JENKINS on KUBERNETES cluster with TALOS OS.

Installation test on linux (POP OS 20.10 — Ubuntu Distro Fork)

This is a tutorial to install a Jenkins instance on a Kubernetes cluster based on TALOS OS , (here the Documentation for all platforms)

Steps TO -DO :

  1. Installation of Kubectl (v. GitVersion:”v1.19.3")
  2. Installation e configuration of TALOS OS (talosclt ver. 0.70 beta)
  3. Creation of K8S Cluster
  4. Installation of JENKINS on the cluster
  5. Deploy of JENKINS Container and configuring the POD
  6. Distribution of Jenkins service
  7. Clean UP and Conclusion

1. Docker installation :

sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io

docker --version

Docker version 19.03.13, build 4484c46

2. Kubectl Installation — (SNAP or REPO mode).

sudo snap install kubectl --classic

[sudo] password di user:
Setup snap "snapd" (9721) security profiles 2020-11-12T14:15:32+01:00 INFO Waiting for automatic snapd restart...
kubectl 1.19.3 from Canonical✓ installed

kubectl version --client
Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.3", GitCommit:"1e11e4a2108024935ecfcb2912226cedeafd99df", GitTreeState:"clean", BuildDate:"2020-10-20T14:12:21Z", GoVersion:"go1.15.3", Compiler:"gc", Platform:"linux/amd64"}

---> If SNAP is not present :

❯sudo apt-get update && sudo apt-get install -y apt-transport-https gnupg2 curl
❯curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
❯echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee -a /etc/apt/sources.list.d/kubernetes.list
❯sudo apt-get update
❯sudo apt-get install -y kubectl

3. Talosctl installation :

curl -Lo /usr/local/bin/talosctl https://github.com/talos-systems/talos/releases/latest/download/talosctl-$\(uname -s | tr "[:upper:]" "[:lower:]")-amd64

zsh: parse error near `)'

N.B : If error appear, follow the link : https://github.com/talos-systems/talos/releases

and insert your system right version (amd64 in my case):
https://github.com/talos-systems/talos/releases/download/v0.7.0-beta.1/talosctl-linux-amd64

❯ curl -Lo /usr/local/bin/talosctl https://github.com/talos-systems/talos/releases/download/v0.7.0-beta.1/talosctl-linux-amd64

❯ sudo chmod +x /usr/local/bin/talosctl

4. Creation of K8s Cluster :

talosctl cluster create --wait

validating CIDR and reserving IPs
generating PKI and tokens
creating network talos-default
creating master nodes
creating worker nodes
waiting for API
bootstrapping cluster
waiting for etcd to be healthy: OK
waiting for bootkube to finish: OK
waiting for apid to be ready: OK
waiting for kubelet to be healthy: OK
waiting for all k8s nodes to report: OK
waiting for all k8s nodes to report ready: OK
waiting for all control plane components to be ready: OK
waiting for kube-proxy to report ready: OK
waiting for coredns to report ready: OK
waiting for all k8s nodes to report schedulable: OK

merging kubeconfig into "/home/pippo/.kube/config"
renamed cluster "talos-default" -> "talos-default-1"
renamed auth info "admin@talos-default" -> "admin@talos-default-1"
renamed context "admin@talos-default" -> "admin@talos-default-1"
PROVISIONER docker
NAME talos-default
NETWORK NAME talos-default
NETWORK CIDR 10.5.0.0/24
NETWORK GATEWAY 10.5.0.1
NETWORK MTU 1500

NODES:

NAME TYPE IP CPU RAM DISK
/talos-default-master-1 controlplane 10.5.0.2 2.00 2.1 GB -
/talos-default-worker-1 join 10.5.0.3 2.00 2.1 GB -
talosctl config nodes 10.5.0.2


kubectl --kubeconfig kubeconfig config set-cluster talos-default --server https://127.0.0.1:6443

****Cluster "talos-default" set.Cluster "talos-default" set.

❯ talosctl containers
NODE NAMESPACE ID IMAGE PID STATUS
10.5.0.2 system apid talos/apid 196 RUNNING
10.5.0.2 system etcd gcr.io/etcd-development/etcd:v3.4.12 274 RUNNING
10.5.0.2 system networkd talos/networkd 88 RUNNING
10.5.0.2 system routerd talos/routerd 89 RUNNING
10.5.0.2 system trustd talos/trustd 207 RUNNING

❯ kubectl get node
NAME STATUS ROLES AGE VERSION
talos-default-master-1 Ready master 39m v1.19.3
talos-default-worker-1 Ready <none> 39m v1.19.3
*** The whole operation will be complete in 'xx:yy' Min, depends your configuration and your bandwidth.

