Add support for resource recommendations using Robusta KRR (derailed#…

…2399) * Adding Robusta KRR as a K9s plugin * Fixed file extension * Updated details for simplicity * Updated Author and dependency details
thejoeejoee · Feb 23, 2024 · e123466 · e123466
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diff --git a/plugins/README.md b/plugins/README.md
@@ -4,16 +4,17 @@ K9s plugins extend the tool to provide additional functionality via actions to f
 
 Following is an example of some of plugin files in this directory. Other files are not listed in this table.
 
-| Plugin-Name        | Description                                                      | Available on Views | Shortcut | Kubectl plugin, external dependencies                                                 |
-|--------------------|------------------------------------------------------------------|--------------------|----------|---------------------------------------------------------------------------------------|
-| debug-container.yml| Add [ephemeral debug container][1]<br>([nicolaka/netshoot][2]) | containers         | Shift-d  |                                                                                       |
-| dive.yml           | Dive image layers                                                | containers         | d        | [Dive](https://github.com/wagoodman/dive)                                             |
-| get-all.yml        | get all resources in a namespace                                 | all                | g        | [Krew](https://krew.sigs.k8s.io/), [ketall](https://github.com/corneliusweig/ketall/) |
-| job_suspend.yml    | Suspends a running cronjob                                       | cronjobs           | Ctrl-s   |                                                                                       |
-| k3d_root_shell.yml | Root shell to k3d container                                      | containers         | Shift-s  | [jq](https://stedolan.github.io/jq/)                                                  |
-| log_stern.yml      | View resource logs using stern                                   | pods               | Ctrl-l   |                                                                                       |
-| log_jq.yml         | View resource logs using jq                                      | pods               | Ctrl-j   | kubectl-plugins/kubectl-jq                                                            |
-| log_full.yml       | get full logs from pod/container                                 | pods/containers    | Ctrl-l   |                                                                                       |
+| Plugin-Name        | Description                                                      | Available on Views       | Shortcut | Kubectl plugin, external dependencies                                                 |
+|--------------------|------------------------------------------------------------------|--------------------------|----------|---------------------------------------------------------------------------------------|
+| debug-container.yml| Add [ephemeral debug container][1]<br>([nicolaka/netshoot][2])   | containers               | Shift-d  |                                                                                       |
+| dive.yml           | Dive image layers                                                | containers               | d        | [Dive](https://github.com/wagoodman/dive)                                             |
+| get-all.yml        | get all resources in a namespace                                 | all                      | g        | [Krew](https://krew.sigs.k8s.io/), [ketall](https://github.com/corneliusweig/ketall/) |
+| job_suspend.yml    | Suspends a running cronjob                                       | cronjobs                 | Ctrl-s   |                                                                                       |
+| k3d_root_shell.yml | Root shell to k3d container                                      | containers               | Shift-s  | [jq](https://stedolan.github.io/jq/)                                                  |
+| resource-recommendations.yml | View recommendations for CPU/Memory requests based on historical data | deployments/daemonsets/statefulsets | Shift-k | [Robusta KRR](https://github.com/robusta-dev/krr)                                             |
+| log_stern.yml      | View resource logs using stern                                   | pods                     | Ctrl-l   |                                                                                       |
+| log_jq.yml         | View resource logs using jq                                      | pods                     | Ctrl-j   | kubectl-plugins/kubectl-jq                                                            |
+| log_full.yml       | get full logs from pod/container                                 | pods/containers          | Ctrl-l   |                                                                                       |
 
 [1]: https://kubernetes.io/docs/tasks/debug/debug-application/debug-running-pod/#ephemeral-container
 [2]: https://github.com/nicolaka/netshoot
diff --git a/plugins/resource-recommendations.yml b/plugins/resource-recommendations.yml
@@ -0,0 +1,28 @@
+plugins:
+# Author: Daniel Rubin
+# Get recommendations for CPU/Memory requests and limits using Robusta KRR
+# Requires Prometheus in the Cluster and Robusta KRR (https://github.com/robusta-dev/krr) on your system
+# Open K9s in deployments/daemonsets/statefulsets view, then:
+# Shift-K to get recommendations
+  krr:
+    shortCut: Shift-K
+    description: Get krr
+    scopes:
+      - deployments
+      - daemonsets
+      - statefulsets
+    command: bash
+    background: false
+    confirm: false
+    args:
+      - -c
+      - |
+        LABELS=$(kubectl get $RESOURCE_NAME $NAME -n $NAMESPACE  --context $CONTEXT  --show-labels | awk '{print $NF}' | awk '{if(NR>1)print}')
+        krr simple --cluster $CONTEXT --selector $LABELS 
+        echo "Press 'q' to exit"
+        while : ; do
+        read -n 1 k <&1
+        if [[ $k = q ]] ; then
+        break
+        fi
+        done