Others on Samarthya

Specialist in the Emotional Memory #EQ

Thu, 03 Nov 2022 12:00:00 +0000

The unconscious opinions are the emotional memories, I just loved this statement.

Event Streaming

Thu, 20 Jan 2022 08:06:56 +0000

While reading Apache Kafka it was interesting analogy that they described

Event streaming is the digital equivalent of the human body’s central nervous system. — Apache Kafka

It draws a great parallel between how the central nervous system allows for real time event generations and consumption in terms of reflex actions. The examples are well explained and captured here.

Museum & Infantry

Fri, 07 Jan 2022 05:45:49 +0000

SAFe for Lean enterprises

Mon, 01 Mar 2021 16:14:46 +0000

SAFe is a framework; one of the leading, for business agility that allows an organization to adapt based on its own business needs. It mixes the best of Agile, Lean, DevOps into an exhaustive system of guidelines to deliver quality, innovative products in a more predictive manner.

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

सोऽहमस्मि

Mon, 10 Feb 2020 12:00:00 +0000

Life is a mystery, and autism just makes it special

soham – I am him.
#

Pangram

Thu, 30 Jan 2020 15:59:51 +0000

I wrote my first program for Pangram in JS here and attempted few variations to optimize the readability and execution time. This time the code challenge was in Golang and it was satisfying attempt to do in first try.

Nil Interface

Sun, 26 Jan 2020 12:00:00 +0000

An interface in Golang is a set of methods and a type.

What is the purpose of Nil interface in GO-lang

A nil interface value holds neither value nor concrete type.

Metric Beat

Fri, 24 Jan 2020 12:00:00 +0000

All right, its been a busy week and finally some time at hand to write about something I have been doing.

Mostly I am working on ELK stack these days, securing, validating, data analytics etc. Today, had the opportunity to go the Secure Elastic way, by enabling the TLS for secure communication within Nodes (Elastic cluster) and finally setup a Metric beat to get the status of the node.

Securing Elastic

Thu, 23 Jan 2020 12:00:00 +0000

Security is integral to every and all the tasks in a shared environment. In ELK if you have setup a cluster which is accessible to all; anyone can make modifications which may or may not impact the other users.

House that Jack built.

Fri, 17 Jan 2020 12:00:00 +0000

Funny thing about simple programs is that there are too many optimization options available that never lets you feel content.

So here I am trying to solve another problem from exercism.io which is totally a must visit for anyone who wants to learn and practice.

Security Analytics

Mon, 13 Jan 2020 00:00:00 +0000

* Header image from Elastic.co

As we move towards the micro-service/container economy where there are heaps of products available in form of applications to be downloaded & installed on primarily two platforms Android and IOS, we just cant underline the security implications enough.

Maths problem in JS

Fri, 10 Jan 2020 12:00:00 +0000

Objective
#

Solve a simple math problem.

Parse and evaluate simple math word problems returning the answer as an integer.

Concurrency

Fri, 03 Jan 2020 12:00:00 +0000

Concurrency and Parallelism – (Helpful link)
#

Last few weeks have been interesting, a new year just embarked, my learning pace slowed down; comparatively due to the festivities and obligations around, but I am still trying to maintain.

JS Reduce and forEach

Sun, 15 Dec 2019 12:00:00 +0000

I have been polishing my Go and JS skills recently and today learned about how to use the reduce() and forEach() method. The problem I was trying to solve was return columns and rows from an input string.

Optimizing in JS

Fri, 13 Dec 2019 12:00:00 +0000

You never stop learning is not just a phrase, it is something I live everyday. Today, I was just trying out my skills with JS and was solving an innocuous problem, in JS.

MySQL/MariaDB on MAC

Fri, 01 Nov 2019 12:00:00 +0000

Challenges are plenty but outcome is always one – Learning!

While trying to troubleshoot an inhouse application I had to setup a quick MySQL instance which led me to install my first instance of MariaDB on my local MAC machine.

