Customizing store-metadata¶
The following settings are tunable for the Store component’s metadata service.
Dependencies¶
Requires: store-daemon, store-monitor
Required by: store-volume service (runs on all hosts - not a Deis component)
Considerations: none
Settings set by store-metadata¶
The following etcd keys are set by the store-metadata component, typically in its /bin/boot script.
| setting | description |
|---|---|
| /deis/store/filesystemSetupComplete | Set when the Ceph filesystem setup is complete |
Settings used by store-metadata¶
The following etcd keys are used by the store-metadata component.
| setting | description |
|---|---|
| /deis/store/adminKeyring | keyring for an admin user to access the Ceph cluster (set by store-monitor) |
| /deis/store/fsid | Ceph filesystem ID (set by store-monitor) |
| /deis/store/hosts/* | deis-monitor hosts (set by store-monitor) |
| /deis/store/maxPGsPerOSDWarning | threshold for warning on number of placement groups per OSD (set by store-monitor) |
| /deis/store/monKeyring | keyring for the monitor to access the Ceph cluster (set by store-monitor) |
| /deis/store/monSetupComplete | set when the Ceph cluster setup is complete (set by store-monitor) |
| /deis/store/monSetupLock | host of store-monitor that completed setup (set by store-monitor) |
| /deis/store/minSize | minimum number of store-daemons necessary for the cluster to accept writes (set by store-monitor) |
| /deis/store/pgNum | number of Ceph placement groups for the storage pools (set by store-monitor) |
| /deis/store/size | number of replicas for data stored in Ceph (set by store-monitor) |
Using a custom store-metadata image¶
You can use a custom Docker image for the store-metadata component instead of the image supplied with Deis:
$ deisctl config store-metadata set image=myaccount/myimage:latest
This will pull the image from the public Docker registry. You can also pull from a private registry:
$ deisctl config store-metadata set image=registry.mydomain.org:5000/myaccount/myimage:latest
Be sure that your custom image functions in the same way as the stock store-metadata image shipped with Deis. Specifically, ensure that it sets and reads appropriate etcd keys.