I've got a Kubernetes installation on CoreOS with DNS addon running in a pod.
My problem is this: kube2sky cannot access the api-server. By default it uses 127.0.0.1:8080 which is not available to docker containers. Because the api-server is listening to localhost I switched the kube_master_url to the server version. This endpoint requires authentication.
This is the log from the kube2sky pod:
I1119 02:01:48.603839 1 kube2sky.go:389] Etcd server found: http://127.0.0.1:4001
I1119 02:01:49.604512 1 kube2sky.go:455] Using https://10.3.0.1:443 for kubernetes master
I1119 02:01:49.604524 1 kube2sky.go:456] Using kubernetes API v1
E1119 02:01:49.616085 1 reflector.go:136] Failed to list *api.Service: Get https://10.3.0.1:443/api/v1/services: x509: failed to load system roots and no roots provided
E1119 02:01:49.616142 1 reflector.go:136] Failed to list *api.Endpoints: Get https://10.3.0.1:443/api/v1/endpoints: x509: failed to load system roots and no roots provided
How do I get the authentication credentials into the pod so that kube2sky uses it?
This is the pod deklaration:
apiVersion: v1
kind: ReplicationController
metadata:
name: kube-dns-v9
namespace: kube-system
labels:
k8s-app: kube-dns
version: v9
kubernetes.io/cluster-service: "true"
spec:
replicas: 1
selector:
k8s-app: kube-dns
version: v9
template:
metadata:
labels:
k8s-app: kube-dns
version: v9
kubernetes.io/cluster-service: "true"
spec:
containers:
- name: etcd
image: gcr.io/google_containers/etcd:2.0.9
resources:
limits:
cpu: 100m
memory: 50Mi
command:
- /usr/local/bin/etcd
- -data-dir
- /var/etcd/data
- -listen-client-urls
- http://127.0.0.1:2379,http://127.0.0.1:4001
- -advertise-client-urls
- http://127.0.0.1:2379,http://127.0.0.1:4001
- -initial-cluster-token
- skydns-etcd
volumeMounts:
- name: etcd-storage
mountPath: /var/etcd/data
- name: kube2sky
image: gcr.io/google_containers/kube2sky:1.11
resources:
limits:
cpu: 100m
memory: 50Mi
args:
# command = "/kube2sky"
- -domain=cluster.local
- -kube_master_url=https://10.3.0.1:443
- name: skydns
image: gcr.io/google_containers/skydns:2015-10-13-8c72f8c
resources:
limits:
cpu: 100m
memory: 50Mi
args:
# command = "/skydns"
- -machines=http://127.0.0.1:4001
- -addr=0.0.0.0:53
- -ns-rotate=false
- -domain=cluster.local.
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
livenessProbe:
httpGet:
path: /healthz
port: 8080
scheme: HTTP
initialDelaySeconds: 30
timeoutSeconds: 5
readinessProbe:
httpGet:
path: /healthz
port: 8080
scheme: HTTP
initialDelaySeconds: 1
timeoutSeconds: 5
- name: healthz
image: gcr.io/google_containers/exechealthz:1.0
resources:
limits:
cpu: 10m
memory: 20Mi
args:
- -cmd=nslookup kubernetes.default.svc.cluster.local 127.0.0.1 >/dev/null
- -port=8080
ports:
- containerPort: 8080
protocol: TCP
volumes:
- name: etcd-storage
emptyDir: {}
dnsPolicy: Default # Don't use cluster DNS.
