Docker on Samarthya

Failed to connect to bus: No medium found

Wed, 11 Sep 2024 12:00:00 +0000

If you have ever seen this error, you know the pain of a fellow linux user.

Failed to connect to bus: No medium found

This is message I get when I was trying to install podman.socket

Containers: A brief take

Fri, 17 May 2024 12:00:00 +0000

The story of Linux containers is a tale of innovation and collaboration, with roots surprisingly deep in the history of the Linux operating system itself.

Non root `podman` and `molecule`

Tue, 13 Feb 2024 12:00:00 +0000

Recreated in October 2026 from the post; the original image was lost

On my Centos8 I was facing issue when I was trying to run Molecule on a centos machine which is running podman as a non root user. Also, I am using the driver – docker and not podman, so to overcome the aliases and references issues I have installed podman-docker.

Buildah: https://buildah.io/

Tue, 07 Mar 2023 12:00:00 +0000

Buildah is a command-line tool used for building and managing OCI-compliant images. It is an alternative to Docker Build that provides greater flexibility and control over the image building process.

Podman Machine: How & Why?

Tue, 07 Mar 2023 12:00:00 +0000

Recreated in October 2026 from the post; the original image was lost

Podman

Vagrant-OSX

Fri, 19 Aug 2022 12:00:00 +0000

In the previous blog, I was left with the error that had little information for me to debug. I realized since I migrated most of the files from my previous laptop it might be causing an issue.

Vagrant OSX

Thu, 18 Aug 2022 12:00:00 +0000

Having just bought an M1 – MacBook Pro the issue are mounting. The premier challenge was to get my Vagrant boxes configured with provider virtualbox to run.

Since VirtualBox clearly calls it out “no support”

ServiceAccount

Wed, 16 Feb 2022 12:00:00 +0000

If you have seen errors like these when deploying using a serviceAccount

Error: INSTALLATION FAILED: rendered manifests contain a resource that already exists. Unable to continue with install: could not get information about the resource ConfigMap "spinnaker-hellow-pipline" in namespace "spinnaker": configmaps "spinnaker-hellow-pipline" is forbidden: User "system:serviceaccount:jenkins:default" cannot get resource "configmaps" in API group "" in the namespace "spinnaker"

What?
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A service account provides an identity for processes that run in a Pod.
Every namespace has a default service account
When you create a pod, if you do not specify a service account, it is automatically assigned the default service account in the same namespace.
To use a non-default service account, set the spec.serviceAccountName field of a pod to the name of the service account you wish to use.
The service account has to exist at the time the pod is created, or it will be rejected.
The service account of an already created pod cannot be updated

Default RBAC policies grant scoped permissions to control-plane components, nodes, and controllers, but grant no permissions to service accounts outside the kube-system namespace (beyond discovery permissions given to all authenticated users). — Official documentation

Example
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apiVersion: v1
kind: ServiceAccount
metadata:
 creationTimestamp: "2021-08-27T07:52:20Z"
 name: default
 namespace: default
 resourceVersion: "XXXX"
 uid: XXXX
secrets:
- name: default-token-vcb75

Let’s add docker-registry secret to the SA. (My secret name is samarthya-docker)

`Devspace`: Managing Apps in Kubernetes

Tue, 15 Feb 2022 12:00:00 +0000

What is `devspace`?
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devspace is a CLI tool for kubernetes, which can help you configure, deploy, debug. and test your application inside Kubernetes.

Kaniko: Jenkins Pipeline

Fri, 11 Feb 2022 12:00:00 +0000

So there are many things I have been simultaneously trying to learn & one of those is to learn how you can configure a pipeline

Objectives
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Learn Jenkins deployment on Kubernetes
Learn Jenkins Kubernetes Plugin
Learn Jenkins Pipeline (Declarative)
How to build and deploy images in Kubernetes cluster

All right, with so many monkeys on my back I had to do things the way I know it works for me.

Spinnaker: Open Source Deployment

Sat, 05 Feb 2022 12:00:00 +0000

I have written a series of blogs to capture how you can deploy spinnaker on a Kubernetes cluster & manage a helm chart deployment via pipeline.

The only way to enable more frequent changes is to invest in supporting people with better tooling, practices, and culture

From the Book Spinnaker

Spinnaker: docker-registry

Fri, 04 Feb 2022 12:00:00 +0000

You will need a valid docker registry before you add any trigger in the pipeline in Spinnaker

Official documentation is a good resource to seek more clarifications — Spinnaker

In my case I have already added an account my-docker-registry as under (The final result after you successfully configure Docker.

Docker: Clean in Bulk

Mon, 27 Dec 2021 12:00:00 +0000

I will define the problem I was facing

Too many snapshots versions for the same image were there on my system

Freaky developer

So to delete there was one hard hack way of cleaning it all

Docker network

Tue, 04 Aug 2020 12:10:49 +0000

Learn by example
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In this blog let’s learn how to create a bridge network. By definition - Bridge networks are usually used when your applications run in standalone containers that need to communicate

Dockerfile

Wed, 15 Jul 2020 12:00:00 +0000

docker build builds a docker image by reading instructions (directives) from a text file called Dockerfile

The build is run by the Docker daemon, not by the CLI

Hello World!
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I would move in stages, like a good learning guide always recommends.

Docker

Sat, 11 Jul 2020 12:00:00 +0000

Usually I use Centos, but this time I wanted to try out docker swarm and ubuntu was the preferred option due to the options and supporting blogs available.

Do read – https://docs.docker.com/get-started/#containers-and-virtual-machines

docker.com