lab 13.3 - charts on dashboard
Hello,
in guide for lab 13.3 (dashboard configuration) - on figure 13.3 there are beautiful charts for CPU and memory usage. On my dashboard I've everything except those charts. What I'm missing in configuration?
Regards,
Mariusz
Comments
-
Hi @mariuszr,
Assuming that your
metrics-server
is operational, from any of the following Dashboard view you should see the CPU Usage and Memory Usage charts:Overview
,Deployments
,Pods
, etc... These views can be selected from the left navigation panel.Regards,
-Chris0 -
Hi Chris,
Yes, metrics-server is working fine.
here how it looks in my case
Regards,
Mariusz0 -
Hi @mariuszr,
Did you happen to install the dashboard from a helm chart? Can you confirm that the dashaccess clusterrolebinding binds the correct serviceaccount with the correct clusterrole?
Also, is the metrics-server deployment configured with the additional
--kubelet-...
arguments as presented in step 5?Regards,
-Chris0 -
Hi Chris,
yes, dashboard installed from helm chart (with service modified to NodePort)
yes, roles are correct:
Name: dashaccess
Labels:
Annotations:
Role:
Kind: ClusterRole
Name: cluster-admin
Subjects:
Kind Name Namespace
---- ---- ---------
ServiceAccount dashboard-kubernetes-dashboard default___and, one more yes, metrics-server deployment had both --kubelet-... arguments - bellow piece of describe command
"Containers:
metrics-server:
Image: k8s.gcr.io/metrics-server/metrics-server:v0.3.7
Port: 4443/TCP
Host Port: 0/TCP
Args:
--cert-dir=/tmp
--secure-port=4443
--kubelet-insecure-tls
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname"Regards,
Mariusz0 -
Hi @mariuszr,
I have seen similar issues in the past with misconfigured Dashboard charts. In those situations the recommendation was to install the Dashboard following the documentation instead. As a result, steps 1 through 4 of the "Configure the Dashboard" lab should be replaced by:
The installation command from the documentation:
kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.2.0/aio/deploy/recommended.yaml
Edit the service and convert it into a
NodePort
type service:kubectl -n kubernetes-dashboard edit svc kubernetes-dashboard
List the service to view the value of the node port (3xxxx):
kubectl -n kubernetes-dashboard get svc kubernetes-dashboard
Give the Dashboard admin access (edit and update the existing clusterrolebinding, or replace it with a new one):
kubectl create clusterrolebinding dashaccess --clusterrole=cluster-admin --serviceaccount=kubernetes-dashboard:kubernetes-dashboard
Regards,
-Chris2 -
Hi @chrispokorni, I followed all the steps above; it looks like I did right, except for the secret results, and the service account dashboard-kubernetes-dashboard is not in the default namespace. I guess I'm missing something.
$ kubectl -n kubernetes-dashboard get svc kubernetes-dashboard NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes-dashboard NodePort 10.99.194.242 <none> 443:30951/TCP 5m47s student@cp:~$ kubectl create clusterrolebinding dashaccess --clusterrole=cluster-admin --serviceaccount=kubernetes-dahboard:kubernetes-dashboard clusterrolebinding.rbac.authorization.k8s.io/dashaccess created student@cp:~$ kubectl get serviceaccounts NAME SECRETS AGE default 0 64d myingress-ingress-nginx 0 42d student@cp:~$ kubectl -n kubernetes-dashboard get serviceaccounts NAME SECRETS AGE default 0 28m kubernetes-dashboard 0 28m
0 -
When I tried to open the Kubernetes dashboard, my browser crashed.
0 -
I created recommended.yaml file from the link and modified its type.
student@cp:~$ kubectl apply -f recommended.yaml namespace/kubernetes-dashboard created 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 Warning: spec.template.metadata.annotations[seccomp.security.alpha.kubernetes.io/pod]: deprecated since v1.19, non-fuctional in a future release; use the "seccompProfile" field instead deployment.apps/dashboard-metrics-scraper created
0 -
Hi @maybel,
The alternate installation method above was posted in 2021. Since then, the dashboard helm chart has been quite stable. From your comments above, it seems you may be mixing instructions from the lab guide with the ones from my older comment. For consistency I would recommend following the lab guide to install and configure the dashboard chart.
As far as the browser crashing, I cannot reproduce that, but I know in Chrome you may need to click the advanced button to allow the browser to display unsecured content.
Regards,
-Chris0 -
Thank you, @chrispokorni. I am working on that.
0 -
Hi @chrispokorni, I followed the lab guide. I got all the service accounts but zero secrets, and I wonder how I can fix it.
Get the Kubernetes Dashboard URL by running: export POD_NAME=$(kubectl get pods -n default -l "app.kubernetes.io/name=kubernetes-dashboard,app.kubernetes.io/instance=k8s-dashboard" -o jsonpath="{.items[0].metadata.name}") echo https://127.0.0.1:8443/ kubectl -n default port-forward $POD_NAME 8443:8443 student@cp:~$ kubectl get serviceaccounts NAME SECRETS AGE default 0 75d k8s-dashboard-kubernetes-dashboard 0 3m21s myingress-ingress-nginx 0 53d student@cp:~$
0 -
Another problem is the lab said:
On your local system, open a browser and navigate to an HTTPS URL made of the Public IP and the high-numbered port...
And I have one port, 443.
0 -
Hi @maybel,
I would not worry about the secrets counts being "0". It is expected in latest k8s releases. Feel free to proceed with the
clusterrolebinding
and thetoken
creation steps.If the
values.yaml
edit was successful in step 2, then there should be aNodePort
type service for the dashboard release, listing 2 distinct port values: an internal port 443 and an external high-valued node port (randomly assigned between 30000 and 32767).Regards,
-Chris0
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