Jun 25

my SAA-C02 journey

AWS Certified Solutions Architect — Associate I passed AWS Certified Solutions Architect — Associate in June 2022. My preparation: I started using AWS probably 3 years ago, but mostly just EC2 and S3 I started watching Neal Davis training video a year ago and followed some of the lab sessions …

AWS

1 min read

Published in CI/CD/DevOps

·May 31

steps to deploy gitlab runner in k8s

in AKS Here, I am hoping to document the exact steps I took to deploy an gitab runner in AKS (Azure Kuberenetes Service): create a AKS cluster #!/bin/bash set -x subscriptionID="xxxxx-yyyy-zzz" resourceGroupName="SG-RG-CDX-AKS" # create AZ resource group az group create…

Dev Ops

2 min read

May 21

web technology trend using Google search

as of 2022.05 I used Google to explore the popularity of a few software technology. SpringBoot vs GraphQL

Trending

2 min read

web technology trend using Google search

as of 2022.05

I used Google to explore the popularity of a few software technology.

SpringBoot vs GraphQL

Published in CI/CD/DevOps

·May 14

[ERROR] Error executing Maven. [ERROR] java.lang.IllegalStateException: Unable to load cache item

on ubuntu 18.04, the latest maven version from apt is still Apache Maven 3.6.0, which doesn’t support jdk17, and we will get the above titled error when executing mvn install. to fix this, we need to manually download and install apache-maven-3.8.5. cd /tmp wget https://dlcdn.apache.org/maven/maven-3/3.8.5/binaries/apache-maven-3.8.5-bin.tar.gz tar xvf apache-maven-3.8.5-bin.tar.gz cd /usr/share/maven sudo cp /tmp/apache-maven-3.8.5/* .

Dev Ops

1 min read

[ERROR] Error executing Maven. [ERROR] java.lang.IllegalStateException: Unable to load cache item

on ubuntu 18.04, the latest maven version from apt is still Apache Maven 3.6.0, which doesn’t support jdk17, and we will get the above titled error when executing mvn install.

to fix this, we need to manually download and install apache-maven-3.8.5.

cd /tmp
wget https://dlcdn.apache.org/maven/maven-3/3.8.5/binaries/apache-maven-3.8.5-bin.tar.gz
tar xvf apache-maven-3.8.5-bin.tar.gzcd /usr/share/maven
sudo cp /tmp/apache-maven-3.8.5/* .

now we have

$ mvn -version
Apache Maven 3.8.5 (3599d3414f046de2324203b78ddcf9b5e4388aa0)
Maven home: /usr/share/maven
Java version: 17.0.3, vendor: Private Build, runtime: /usr/lib/jvm/java-17-openjdk-amd64
Default locale: en, platform encoding: UTF-8
OS name: "linux", version: "5.4.0-1072-aws", arch: "amd64", family: "unix"

verify

git clone https://github.com/WebGoat/WebGoat/
cd WebGoat/
mvn clean install -DskipTests[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  34.203 s
[INFO] Finished at: 2022-05-14T01:56:47Z
[INFO] ------------------------------------------------------------------------

Published in CI/CD/DevOps

·May 1

Interacting with k8s cluster using go

installing go 1.18 wget https://go.dev/dl/go1.18.1.linux-amd64.tar.gz sudo tar -C /usr/local -xvf go1.18.1.linux-amd64.tar.gz go version setup Go environment by appending below to your ~/.profile export GOPATH=$HOME/work export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin create a Go project workspace cd ~ mkdir -p work/k8s-api-test touch main.go create a simple Go program (from https://github.com/kubernetes/client-go/blob/master/examples/out-of-cluster-client-configuration/main.go)

Dev Ops

2 min read

Published in CI/CD/DevOps

·Apr 29

Exception in thread “main” java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema

a ridiculous debugging story while trying to install Android Studio headlessly on my Mac, I bumped into the commonly seen *license not accepted* problem, so I googled and tried to batch accept all the license with yes | sudo sdkmanager --licenses and I got Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema…

Dev Ops

1 min read

Published in CI/CD/DevOps

·Apr 29

Error: Cask adoptopenjdk8 exists in multiple taps:

how to uninstall openjdk8 on Mac My openJDK was installed in /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home I run into the following error when trying to uninstall it on Mac: $brew uninstall adoptopenjdk8 Error: Cask adoptopenjdk8 exists in multiple taps: homebrew/cask-versions/adoptopenjdk8 adoptopenjdk/openjdk/adoptopenjdk8 I fixed this with brew uninstall adoptopenjdk/openjdk/adoptopenjdk8 ==> Uninstalling Cask adoptopenjdk8 ==> Uninstalling packages; your password may be necessary: net.adoptopenjdk.8.jdk Password: ==> Purging files for version 8,292:b10 of Cask adoptopenjdk8

Dev Ops

1 min read

Error: Cask adoptopenjdk8 exists in multiple taps:

how to uninstall openjdk8 on Mac

My openJDK was installed in /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home

I run into the following error when trying to uninstall it on Mac:

$brew uninstall adoptopenjdk8
Error: Cask adoptopenjdk8 exists in multiple taps:
  homebrew/cask-versions/adoptopenjdk8
  adoptopenjdk/openjdk/adoptopenjdk8

I fixed this with

brew uninstall adoptopenjdk/openjdk/adoptopenjdk8
==> Uninstalling Cask adoptopenjdk8
==> Uninstalling packages; your password may be necessary:
net.adoptopenjdk.8.jdk
Password:
==> Purging files for version 8,292:b10 of Cask adoptopenjdk8

Apr 23

try Eclipse: Che from WSL:ubuntu18.04 for first time

The steps with reference install minikube launch minikube with ingress install chectl (https://www.eclipse.org/che/docs/che-7/installation-guide/using-the-chectl-management-tool/) installing Che on Minikube using chectl (https://www.eclipse.org/che/docs/che-7/installation-guide/installing-che-on-minikube/) $ sudo apt install minitube $ bash <(curl -sL https://www.eclipse.org/che/chectl/) $ which chectl $ chectl --version

Dev Ops

2 min read

Published in CI/CD/DevOps

·Apr 23

What you can’t find with a SAST tool

by SAST, I mean Static Application Security Tool. A lot of configuration issues yes, in general, SAST tools (especially commercial ones) do provide lot of built-in checkers (rules) to find configuration related issues from source, for example, hard-coded credentials, database password stored in plain text, unsecured default spring configurations, however…

Sast

2 min read

Published in CI/CD/DevOps

·Feb 10

The network interface can’t be deleted; Network interface is currently in use.

this post saved my day: https://stackoverflow.com/questions/37232965/issue-when-trying-to-delete-vpc-and-network-interface I used terraform to deploy some infra including a VPC, EKS and RDS; and when I tried to run terrafrom destroy , it times out and the VPC is lingering there; so I tried to login to aws console and tried to delete the…

Debugging

1 min read

my SAA-C02 journey

steps to deploy gitlab runner in k8s

web technology trend using Google search

web technology trend using Google search

SpringBoot vs GraphQL

[ERROR] Error executing Maven. [ERROR] java.lang.IllegalStateException: Unable to load cache item

[ERROR] Error executing Maven. [ERROR] java.lang.IllegalStateException: Unable to load cache item

Interacting with k8s cluster using go

Exception in thread “main” java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema

Error: Cask adoptopenjdk8 exists in multiple taps:

Error: Cask adoptopenjdk8 exists in multiple taps:

try Eclipse: Che from WSL:ubuntu18.04 for first time

What you can’t find with a SAST tool

The network interface can’t be deleted; Network interface is currently in use.

Shi