Various TALOS Commands examples :

talosctl containers -k

NODE NAMESPACE ID IMAGE PID STATUS
10.5.0.2 k8s.io kube-system/coredns-54fb6ddb8b-pbwcl k8s.gcr.io/pause@sha256:927d98197ec1141a368550822d18fa1c60bdae27b78b0c004f705f548c07814f 1761 RUNNING
10.5.0.2 k8s.io └─ kube-system/coredns-54fb6ddb8b-pbwcl:coredns k8s.gcr.io/coredns@sha256:73ca82b4ce829766d4f1f10947c3a338888f876fbed0540dc849c89ff256e90c 1916 RUNNING
10.5.0.2 k8s.io kube-system/kube-apiserver-jnm4b k8s.gcr.io/pause@sha256:927d98197ec1141a368550822d18fa1c60bdae27b78b0c004f705f548c07814f 1039 RUNNING
10.5.0.2 k8s.io └─ kube-system/kube-apiserver-jnm4b:kube-apiserver k8s.gcr.io/kube-apiserver-amd64@sha256:f7a125197ee7f68c21b319bd4422d2492c5efb02f76f46ed8918cf7e12566570 2360 RUNNING
10.5.0.2 k8s.io kube-system/kube-controller-manager-sf6dv k8s.gcr.io/pause@sha256:927d98197ec1141a368550822d18fa1c60bdae27b78b0c004f705f548c07814f 1835 RUNNING
10.5.0.2 k8s.io └─ kube-system/kube-controller-manager-sf6dv:kube-controller-manager k8s.gcr.io/kube-controller-manager-amd64@sha256:29dfffa60c8c6858800732b65d775e03ebd3e5dab30fa0439d6f77e668b699c3 1868 RUNNING
10.5.0.2 k8s.io kube-system/kube-flannel-z5m7h k8s.gcr.io/pause@sha256:927d98197ec1141a368550822d18fa1c60bdae27b78b0c004f705f548c07814f 815 RUNNING
10.5.0.2 k8s.io └─ kube-system/kube-flannel-z5m7h:kube-flannel quay.io/coreos/flannel@sha256:6d451d92c921f14bfb38196aacb6e506d4593c5b3c9d40a8b8a2506010dc3e10 1647 RUNNING
10.5.0.2 k8s.io kube-system/kube-proxy-gb2st k8s.gcr.io/pause@sha256:927d98197ec1141a368550822d18fa1c60bdae27b78b0c004f705f548c07814f 808 RUNNING
10.5.0.2 k8s.io └─ kube-system/kube-proxy-gb2st:kube-proxy k8s.gcr.io/kube-proxy-amd64@sha256:37fbe956db3b1a9411bad993c46f9f9f11caa10fcdc5128a483fb1007868d310 853 RUNNING
10.5.0.2 k8s.io kube-system/kube-scheduler-kt4j8 k8s.gcr.io/pause@sha256:927d98197ec1141a368550822d18fa1c60bdae27b78b0c004f705f548c07814f 2044 RUNNING
10.5.0.2 k8s.io └─ kube-system/kube-scheduler-kt4j8:kube-scheduler k8s.gcr.io/kube-scheduler-amd64@sha256:5ad4bcdf513354c43e4d97d590d0dca64036bb134da9b45076d5c7563652e5e4 2075 RUNNING
10.5.0.2 k8s.io kube-system/pod-checkpointer-8nghk k8s.gcr.io/pause@sha256:927d98197ec1141a368550822d18fa1c60bdae27b78b0c004f705f548c07814f 1038 RUNNING
10.5.0.2 k8s.io kube-system/pod-checkpointer-8nghk-talos-default-master-1 k8s.gcr.io/pause@sha256:927d98197ec1141a368550822d18fa1c60bdae27b78b0c004f705f548c07814f 1266 RUNNING
10.5.0.2 k8s.io └─ kube-system/pod-checkpointer-8nghk-talos-default-master-1:pod-checkpointer ghcr.io/talos-systems/pod-checkpointer@sha256:2ad904c8c09964004b392ed467af929375b04677037a97f59da2cf9039980dbc 1300 RUNNING
10.5.0.2 k8s.io └─ kube-system/pod-checkpointer-8nghk:pod-checkpointer ghcr.io/talos-systems/pod-checkpointer@sha256:2ad904c8c09964004b392ed467af929375b04677037a97f59da2cf9039980dbc 1206 RUNNING
10.5.0.2 k8s.io kubelet docker.io/autonomy/kubelet:v1.19.3 333 RUNNING

