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Editor to share with you what are the reasons for the failure of installing kubenertes 1.16, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Installation uses CentOS7.5 installed under virtual box, and Ansible one-click installation script under Easypack is used to install kubernetes1.16, dashbaord and coredns. Two problems are encountered in the process, which are sorted out as follows.

Version changes:

Only the Kubernetes version has been changed the current version Kubernetes 1.15.0 1.16.0 Docker 18.09.7 18.09.7 ETCD 3.3.13 3.3.13 FLANNEL 0.10.0 0.11.0

Problem 1:coredns installation failed

Reason: the apiVersion of Deployment in coredns.yml is discarded as extensions/v1beta1,extensions/v1beta1, which results in an execution error

An example of a core.yml file is as follows

[root@host132 ansible] # cat / etc/k8s/coredns/coredns.yaml# _ _ MACHINE_GENERATED_WARNING__... Omit-apiVersion: extensions/v1beta1kind: Deploymentmetadata: name: coredns namespace: kube-system labels: k8s-app: kube-dns kubernetes.io/cluster-service: "true" addonmanager.kubernetes.io/mode: Reconcile kubernetes.io/name: "CoreDNS". Omit [root@host132 ansible] #

Corresponding method: modify it to apps/v1.

[root@host132 templates] # git diff coredns.yamldiff-- git a/k8s/ansible/coredns/templates/coredns.yaml b/k8s/ansible/coredns/templates/coredns.yamlindex 96abe75..69af15a 100644FUFUR-- loadbalance k8s apiVersion: extensions/v1beta1+apiVersion: apps/v1kind: Deploymentmetadata: name: coredns [root@host132 templates] # question 2: kubectl get cs shows as unknown

Examples of error messages are as follows:

[root@host132 ansible] # kubectl get csNAME AGEscheduler controller-manager etcd-0 [root@host132 ansible] #

There does not seem to be much impact, there is no corresponding for the time being, and the subsequent reasons will continue to be updated after confirmation.

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