While starting my journey with AWS CDKs (Cloud Development Kit), I encountered the below error in the very first step of the installation of AWS CDK on my Ubuntu 22.04 system. Installation Command npm install -g aws-cdk While the command run through without any error, I observed Warning messages related to the version of nodejs. … Continue reading Installation Error – AWS CDK
Tech Bites
Kubernetes Upgrade v1.23 to v1.24 – Common Errors and Solutions
Unlike the common notion of "if it ain't broke, don't fix it", I thought of upgrading my lab Kubernetes cluster from v1.23 to v1.24, just for fun. Now since it was a lab, it's easier for me to decide and simply go on with it, but for production, of course, you need to decide if … Continue reading Kubernetes Upgrade v1.23 to v1.24 – Common Errors and Solutions
Docker Desktop for Linux – Ubuntu 22.04 + Docker Desktop 4.8.0
Docker Con 2022's biggest highlight was the launch of the Docker Desktop for Linux Users. For Windows and Mac users, this setup was already available for obvious reasons. But for Ubuntu desktop users like me, the only way to work was to use the Docker CLI for calling the backend containerd run time engine. Hence, … Continue reading Docker Desktop for Linux – Ubuntu 22.04 + Docker Desktop 4.8.0
Infra as Code for OpenStack with Ansible-Git Workflow: Part 2
In our previous blog, we worked on the instantiation of a new Virtual machine on the OpenStack cloud using Ansible. In this blog, we will be covering the second scenario, where the trigger to perform LCM on the newly created VM shall arrive from GitLab via Webhook. For a recap, refer to the previous blog, … Continue reading Infra as Code for OpenStack with Ansible-Git Workflow: Part 2
Docker Image Scan with SYFT
As we move toward the Zero-Trust model for Infosecurity, concern over application-level security deployed on containers is raised by the security experts. Recently, a vulnerability CVE-2022-0811 identified in the CRI container runtime engine has turned this fact into reality. For those who are not aware, as per CrowdStrike, when invoked, an attacker could escape from … Continue reading Docker Image Scan with SYFT
Self-Signed Certificate for GitLab 13.10.3
GitLab can be installed on the private cloud with access to internal applications for code repositories. GitLab application uses an in-build Nginx web service with the option to use either HTTP or HTTPS, based on internal info-security requirements. To use HTTPS, we need to provide the Gitlab application with an updated SSL certificate. We can … Continue reading Self-Signed Certificate for GitLab 13.10.3
Minikube Error – apiserver certificate: failed to load certificate: the certificate has expired
I recently faced one error in my old single host minikube deployment on CentOS. While starting my minikube cluster, I was repeatedly getting below error, [certs] Using existing ca certificate authority stderr: W0419 03:27:58.522598 568 configset.go:348] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io] [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup … Continue reading Minikube Error – apiserver certificate: failed to load certificate: the certificate has expired
Infra as Code for OpenStack with Ansible-Git Workflow: Part 1
Ansible provides a powerful configuration and workflow management tool, which can easily be applied to perform Infrastructure as Code use cases on OpenStack. For my setup, I am using Ansible 2.9.11 in sync with Gitlab for the code repository and source control for playbooks. For this solution, I will proceed with two steps, Scenario 1: … Continue reading Infra as Code for OpenStack with Ansible-Git Workflow: Part 1
[Part 5] Python3: Basics for Beginners – Dictionary & Modules
In Part 4 for our python3 basics for beginners blog, we read about different type of loops and their use. In this blog, we extend this further by introducing concept of dictionary in python. 1. Dictionary Dictionary in python can be use to input from one source and itself acts as a source for processing … Continue reading [Part 5] Python3: Basics for Beginners – Dictionary & Modules
[Part 4] Python3: Basics for Beginners – Type of Loops
In Part 3, we read about simple and advanced If/Else function. In this blog, we will read about usage of loops in python. 1. While Loop Till now, our program was exiting moment it displays result after code execution. However, we may need our application to continuosly re-run python function without explicity exiting. This can … Continue reading [Part 4] Python3: Basics for Beginners – Type of Loops
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