VMware Certified Professional - Application Mordernization [VCP-AM] exam review

I passed the VCP-AM exam today! Yay! This exam consists of 55 multiple choice questions with a passing score of 300/500. Key tech relevant to the certification vSphere with Tanzu Tanzu Kubernetes Grid Tanzu Mission Control Kubernetes Experience and Prepration Started by going through the exam blueprint here vSphere with Tanzu I have installed and troubleshot vSphere with Tanzu; deployed and played with Tanzu Kubernetes Clusters along with enabling the harbor image registry, pushing container images and deploying pods from the harbor registry....

November 15, 2021 · 1 min · Jahnin Rajamoni

Configure conditional forwarding in coredns - Tanzu Kubernetes Clusters

So how do you conditionally forward dns requests from pods that are running in your Tanzu Kubernetes Clusters to specific DNS Servers? Begin by editing the coredns configMap kubectl -n kube-system edit configmap coredns root@debian:~# k -n kube-system edit configmap coredns configmap/coredns edited Add the following section to the coredns configmap. Replace domain-name and dns-server-ip with the domain name and dns server ip you want to conditionally forward to....

November 11, 2021 · 2 min · Jahnin Rajamoni

PodSecurityPolicy: unable to admit pod: in Tanzu Kubernetes Clusters

In vSphere with Tanzu, when you deploy Tanzu Kubernetes Clusters, the clusters are deployed with PodSecurityPolicy Admission Controller enabled. This would mean that you would need a pod security policy to deploy workloads to the guest clusters. Read the documentation here for more information. When you set permissions for a user on the supervisor cluster, a Cluster Role Binding will get created. You can review this by running the command kubectl get clusterrolebinding | grep vmware-system...

November 1, 2021 · 2 min · Jahnin Rajamoni

Antrea Agents in CrashLoopBackOff - CIDRNotAvailable

When using the Antrea CNI, it takes care of ip address management for each of the pods that are deployed onto the worker nodes. It achieves this with an OVS bridge named br-int on each of the nodes in the Tanzu kuberentes clusters. The OVS bridge also has a tunnel port that will create an overlay tunnel to other nodes in the Tanzu kubernetes clusters to enable inter-pod comms. Each worker node in the Tanzu kubernetes cluster is assigned its own unique /24 subnet....

October 29, 2021 · 4 min · Jahnin Rajamoni

Missing Tanzu Kubernetes Releases?

Tanzu Kubernetes Releases are Kubernetes distributions that are signed and supported by VMware for Tanzu Kubernetes Clusters. More info here There are two ways in which you can populate the Tanzu Kubernetes Releases(images) in your vSphere with Tanzu environment. These images are OVF templates that are backed by a Photon OS VM and about 16GB in size. More info here Use a subscribed content library. The subscribed content library will synchronize with a public VMware content library: https://wp-content....

October 19, 2021 · 3 min · Jahnin Rajamoni