My Daemonset pod is only created on the master node
I created a Daemonset from the ds.yaml file, but it created only 1 pod in the master node instead of 1 pod in each node. below is my ds.yaml file.
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: ds-one
spec:
selector:
matchLabels:
system: DaemonSetOne
template:
metadata:
labels:
system: DaemonSetOne
spec:
containers:
- name: nginx
image: nginx:1.15.1
ports:
- containerPort: 80
Comments
-
give label to your each node.
for example:kubectl label node master system=daemonsetOne
kubectl label node worker system=daemonsetOne
Then add nodeSelector in your yaml file.
apiVersion: apps/v1 kind: DaemonSet metadata: name: ds-one spec: selector: matchLabels: system: DaemonSetOne template: metadata: labels: system: DaemonSetOne spec: containers: - name: nginx image: nginx:1.15.1 ports: - containerPort: 80 nodeSelector: system: daemonsetOne
0 -
Hi @yemmey,
The DaemonSet operator is expected to schedule one Pod on each node, without the need of a nodeSelector. The use of the nodeSelector property helps when a DaemonSet is expected to schedule Pods on a subset of the cluster's nodes, which have been pre-labeled accordingly.
The Pods of a DaemonSet may not be scheduled on a node when the node is tainted, not ready, when it is unschedulable, or when dependencies cannot be met.
What is the output of the
kubectl get nodes -o wide
command?Regards,
-Chris0 -
0
-
Hi @yemmey,
This output seems ok.
What output is produced by:kubectl get nodes --show-labels
kubectl get pod -A
and
kubectl describe node | grep -i taint
Regards,
-Chris0 -
Apologies for the late response, here is the feedback below.
kubectl get nodes --show-labels:
kubectl get pod -A
kubectl describe node | grep -i taint
0 -
Hi @yemmey,
The output displaying taints is not as expected, according to the installation and configuration steps from lab exercise 3.3. A tainted control-plane node will prevent our pods from being scheduled on the control-plane node unless presenting a matching toleration. This is the reason why the DaemonSet operator only shows one running pod, instead of two.
Please revisit lab exercise 3.3 to remove the taint.Regards,
-Chris0 -
Got it! Thanks so much
0
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