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Update Ceph recipe for addition of mgr daemons

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David Young
2017-10-01 20:46:29 +13:00
parent a06849afe0
commit 1ccf92b579
1 changed files with 15 additions and 0 deletions
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manuscript/ha-docker-swarm/shared-storage-ceph.md
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@@ -56,6 +56,20 @@ ceph/daemon mon
Now **copy** the contents of /etc/ceph on this first node to the remaining nodes, and **then** run the docker command above (_customizing MON_IP as you go_) on each remaining node. You'll end up with a cluster with 3 monitors (odd number is required for quorum, same as Docker Swarm), and no OSDs (yet) Now **copy** the contents of /etc/ceph on this first node to the remaining nodes, and **then** run the docker command above (_customizing MON_IP as you go_) on each remaining node. You'll end up with a cluster with 3 monitors (odd number is required for quorum, same as Docker Swarm), and no OSDs (yet)
### Setup Managers
Since Ceph v12 ("Luminous"), some of the non-realtime cluster management responsibilities are delegated to a "manager". Run the following on every node - only one node will be __active__, the others will be in standby:
```
docker run -d --net=host \
--privileged=true \
--pid=host \
-v /etc/ceph:/etc/ceph \
-v /var/lib/ceph/:/var/lib/ceph/ \
--name="ceph-mgr" \
--restart=always \
ceph/daemon mgs
```
### Setup OSDs ### Setup OSDs
@@ -185,3 +199,4 @@ After completing the above, you should have:
Future enhancements to this recipe include: Future enhancements to this recipe include:
1. Rather than pasting a secret key into /etc/fstab (which feels wrong), I'd prefer to be able to set "secretfile" in /etc/fstab (which just points ceph.mount to a file containing the secret), but under the current CentOS Atomic, we're stuck with "secret", per https://bugzilla.redhat.com/show_bug.cgi?id=1030402 1. Rather than pasting a secret key into /etc/fstab (which feels wrong), I'd prefer to be able to set "secretfile" in /etc/fstab (which just points ceph.mount to a file containing the secret), but under the current CentOS Atomic, we're stuck with "secret", per https://bugzilla.redhat.com/show_bug.cgi?id=1030402
2. This recipe was written with Ceph v11 "Jewel". Ceph have subsequently releaesd v12 "Kraken". I've updated the recipe for the addition of "Manager" daemons, but it should be noted that the [only reader so far](https://discourse.geek-kitchen.funkypenguin.co.nz/u/ggilley) to attempt a Ceph install using CentOS Atomic and Ceph v12 had issues with OSDs, which lead him to [move to Ubuntu 1604](https://discourse.geek-kitchen.funkypenguin.co.nz/t/shared-storage-ceph-funky-penguins-geek-cookbook/47/24?u=funkypenguin) instead.