From 0cc17267811efa7b9568cdd264d57fd1640e23a8 Mon Sep 17 00:00:00 2001
From: David Louks <2402775+dlouks@users.noreply.github.com>
Date: Tue, 9 Feb 2021 08:02:40 -0600
Subject: [PATCH] Remove deletion of coredns deployment. (#7211)
* Add unique annotation on coredns deployment and only remove existing deployment if annotation is missing.
* Ignore errors when gathering coredns deployment details to handle case where it doesn't exist yet
* Remove run_once, deletegate_to and add to when statement
---
roles/kubernetes-apps/ansible/tasks/cleanup_dns.yml | 10 ++++++++++
.../ansible/templates/coredns-deployment.yml.j2 | 1 +
2 files changed, 11 insertions(+)
diff --git a/roles/kubernetes-apps/ansible/tasks/cleanup_dns.yml b/roles/kubernetes-apps/ansible/tasks/cleanup_dns.yml
index 49ed96a47..8d3020875 100644
--- a/roles/kubernetes-apps/ansible/tasks/cleanup_dns.yml
+++ b/roles/kubernetes-apps/ansible/tasks/cleanup_dns.yml
@@ -1,4 +1,13 @@
---
+- name: Kubernetes Apps | Register coredns deployment annotation `createdby`
+ shell: "{{ bin_dir }}/kubectl get deploy -n kube-system coredns -o jsonpath='{ .spec.template.metadata.annotations.createdby }'"
+ register: createdby_annotation
+ changed_when: false
+ ignore_errors: true
+ when:
+ - dns_mode in ['coredns', 'coredns_dual']
+ - inventory_hostname == groups['kube-master'][0]
+
- name: Kubernetes Apps | Delete kubeadm CoreDNS
kube:
name: "coredns"
@@ -9,6 +18,7 @@
when:
- dns_mode in ['coredns', 'coredns_dual']
- inventory_hostname == groups['kube-master'][0]
+ - createdby_annotation.stdout != 'kubespray'
- name: Kubernetes Apps | Delete kubeadm Kube-DNS service
kube:
diff --git a/roles/kubernetes-apps/ansible/templates/coredns-deployment.yml.j2 b/roles/kubernetes-apps/ansible/templates/coredns-deployment.yml.j2
index d14dde08b..cb9625649 100644
--- a/roles/kubernetes-apps/ansible/templates/coredns-deployment.yml.j2
+++ b/roles/kubernetes-apps/ansible/templates/coredns-deployment.yml.j2
@@ -23,6 +23,7 @@ spec:
k8s-app: kube-dns{{ coredns_ordinal_suffix }}
annotations:
seccomp.security.alpha.kubernetes.io/pod: 'runtime/default'
+ createdby: 'kubespray'
spec:
priorityClassName: system-cluster-critical
nodeSelector:
--
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