Install Weblogic k8s Operator into Minikube on Fedora

HOWTO

• Weblogic k8s Operator - Get Started tutorial  https://oracle.github.io/weblogic-kubernetes-operator/quickstart/
• Summary for quick start tutorial https://oracle.github.io/weblogic-kubernetes-operator/quickstart/summary/
• Install minikube https://minikube.sigs.k8s.io/docs/start/
• https://stackoverflow.com/questions/42564058/how-can-i-use-local-docker-images-with-minikube
  
• Ingress setup https://kubernetes.io/docs/tasks/access-application-cluster/ingress-minikube/
• Oracle Container Registry https://container-registry.oracle.com/

Summary 

Preparation - install required software

Install kubectl, Docker on Fedora 

[dave@fedora ~]$ sudo yum install -y kubectl
[sudo] password for dave: 
Kubernetes                                                                                               15 kB/s | 9.9 kB     00:00    
Dependencies resolved.
========================================================================================================================================
 Package                      Architecture                Version                                 Repository                       Size
========================================================================================================================================
Installing:
 kubectl                      x86_64                      1.29.2-150500.1.1                       kubernetes                       10 M

Transaction Summary
========================================================================================================================================
Install  1 Package

Total download size: 10 M
Installed size: 47 M
Downloading Packages:
kubectl-1.29.2-150500.1.1.x86_64.rpm                                                                    4.3 MB/s |  10 MB     00:02    
----------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                   4.3 MB/s |  10 MB     00:02     
Kubernetes                                                                                              4.5 kB/s | 1.7 kB     00:00    
Importing GPG key 0x9A296436:
 Userid     : "isv:kubernetes OBS Project <isv:kubernetes@build.opensuse.org>"
 Fingerprint: DE15 B144 86CD 377B 9E87 6E1A 2346 54DA 9A29 6436
 From       : https://pkgs.k8s.io/core:/stable:/v1.29/rpm/repodata/repomd.xml.key
Key imported successfully
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                                1/1 
  Installing       : kubectl-1.29.2-150500.1.1.x86_64                                                                               1/1 
  Verifying        : kubectl-1.29.2-150500.1.1.x86_64                                                                               1/1 

Installed:
  kubectl-1.29.2-150500.1.1.x86_64                                                                                                      

Complete!
[dave@fedora ~]$ kubectl cluster-info
E0302 10:33:57.899032   16797 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0302 10:33:57.899346   16797 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0302 10:33:57.900515   16797 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0302 10:33:57.900783   16797 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0302 10:33:57.902197   16797 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
The connection to the server localhost:8080 was refused - did you specify the right host or port?
[dave@fedora ~]$ yum install bash-completion, etc.

^C
[dave@fedora ~]$ ,^C
[dave@fedora ~]$ sudo yum install -y kubectl^C
[dave@fedora ~]$ sudo yum install -y bash-completion
Last metadata expiration check: 0:01:26 ago on Sat 02 Mar 2024 10:33:42 AM CET.
Package bash-completion-1:2.11-9.fc38.noarch is already installed.
Dependencies resolved.
Nothing to do.
Complete!
[dave@fedora ~]$ echo 'source <(kubectl completion bash)'>>~/.bashrc
[dave@fedora ~]$ docker p[s
docker: 'p[s' is not a docker command.
See 'docker --help'
[dave@fedora ~]$ docker ps
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[dave@fedora ~]$ sudo docker ps
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[dave@fedora ~]$  sudo systemctl start docker
[dave@fedora ~]$  sudo docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

[dave@fedora ~]$ sudo systemctl enable docker.service
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
[dave@fedora ~]$ sudo systemctl enable containerd.service
Created symlink /etc/systemd/system/multi-user.target.wants/containerd.service → /usr/lib/systemd/system/containerd.service.
[dave@fedora ~]$ docker ps
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
[dave@fedora ~]$ docker images
REPOSITORY    TAG       IMAGE ID       CREATED         SIZE
hello-world   latest    9c7a54a9a43c   10 months ago   13.3kB
[dave@fedora ~]$ docker ps -a
CONTAINER ID   IMAGE         COMMAND    CREATED          STATUS                      PORTS     NAMES
01a3a0f66b45   hello-world   "/hello"   52 seconds ago   Exited (0) 52 seconds ago             sleepy_rhodes
4c9e871bc2b0   hello-world   "/hello"   4 months ago     Exited (0) 4 months ago               naughty_nobel