talosctl services

NODE SERVICE STATE HEALTH LAST CHANGE LAST EVENT
10.5.0.2 apid Running OK 15m47s ago Health check successful
10.5.0.2 bootkube Finished ? 12m27s ago Service finished successfully
10.5.0.2 containerd Running OK 15m55s ago Health check successful
10.5.0.2 cri Running OK 15m53s ago Health check successful
10.5.0.2 etcd Running OK 15m4s ago Health check successful
10.5.0.2 kubelet Running OK 14m55s ago Health check successful
10.5.0.2 machined Running ? 15m56s ago Service started as goroutine
10.5.0.2 networkd Running OK 15m54s ago Health check successful
10.5.0.2 routerd Running OK 15m54s ago Health check successful
10.5.0.2 trustd Running OK 15m52s ago Health check successful

talosctl cluster show

PROVISIONER docker
NAME talos-default
NETWORK NAME talos-default
NETWORK CIDR 10.5.0.0/24
NETWORK GATEWAY <nil>
NETWORK MTU 1500

NODES:

NAME TYPE IP CPU RAM DISK
/talos-default-master-1 controlplane 10.5.0.2 - - -
/talos-default-worker-1 join 10.5.0.3 - - -

talosctl images

quay.io/coreos/flannel:v0.12.0-amd64
ghcr.io/talos-systems/install-cni:v0.1.0-2-g709d580
k8s.gcr.io/coredns:1.7.0
gcr.io/etcd-development/etcd:v3.4.12
k8s.gcr.io/kube-apiserver-amd64:v1.19.3
k8s.gcr.io/kube-controller-manager-amd64:v1.19.3
k8s.gcr.io/kube-scheduler-amd64:v1.19.3
k8s.gcr.io/kube-proxy-amd64:v1.19.3
docker.io/autonomy/kubelet:v1.19.3
ghcr.io/talos-systems/pod-checkpointer:v0.1.0-2-g709d580
ghcr.io/talos-systems/installer:v0.7.0-beta.1

talosctl stats

NODE NAMESPACE ID MEMORY(MB) CPU
10.5.0.2 system apid 8.54 1221864034
10.5.0.2 system etcd 35.93 72592144012
10.5.0.2 system networkd 8.37 1748824935
10.5.0.2 system routerd 5.82 270313687
10.5.0.2 system trustd 6.30 362671770

Here the complete help commands list :

talosctl --help

Usage:
talosctl [command]

Available Commands:
apply-config Apply a new configuration to a node
bootstrap Bootstrap the cluster
cluster A collection of commands for managing local docker-based or firecracker-based clusters
completion Output shell completion code for the specified shell (bash or zsh)
config Manage the client configuration
containers List containers
copy Copy data out from the node
crashdump Dump debug information about the cluster
dashboard Cluster dashboard with real-time metrics
dmesg Retrieve kernel logs
events Stream runtime events
gen Generate CAs, certificates, and private keys
health Check cluster health
help Help about any command
images List the default images used by Talos
interfaces List network interfaces
kubeconfig Download the admin kubeconfig from the node
list Retrieve a directory listing
logs Retrieve logs for a service
memory Show memory usage
mounts List mounts
processes List running processes
read Read a file on the machine
reboot Reboot a node
recover Recover a control plane
reset Reset a node
restart Restart a process
rollback Rollback a node to the previous installation
routes List network routes
service Retrieve the state of a service (or all services), control service state
shutdown Shutdown a node
stats Get container stats
time Gets current server time
upgrade Upgrade Talos on the target node
upgrade-k8s Upgrade Kubernetes control plane in the Talos cluster.
usage Retrieve a disk usage
validate Validate config
version Prints the version

