Tag: KUBERNETES

Web site deployed on 2 Kubernetes clusters in Frankfurt and Ashburn connected through an internal remote peering connection to a WebLogic+OracleDB backend deployed in Frankfurt


This is a 3 tier application with a front web with lots of static content served by Apache connected to a Java backend exposing services and application logic deployed on a WebLogic cluster connected as well to an Oracle Autonomous database for data storage and other business logic. WebLogic cluster is deployed on k8s using … Continue reading Web site deployed on 2 Kubernetes clusters in Frankfurt and Ashburn connected through an internal remote peering connection to a WebLogic+OracleDB backend deployed in Frankfurt →

Building a docker image, pushing to OCIR and deploying to OKE with DevCS


OCIR=Oracle Cloud Infrastrure Registry OKE=Oracle Kubernetes Engine DevCS=Developer Cloud Service Step 1: Create a new git repo or clon one existing with the code for building the image Step2: Create a new job Step3: Set the git repo Step4: Add docker login step The purpose is to login to the OCIR (OCI Registry). User is … Continue reading Building a docker image, pushing to OCIR and deploying to OKE with DevCS →

Moving a 15-year-old Java 1.4 Application from Oracle AS 10g to WebLogic 12g on Kubernetes in Record Timeframe not Dying in the Intent nor Losing any Line of Code


Not all monoliths should be killed because they are! This is the true story about migration and modernisation of a travel sector solution based on ADF, Java 1.4, Struts, Jac¡vaScript and PHP running on Oracle Application Server 10 and Oracle 10g database. Perhaps old people in town can remember things such as OAS, OC4J, jHeadStart, … Continue reading Moving a 15-year-old Java 1.4 Application from Oracle AS 10g to WebLogic 12g on Kubernetes in Record Timeframe not Dying in the Intent nor Losing any Line of Code →

oke-cluster-start-stop, a kubectl Plugin for starting/stopping all the Compute Nodes of an OKE Cluster


If you want to start or stop all of your OKE data plane cluster nodes you must go to all the nodes and execute the action one by one. The current post depicts a kubectl plugin extension created for helping you to start/stop your oke clusters. NOTES: The tool has been developed and tested in … Continue reading oke-cluster-start-stop, a kubectl Plugin for starting/stopping all the Compute Nodes of an OKE Cluster →

“Kool” Kubernetes Client Tools


When working with k8s, you typically have several clusters and a bunch of namespaces per cluster, the following tools can help you manage the stuff with easy. kubectx + kubens kubectx allows you to change the context between different k8s clusters kubens allows you to change between different namespaces in the current cluster context brew … Continue reading “Kool” Kubernetes Client Tools →

Set Up an Ingress Controller in OKE Cluster


Here a recipe to create a ingresscontroller. Step 1: setting up the nginx ingress controller kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/mandatory.yaml Step 2: exposing the ingress as a service of type LoadBalancer (as a public IP) kubectl apply -f https://raw.githubusercontent.com/javiermugueta/rawcontent/master/cloud-generic.yaml Step 3: Execute this command several times until the external-ip appears as non <pending>, grab the IP … Continue reading Set Up an Ingress Controller in OKE Cluster →

Deploying a Coherence Cluster in Kubernetes


Coherence-Operator is a Kubernetes opeartor for deploying Oracle Coherence in k8s. Let's see how to do it. 1 Clean previous setup intents: helm del --purge sample-coherence helm del --purge sample-coherence-operator kubectl delete namespace sample-coherence-ns 2 Execute the following: kubectl config set-context $(kubectl config current-context) --namespace=sample-coherence-ns helm repo add coherence https://oracle.github.io/coherence-operator/charts helm repo update helm --debug … Continue reading Deploying a Coherence Cluster in Kubernetes →

Shared Disk Seen by Pods Deployed in two Independent OKE Clusters across two Cloud Regions | Remote Network Peering


In this episode we are creating 2 independent OKE clusters, one in Frankfurt and the other in Phoenix, and then we will create a File System in Frankfurt (kind of NFS server) that will act as repository for a shared persistent volume reachable by all the pods of a deployment deployed to both clusters. Remote … Continue reading Shared Disk Seen by Pods Deployed in two Independent OKE Clusters across two Cloud Regions | Remote Network Peering →

Creating a Fast&Simple Container for Sending Messages to a Topic in Oracle Event Hub Cloud Service (aka OEHCS, which is a Kafka cluster) and Deploying it to Kubernetes Cluster


The container uses 4 environment variables, you can find a container already built for you here SOURCE CODE OF THE PRODUCER var sleep = require('system-sleep'); const oehcs_connect_url = process.env.OEHCS_CONNECTURL const topic_name = process.env.TOPIC_NAME const num_partitions = process.env.NUM_PARTITIONS const message = process.env.MESSAGE var kafka = require('kafka-node'), HighLevelProducer = kafka.HighLevelProducer, client = new kafka.KafkaClient({kafkaHost: oehcs_connect_url}), producer = new … Continue reading Creating a Fast&Simple Container for Sending Messages to a Topic in Oracle Event Hub Cloud Service (aka OEHCS, which is a Kafka cluster) and Deploying it to Kubernetes Cluster →