Install minikube

[dave@fedora ~]$ curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-latest.x86_64.rpm
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 19.3M  100 19.3M    0     0  4897k      0  0:00:04  0:00:04 --:--:-- 4898k
[dave@fedora ~]$ sudo rpm -Uvh minikube-latest.x86_64.rpm
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:minikube-1.32.0-0                ################################# [100%]
[dave@fedora ~]$ minikube start
😄  minikube v1.32.0 on Fedora 38
^C
[dave@fedora ~]$ minikube start --driver=docker
😄  minikube v1.32.0 on Fedora 38
✨  Using the docker driver based on user configuration
📌  Using Docker driver with root privileges
👍  Starting control plane node minikube in cluster minikube
🚜  Pulling base image ...
💾  Downloading Kubernetes v1.28.3 preload ...
    > preloaded-images-k8s-v18-v1...:  403.35 MiB / 403.35 MiB  100.00% 2.72 Mi
    > gcr.io/k8s-minikube/kicbase...:  453.90 MiB / 453.90 MiB  100.00% 2.86 Mi
🔥  Creating docker container (CPUs=2, Memory=3900MB) ...
🐳  Preparing Kubernetes v1.28.3 on Docker 24.0.7 ...
    ▪ Generating certificates and keys ...
    ▪ Booting up control plane ...
    ▪ Configuring RBAC rules ...
🔗  Configuring bridge CNI (Container Networking Interface) ...
    ▪ Using image gcr.io/k8s-minikube/storage-provisioner:v5
🔎  Verifying Kubernetes components...
🌟  Enabled addons: storage-provisioner, default-storageclass
🏄  Done! kubectl is now configured to use "minikube" cluster and "default" namespace by default

Install helm

[dave@fedora ~]$ kubectl create namespace sample-weblogic-operator-ns
namespace/sample-weblogic-operator-ns created
[dave@fedora ~]$ kubectl create serviceaccount -n sample-weblogic-operator-ns sample-weblogic-operator-sa
serviceaccount/sample-weblogic-operator-sa created
[dave@fedora ~]$ helm repo add weblogic-operator https://oracle.github.io/weblogic-kubernetes-operator/charts --force-update  
bash: helm: command not found...
Install package 'helm' to provide command 'helm'? [N/y] y


 * Waiting in queue... 
 * Loading list of packages.... 
The following packages have to be installed:
 helm-3.11.1-1.fc38.x86_64    The Kubernetes Package Manager
Proceed with changes? [N/y] y


 * Waiting in queue... 
 * Waiting for authentication... 
 * Waiting in queue... 
 * Downloading packages... 
 * Requesting data... 
 * Testing changes... 
 * Installing packages... 
"weblogic-operator" has been added to your repositories

[dave@fedora ~]$ helm install sample-weblogic-operator weblogic-operator/weblogic-operator \
  --namespace sample-weblogic-operator-ns \
  --set serviceAccount=sample-weblogic-operator-sa \
  --wait
NAME: sample-weblogic-operator
LAST DEPLOYED: Sat Mar  2 10:54:00 2024
NAMESPACE: sample-weblogic-operator-ns
STATUS: deployed
REVISION: 1
TEST SUITE: None
[dave@fedora ~]$ kubectl get pods -n sample-weblogic-operator-ns
NAME                                         READY   STATUS    RESTARTS   AGE
weblogic-operator-85cb6f9d8b-r6vrk           1/1     Running   0          96s
weblogic-operator-webhook-7c6cd97f67-dlw2p   1/1     Running   0          96s
[dave@fedora ~]$ kubectl logs -n sample-weblogic-operator-ns -c weblogic-operator deployments/weblogic-operator
Launching Oracle WebLogic Server Kubernetes Operator...
VM settings:
    Max. Heap Size (Estimated): 10.73G
    Using VM: Java HotSpot(TM) 64-Bit Server VM

