Kubectl create -f manu.yaml -l color=blue error: no objects passed to create

Kubernetes-Slack Discussions
#1

manukumar:
kubectl create -f manu.yaml -l color=blue
error: no objects passed to create

#2

Ramkumar Nagaraj:
you cant pass labels in create argument

#3

Ramkumar Nagaraj:
can you paste manu.yaml here

#4

Ramkumar Nagaraj:
need to understand which resource you are trying to create

#5

manukumar:
i tried to deploy pod at a particular node using labels through the command line

#6

Ramkumar Nagaraj:
to deploy pod to particular node you need to use nodeSelector

#7

Ramkumar Nagaraj:
you can refer this - https://kubernetes.io/docs/tasks/configure-pod-container/assign-pods-nodes/

#8

manukumar:
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: blue
name: blue
spec:
replicas: 3
selector:
matchLabels:
app: blue
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: blue
spec:
containers:
- image: nginx
name: nginx
resources: {}
status: {}
~ this is my yaml file

#9

Ramkumar Nagaraj:
this has both combinations
• scheduling pods with node labels
• scheduling pod with designated node

#10

manukumar:
i try to deployed on node01

#11

Ramkumar Nagaraj:

apiVersion: apps/v1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    app: blue
  name: blue
spec:
  replicas: 3
  selector:
    matchLabels:
      app: blue
  strategy: {}
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: blue
    spec:
      nodeName: node01
      containers:
      - image: nginx
        name: nginx
        resources: {}
status: {}
#12

Ramkumar Nagaraj:
in pod-spec you have to specify nodeName as shown above

#13

manukumar:
ya this is through the YAML file but i know how can deploy through the command line?

#14

Ramkumar Nagaraj:
you dont have that option specifying nodeName imperatively while creating deployment

#15

Ramkumar Nagaraj:
kubectl create deploy --help -> this will say list of available options

#16

manukumar:
ho ok thank you

#17

Ramkumar Nagaraj:
imperative way you can create yaml file with dry-run flag, edit yaml and then create/apply using command line after adding the nodeName field

#18

Ramkumar Nagaraj:
• kubectl create deploy nginx --image=nginx --dry-run=client -o yaml > nginx.yaml
• edit nginx.yaml to include nodeName in pod.spec
• kubectl apply -f nginx.yaml

#19

Ramkumar Nagaraj:
this is the way you can create through imperative fashion

#20

manukumar:
ya thanks lot