KubeLab

Thu, 10 Oct 2019 00:00:00 +0000

Kubernetes

cloud_user@ip-10-0-1-101:~$ kubectl version
Client Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.3", GitCommit:"721bfa751924da8d1680787490c54b9179b1fed0", GitTreeState:"clean", BuildDate:"2019-02-01T20:08:12Z", GoVersion:"go1.11.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"13", GitVersion:"v1.13.11", GitCommit:"25074a190ef2a07d8b0ed38734f2cb373edfb868", GitTreeState:"clean", BuildDate:"2019-09-18T14:34:46Z", GoVersion:"go1.11.13", Compiler:"gc", Platform:"linux/amd64"}

cloud_user@ip-10-0-1-101:~$ kubectl api-resources
NAME SHORTNAMES APIGROUP NAMESPACED KIND
bindings true Binding
componentstatuses cs false ComponentStatus
configmaps cm true ConfigMap
endpoints ep true Endpoints
events ev true Event
limitranges limits true LimitRange
namespaces ns false Namespace
nodes no false Node
persistentvolumeclaims pvc true PersistentVolumeClaim
persistentvolumes pv false PersistentVolume
pods po true Pod
podtemplates true PodTemplate
replicationcontrollers rc true ReplicationController
resourcequotas quota true ResourceQuota
secrets true Secret
serviceaccounts sa true ServiceAccount
services svc true Service
mutatingwebhookconfigurations admissionregistration.k8s.io false MutatingWebhookConfiguration
validatingwebhookconfigurations admissionregistration.k8s.io false ValidatingWebhookConfiguration
customresourcedefinitions crd,crds apiextensions.k8s.io false CustomResourceDefinition
apiservices apiregistration.k8s.io false APIService
controllerrevisions apps true ControllerRevision
daemonsets ds apps true DaemonSet
deployments deploy apps true Deployment
replicasets rs apps true ReplicaSet
statefulsets sts apps true StatefulSet
tokenreviews authentication.k8s.io false TokenReview
localsubjectaccessreviews authorization.k8s.io true LocalSubjectAccessReview
selfsubjectaccessreviews authorization.k8s.io false SelfSubjectAccessReview
selfsubjectrulesreviews authorization.k8s.io false SelfSubjectRulesReview
subjectaccessreviews authorization.k8s.io false SubjectAccessReview
horizontalpodautoscalers hpa autoscaling true HorizontalPodAutoscaler
cronjobs cj batch true CronJob
jobs batch true Job
certificatesigningrequests csr certificates.k8s.io false CertificateSigningRequest
leases coordination.k8s.io true Lease
events ev events.k8s.io true Event
daemonsets ds extensions true DaemonSet
deployments deploy extensions true Deployment
ingresses ing extensions true Ingress
networkpolicies netpol extensions true NetworkPolicy
podsecuritypolicies psp extensions false PodSecurityPolicy
replicasets rs extensions true ReplicaSet
networkpolicies netpol networking.k8s.io true NetworkPolicy
poddisruptionbudgets pdb policy true PodDisruptionBudget
podsecuritypolicies psp policy false PodSecurityPolicy
clusterrolebindings rbac.authorization.k8s.io false ClusterRoleBinding
clusterroles rbac.authorization.k8s.io false ClusterRole
rolebindings rbac.authorization.k8s.io true RoleBinding
roles rbac.authorization.k8s.io true Role
priorityclasses pc scheduling.k8s.io false PriorityClass
storageclasses sc storage.k8s.io false StorageClass
volumeattachments storage.k8s.io false VolumeAttachment

cloud_user@ip-10-0-1-101:~$ kubectl get cm
NAME DATA AGE
fruit-service-ambassador-config 1 5m49s

Basic Commands (Beginner):
 create Create a resource from a file or from stdin.
 expose Take a replication controller, service, deployment or pod and expose it as a new Kubernetes Service
 run Run a particular image on the cluster
 set Set specific features on objects

Basic Commands (Intermediate):
 explain Documentation of resources
 get Display one or many resources
 edit Edit a resource on the server
 delete Delete resources by filenames, stdin, resources and names, or by resources and label selector

Deploy Commands:
 rollout Manage the rollout of a resource
 scale Set a new size for a Deployment, ReplicaSet, Replication Controller, or Job
 autoscale Auto-scale a Deployment, ReplicaSet, or ReplicationController

Cluster Management Commands:
 certificate Modify certificate resources.
 cluster-info Display cluster info
 top Display Resource (CPU/Memory/Storage) usage.
 cordon Mark node as unschedulable
 uncordon Mark node as schedulable
 drain Drain node in preparation for maintenance
 taint Update the taints on one or more nodes