{"timestamp":"2024-03-02T09:54:31.093569933Z","thread":1,"fiber":"","namespace":"","domainUID":"","level":"INFO","class":"oracle.kubernetes.operator.helpers.HealthCheckHelper","method":"createAndValidateKubernetesVersion","timeInMillis":1709373271093,"message":"Kubernetes version is: v1.28.3","exception":"","code":"","headers":{},"body":""}
{"timestamp":"2024-03-02T09:54:31.193860709Z","thread":1,"fiber":"","namespace":"","domainUID":"","level":"INFO","class":"oracle.kubernetes.operator.OperatorMain$MainDelegateImpl","method":"logStartup","timeInMillis":1709373271193,"message":"Oracle WebLogic Kubernetes Operator, version: 4.1.8, implementation: 7abe1c872e14c58b07e4fc8750b46af1c1a25c17.7abe1c8, build time: 2024-01-30T20:19:12+0000","exception":"","code":"","headers":{},"body":""}
{"timestamp":"2024-03-02T09:54:31.196011015Z","thread":1,"fiber":"","namespace":"","domainUID":"","level":"INFO","class":"oracle.kubernetes.operator.OperatorMain$MainDelegateImpl","method":"lambda$logStartup$0","timeInMillis":1709373271196,"message":"The following optional operator features are enabled: []","exception":"","code":"","headers":{},"body":""}
{"timestamp":"2024-03-02T09:54:31.19825166Z","thread":1,"fiber":"","namespace":"","domainUID":"","level":"INFO","class":"oracle.kubernetes.operator.OperatorMain$MainDelegateImpl","method":"logStartup","timeInMillis":1709373271198,"message":"Operator namespace is: sample-weblogic-operator-ns","exception":"","code":"","headers":{},"body":""}
{"timestamp":"2024-03-02T09:54:31.199235192Z","thread":1,"fiber":"","namespace":"","domainUID":"","level":"INFO","class":"oracle.kubernetes.operator.OperatorMain$MainDelegateImpl","method":"logStartup","timeInMillis":1709373271199,"message":"Operator service account is: sample-weblogic-operator-sa","exception":"","code":"","headers":{},"body":""}
{"timestamp":"2024-03-02T09:54:32.072311815Z","thread":60,"fiber":"-fiber-1 NOT_COMPLETE","namespace":"","domainUID":"","level":"INFO","class":"oracle.kubernetes.operator.OperatorMain$ReadResponseStep","method":"onSuccess","timeInMillis":1709373272072,"message":"The Custom Resource Definition (CRD) for domains.weblogic.oracle is not installed, waiting for 10 seconds for the CRD to be installed.","exception":"","code":"","headers":{},"body":""}
{"timestamp":"2024-03-02T09:54:42.477270833Z","thread":74,"fiber":"fiber-1 NOT_COMPLETE","namespace":"","domainUID":"","level":"INFO","class":"oracle.kubernetes.operator.OperatorMain","method":"logStartingLivenessMessage","timeInMillis":1709373282477,"message":"Starting operator liveness Thread","exception":"","code":"","headers":{},"body":""}

Install Traefik ingress controller

[dave@fedora ~]$ helm repo add traefik https://helm.traefik.io/traefik --force-update
"traefik" has been added to your repositories
[dave@fedora ~]$ kubectl create namespace traefik
namespace/traefik created
[dave@fedora ~]$ helm install traefik-operator traefik/traefik \
    --namespace traefik \
    --set "ports.web.nodePort=30305" \
    --set "ports.websecure.nodePort=30443" \
    --set "kubernetes.namespaces={traefik}"
NAME: traefik-operator
LAST DEPLOYED: Sat Mar  2 11:03:03 2024
NAMESPACE: traefik
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
Traefik Proxy v2.11.0 has been deployed successfully on traefik namespace !

