Can't join node to cluster (Kubernetes)

12/5/2016

When I run kubeadm join everything seems to be fine in output, but pod for this node has CrashLoopBackOff status because of the following error in logs:

Traceback (most recent call last):
  File "<string>", line 336, in <module>
  File "<string>", line 287, in main
  File "<string>", line 210, in warn_if_hostname_conflict
  File "site-packages/pycalico/datastore.py", line 137, in wrapped
pycalico.datastore_errors.DataStoreError: get_host_bgp_ips: Error accessing etcd (Connection to etcd failed due to MaxRetryError("HTTPConnectionPool(host='127.0.0.1', port=2379): Max retries exceeded with url: /v2/keys/calico/bgp/v1/host/bpmw05/ip_addr_v4 (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f1872c364d0>: Failed to establish a new connection: [Errno 111] Connection refused',))",)).  Is etcd running?
startup returned -1
Waiting for etcd connection...
No IP provided. Using detected IP: 192.168.56.105
Calico node failed to start

NAMESPACE     NAME                                    READY     STATUS             RESTARTS   AGE
default       my-nginx-379829228-0pf4b                1/1       Running            0          1h
kube-system   calico-node-7wodf                       2/2       Running            0          2h
kube-system   calico-node-s7dyu                       1/2       CrashLoopBackOff   6          6m
kube-system   calico-policy-controller-modx4          1/1       Running            0          2h
kube-system   dummy-2088944543-jl2fu                  1/1       Running            0          2h
kube-system   etcd-host                               1/1       Running            0          2h
kube-system   kube-apiserver-host                     1/1       Running            0          2h
kube-system   kube-controller-manager-host            1/1       Running            0          2h
kube-system   kube-discovery-1150918428-asto0         1/1       Running            0          2h
kube-system   kube-dns-654381707-rvt9o                3/3       Running            0          2h
kube-system   kube-proxy-f7v9u                        1/1       Running            0          6m
kube-system   kube-proxy-x58jy                        1/1       Running            0          2h
kube-system   kube-scheduler-host                     1/1       Running            0          2h
kube-system   kubernetes-dashboard-3095304083-9moev   1/1       Running            0          53m

May be some additional setup for etcd is required? (I am using this tutorial as a reference and running on CentOS 7.2 VMs managed by VMware ESXi.)

I can confirm that etcd is running on master by folowing command:

http://127.0.0.1:2379/version
{"etcdserver":"2.2.5","etcdcluster":"2.2.0"}

But as far as I understand other nodes also should have access to it? Or not? If I try to curl from node on which join command was run I get Connection refused (I use IP of master node instead of localhost). Like so:

curl -s http://[master_ip]:2379/version
[no output]
-- PavelP
etcd
kubernetes

0 Answers