add node restart sleep delay

README.md

@@ -1,6 +1,6 @@
 # kubectl-node-restart
 
-`kubectl-node-restart` is a [kubectl plugin](https://kubernetes.io/docs/tasks/extend-kubectl/kubectl-plugins/) that sequentially and gracefully performs a rolling restart of nodes within a Kubernetes cluster
+`kubectl-node-restart` is a [kubectl plugin](https://kubernetes.io/docs/tasks/extend-kubectl/kubectl-plugins/) that sequentially and gracefully performs a rolling restart of Nodes within a Kubernetes cluster
 
 ![using kubectl-node-restart plugin](demo/usage.gif)
 
@@ -23,7 +23,7 @@
 - restart only specific nodes selected through labels
 
 ```bash
-    kubectl node-restart --selector=kubernetes.io/master
+    kubectl node-restart --selector node-role.kubernetes.io/master
 ```
 
 - perform a dry-run
@@ -37,3 +37,9 @@
 ```bash
     kubectl node-restart all --force
 ```
+
+- add a delay of 120seconds between node restarts
+
+```bash
+    kubectl node-restart all --sleep 120
+```

node-restart.sh

@@ -1,14 +1,14 @@
 #!/bin/bash
 
 image='alpine:3.9'
-nodesleep=10   #Time between node restarts - give pods time to start up
+nodesleep=20        #Time delay between node restarts - give pods time to start up
 force=false
 dryrun=false
 blue='\033[0;34m'
 nocolor='\033[0m'
 
 function print_usage() {
-  echo "Usage: $0 [<options>]"
+  echo "Usage: kubectl node-restart [<options>]"
   echo ""
   echo "all                                 Restarts all nodes within the cluster"
   echo ""
@@ -18,6 +18,8 @@ function print_usage() {
   echo ""
   echo "-d|--dry-run                        Just print what to do; don't actually do it"
   echo ""
+  echo "-s|--sleep                          Sleep delay between restarting Nodes (default 20s)"
+  echo ""
   echo "-h|--help                           Print usage and exit"
 }
 
@@ -43,6 +45,11 @@ do
     dryrun=true
     shift
     ;;
+    -s|--sleep)
+    nodesleep="$2"
+    shift
+    shift
+    ;;
     -h|--help)
     print_usage
     exit 0

node-restart.yaml

@@ -1,32 +1,27 @@
 apiVersion: krew.googlecontainertools.github.com/v1alpha2
 kind: Plugin
 metadata:
-  name: node-restart               # plugin name must match your manifest file name (e.g. foo.yaml)
+  name: node-restart
 spec:
-  version: "v0.0.1"       # required, must be in semver format, prefixed with "v"
+  version: "v0.0.2"
   platforms:
-  # specify installation script for linux and darwin (macOS)
-  - selector:             # a regular Kubernetes selector
+  - selector:
       matchExpressions:
       - {key: os, operator: In, values: [darwin, linux]}
-    # url for downloading the package archive:
-    uri: https://github.com/mnrgreg/kubectl-node-restart/releases/v0.0.1.zip
-    # sha256sum of the above archive file:
-    sha256: "db32ebd8b6caf574036a12f97ee281905daf8da25ff6e4554edf71d7af473148"
-    # copy the used files out of the zip archive, defaults to `[{from: "*", to: "."}]`
+    uri: https://github.com/MnrGreg/kubectl-node-restart/releases/download/v0.0.2/v0.0.2.zip
+    sha256: "44db0eee9603085652837d26c5352287864f158b557f78ae19325724640535f8"
     files:
-    - from: "*.sh" # path to the files extracted from archive
-      to:  "."                 # '.' refers to the root of plugin install directory
-    - from: "LICENSE"   # always install your LICENSE file
+    - from: "*.sh"
+      to:  "."
+    - from: "LICENSE"
       to: "."
-    bin: "kubectl-node-restart"  # path to the plugin executable after copying files above
-  shortDescription: >-    # short description gets truncated at ~50 chars
-    Restarts K8S nodes sequentially & gracefully
+    bin: "node-restart.sh"
+  shortDescription: >-
+    Restart Kubernetes Nodes sequentially & gracefully
   homepage: https://github.com/mnrgreg/kubectl-node-restart
-  # (optional) use caveats field to show post-installation recommendations
   caveats: |
-    This plugin requires execution with cluster-admin priveleges.
+    Execution of this plugin requires Kubernetes cluster-admin Rolebindings.
   description: |
     This plugin performs a sequential, rolling restart of selected nodes by first
-    draining each node, then running a kubernetes job to reboot each host, and
-    finally uncordoning each node when Ready. 
+    Draining each node, then running a Kubernetes Job to reboot each node, and
+    finally Uncordoning each node when Ready.