mirror of https://github.com/k3s-io/k3s
c444954d9c
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Kube-dns configmap translation to CoreDNS **What this PR does / why we need it**: Translation of kube-dns ConfigMap (StubDomains and UpstreamNameserver) to equivalent Proxy in CoreDNS. **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes kubernetes/kubeadm#662 **Special notes for your reviewer**: Currently, the translation is done as follows: Example ConfigMap of kube-dns. ``` apiVersion: v1 data: federations: | {"foo" : "foo.feddomain.com"} stubDomains: | {"abc.com" : ["1.2.3.4"], "my.cluster.local" : ["2.3.4.5"]} upstreamNameservers: | ["8.8.8.8", "8.8.4.4"] kind: ConfigMap metadata: creationTimestamp: 2018-01-22T20:21:56Z name: kube-dns namespace: kube-system ``` CoreDNS Corefile after translation. ``` .:53 { errors health kubernetes cluster.local in-addr.arpa ip6.arpa { upstream 8.8.8.8 8.8.4.4 pods insecure fallthrough in-addr.arpa ip6.arpa } federation cluster.local { foo foo.feddomain.com } prometheus :9153 proxy . 8.8.8.8 8.8.4.4 cache 30 } abc.com:53 { errors cache 30 proxy . 1.2.3.4 } my.cluster.local:53 { errors cache 30 proxy . 2.3.4.5 } ``` **Release note**: ```release-note Kubeadm: CoreDNS supports migration of the kube-dns configuration to CoreDNS configuration when upgrading the service discovery from kube-dns to CoreDNS as part of Beta. ``` |
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