Flags:
--context string Context to be used in command
-e, --endpoints strings override default endpoints in Talos configuration
-h, --help help for talosctl
-n, --nodes strings target the specified nodes
--talosconfig string The path to the Talos configuration file (default "/home/pippo/.talos/config")

5. Jenkins installation on cluster k8s :

kubectl get node
NAME STATUS ROLES AGE VERSION
talos-default-master-1 Ready master 39m v1.19.3
talos-default-worker-1 Ready <none> 39m v1.19.3

kubectl create namespace jenkins
namespace/jenkins created

kubectl get namespaces
NAME STATUS AGE
default Active 53m
**jenkins Active 76s**
kube-node-lease Active 53m
kube-public Active 53m
kube-system Active 53m

6. Deploy of JENKINS Conteiner and configuring the POD :

jenkins/jenkins:lts. will be exposed in ports 8080 and 50000.

apiVersion: apps/v1
kind: Deployment
metadata:
name: jenkins-deployment
spec:
replicas: 1
selector:
matchLabels:
app: jenkins
template:
metadata:
labels:
app: jenkins
spec:
containers:
- name: jenkins
image: jenkins/jenkins:lts
ports:
- name: http-port
containerPort: 8080
- name: jnlp-port
containerPort: 50000
volumeMounts:

- name: jenkins-vol
mountPath: /var/jenkins_vol
volumes:
- name: jenkins-vol
emptyDir: {}

Deploy the containe using the above file. (use your local path)

kubectl create -f jenkins-deployment.yaml --namespace jenkins
deployment.apps/jenkins-deployment created

kubectl get pod -n jenkins
NAME READY STATUS RESTARTS AGE
jenkins-deployment-794699f9bc-d4wk7 0/1 ContainerCreating 0 40s

kubectl get pod -n jenkins
NAME READY STATUS RESTARTS AGE
jenkins-deployment-794699f9bc-d4wk7 1/1 Running 0 2m7s

7. Distribution of Jenkins service :

Create a new file : jenkins-svc.yaml

apiVersion: v1
kind: Service
metadata:
name: jenkins
spec:
type: NodePort
ports:
- port: 8080
targetPort: 8080
nodePort: 30000
selector:
app: jenkins

---
apiVersion: v1
kind: Service
metadata:
name: jenkins-jnlp
spec:
type: ClusterIP
ports:
- port: 50000
targetPort: 50000
selector:
app: jenkins
kubectl create -f jenkins-svc.yaml --namespace jenkins
service/jenkins created
service/jenkins-jnlp created

kubectl get svc --namespace jenkins
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
jenkins NodePort 10.103.26.190 <none> 8080:30000/TCP 15s
jenkins-jnlp ClusterIP 10.108.159.115 <none> 50000/TCP 15s

kubectl get node -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
talos-default-master-1 Ready master 82m v1.19.3 10.5.0.2 <none> Talos (v0.7.0-beta.1) 5.8.0-7630-generic containerd://1.4.1
talos-default-worker-1 Ready <none> 82m v1.19.3 10.5.0.3 <none> Talos (v0.7.0-beta.1) 5.8.0-7630-generic containerd://1.4.1