Troubleshooting and Debugging Commands:
 describe Show details of a specific resource or group of resources
 logs Print the logs for a container in a pod
 attach Attach to a running container
 exec Execute a command in a container
 port-forward Forward one or more local ports to a pod
 proxy Run a proxy to the Kubernetes API server
 cp Copy files and directories to and from containers.
 auth Inspect authorization

Advanced Commands:
 diff Diff live version against would-be applied version
 apply Apply a configuration to a resource by filename or stdin
 patch Update field(s) of a resource using strategic merge patch
 replace Replace a resource by filename or stdin
 wait Experimental: Wait for a specific condition on one or many resources.
 convert Convert config files between different API versions

Settings Commands:
 label Update the labels on a resource
 annotate Update the annotations on a resource
 completion Output shell completion code for the specified shell (bash or zsh)

Other Commands:
 api-resources Print the supported API resources on the server
 api-versions Print the supported API versions on the server, in the form of "group/version"
 config Modify kubeconfig files
 plugin Provides utilities for interacting with plugins.
 version Print the client and server version information

Usage:
 kubectl [flags] [options]

Spring Data-LDAP

Wed, 24 Apr 2019 12:00:00 +0000

I have a small problem at hand which girdles around learning Angular, with a Spring enabled Rest endpoints which uses a DB to store data and have security layer in between that should interact with a LDAP for authentication and authorization and finally the application should run as one smooth unit. It will be too much to cover in single blog so I will be writing multiple blogs in continuation to this one.

Spring Data-Ldap: Part 2

Wed, 24 Apr 2019 12:00:00 +0000

Now since we have plugged in the LDAP information it is time now to stitch it with Spring Security and the easiest thing to do is

@Configuration @EnableWebSecurity(debug = true) public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

Locale

Fri, 05 Apr 2019 12:00:00 +0000

Did you ever see a warning printed on your console the moment you log into your Linux machine and did that warning ever complaned to you about the benign locale?

CSS and HTML to dom.

Fri, 08 Mar 2019 12:00:00 +0000

Happiness is not always straight lines.

Having worked on different technologies I never took HTML very seriously till a couple of years back. I started programming rather seriously programming when I was about 20 years old for a small startup then – FQSL. In those days, my primary responsibility was more around creating a middle – tier application which had a management interface and had the ability to spawn multiple threads to handle the incoming traffic and the main concern was to handle the load effectively and perform under pressure. This was all to be done in a native platform “Windows” and mostly in VC++ and MFC. Glad we are in serverless days now. 🙂

Vue - Lesson 2

Fri, 01 Mar 2019 00:00:00 +0000

Zero configuration

CLI command line interface

Create things rapidly

select libraries you want to use

Optimize the loading speed

CHoose your own adventure

Starting from a blank state

organizing the structure.

Creating your app with VUEJS

Thu, 28 Feb 2019 12:00:00 +0000

This is my attempt at learning a new framework and using it to create my own webapp uing vueJS.

Vue is a progressive and reactive framework for building user interfaces.

Learning Step - 1

Wed, 27 Feb 2019 00:00:00 +0000

The best way to learn a technology is to create something from scratch and as my ever wandering brain hops from one framework to another I am starting out on a new conquest of learning something that professionally I have never tried. Not just a scripting technology but learning the new enabler platforms as well.

Serverless patterns

Tue, 26 Feb 2019 12:00:00 +0000

Why do I need them?
#

Usually they are cost savers and beneficial for situations that are not bounded by the precise profitable point in time. What I mean to say is considering you are in to a startup and want to avoid the upfront infra cost that you may need if you want to setup a VM. You can better go for a serverless service. These services can be

Saturday morning

Sun, 24 Feb 2019 12:00:00 +0000

Morning was not early today, had a good night sleep and woke up at around 9:00 to a door bell. My devil close to my side and full of energy just stretching his tools of destruction.

Manager’s dilemma

Fri, 22 Feb 2019 12:00:00 +0000

Do not handle adults with kids gloves

Some of the gems I hear everyday and the benefits are exceptional.

You need to be direct and do not gloss the message.
You know the organization is going to back you.
The other person also gets the opportunity to demonstrate the maturity he/she possesses.