Prepare domain

[dave@fedora ~]$ kubectl create namespace sample-domain1-ns
namespace/sample-domain1-ns created
[dave@fedora ~]$ kubectl label ns sample-domain1-ns weblogic-operator=enabled
namespace/sample-domain1-ns labeled
[dave@fedora ~]$ helm upgrade traefik-operator traefik/traefik \
    --namespace traefik \
    --reuse-values \
    --set "kubernetes.namespaces={traefik,sample-domain1-ns}"
Release "traefik-operator" has been upgraded. Happy Helming!
NAME: traefik-operator
LAST DEPLOYED: Sat Mar  2 11:05:34 2024
NAMESPACE: traefik
STATUS: deployed
REVISION: 2
TEST SUITE: None
NOTES:
Traefik Proxy v2.11.0 has been deployed successfully on traefik namespace !

Configure Oracle Docker Registry - OCR

kubectl create secret docker-registry weblogic-repo-credentials \
     --docker-server=container-registry.oracle.com \
     --docker-username=YOUR_REGISTRY_USERNAME \
     --docker-password=YOUR_REGISTRY_PASSWORD \
     --docker-email=YOUR_REGISTRY_EMAIL \
     -n sample-domain1-ns

Create domain

[dave@fedora ~]$ kubectl create secret generic sample-domain1-weblogic-credentials \
  --from-literal=username=weblogic --from-literal=password=weblogic123 \
  -n sample-domain1-ns
secret/sample-domain1-weblogic-credentials created
[dave@fedora ~]$ kubectl -n sample-domain1-ns create secret generic \
  sample-domain1-runtime-encryption-secret \
   --from-literal=password=weblogic123        
secret/sample-domain1-runtime-encryption-secret created
[dave@fedora ~]$ kubectl apply -f https://raw.githubusercontent.com/oracle/weblogic-kubernetes-operator/release/4.1/kubernetes/samples/quick-start/domain-resource.yaml
domain.weblogic.oracle/sample-domain1 created
cluster.weblogic.oracle/sample-domain1-cluster-1 created
[dave@fedora ~]$ kubectl describe domain sample-domain1 -n sample-domain1-ns
Name:         sample-domain1
Namespace:    sample-domain1-ns
Labels:       weblogic.domainUID=sample-domain1
Annotations:  <none>
API Version:  weblogic.oracle/v9
Kind:         Domain
Metadata:
  Creation Timestamp:  2024-03-02T10:15:11Z
  Generation:          1
  Resource Version:    1828
  UID:                 a1b57948-d186-4793-a2d2-a1628f4fdf48
Spec:
  Clusters:
    Name:  sample-domain1-cluster-1
  Configuration:
    Model:
      Auxiliary Images:
        Image:                       phx.ocir.io/weblogick8s/quick-start-aux-image:v1
      Domain Type:                   WLS
      Runtime Encryption Secret:     sample-domain1-runtime-encryption-secret
    Override Distribution Strategy:  Dynamic
  Domain Home:                       /u01/domains/sample-domain1
  Domain Home Source Type:           FromModel
  Failure Retry Interval Seconds:    120
  Failure Retry Limit Minutes:       1440
  Http Access Log In Log Home:       true
  Image:                             container-registry.oracle.com/middleware/weblogic:12.2.1.4
  Image Pull Policy:                 IfNotPresent
  Image Pull Secrets:
    Name:                             weblogic-repo-credentials
  Include Server Out In Pod Log:      true
  Introspect Version:                 1
  Max Cluster Concurrent Shutdown:    1
  Max Cluster Concurrent Startup:     0
  Max Cluster Unavailable:            1
  Replace Variables In Java Options:  false
  Replicas:                           1
  Restart Version:                    1
  Server Pod:
    Env:
      Name:   JAVA_OPTIONS
      Value:  -Dweblogic.StdoutDebugEnabled=false
      Name:   USER_MEM_ARGS
      Value:  -Djava.security.egd=file:/dev/./urandom -Xms256m -Xmx512m 
    Resources:
      Requests:
        Cpu:            250m
