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Installation
Execute the following steps on master node
1) Create certificate
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ubuntu@k8s-s1-master:~$ mkdir certs ubuntu@k8s-s1-master:~$ cd certs/ ubuntu@k8s-s1-master:~/certs$ openssl genrsa -des3 -passout pass:x -out dashboard.pass.key 2048 Generating RSA private key, 2048 bit long modulus ......+++ ........................+++ e is 65537 (0x10001) ubuntu@k8s-s1-master:~/certs$ ll total 12 drwxrwxr-x 2 ubuntu ubuntu 4096 Feb 2 15:51 ./ drwxr-xr-x 8 ubuntu ubuntu 4096 Feb 2 15:48 ../ -rw-rw-r-- 1 ubuntu ubuntu 1751 Feb 2 15:51 dashboard.pass.key ubuntu@k8s-s1-master:~/certs$ openssl rsa -passin pass:x -in dashboard.pass.key -out dashboard.key writing RSA key ubuntu@k8s-s1-master:~/certs$ ubuntu@k8s-s1-master:~/certs$ ubuntu@k8s-s1-master:~/certs$ ll total 16 drwxrwxr-x 2 ubuntu ubuntu 4096 Feb 2 15:51 ./ drwxr-xr-x 8 ubuntu ubuntu 4096 Feb 2 15:48 ../ -rw-rw-r-- 1 ubuntu ubuntu 1679 Feb 2 15:51 dashboard.key -rw-rw-r-- 1 ubuntu ubuntu 1751 Feb 2 15:51 dashboard.pass.key ubuntu@k8s-s1-master:~/certs$ rm dashboard.pass.key ubuntu@k8s-s1-master:~/certs$ openssl req -new -key dashboard.key -out dashboard.csr You are about to be asked to enter information that will be incorporated into your certificate request. What you are about to enter is what is called a Distinguished Name or a DN. There are quite a few fields but you can leave some blank For some fields there will be a default value, If you enter '.', the field will be left blank. ----- Country Name (2 letter code) [AU]:CA State or Province Name (full name) [Some-State]:ONTARIO Locality Name (eg, city) []:OTTAWA Organization Name (eg, company) [Internet Widgits Pty Ltd]:AMDOCS Organizational Unit Name (eg, section) []:R&D Common Name (e.g. server FQDN or YOUR name) []:REZA Email Address []:myname@amdocs.com Please enter the following 'extra' attributes to be sent with your certificate request A challenge password []: An optional company name []: ubuntu@k8s-s1-master:~/certs$ ll total 16 drwxrwxr-x 2 ubuntu ubuntu 4096 Feb 2 15:53 ./ drwxr-xr-x 8 ubuntu ubuntu 4096 Feb 2 15:48 ../ -rw-rw-r-- 1 ubuntu ubuntu 1037 Feb 2 15:53 dashboard.csr -rw-rw-r-- 1 ubuntu ubuntu 1679 Feb 2 15:51 dashboard.key ubuntu@k8s-s1-master:~/certs$ openssl x509 -req -sha256 -days 365 -in dashboard.csr -signkey dashboard.key -out dashboard.crt Signature ok subject=/C=CA/ST=ONTARIO/L=OTTAWA/O=AMDOCS/OU=R&D/CN=REZA/emailAddress=myname@amdocs.com Getting Private key ubuntu@k8s-s1-master:~/certs$ ubuntu@k8s-s1-master:~/certs$ ll total 20 drwxrwxr-x 2 ubuntu ubuntu 4096 Feb 2 15:53 ./ drwxr-xr-x 8 ubuntu ubuntu 4096 Feb 2 15:48 ../ -rw-rw-r-- 1 ubuntu ubuntu 1273 Feb 2 15:53 dashboard.crt -rw-rw-r-- 1 ubuntu ubuntu 1037 Feb 2 15:53 dashboard.csr -rw-rw-r-- 1 ubuntu ubuntu 1679 Feb 2 15:51 dashboard.key ubuntu@k8s-s1-master:~/certs$ ubuntu@k8s-s5-master:~/certs$ kubectl create secret generic kubernetes-dashboard-certs --from-file=$HOME/certs -n kube-system secret "kubernetes-dashboard-certs" created ubuntu@k8s-s5-master:~/certs$ |
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ubuntu@k8s-s5-master:~/certs$ kubectl -n kube-system get service kubernetes-dashboard NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes-dashboard ClusterIP 10.108.52.94 <none> 80/TCP 57s ubuntu@k8s-s5-master:~/certs$ ubuntu@k8s-s1-master:~$ kubectl -n kube-system edit service kubernetes-dashboard #Change value for spec.type from "ClusterIP" to "NodePort" . Then save the file (:wq) |
4) Check port on which Dashboard was exposed
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ubuntu@k8s-s1-master:~$ kubectl -n kube-system get service kubernetes-dashboard NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes-dashboard NodePort 10.108.52.94 <none> 80:30830/TCP 2h ubuntu@k8s-s1-master:~$ #here it is 30830 |
Web-based Interface
5) Navigate to UI via a browser
Use the master node ip address and the exposed port :http://<master-node-ip-address>:<exposed-port>
6) Grant full admin privilages to Dashboard Service Account
The browser does not ask for credentials to login. The default user is "system:serviceaccount:kube-system:kubernetes-dashboard" , which does not have access to the default namespace.
To fix this, create a new "ClusterRoleBinding" and provide privilages to Dashboard Service Account.
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apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: kubernetes-dashboard
labels:
k8s-app: kubernetes-dashboard
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: kubernetes-dashboard
namespace: kube-system
~$ kubectl create -f dashboard-admin.yaml
clusterrolebinding "kubernetes-dashboard" created
~$ |
7) Navigate to UI via a browser
You can access the browser , without any credentials.
Monitoring SDN-C Site Health
The Kubernetes dashboard GUI can be used to monitor the health of components of the SDN-C site by changing the Namespace to the namespace SDN-C is created in.
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