What is PCF in DevOps?

What is PCF in DevOps?

Pivotal Cloud Foundry, also known as PCF, is a distribution of the open-source Cloud Foundry platform that includes additional features and services that expand the capabilities of Cloud Foundry and make it easier to use.

What is PCF?

PCF is a cloud native platform for deploying next-generation apps. Based on open source technology, PCF enables enterprises to rapidly deliver new experiences to their customers. PCF can be deployed on-premises and on many cloud providers to give enterprises a hybrid and multi-cloud platform.

What is PCF in AWS?

This Quick Start automatically deploys Tanzu Application Service (TAS)—previously known as Pivotal Cloud Foundry (PCF)—into your Amazon Web Services (AWS) account. TAS is a cloud-native platform for deploying and operating modern applications. You can build your applications in Spring or .

Does Cloudry use Docker?

For more information about volume services, see Using an External File System (Volume Services), To mitigate security concerns, Cloud Foundry recommends that you run only trusted Docker containers on the platform. By default, the Cloud Controller does not allow Docker-based apps to run on the platform.

What is Cloud Foundry vs Kubernetes?

As Cloud Foundry Foundation says, “Cloud Foundry is a dollhouse, and Kubernetes is a box of building blocks from which you can create a dollhouse”. Cloud Foundry shares features with Kubernetes but is a higher-level abstraction of cloud-native application deployment.

Is Kubernetes a SAAS?

Kubernetes leverages the simplicity of Platform as a Service (PaaS) when used on the Cloud. It utilises the flexibility of Infrastructure as a Service (IaaS) and enables portability and simplified scaling; empowering infrastructure vendors to provision robust Software as a Service (Saas) business models.

Is Kubernetes a server?

You can say that Kubernetes/OpenShift is the new Linux or even that “Kubernetes is the new application server.” But the fact is that an application server/runtime + OpenShift/Kubernetes + Istio has become the “de facto” cloud-native application platform! Kubernetes and container management. Microservices.

What is POD in Kubernetes?

Pods are the smallest, most basic deployable objects in Kubernetes. A Pod represents a single instance of a running process in your cluster. Pods contain one or more containers, such as Docker containers. When a Pod runs multiple containers, the containers are managed as a single entity and share the Pod’s resources.

What is KUBE proxy?

kube-proxy is a network proxy that runs on each node in your cluster, implementing part of the Kubernetes Service concept. kube-proxy maintains network rules on nodes. These network rules allow network communication to your Pods from network sessions inside or outside of your cluster.

How do I know if Kube proxy is running?

You can check the metrics available for your version in the Kubernetes repo (link for the 1.18. 3 version). Kube proxy nodes are up: The principal metric to check is if kube-proxy is running in each of the working nodes.

How do I turn off Kube proxy?

There is no way to stop it other than kill or ^C (if not in background). Then run sudo kill -9 to kill the process.

What is KUBE Mark MASQ?

KUBE-MARK-MASQ adds a Netfilter mark to packets destined for the hello-world service which originate outside the cluster’s network. Packets with this mark will be altered in a POSTROUTING rule to use source network address translation (SNAT) with the node’s IP address as their source IP address.

How Kubernetes Load Balancer works?

The most basic type of load balancing in Kubernetes is actually load distribution, which is easy to implement at the dispatch level. Kubernetes uses two methods of load distribution, both of them operating through a feature called kube-proxy, which manages the virtual IPs used by services.

What task is Kubeproxy responsible for?

Kube-proxy: The Kube-proxy is an implementation of a network proxy and a load balancer, and it supports the service abstraction along with other networking operation. It is responsible for routing traffic to the appropriate container based on IP and port number of the incoming request.

Which ports does Kubernetes use?

By default, the Kubernetes API server serves HTTP on 2 ports:

• localhost port: is intended for testing and bootstrap, and for other components of the master node (scheduler, controller-manager) to talk to the API. no TLS. default is port 8080, change with –insecure-port flag.
• “Secure port”: use whenever possible. uses TLS.

How do I access Kubernetes API?

The easiest way to use the Kubernetes API from a Pod is to use one of the official client libraries….Accessing the API from within a Pod

1. For a Go client, use the official Go client library.
2. For a Python client, use the official Python client library.

What is node port?

A NodePort is an open port on every node of your cluster. Kubernetes transparently routes incoming traffic on the NodePort to your service, even if your application is running on a different node. However, a NodePort is assigned from a pool of cluster-configured NodePort ranges (typically ).

What is port and TargetPort in Kubernetes?

Port exposes the Kubernetes service on the specified port within the cluster. TargetPort is the port on which the service will send requests to, that your pod will be listening on. Your application in the container will need to be listening on this port also.

How do I access NodePort service from outside?

Exposing services as NodePort : Declaring a Service as NodePort exposes it on each Node’s IP at a static port (referred to as the NodePort ). You can then access the Service from outside the cluster by requesting :<NodePort> . This can also be used for production, albeit with some limitations.

What is Load Balancer Kubernetes?

A load balancer routes requests to clusters in order to optimize performance and ensure the reliability of your application. With a load balancer, the demands on your application are shared equally across clusters so that all available resources are utilized and no single cluster is overburdened.

Does ClusterIP load balancer?

The ClusterIP provides a load-balanced IP address. One or more pods that match a label selector can forward traffic to the IP address.

What is the difference between NodePort and ClusterIP?

NodePort: Exposes the service on each Node’s IP at a static port (the NodePort). A ClusterIP service, to which the NodePort service will route, is automatically created. NodePort and ClusterIP services, to which the external load balancer will route, are automatically created.