        Memory:         768Mi
  Server Start Policy:  IfNeeded
  Web Logic Credentials Secret:
    Name:  sample-domain1-weblogic-credentials
Status:
  Clusters:
  Conditions:
    Last Transition Time:  2024-03-02T10:15:12.031510Z
    Status:                False
    Type:                  Available
    Last Transition Time:  2024-03-02T10:15:12.031187Z
    Status:                False
    Type:                  Completed
  Observed Generation:     1
  Servers:
  Start Time:  2024-03-02T10:15:12.031167Z
Events:
  Type    Reason   Age   From               Message
  ----    ------   ----  ----               -------
  Normal  Created  19s   weblogic.operator  Domain sample-domain1 was created.
[dave@fedora ~]$ kubectl get domain sample-domain1 -n sample-domain1-ns -o json | jq .status
{
  "clusters": [],
  "conditions": [
    {
      "lastTransitionTime": "2024-03-02T10:15:12.031510Z",
      "status": "False",
      "type": "Available"
    },
    {
      "lastTransitionTime": "2024-03-02T10:15:12.031187Z",
      "status": "False",
      "type": "Completed"
    }
  ],
  "observedGeneration": 1,
  "servers": [],
  "startTime": "2024-03-02T10:15:12.031167Z"
}
[dave@fedora ~]$ kubectl apply -f https://raw.githubusercontent.com/oracle/weblogic-kubernetes-operator/release/4.1/kubernetes/samples/quick-start/domain-resource.yaml
^C
[dave@fedora ~]$ kubectl get domain sample-domain1 -n sample-domain1-ns -o json | jq .status
{
  "clusters": [],
  "conditions": [
    {
      "lastTransitionTime": "2024-03-02T10:15:12.031510Z",
      "status": "False",
      "type": "Available"
    },
    {
      "lastTransitionTime": "2024-03-02T10:15:12.031187Z",
      "status": "False",
      "type": "Completed"
    }
  ],
  "observedGeneration": 1,
  "servers": [],
  "startTime": "2024-03-02T10:15:12.031167Z"
}
[dave@fedora ~]$ kubectl get domain sample-domain1 -n sample-domain1-ns -o jsonpath='{.status}'
{"clusters":[],"conditions":[{"lastTransitionTime":"2024-03-02T10:15:12.031510Z","status":"False","type":"Available"},{"lastTransitionTime":"2024-03-02T10:15:12.031187Z","status":"False","type":"Completed"}],"observedGenerationkubectl get pods -n sample-domain1-ns-02T10:15:12.031167Z"}[dave@fedora ~]$ kubectl get pods -n sample-domain1-ns
NAME                                READY   STATUS            RESTARTS   AGE
sample-domain1-introspector-dtjdm   0/1     PodInitializing   0          92s

Create an ingress route for the domain - see https://github.com/dveselka/weblogic/blob/master/k8s/quickstart/ingress-route.yaml

$ cat ingress-route.yaml 
# Copyright (c) 2022, Oracle and/or its affiliates.
# Licensed under the Universal Permissive License v 1.0 as shown at https://oss.oracle.com/licenses/upl.

apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: console
  namespace: sample-domain1-ns
spec:
  routes:
    - kind: Rule
      match: PathPrefix(`/console`)
      services:
        - kind: Service
          name: sample-domain1-admin-server
          port: 7001
---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: quickstart
  namespace: sample-domain1-ns
spec:
  routes:
  - kind: Rule
    match: PathPrefix(`/quickstart`)
    services:
    - kind: Service
      name: sample-domain1-cluster-cluster-1
      port: 8001

$ kubectl apply -f ingress-route.yaml \
  --namespace sample-domain1-ns
ingressroute.traefik.containo.us/console created
ingressroute.traefik.containo.us/quickstart created

Access the Weblogic console Use minikube ip

[dave@fedora k8s]$ minikube ip
192.168.49.2

Use browser with console URL using minikube IP