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Setting up StorageOS on a Docker Swarm

This a very basic setup to test StorageOS on Docker Swarm.

Getting started

Clone this git repo:

git clone https://github.com/pvdbleek/storageos

Deploying consul

docker stack deploy -c docker-compose.yml storageos-consul

One one of your swarm nodes, test if consul works properly:

curl http://localhost:8500/v1/status/peers
["10.0.1.4:8300","10.0.1.3:8300","10.0.1.5:8300"]

This should return three peers in your consul cluster. Do NOT continue if this is not the case. Your storageos will potentially connect to three different kv-stores, and the effects of that are quit funny ;-)

Install the StorageOS plugin on all swarm nodes

Execute the following on each node: ./setup_storageos_on_dockernode.sh

Verify your installation

# export STORAGEOS_USERNAME=storageos STORAGEOS_PASSWORD=storageos
# storageos node ls
NAME                          ADDRESS             HEALTH               SCHEDULER           VOLUMES             TOTAL               USED                VERSION                LABELS
engine1.pvdbleek.dtcntr.net   10.0.21.10          Healthy 40 minutes   true                M: 1, R: 0          19.32 GiB           17.76%              0.7.10 (3fb8936 rev)
engine2.pvdbleek.dtcntr.net   10.0.28.19          Healthy 32 minutes   false               M: 0, R: 0          19.32 GiB           14.95%              0.7.10 (3fb8936 rev)
engine3.pvdbleek.dtcntr.net   10.0.18.252         Healthy 34 minutes   false               M: 0, R: 1          19.32 GiB           16.46%              0.7.10 (3fb8936 rev)
engine4.pvdbleek.dtcntr.net   10.0.19.102         Healthy 34 minutes   false               M: 0, R: 0          19.32 GiB           35.35%              0.7.10 (3fb8936 rev)
engine5.pvdbleek.dtcntr.net   10.0.25.93          Healthy 34 minutes   false               M: 0, R: 1          19.32 GiB           34.71%              0.7.10 (3fb8936 rev)
engine6.pvdbleek.dtcntr.net   10.0.18.53          Healthy 32 minutes   false               M: 0, R: 1          19.32 GiB           34.58%              0.7.10 (3fb8936 rev)

Basic test of StorageOS

I've created a rule to make sure that each volume has three replica's for high-availability:

storageos rule create --namespace default --action add --label storageos.feature.replicas=3 replicator

Now, let's create a docker volume:

docker volume create --driver storageos --opt size=1 storageos-volume

Verify that you can see the volume on all swarm nodes:

# docker volume ls | grep storageos-volume
storageos:latest    storageos-volume

Run a container with that volume and create a file in it:

# docker run --rm -ti -v storageos-volume:/data --volume-driver storageos alpine /bin/sh
/ # ls -al /data
total 24
drwxr-xr-x    3 root     root          4096 Jul 14 20:10 .
drwxr-xr-x   26 root     root          4096 Jul 14 20:10 ..
drwx------    2 root     root         16384 Jul 14 19:41 lost+found
/ # touch /data/testfile
/ # ls -al /data
total 24
drwxr-xr-x    3 root     root          4096 Jul 14 20:10 .
drwxr-xr-x   26 root     root          4096 Jul 14 20:10 ..
drwx------    2 root     root         16384 Jul 14 19:41 lost+found
-rw-r--r--    1 root     root             0 Jul 14 20:10 testfile
/ # exit

Finally, run the container on another host and verify the content of the volume:

# docker run --rm -ti -v storageos-volume:/data --volume-driver storageos alpine /bin/sh
/ # ls -al /data
total 24
drwxr-xr-x    3 root     root          4096 Jul 14 20:10 .
drwxr-xr-x   26 root     root          4096 Jul 14 20:12 ..
drwx------    2 root     root         16384 Jul 14 19:41 lost+found
-rw-r--r--    1 root     root             0 Jul 14 20:10 testfile
/ # exit

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demo setup for storageos and docker swarm

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