Added docs for upgrade agent (#141)

* Added docs for upgrade agent

Signed-off-by: Saranya-jena <[email protected]>

Author: Saranya Jena

website/docs/assets/user-guides/upgrade/upgrade-agent.png

@@ -31,3 +31,19 @@ To upgrade Litmus ChaosCenter from 2.0.0-Beta9 to 2.0.0, you can follow these st
 > Note: This step is not required for upgrading 2.0.0-Beta9 to 2.0.0
 
 To upgrade the DB schema, make sure to delete the PV before re-installing ChaosCenter.
+
+## Upgrade ChaosAgent
+To upgrade your ChaosAgent, you can follow these steps:
+
+1. If an upgrade is available, you will get an option to upgrade your agent in the ChaosCenter. Upon clicking on the upgrade option, a modal will pop up providing you the litmusctl command which you can execute and your ChaosAgent will be upgraded.
+
+<img src={require('../assets/user-guides/upgrade/upgrade-agent.png').default} width="800" />
+
+
+Alternatively you can run the following command using litmusctl in the cluster containing the agent by providing `<CLUSTER_ID>` and `<PROJECT_ID>`.
+
+```
+litmusctl upgrade agent --cluster-id="<CLUSTER_ID>" --project-id="<PROJECT_ID>"
+```
+
+> Note: v0.5.0 of [litmusctl](https://github.com/litmuschaos/litmusctl/blob/master/README.md) is required.

website/docs/user-guides/upgrade.md

@@ -31,3 +31,19 @@ To upgrade Litmus ChaosCenter from 2.1.0 to 2.2.0, you can follow these steps:
 > Note: This step is not required for upgrading 2.1.0 to 2.2.0
 
 To upgrade the DB schema, make sure to delete the PV before re-installing ChaosCenter.
+
+## Upgrade ChaosAgent
+To upgrade your ChaosAgent, you can follow these steps:
+
+1. If an upgrade is available, you will get an option to upgrade your agent in the ChaosCenter. Upon clicking on the upgrade option, a modal will pop up providing you the litmusctl command which you can execute and your ChaosAgent will be upgraded.
+
+<img src={require('../assets/user-guides/upgrade/upgrade-agent.png').default} width="800" />
+
+
+Alternatively you can run the following command using litmusctl in the cluster containing the agent by providing `<CLUSTER_ID>` and `<PROJECT_ID>`.
+
+```
+litmusctl upgrade agent --cluster-id="<CLUSTER_ID>" --project-id="<PROJECT_ID>"
+```
+
+> Note: v0.5.0 of [litmusctl](https://github.com/litmuschaos/litmusctl/blob/master/README.md) is required.