Kubectl plugin manager

I’ve been aware that there is such thing as kubectl plugin manager - krew. But plugins available didn’t make much sense for me, at least until now.

Lastly I’m digging into nginx ingress and do a lot of troubleshooting of generated nginx configuration files,so I found really useful plugin for that - ingress nginx

With krew, installation is a breeze:

kubectl krew install ingress-nginx

For me, most useful command is to get nginx config for specified host:

kubectl ingress-nginx conf -n ingress-nginx --host testaddr.local

    server {
        server_name testaddr.local ;

        listen 80;

        set $proxy_upstream_name "-";
        set $pass_access_scheme $scheme;
        set $pass_server_port $server_port;
        set $best_http_host $http_host;
        set $pass_port $pass_server_port;

        location / {

            set $namespace      "";
            set $ingress_name   "";
            set $service_name   "";
            set $service_port   "0";
            set $location_path  "/";

You can achieve the same using following bash script:

# Get nginx ingress controller pod
NGINX_POD=$(kubectl get pod -n ingress-nginx -l app=ingress-nginx | tail -n1 | cut -f1 -d" ")
# Get nginx configuration with all hosts
kubectl exec -n ingress-nginx $NGINX_POD cat /etc/nginx/nginx.conf > nginx.conf
# Get nginx configuration for specified host
sed -n "/start server \testaddr.local/,/end server \testaddr.local/p" nginx.conf > testaddr.local.txt

But as kubectl plugin, it’s much easier to use and, it seems faster.