OSE ceph examples

[jeffvance]

I've added several examples using ceph to persist a mysql database.

[smarterclayton]

@bparees @mfojtik can you guys look over these?

[bparees]

this should use the openshift provided mysql image instead, which doesn't require any security changes to work....
https://github.com/openshift/mysql

[bparees]

my main concern is it doesn't use our openshift mysql image.

1. that means more steps for users to setup for security
2. if our image doesn't work for this example, we should fix it.

but for a detailed review of the actual steps/instructions, this seems better suited to the storage team.. @markturansky @eparis ?

[markturansky]

Two things:

1. I agree with Ben that this can use our own MySQL image. See the WordPress example: https://github.com/openshift/origin/blob/master/examples/wordpress/pod-mysql.yaml

(1a -- Ben, if your team could make a WordPress image that didn't require root/port 80, the WordPress example becomes simpler by removing the security caveats from the readme).

1. @jsafrane has a PR (RFC: refactor persistent storage example and add Cinder documentation #4403) that re-uses the WordPress example and shows how you can swap out storage beneath. The overall example is the same.

I prefer Jan's approach. I think this ceph example should re-use our WordPress stuff. This PR could add a 3rd volume to the example (NFS was first, Jan added Cinder, this PR can add Ceph).

[markturansky]

Also, I know nothing of Ceph, so I leave detailed steps/instructions review to @rootfs who wrote the Ceph plugin and upstream readme.

[jeffvance]

I will redo the example to fit under the wordpress umbrella. Using Jan's wordpress readme, I'll add a ceph bullet under the "Storage Provisioning" header.

[bparees]

@markturansky shockingly enough, this actually worked:

# create a mysql db service (in this case using ephemeral storage but obviously you can set it up however you like)
$ oc new-app mysql-ephemeral

# create a new app using our s2i php builder and the wordpress github repo
$ oc new-app https://github.com/wordpress/wordpress

Then connect to the wordpress service via your web browser. you'll need to supply the mysql user/password/dbname/service ip as part of the setup. (the user/pass/dbname generated by the template as env variables)

[markturansky]

that's very cool :)

On Wed, Sep 23, 2015 at 3:50 PM, Ben Parees notifications@github.com
wrote:

@markturansky https://github.com/markturansky shockingly enough, this
actually worked:
create a mysql db service (in this case using ephemeral storage but
obviously you can set it up however you like)

$ oc new-app mysql-ephemeral
create a new app using our s2i php builder and the wordpress github repo

$ oc new-app https://github.com/wordpress/wordpress

Then connect to the wordpress service via your web browser. you'll need to
supply the mysql user/password/dbname/service ip as part of the setup. (the
user/pass/dbname generated by the template as env variables)

—
Reply to this email directly or view it on GitHub
#4772 (comment).

[mfojtik]

@mnagy fyi

[rootfs]

echo -n

[danmcp]

@jeffvance Needs to be squashed after the comments are addressed.

[detiber]

This is no longer needed with the version of kubernetes that we bundle.

[jsafrane]

you can use "mysql" as <mysql-container-ID>, as you set the container name with docker run --name mysql

[jsafrane]

To be honest, I do not like the guide. As pointed out by others,it does not use OpenShift mysql and the structure is confusing.

• What is ceph-examples/MYSQL.md good for? Neither of the steps there are needed to deploy mysql on Ceph RBD and they are not Ceph specific at all.
• ceph-examples/mysql_ceph_host does cover Ceph at all, there should be separate example for host_path volumes
• there is lot of redundant information in ceph-examples/mysql_ceph_plugin, mysql_ceph_pvc and mysql_ceph_template chapters. What about one chap. for introduction + preparation, three chapters for pv/pvc/pod creation with only the specific information and one last chapter for checking mysql / cleanup?

And.. will be have three different examples (volume directly in a pod, PV+PVC and application template) for all volume plugins? IMo it would make more sense to teach admins just how to create a PV (= one example for each plugin) + one common example how to use them with a PVC or application template? Because the PVC and the template will be always the same, regardless which volume plugin is used.

I already started with that in https://github.com/openshift/origin/tree/master/examples/wordpress
(patches welcome, I am neither writer nor native speaker, I like your attention to SELinux and security details)

[openshift-bot]

Origin Action Required: Pull request cannot be automatically merged, please rebase your branch from latest HEAD and push again

[danmcp]

Closing due to age and inactivity.