[BUG] [v0.6] epicli upgrade from Epiphany v0.5 fails on K8s part

[to-bar]

Describe the bug
It seems there are two issues:

1. Task [upgrade : upgrade-master | Upgrade K8s cluster to v1.16.7 (using kubeadm-config.yml file)] fails with error: [ERROR CoreDNSMigration]

kubeadm upgrade apply -y v1.16.7 --config /etc/kubeadm/kubeadm-config.yml --ignore-preflight-errors=CoreDNSUnsupportedPlugins", "delta": "0:00:00.055682", "end": "2020-10-07 13:04:12.416784", "msg": "non-zero return code", "rc": 2, "start": "2020-10-07 13:04:12.361102", "stderr": "\t[WARNING CoreDNSUnsupportedPlugins]: Get https://10.1.2.243:6443/api/v1/namespaces/kube-system/configmaps/coredns: dial tcp 10.1.2.243:6443: connect: connection refused\n[preflight] Some fatal errors occurred:\n\t[ERROR CoreDNSMigration]: Get https://10.1.2.243:6443/api/v1/namespaces/kube-system/configmaps/coredns: dial tcp 10.1.2.243:6443: connect: connection refused\n[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`\nTo see the stack trace of this error execute with --v=5 or higher", "stderr_lines": ["\t[WARNING CoreDNSUnsupportedPlugins]: Get https://10.1.2.243:6443/api/v1/namespaces/kube-system/configmaps/coredns: dial tcp 10.1.2.243:6443: connect: connection refused", "[preflight] Some fatal errors occurred:", "\t[ERROR CoreDNSMigration]: Get https://10.1.2.243:6443/api/v1/namespaces/kube-system/configmaps/coredns: dial tcp 10.1.2.243:6443: connect: connection refused", "[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`", "To see the stack trace of this error execute with --v=5 or higher"], "stdout": "[upgrade/config] Making sure the configuration is correct:\n[preflight] Running pre-flight checks.", "stdout_lines": ["[upgrade/config] Making sure the configuration is correct:", "[preflight] Running pre-flight checks."

This issue was fixed in version 0.7.1, see related PR #1431

2. TASK [kubernetes_master : Run secrets encryption] fails with error "The connection to the server 10.1.1.7:6443 was refused", after upgrading K8s cluster to v1.15.10.

This issue was fixed in version 0.7.1, see related PR #1427

OS (please complete the following information):

• RHEL7 and Ubuntu

Cloud Environment (please complete the following information):

• Azure and AWS

Additional context
Related issue: #1399 (resolved in 0.7.1).

[mkyc]

Closing without resolution as we no longer support 0.5 versions.