Upgrading Clusters Non-disruptively

During a non-disruptive upgrade, each node in a cluster is upgraded one at a time.

Procedure

Download the latest Hedvig binaries, as described in Downloading Hedvig Software.
Update the deployment server, as described in Setting Up Hedvig Deployment Servers.
From the Hedvig Deployment Server:
```
export HV_PUBKEY=1
```
The next step depends on how much of the cluster you want to upgrade, from the entire cluster to only a part of it.
- Upgrade entire cluster: This procedure upgrades the entire cluster, one node at a time, then the HA storage proxies, and then the non-HA storage proxies. If a storage node has an error, the script stops and prompts you to continue.
```
 
/opt/hedvig/bin/upgrade_ndu.pl --cluster <cluster_name> --auto
```
- Upgrade storage nodes only:
```
 
/opt/hedvig/bin/upgrade_ndu.pl --cluster <cluster_name> --node –-auto
```
- Upgrade HA storage proxies only:
```
 
/opt/hedvig/bin/upgrade_ndu.pl --cluster <cluster_name> --ha –-auto
```
- Upgrade non-HA storage proxies only:
```
 
/opt/hedvig/bin/upgrade_ndu.pl --cluster <cluster_name> --nonha --auto
```
- Upgrade specific storage node only:
```
 
/opt/hedvig/bin/upgrade_ndu.pl --cluster <cluster_name> <nodefqdn> --auto
```
- Upgrade specific HA storage proxy pair:
```
 
/opt/hedvig/bin/upgrade_ndu.pl --cluster <cluster_name> <proxy_name1> <proxy_name2> --auto
```