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MicroK8s : Enable Dashboard2020/08/12

To enable Dashboard on MicroK8s Cluster, Configure like follows.
[1] Enable Dashboard add-on on primary Node.
[root@dlp ~]#
microk8s enable dashboard dns

Enabling Kubernetes Dashboard
Addon metrics-server is already enabled.
Applying manifest
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created

If RBAC is not enabled access the dashboard using the default token retrieved with:

token=$(microk8s kubectl -n kube-system get secret | grep default-token | cut -d " " -f1)
microk8s kubectl -n kube-system describe secret $token

In an RBAC enabled setup (microk8s enable RBAC) you need to create a user with restricted
permissions as shown in:

Enabling DNS
Applying manifest
serviceaccount/coredns created
configmap/coredns created
deployment.apps/coredns created
service/kube-dns created
clusterrole.rbac.authorization.k8s.io/coredns created
clusterrolebinding.rbac.authorization.k8s.io/coredns created
Restarting kubelet
Adding argument --cluster-domain to nodes.
Applying to node node01.srv.world.
Node node01.srv.world not present
Adding argument --cluster-dns to nodes.
Applying to node node01.srv.world.
Node node01.srv.world not present
Restarting nodes.
Applying to node node01.srv.world.
Node node01.srv.world not present
DNS is enabled

[root@dlp ~]#
microk8s kubectl get services -n kube-system

NAME                        TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                  AGE
dashboard-metrics-scraper   ClusterIP   <none>        8000/TCP                 46s
kube-dns                    ClusterIP    <none>        53/UDP,53/TCP,9153/TCP   45s
kubernetes-dashboard        ClusterIP    <none>        443/TCP                  46s
metrics-server              ClusterIP   <none>        443/TCP                  15h

[root@dlp ~]#
microk8s kubectl -n kube-system get pods -o wide

NAME                                        READY   STATUS    RESTARTS   AGE   IP           NODE            NOMINATED NODE   READINESS GATES
coredns-588fd544bf-4d4kc                    1/1     Running   0          24s   dlp.srv.world   <none>           <none>
dashboard-metrics-scraper-59f5574d4-lmgmt   1/1     Running   0          25s   dlp.srv.world   <none>           <none>
kubernetes-dashboard-6d97855997-bwg2g       1/1     Running   0          25s   dlp.srv.world   <none>           <none>
metrics-server-c65c9d66-kdxh8               1/1     Running   2          16h   dlp.srv.world   <none>           <none>

# confirm security token

# it is the second column value on [token:] line

[root@dlp ~]#
microk8s kubectl -n kube-system describe secret $(microk8s kubectl -n kube-system get secret | grep default-token | awk '{print $1}')

Name:         default-token-l5fsn
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: default
              kubernetes.io/service-account.uid: 63e24aa4-dabf-4ccf-848e-8993470d03c4

Type:  kubernetes.io/service-account-token

ca.crt:     1103 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IlR2azl4Xy1WSFo1VEVtNDZaMFB0TzFaZGtJa0xqR.....

# set port-forwarding to enable external access

[root@dlp ~]#
microk8s kubectl port-forward -n kube-system service/kubernetes-dashboard --address 10443:443

Forwarding from -> 8443
# if Firewalld is running, allow ports

[root@dlp ~]#
firewall-cmd --add-port=10443/tcp --permanent

[root@dlp ~]#
firewall-cmd --reload

[2] Access to [https://(MicroK8s primary node's Hostname or IP address):10443/] with an web browser on any Client computer in local network. Copy and paste the security token you confirmed on [1] to [Enter token] section and Click [Sing In] button.
[3] After authentication successfully passed, MicroK8s Cluster Dashboard is displayed.
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