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Update driver.md

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Sheng Yang 2019-04-01 19:03:26 -07:00 committed by GitHub
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@ -6,6 +6,8 @@ Longhorn can be used in Kubernetes to provide persistent storage through either
Noted that the volume created and used through one driver won't be recongized by Kubernetes using the other driver. So please don't switch driver (e.g. during upgrade) if you have existing volumes created using the old driver. If you really want to switch driver, see [here](upgrade.md#migrating-between-flexvolume-and-csi-driver) for instructions.
## CSI
### Requirement for the CSI driver
1. Kubernetes v1.10+
@ -29,6 +31,27 @@ The `Server Version` should be `v1.10` or above.
2. The result of [environment check script](#environment-check-script) should contain `MountPropagation is enabled!`.
### Environment check script
We've wrote a script to help user to gather enough information about the factors
Before installing, run:
```
curl -sSfL https://raw.githubusercontent.com/rancher/longhorn/master/scripts/environment_check.sh | bash
```
Example result:
```
daemonset.apps/longhorn-environment-check created
waiting for pods to become ready (0/3)
all pods ready (3/3)
MountPropagation is enabled!
cleaning up...
daemonset.apps "longhorn-environment-check" deleted
clean up complete
```
### Successful CSI deployment example
```
$ kubectl -n longhorn-system get pod
@ -52,12 +75,16 @@ longhorn-manager-snb9t 1/1 Running 0 9d
longhorn-ui-67b9b6887f-n7x9q 1/1 Running 0 9d
```
For more information on CSI configuration, see [here](csi-config.md).
## Flexvolume
### Requirement for the FlexVolume driver
1. Kubernetes v1.8+
2. Make sure `curl`, `findmnt`, `grep`, `awk` and `blkid` has been installed in the every node of the Kubernetes cluster.
#### Flexvolume driver directory
### Flexvolume driver directory
Longhorn now has ability to auto detect the location of Flexvolume directory.
@ -70,27 +97,6 @@ directory, as e.g. `/var/lib/kubelet/volumeplugins:/var/lib/kubelet/volumeplugin
2. The kubelet setting for the Flexvolume driver directory must be the same across all the nodes.
2.1. Longhorn doesn't support heterogeneous setup at the moment.
### Environment check script
We've wrote a script to help user to gather enough information about the factors
Before installing, run:
```
curl -sSfL https://raw.githubusercontent.com/rancher/longhorn/master/scripts/environment_check.sh | bash
```
Example result:
```
daemonset.apps/longhorn-environment-check created
waiting for pods to become ready (0/3)
all pods ready (3/3)
MountPropagation is enabled!
cleaning up...
daemonset.apps "longhorn-environment-check" deleted
clean up complete
```
### Successful Flexvolume deployment example
```
# kubectl -n longhorn-system get pod