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| # MySQL installation with cinder volume plugin | ||
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| Cinder is a Block Storage service for OpenStack. This example shows how it can be used as an attachment mounted to a pod in Kubernets. | ||
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| ### Prerequisites | ||
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| Start kubelet with cloud provider as openstack with a valid cloud config | ||
| Sample cloud_config: | ||
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| ``` | ||
| [Global] | ||
| auth-url=https://os-identity.vip.foo.bar.com:5443/v2.0 | ||
| username=user | ||
| password=pass | ||
| region=region1 | ||
| tenant-id=0c331a1df18571594d49fe68asa4e | ||
| ``` | ||
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| Currently the cinder volume plugin is designed to work only on linux hosts and offers ext4 and ext3 as supported fs types | ||
| Make sure that kubelet host machine has the following executables | ||
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| ``` | ||
| /bin/lsblk -- To Find out the fstype of the volume | ||
| /sbin/mkfs.ext3 and /sbin/mkfs.ext4 -- To format the volume if required | ||
| /usr/bin/udevadm -- To probe the volume attached so that a symlink is created under /dev/disk/by-id/ with a virtio- prefix | ||
| ``` | ||
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| Ensure cinder is installed and configured properly in the region in which kubelet is spun up | ||
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| ### Example | ||
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| Create a cinder volume Ex: | ||
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| `cinder create --display-name=test-repo 2` | ||
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| Use the id of the cinder volume created to create a pod [definition](mysql.yaml) | ||
| Create a new pod with the definition | ||
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| `cluster/kubectl.sh create -f examples/mysql-cinder-pd/mysql.yaml` | ||
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| This should now | ||
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| 1. Attach the specified volume to the kubelet's host machine | ||
| 2. Format the volume if required (only if the volume specified is not already formatted to the fstype specified) | ||
| 3. Mount it on the kubelet's host machine | ||
| 4. Spin up a container with this volume mounted to the path specified in the pod definition | ||
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| <!-- BEGIN MUNGE: GENERATED_ANALYTICS --> | ||
| []() | ||
| <!-- END MUNGE: GENERATED_ANALYTICS --> | ||
| This file has moved to [/~https://github.com/kubernetes/examples/blob/master/staging/mysql-cinder-pd/README.md](/~https://github.com/kubernetes/examples/blob/master/staging/mysql-cinder-pd/README.md) |
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| This is a simple web server pod which serves HTML from an Cinder volume. | ||
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| Create a volume in the same tenant and zone as your node. | ||
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| Add your volume information in the pod description file cinder-web.yaml then create the pod: | ||
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| ```shell | ||
| $ kubectl create -f examples/volumes/cinder/cinder-web.yaml | ||
| ``` | ||
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| Add some data to the volume if is empty: | ||
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| ```sh | ||
| $ echo "Hello World" >& /var/lib/kubelet/plugins/kubernetes.io/cinder/mounts/{Volume ID}/index.html | ||
| ``` | ||
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| You should now be able to query your web server: | ||
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| ```sh | ||
| $ curl <Pod IP address> | ||
| $ Hello World | ||
| ``` | ||
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| <!-- BEGIN MUNGE: GENERATED_ANALYTICS --> | ||
| []() | ||
| <!-- END MUNGE: GENERATED_ANALYTICS --> | ||
| This file has moved to [/~https://github.com/kubernetes/examples/blob/master/staging/volumes/cinder/README.md](/~https://github.com/kubernetes/examples/blob/master/staging/volumes/cinder/README.md) |