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add iscsi volume plugin

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Signed-off-by: Huamin Chen <hchen@redhat.com>
This commit is contained in:
Huamin Chen
2015-03-13 17:31:13 -04:00
parent ed2192a61e
commit 7a82af31de
25 changed files with 1104 additions and 6 deletions
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9
examples/examples_test.go
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@@ -175,6 +175,12 @@ func TestExampleObjectSchemas(t *testing.T) {
"claim-02": &api.PersistentVolumeClaim{},
"claim-03": &api.PersistentVolumeClaim{},
},
"../examples/iscsi/v1beta1": {
"iscsi": &api.Pod{},
},
"../examples/iscsi/v1beta3": {
"iscsi": &api.Pod{},
},
}
for path, expected := range cases {
@@ -182,7 +188,7 @@ func TestExampleObjectSchemas(t *testing.T) {
err := walkJSONFiles(path, func(name, path string, data []byte) {
expectedType, found := expected[name]
if !found {
t.Errorf("%s does not have a test case defined", path)
t.Errorf("%s: %s does not have a test case defined", path, name)
return
}
tested += 1
@@ -210,6 +216,7 @@ func TestReadme(t *testing.T) {
paths := []string{
"../README.md",
"../examples/walkthrough/README.md",
"../examples/iscsi/README.md",
}
for _, path := range paths {

51
examples/iscsi/README.md Normal file
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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.
Install iSCSI initiator on the node:
# yum -y install iscsi-initiator-utils
then edit */etc/iscsi/initiatorname.iscsi* and */etc/iscsi/iscsid.conf* to match your iSCSI target configuration.
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.
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.
Once your pod is created, run it on the Kubernetes master:
#cluster/kubectl.sh create -f your_new_pod.json
Here is my command and output:
```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
```
On the Kubernetes node, I got these in mount output
```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)
```
If you ssh to that machine, you can run `docker ps` to see the actual pod.
```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
```
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]
```

59
examples/iscsi/v1beta1/iscsi.json Normal file
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@@ -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
}
}
}
]
}
}
}

54
examples/iscsi/v1beta3/iscsi.json Normal file
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@@ -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
}
}
]
}
}