unable to use specified CA cert /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
gitlab 9.6.3 fresh install with a recovered sql backup
after checking the logs if found this in /var/log/gitlab/prometheus/current
2017-07-19_11:24:06.15894 time="2017-07-19T13:24:06+02:00" level=error msg="Error creating HTTP client for job "kubernetes-nodes": unable to use specified CA cert /var/run/secrets/kubernetes.io/serviceaccount/ca.crt: open /var/run/secrets/kubernetes.io/serviceaccount/ca.crt: no such file or directory" source="scrape.go:121" 2017-07-19_11:24:06.15895 time="2017-07-19T13:24:06+02:00" level=error msg="Cannot create Kubernetes discovery: open /var/run/secrets/kubernetes.io/serviceaccount/token: no such file or directory" source="discovery.go:85"
related to: https://github.com/openshift/origin/issues/13865