Now, point your browser to JENKINS web interface :

http://10.5.0.2:30000

To find out the admin first password, look in the log :

kubectl get pods --namespace jenkins

NAME READY STATUS RESTARTS AGE
jenkins-deployment-794699f9bc-d4wk7 1/1 Running 0 26m

kubectl logs jenkins-deployment-794699f9bc-d4wk7 --namespace jenkins

Running from: /usr/share/jenkins/jenkins.war
webroot: EnvVars.masterEnvVars.get("JENKINS_HOME")
2020-11-13 10:59:42.195+0000 [id=1] INFO org.eclipse.jetty.util.log.Log#initialized: Logging initialized @292ms to org.eclipse.jetty.util.log.JavaUtilLog
2020-11-13 10:59:42.293+0000 [id=1] INFO winstone.Logger#logInternal: Beginning extraction from war file
2020-11-13 10:59:43.375+0000 [id=1] WARNING o.e.j.s.handler.ContextHandler#setContextPath: Empty contextPath
2020-11-13 10:59:43.423+0000 [id=1] INFO org.eclipse.jetty.server.Server#doStart: jetty-9.4.30.v20200611; built: 2020-06-11T12:34:51.929Z; git: 271836e4c1f4612f12b7bb13ef5a92a927634b0d; jvm 1.8.0_242-b08
2020-11-13 10:59:43.606+0000 [id=1] INFO o.e.j.w.StandardDescriptorProcessor#visitServlet: NO JSP Support for /, did not find org.eclipse.jetty.jsp.JettyJspServlet
2020-11-13 10:59:43.653+0000 [id=1] INFO o.e.j.s.s.DefaultSessionIdManager#doStart: DefaultSessionIdManager workerName=node0
2020-11-13 10:59:43.653+0000 [id=1] INFO o.e.j.s.s.DefaultSessionIdManager#doStart: No SessionScavenger set, using defaults
2020-11-13 10:59:43.656+0000 [id=1] INFO o.e.j.server.session.HouseKeeper#startScavenging: node0 Scavenging every 660000ms
2020-11-13 10:59:43.925+0000 [id=1] INFO hudson.WebAppMain#contextInitialized: Jenkins home directory: /var/jenkins_home found at: EnvVars.masterEnvVars.get("JENKINS_HOME")
2020-11-13 10:59:43.995+0000 [id=1] INFO o.e.j.s.handler.ContextHandler#doStart: Started w.@733c423e{Jenkins v2.249.3,/,file:///var/jenkins_home/war/,AVAILABLE}{/var/jenkins_home/war}
2020-11-13 10:59:44.023+0000 [id=1] INFO o.e.j.server.AbstractConnector#doStart: Started ServerConnector@387a8303{HTTP/1.1, (http/1.1)}{0.0.0.0:8080}
2020-11-13 10:59:44.024+0000 [id=1] INFO org.eclipse.jetty.server.Server#doStart: Started @2120ms
2020-11-13 10:59:44.024+0000 [id=20] INFO winstone.Logger#logInternal: Winstone Servlet Engine running: controlPort=disabled
2020-11-13 10:59:45.009+0000 [id=26] INFO jenkins.InitReactorRunner$1#onAttained: Started initialization
2020-11-13 10:59:45.022+0000 [id=25] INFO jenkins.InitReactorRunner$1#onAttained: Listed all plugins
2020-11-13 10:59:46.126+0000 [id=25] INFO jenkins.InitReactorRunner$1#onAttained: Prepared all plugins
2020-11-13 10:59:46.129+0000 [id=25] INFO jenkins.InitReactorRunner$1#onAttained: Started all plugins
2020-11-13 10:59:46.139+0000 [id=26] INFO jenkins.InitReactorRunner$1#onAttained: Augmented all extensions
2020-11-13 10:59:47.022+0000 [id=25] INFO jenkins.InitReactorRunner$1#onAttained: System config loaded
2020-11-13 10:59:47.022+0000 [id=25] INFO jenkins.InitReactorRunner$1#onAttained: System config adapted
2020-11-13 10:59:47.023+0000 [id=25] INFO jenkins.InitReactorRunner$1#onAttained: Loaded all jobs
2020-11-13 10:59:47.024+0000 [id=26] INFO jenkins.InitReactorRunner$1#onAttained: Configuration for all jobs updated
2020-11-13 10:59:47.302+0000 [id=39] INFO hudson.model.AsyncPeriodicWork#lambda$doRun$0: Started Download metadata
2020-11-13 10:59:47.307+0000 [id=39] INFO hudson.util.Retrier#start: Attempt #1 to do the action check updates server
2020-11-13 10:59:47.759+0000 [id=25] INFO o.s.c.s.AbstractApplicationContext#prepareRefresh: Refreshing org.springframework.web.context.support.StaticWebApplicationContext@14cdb6f9: display name [Root WebApplicationContext]; startup date [Fri Nov 13 10:59:47 UTC 2020]; root of context hierarchy
2020-11-13 10:59:47.759+0000 [id=25] INFO o.s.c.s.AbstractApplicationContext#obtainFreshBeanFactory: Bean factory for application context [org.springframework.web.context.support.StaticWebApplicationContext@14cdb6f9]: org.springframework.beans.factory.support.DefaultListableBeanFactory@20c82d2b
2020-11-13 10:59:47.767+0000 [id=25] INFO o.s.b.f.s.DefaultListableBeanFactory#preInstantiateSingletons: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@20c82d2b: defining beans [authenticationManager]; root of factory hierarchy
2020-11-13 10:59:47.942+0000 [id=25] INFO o.s.c.s.AbstractApplicationContext#prepareRefresh: Refreshing org.springframework.web.context.support.StaticWebApplicationContext@1875d206: display name [Root WebApplicationContext]; startup date [Fri Nov 13 10:59:47 UTC 2020]; root of context hierarchy
2020-11-13 10:59:47.943+0000 [id=25] INFO o.s.c.s.AbstractApplicationContext#obtainFreshBeanFactory: Bean factory for application context [org.springframework.web.context.support.StaticWebApplicationContext@1875d206]: org.springframework.beans.factory.support.DefaultListableBeanFactory@208ff471
2020-11-13 10:59:47.943+0000 [id=25] INFO o.s.b.f.s.DefaultListableBeanFactory#preInstantiateSingletons: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@208ff471: defining beans [filter,legacy]; root of factory hierarchy
2020-11-13 10:59:48.181+0000 [id=25] INFO jenkins.install.SetupWizard#init:

*************************************************************
*************************************************************
*************************************************************

Jenkins initial setup is required. An admin user has been created and a password generated.
Please use the following password to proceed to installation:

d26af10d688e43489241f1771b17dfad

This may also be found at: /var/jenkins_home/secrets/initialAdminPassword

*************************************************************
*************************************************************
*************************************************************

2020-11-13 11:00:07.560+0000 [id=39] INFO hudson.util.Retrier#start: The attempt #1 to do the action check updates server failed with an allowed exception:
java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:607)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:666)
at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1162)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1570)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:268)
at hudson.model.DownloadService.loadJSON(DownloadService.java:116)
at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:216)
at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:211)
at hudson.PluginManager.checkUpdatesServer(PluginManager.java:1768)
at hudson.util.Retrier.start(Retrier.java:63)
at hudson.PluginManager.doCheckUpdatesServer(PluginManager.java:1739)
at jenkins.DailyCheck.execute(DailyCheck.java:93)
at hudson.model.AsyncPeriodicWork.lambda$doRun$0(AsyncPeriodicWork.java:100)
at java.lang.Thread.run(Thread.java:748)
2020-11-13 11:00:07.561+0000 [id=39] INFO hudson.util.Retrier#start: Calling the listener of the allowed exception 'connect timed out' at the attempt #1 to do the action check updates server
2020-11-13 11:00:07.566+0000 [id=39] INFO hudson.util.Retrier#start: Attempted the action check updates server for 1 time(s) with no success
2020-11-13 11:00:07.570+0000 [id=39] SEVERE hudson.PluginManager#doCheckUpdatesServer: Error checking update sites for 1 attempt(s). Last exception was: SocketTimeoutException: connect timed out
2020-11-13 11:00:07.576+0000 [id=39] INFO hudson.model.AsyncPeriodicWork#lambda$doRun$0: Finished Download metadata. 20,273 ms
2020-11-13 11:00:17.721+0000 [id=25] INFO jenkins.InitReactorRunner$1#onAttained: Completed initialization
2020-11-13 11:00:17.729+0000 [id=19] INFO hudson.WebAppMain$3#run: Jenkins is fully up and running

Insert the password : d26af10d688e43489241f1771b17dfad

8. Clean UP | Conclusion of the TEST:

talosctl cluster destroy

😊 DevOps enthusiastic !!!