Kubernetes Interview Questions and Answers
Question - 81 : - What is the use of kube-controller-manager?
Answer - 81 : -
It is the Kubernetes Controller Manager. The kube-controller-manager is a daemon that embeds the core control loops which regulate the system state, and it is a non-terminating loop.
Question - 82 : - What are the components of a Kubernetes Master?
Answer - 82 : -
The components of the Kubernetes Master include the API server, the controller manager, the Scheduler, and the etcd components. The Kubernetes Master components are responsible for running and managing the Kubernetes cluster.
Question - 83 : - What are the different types of services in Kubernetes?
Answer - 83 : -
The different types of services that support Kubernetes are as follows:
- Cluster IP: It exposes the services on cluster internal IP and makes the services reachable within the cluster only.
- Node port: It exposes the services on each node’s IP at the static port.
- Load balancer: It provides services externally using a cloud provider’s load balancer. It creates the service to route the external load balancer automatically.
- External name: It navigates the service to the contents of the external field by returning the CNAME record by its value.
Question - 84 : - Mention the various container resource monitoring tools?
Answer - 84 : -
The various container monitoring tools are as follows:
- Grafana
- Heapster
- CAdvisor
- InfluxDB
- Prometheus
Question - 85 : - What is Heapster?
Answer - 85 : -
Heapster is a performance monitoring and metric collection system. It provides cluster-wide data aggregation by running with a kubelet on each node. It allows for the collection of metrics, pods, workloads, containers, and other signals that are generated by the clusters.
Question - 86 : - Explain Daemon sets?
Answer - 86 : -
A daemon set ensures that all the eligible nodes run a copy of the pod runs only once in a host. It was created and scheduled by the daemon controller. It is a process that runs in the background and does not produce any visible output.
Question - 87 : - What are the uses of Daemon sets?
Answer - 87 : -
The uses of Daemon sets are as follows:
- It runs cluster storage such as ceph, glusterd on each node.
- It runs the logs collection of daemons on every node such as fluentd or filebeat.
- It runs node monitoring on every node.
Question - 88 : - Explain the Replica set?
Answer - 88 : -
A Replica set is used to maintain a stable set of replica pods. It is used to specify the available number of identical pods. It was also considered as a replacement for the replication controller sometimes.
Question - 89 : - What is ETCD in Kubernetes?
Answer - 89 : -
ETCD is the distributed key-value store. It stores and replicates the configuring data of the Kubernetes cluster.
Question - 90 : - Explain the Ingress controller?
Answer - 90 : -
An ingress controller is a pod that acts as an inbound traffic handler. It is responsible for reading the ingress resource information and processing the data accordingly.