I am trying to setup Jenkins Dynamic slaves creation using jenkins-kubernetes plugin.
My jenkins is running outside K8s Cluster.
Link: https://github.com/jenkinsci/kubernetes-plugin
My jenkins version is 2.60.2 and Kubernetes plugin version is 1.1.2
I followed the steps mention on the readme and successfully setup the connection.
And connection is successful.
Then I created a job with pod template :
Here starts the problem: 1. When I run this job initially it runs and jenkins slave container inside my pod not able to connect and throws:
I have enabled JNLP port(50000) not sure if it is the right port even tested with random option in Jenkins nothing worked.
2. Now I discarded this jenkins job and re run again it says:
Started by user Vaibhav Jain
[Pipeline] podTemplate
[Pipeline] {
[Pipeline] node
Still waiting to schedule task
Jenkins doesn’t have label defaultlabel
and no pod is getting started in kubernetes. This is weird.
I am not sure what I am doing wrong. Need help!
Instead of using certificates, I suggest you to use credentials in kubernetes, by creating a serviceAccount:
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: jenkins
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: jenkins
rules:
- apiGroups: [""]
resources: ["pods"]
verbs: ["create","delete","get","list","patch","update","watch"]
- apiGroups: [""]
resources: ["pods/exec"]
verbs: ["create","delete","get","list","patch","update","watch"]
- apiGroups: [""]
resources: ["pods/log"]
verbs: ["get","list","watch"]
- apiGroups: [""]
resources: ["secrets"]
verbs: ["get"]
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: RoleBinding
metadata:
name: jenkins
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: jenkins
subjects:
- kind: ServiceAccount
name: jenkins
and deploying jenkins using that serviceAccount:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
labels:
app: jenkins
name: jenkins
spec:
replicas: 1
selector:
matchLabels:
app: jenkins
template:
metadata:
labels:
app: jenkins
spec:
serviceAccountName: jenkins
....
I show you my screenshots for Kubernetes plugin (note Jenkins tunnel for the JNLP port, 'jenkins' is the name of my kubernetes service):
For credentials:
Then fill the fileds (ID will be autogenerated, description will be shown in credentials listbox), but be sure to have created serviceAccount in kubernetes as I said before:
My instructions are for the Jenkins master inside kubernetes. If you want it outside the cluster (but slaves inside) I think you have to use simple login/password credentials.
For what concerns your last error, it seems to be a host resolution error: the slave cannot resolve your host.
I hope it helps you.