / 1
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└ Reserved Memory: 0 B / 1.025 GiB
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└ Labels: executiondriver=native-0.2, kernelversion=3.19.8-ckt1-rancher, operatingsystem=<unknown>, storagedriver=overlay
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runner-03: 172.19.8.103:2375
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└ Containers: 1
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└ Reserved CPUs: 0 / 1
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└ Reserved Memory: 0 B / 1.025 GiB
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└ Labels: executiondriver=native-0.2, kernelversion=3.19.8-ckt1-rancher, operatingsystem=<unknown>, storagedriver=overlay
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CPUs: 3
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Total Memory: 3.075 GiB
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Name: 66d026cc952c
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```
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You may need to unset `DOCKER_TLS_VERIFY` depending on your configuration.
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Now you have a working docker swarm!
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