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add iscsi volume plugin #5506
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,51 @@ | ||
| # How to Use it? | ||
| Here is my setup to setup Kubernetes with iSCSI persistent storage. I use Fedora 21 on Kubernetes node. | ||
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| Install iSCSI initiator on the node: | ||
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| # yum -y install iscsi-initiator-utils | ||
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| then edit */etc/iscsi/initiatorname.iscsi* and */etc/iscsi/iscsid.conf* to match your iSCSI target configuration. | ||
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| I mostly follow these [instructions](http://www.server-world.info/en/note?os=Fedora_21&p=iscsi&f=2) to setup iSCSI initiator and these [instructions](http://www.server-world.info/en/note?os=Fedora_21&p=iscsi) to setup iSCSI target. | ||
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| Once you have installed iSCSI initiator and new Kubernetes, you can create a pod based on my example *iscsi.json*. In the pod JSON, you need to provide *targetPortal* (the iSCSI target's **IP** address and *port* if not the default port 3260), target's *iqn*, *lun*, and the type of the filesystem that has been created on the lun, and *readOnly* boolean. | ||
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| Once your pod is created, run it on the Kubernetes master: | ||
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| #cluster/kubectl.sh create -f your_new_pod.json | ||
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| Here is my command and output: | ||
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| ```console | ||
| # cluster/kubectl.sh create -f examples/iscsi/v1beta3/iscsi.json | ||
| # cluster/kubectl.sh get pods | ||
| POD IP CONTAINER(S) IMAGE(S) HOST LABELS STATUS CREATED | ||
| iscsi 172.17.0.5 iscsipd-ro kubernetes/pause fed-minion/10.16.154.75 <none> Running About a minute | ||
| iscsipd-rw kubernetes/pause | ||
| ``` | ||
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| On the Kubernetes node, I got these in mount output | ||
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| ```console | ||
| #mount |grep kub | ||
| /dev/sdb on /var/lib/kubelet/plugins/kubernetes.io/iscsi/iscsi/10.16.154.81:3260/iqn.2014-12.world.server:storage.target1/lun/0 type ext4 (ro,relatime,stripe=1024,data=ordered) | ||
| /dev/sdb on /var/lib/kubelet/pods/4ab78fdc-b927-11e4-ade6-d4bed9b39058/volumes/kubernetes.io~iscsi/iscsipd-ro type ext4 (ro,relatime,stripe=1024,data=ordered) | ||
| /dev/sdc on /var/lib/kubelet/plugins/kubernetes.io/iscsi/iscsi/10.16.154.81:3260/iqn.2014-12.world.server:storage.target1/lun/1 type xfs (rw,relatime,attr2,inode64,noquota) | ||
| /dev/sdc on /var/lib/kubelet/pods/4ab78fdc-b927-11e4-ade6-d4bed9b39058/volumes/kubernetes.io~iscsi/iscsipd-rw type xfs (rw,relatime,attr2,inode64,noquota) | ||
| ``` | ||
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| If you ssh to that machine, you can run `docker ps` to see the actual pod. | ||
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| ```console | ||
| # docker ps | ||
| CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES | ||
| cc9bd22d9e9d kubernetes/pause:latest "/pause" 3 minutes ago Up 3 minutes k8s_iscsipd-rw.12d8f0c5_iscsipd.default.etcd_4ab78fdc-b927-11e4-ade6-d4bed9b39058_e3f49dcc | ||
| ``` | ||
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| Run *docker inspect* and I found the Containers mounted the host directory into the their */mnt/iscsipd* directory. | ||
| ```console | ||
| #docker inspect --format "\{\{\.Volumes\}\}" cc9bd22d9e9d | ||
| map[/mnt/iscsipd:/var/lib/kubelet/pods/4ab78fdc-b927-11e4-ade6-d4bed9b39058/volumes/kubernetes.io~iscsi/iscsipd-rw /dev/termination-log:/var/lib/kubelet/pods/4ab78fdc-b927-11e4-ade6-d4bed9b39058/containers/iscsipd-rw/cc9bd22d9e9db3c88a150cadfdccd86e36c463629035b48bdcfc8ec534be8615] | ||
| ``` | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| { | ||
| "id": "iscsipd", | ||
| "kind": "Pod", | ||
| "apiVersion": "v1beta1", | ||
| "desiredState": { | ||
| "manifest": { | ||
| "version": "v1beta1", | ||
| "id": "iscsipd", | ||
| "containers": [ | ||
| { | ||
| "name": "iscsipd-ro", | ||
| "image": "kubernetes/pause", | ||
| "volumeMounts": [ | ||
| { | ||
| "mountPath": "/mnt/iscsipd", | ||
| "name": "iscsipd-ro" | ||
| } | ||
| ] | ||
| }, | ||
| { | ||
| "name": "iscsipd-rw", | ||
| "image": "kubernetes/pause", | ||
| "volumeMounts": [ | ||
| { | ||
| "mountPath": "/mnt/iscsipd", | ||
| "name": "iscsipd-rw" | ||
| } | ||
| ] | ||
| } | ||
| ], | ||
| "volumes": [ | ||
| { | ||
| "name": "iscsipd-ro", | ||
| "source": { | ||
| "iscsi": { | ||
| "targetPortal": "10.16.154.81:3260", | ||
| "iqn": "iqn.2014-12.world.server:storage.target01", | ||
| "lun": 0, | ||
| "fsType": "ext4", | ||
| "readOnly": true | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| "name": "iscsipd-rw", | ||
| "source": { | ||
| "iscsi": { | ||
| "targetPortal": "10.16.154.81:3260", | ||
| "iqn": "iqn.2014-12.world.server:storage.target01", | ||
| "lun": 1, | ||
| "fsType": "xfs", | ||
| "readOnly": false | ||
| } | ||
| } | ||
| } | ||
| ] | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| { | ||
| "apiVersion": "v1beta3", | ||
| "id": "iscsipd", | ||
| "kind": "Pod", | ||
| "metadata": { | ||
| "name": "iscsi" | ||
| }, | ||
| "spec": { | ||
| "containers": [ | ||
| { | ||
| "name": "iscsipd-ro", | ||
| "image": "kubernetes/pause", | ||
| "volumeMounts": [ | ||
| { | ||
| "mountPath": "/mnt/iscsipd", | ||
| "name": "iscsipd-ro" | ||
| } | ||
| ] | ||
| }, | ||
| { | ||
| "name": "iscsipd-rw", | ||
| "image": "kubernetes/pause", | ||
| "volumeMounts": [ | ||
| { | ||
| "mountPath": "/mnt/iscsipd", | ||
| "name": "iscsipd-rw" | ||
| } | ||
| ] | ||
| } | ||
| ], | ||
| "volumes": [ | ||
| { | ||
| "name": "iscsipd-ro", | ||
| "iscsi": { | ||
| "targetPortal": "10.16.154.81:3260", | ||
| "iqn": "iqn.2014-12.world.server:storage.target01", | ||
| "lun": 0, | ||
| "fsType": "ext4", | ||
| "readOnly": true | ||
| } | ||
| }, | ||
| { | ||
| "name": "iscsipd-rw", | ||
| "iscsi": { | ||
| "targetPortal": "10.16.154.81:3260", | ||
| "iqn": "iqn.2014-12.world.server:storage.target01", | ||
| "lun": 1, | ||
| "fsType": "xfs", | ||
| "readOnly": false | ||
| } | ||
| } | ||
| ] | ||
| } | ||
| } |
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nit: Can you split this into a separate shell output to improve readability?
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@rootfs: Ping
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@vishh pong, yes :)