Adding some k8s related tools

fix-kubectl

@@ -0,0 +1,70 @@
+#! /usr/bin/env bash
+if [[ "$0" == "$SHELL" ]]; then
+
+    if [[ -z "FIX_KUBECTL_RECALL" ]]; then
+        unset kubectl 2>/dev/null || unalias kubectl 2>/dev/null || true
+    
+        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
+    fi
+    
+    [[ 'function' == $(type -t kubectl-fix) ]] && unset kubectl-fix
+    
+    [[ ! -r "$HOME/.kube/config" ]] \
+    || export KUBECONFIG="${KUBECONFIG:-$HOME/.kube/config}"
+    
+    if [[ -n "$(type -t 'k3s')" && -z "$(type -t 'kubectl')" ]]; then
+        if [[ -r "${KUBECONFIG}" ]]; then
+            kubectl() { k3s kubectl "${@}"; }
+        elif [[ -n "${KUBECONFIG}" && -e "${KUBECONFIG}" ]]; then
+            eval "
+            kubectl-fix() {
+                mkdir \"$HOME/.kube\" -p
+                if [[ -e \"\${KUBECONFIG}\" && ! -r \"$HOME/.kube/config\" ]]; then
+                    sudo install --mod 600 --owner \"$USER\" \"\${KUBECONFIG}\" \"$HOME/.kube/config\"
+                    unset KUBECONFIG
+                fi
+                FIX_KUBECTL_RECALL=1 . \"$BASH_SOURCE\"
+            }"
+        fi
+    fi
+    
+    if [[ -n "$(type -t 'kubectl')" ]]; then
+    
+        . <( kubectl completion ${SHELL##*/} )
+    
+        if [[ -n "$(type -t 'kubectl-cnpg')" ]]; then
+            . <( kubectl cnpg completion ${SHELL##*/} )
+	else
+	    CNPG_VER="${CNPG_VER:-1.20.2}"
+	    GH_URL=https://github.com/cloudnative-pg/cloudnative-pg
+	    DEB_FILE="kubectl-cnpg_${CNPG_VER}_linux_x86_64.deb"
+	    URL=${GH_URL}/releases/download/v${CNPG_VER}/${DEB_FILE}
+	    printf '%s\n' \
+		'To download adn install cnpg kubectl plugin, run:' \
+	        "    wget ${URL}" \
+	        "    sudo dpkg -i $DEB_FILE"
+
+        fi
+    
+        if [[ -n "$(type -t 'k3s')" ]]; then
+            . <( k3s completion ${SHELL##*/} )
+        fi
+    
+        if [[ -n "$(type -t 'helm')" ]]; then
+            . <( helm completion ${SHELL##*/} 2>/dev/null )
+        fi
+    
+        kg() {
+    	kubectl get ${NS:+--namespace=}${NS:---all-namespaces} "${@}" | { sed -u 1q; sort; }
+        }
+    fi
+elif [[ "$1" == '-' ]]; then
+    cat $0
+else
+    SCRIPT_NAME="$(basename $0)"
+    printf '%s\n' \
+        "It seems $SCRIPT_NAME was invoked as a script. It should be sourced instead." \
+	'The easiest way is to call it like this:' \
+	"    $ . <( $SCRIPT_NAME - ) # Note the '-' after the script's name" \
+        ''
+fi