There is no node role label of new joining node

[KeithTt]

kube version: 1.8.2
docker version: 17.10.0-ce

# kubectl get node --show-labels
NAME      STATUS    ROLES     AGE       VERSION   LABELS
uy08-07   Ready     master    7h        v1.8.2    beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=uy08-07,node-role.kubernetes.io/master=
uy08-08   Ready     <none>    1h        v1.8.2    beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=uy08-08

The node role is <none> defaultly?

And I add a label manully like this:

# kubectl label node uy08-08 node-role.kubernetes.io/node=
node "uy08-08" labeled

# kubectl get node --show-labels
NAME      STATUS    ROLES     AGE       VERSION   LABELS
uy08-07   Ready     master    7h        v1.8.2    beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=uy08-07,node-role.kubernetes.io/master=
uy08-08   Ready     node      1h        v1.8.2    beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/hostname=uy08-08,node-role.kubernetes.io/node=

Is this a bug?

[k8s-github-robot]

@KeithTt
There are no sig labels on this issue. Please add a sig label by:

1. mentioning a sig: @kubernetes/sig-<group-name>-<group-suffix>
   e.g., @kubernetes/sig-contributor-experience-<group-suffix> to notify the contributor experience sig, OR

2. specifying the label manually: /sig <label>
   e.g., /sig scalability to apply the sig/scalability label

Note: Method 1 will trigger an email to the group. See the group list and label list.
The <group-suffix> in the method 1 has to be replaced with one of these: bugs, feature-requests, pr-reviews, test-failures, proposals

[wackxu]

kubeadm join command do not explicitly label the role of node, If it is needed, I can help fix it.

[liggitt]

node roles are not yet defined in kubernetes. additionally, nodes should not start labeling themselves with roles (see kubernetes/community#911 for discussion of why labels should be applied to nodes, not self-applied by nodes)

if you would like to request a particular cluster setup tool like kubeadm add role labels to nodes, that feature request could be opened against that tool's repo (https://github.com/kubernetes/kubeadm/, https://github.com/kubernetes/kops/, etc)

[tsunamireversal-zz]

I have same issue, I'm trying to understand...
Are you saying that we should manually label nodes as "master" if we want them to behave as master nodes after joining? That they won't do that by themselves? Or does this apply to anything but master nodes?

[kolikons]

might be useful https://github.com/kolikons/label-watch