check_kube

This plugin attempts to provide general monitoring for Kubernetes deployments, daemonsets, replicationcontrollers, nodes, as well as Kubernetes components such as etcd, scheduler, and controller

Some examples:
Kubelet check on node1 - ./check_kube.sh -t node -c Ready -n default -o node1
Deployment check for deployment1 - ./check_kube.sh -t deployment -c Available -n default -o deployment1
Daemonset check for flannel - ./check_kube.sh -t daemonset -n kube-system -c status -o kube-flannel-ds-amd64
Component check for etcd-0 - ./check_kube.sh -t componentstatuses -n default -c status -o etcd-0

kubectl and jq are required for this plugin to work

IMPORTANT - the variable KUBECONFIG must be set correctly. For some reason kubectl doesn't find the .kube/config file when executed under Nagios

While this plugin will work with the default admin config, it is highly recommended to create a read only user for Nagios