Adds completion for rsh

README.md

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+# my kubectl plugin scripts
+
+To install
+```
+git https://git.rre.nu/jonas/kube-plugin.git "$HOME/kube-plugin"
+export PATH=$PATH:$HOME/git/kube-plugin
+```
+
+Verify that the scripts are picked up in `kubectl`
+```
+kubectl plugin list
+```
+
+## kubectl-rsh
+Creates a pod on the node and executes a shell on that node.
+
+You need cluster admin rights and privileged pod execution rights
+
+```
+Usage:
+  kubectl rsh [nodeName]
+```
+
+### Variables
+| Name | Default | Desciption |
+|------|---------|------------|
+| KUBECTL_RSH_IMAGE | docker.io/library/busybox | The image used by the pod creating the shell |
+| KUBECTL_RSH_IMAGE_TAG | latest | Image tag to use |
+| KUBECTL_RSH_NAMESPACE | default | Namespace to create the rsh pod in |
+| KUBECTL_RSH_POD_CREATE_TIMEOUT | 3 | Minutes to wait before failing to create pod |
+
+## kubectl-deprecated_api
+Lists APIs flagged as deprecated
+```
+Usage:
+  kubectl deprecated-api
+```

kubectl-deprecated_api

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+#!/usr/bin/env bash
+
+if ! command -v prom2json > /dev/null; then
+    echo "You need prom2json to use this command"
+    exit 1
+fi
+kubectl get --raw /metrics | prom2json | jq -c '.[] | select(.name=="apiserver_requested_deprecated_apis").metrics[].labels' | column -t -s'{}[],"'

kubectl-rsh

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+#!/usr/bin/env bash
+set -aeou pipefail
+
+SCRIPT_VERSION="0.1"
+KUBECTL_RSH_IMAGE="${KUBECTL_RSH_IMAGE:-docker.io/library/busybox}"
+KUBECTL_RSH_IMAGE_TAG="${KUBECTL_RSH_IMAGE_TAG:-latest}"
+KUBECTL_RSH_NAMESPACE="${KUBECTL_RSH_NAMESPACE:-default}"
+KUBECTL_RSH_POD_CREATE_TIMEOUT="${KUBECTL_RSH_POD_CREATE_TIMEOUT:-3}"
+
+
+function print_help(){
+    cat << EOF
+Creates a pod on the node and executes a shell on that node.
+You need cluster admin rights and privileged pod execution rights
+
+Usage:
+  kubectl rsh [nodeName]
+EOF
+}
+
+if [[ "$1" == "version" ]];then
+    echo "$SCRIPT_VERSION"
+    exit 0
+fi
+
+if [[ "$1" == "--help" ]]; then
+  print_help
+  exit 0
+fi
+
+NODE="$1"
+
+POD=$( kubectl create -n "$KUBECTL_RSH_NAMESPACE" -o name -f - <<EOF
+apiVersion: v1
+kind: Pod
+metadata:
+  generateName: rsh-node-
+  labels:
+    rre.nu/kubectl-plugin: rsh-node
+spec:
+  nodeName: $NODE
+  containers:
+  - name: rsh-node
+    image: ${KUBECTL_RSH_IMAGE}:${KUBECTL_RSH_IMAGE_TAG}
+    imagePullPolicy: IfNotPresent
+    command: ["chroot", "/host"]
+    tty: true
+    stdin: true
+    stdinOnce: true
+    securityContext:
+      privileged: true
+    volumeMounts:
+    - name: host
+      mountPath: /host
+  volumes:
+  - name: host
+    hostPath:
+      path: /
+  hostNetwork: true
+  hostIPC: true
+  hostPID: true
+  restartPolicy: Never
+  tolerations:
+    - operator: "Exists"
+EOF
+)
+
+echo "Creating $POD in $KUBECTL_RSH_NAMESPACE namespace"
+
+function remove_pod(){
+    echo "Removing $POD in $KUBECTL_RSH_NAMESPACE namespace"
+    kubectl -n "$KUBECTL_RSH_NAMESPACE" delete "$POD" --wait=false
+}
+
+trap remove_pod EXIT
+
+echo "Waiting for pod to be ready..."
+kubectl wait -n "$KUBECTL_RSH_NAMESPACE" --for=condition=Ready --timeout "${KUBECTL_RSH_POD_CREATE_TIMEOUT}m" "$POD" >/dev/null
+
+kubectl attach -n "$KUBECTL_RSH_NAMESPACE" -it "$POD"

kubectl_complete-rsh

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+#!/usr/bin/env bash
+
+# If we are completing a flag, use Cobra's builtin completion system.
+# To know if we are completing a flag we need the last argument starts with a `-` and does not contain an `=`
+args=("$@")
+lastArg=${args[((${#args[@]}-1))]}
+if [[ "$lastArg" == -* ]]; then
+   if [[ "$lastArg" != *=* ]]; then
+      kubectl ns __complete "$@"
+   fi
+else
+   # TODO Make sure we are not completing the value of a flag.
+   # TODO Only complete a single argument.
+   # Both are pretty hard to do in a shell script.  The better way to do this would be to let
+   # Cobra do all the completions by using `cobra.ValidArgsFunction` in the program.
+   # But the below, although imperfect, is a nice example for plugins that don't use Cobra.
+
+   kubectl get nodes --no-headers -o custom-columns=":metadata.name"
+
+   # Turn off file completion.  See the ShellCompDirective documentation within
+   # https://github.com/spf13/cobra/blob/main/shell_completions.md#completion-of-nouns
+   echo :4
+fi