kube-dns container fails with "Failed to create a kubernetes client: open /var/run/secrets/kubernetes.io/serviceaccount/token"
dylanjh...@gmail.com
I've managed to setup a 5 node cluster, 2 masters, 3 workers. using the "roll your own" instructions here:
https://kubernetes.io/docs/getting-started-guides/scratch/#preparing-certs
I can run pods np but dns is not functional. As per the documentation, One method is to setup a cluster DNS service:
https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dns/
All fine and dandy, while I realise its the job of the add-on manager to kick start the pod that project provides, I have been firing it up manually, in the interests of debugging
kubectl create -f kube-dns.yaml
Everything is created successfully, and eventually the deployment "spawns" a pod, and the pod the containers etc... however the kube-dns ALWAYS fails with this error:
"Failed to create a kubernetes client: open /var/run/secrets/kubernetes.io/serviceaccount/token"
I understand that this is kubernetes providing a token to the container, but whay I dont get is why it cannot be found.
Especially when it appears the required secrets are in existence:
bddcbpkbn1:~ # kubectl get serviceaccounts -n kube-system
NAME SECRETS AGE
default 2 13d
kube-dns 2 29m
bddcbpkbn1:~ # kubectl get secrets -n kube-system
NAME TYPE DATA AGE
default-token-6wnx5 kubernetes.io/service-account-token 2 44m
default-token-94kww kubernetes.io/service-account-token 2 46m
kube-dns-token-mnbg2 kubernetes.io/service-account-token 2 28m
kube-dns-token-wrs8h kubernetes.io/service-account-token 2 26m
bddcbpkbn1:~ #
Can anyone offer any suggestions as to why this is failing, or how I can go about diagnosing the issue?
Thanks in advance