TILs - Fueling Curiosity, One Insight at a Time

At Codemancers, we believe every day is an opportunity to grow. This section is where our team shares bite-sized discoveries, technical breakthroughs and fascinating nuggets of wisdom we've stumbled upon in our work.

Published
Author
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Soniya Rayabagi
git switch -c branch_name used in Git to create and switch to a new branch in one step.
#gitcommand
Published
Author
user-image
Soniya Rayabagi
The helm search hub <keyword> command is used to search for charts available in the Helm Hub, which is a centralized repository of Helm charts , keyword can be prometheus, grafana, nginx, postgresql etc.
helm search hub <keyword> --max-col-width=0 this command displays the results without column width limitations.
#devops #helm #helmhub #kubernetes
Published
Author
user-image
Soniya Rayabagi
Empty a file using the > symbol. Simply typing > filename truncates the file, removing all its previous content.
#UnixCommand
Published
Author
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Soniya Rayabagi
chmod 777 is a command used to set permissions on a file or directory in Unix-like operating systems (including Linux and macOS). It grants full read, write, and execute permissions.
#devops #FilePermissions
Published
Author
user-image
Soniya Rayabagi
Kubernetes on Docker Desktop
• Install Docker Desktop
• Enable Kubernetes from docker-desktop setting
• Switch the Kubernetes context to docker-desktop
• Example :

Code

❯ kubectl config get-contexts
CURRENT   NAME                      CLUSTER                   AUTHINFO                  NAMESPACE
          docker-desktop            docker-desktop            docker-desktop
*         kind-kube-nginx-cluster   kind-kube-nginx-cluster   kind-kube-nginx-cluster

❯ kubectl config use-context docker-desktop
Switched to context "docker-desktop".


• Instead of using the command kubectl config use-context docker-desktop we can also go with kubectx to switch between Kubernetes context
• To install kubectx on Mac: brew install kubectx
#devops #kubernetes #dockerdesktop
Published
Author
user-image
Nisanth
Access Kubernetes dashboard on minikube
To access the dashboard:
minikube dashboard
This will enable the dashboard add-on, and open the proxy in the default web browser.
#devops #kubernetes
Published
Author
user-image
Soniya Rayabagi
Today I learnt , REST API endpoints for organization members
• It will List all users who are members of an organization. If the authenticated user is also a member of this organization then both concealed and public members will be returned.
• The token must have the following permission set: members:read
• Request example:

Code

curl -L \
  -H "Accept: application/vnd.github+json" \
  -H "Authorization: Bearer " \
  -H "X-GitHub-Api-Version: 2022-11-28" \
  https://api.github.com/orgs/ORG/members


Response

Code

[
  {
    "login": "octocat",
    "id": 1,
    "node_id": "MDQ6VXNlcjE=",
    "avatar_url": "https://github.com/images/error/octocat_happy.gif",
    "gravatar_id": "",
    "url": "https://api.github.com/users/octocat",
    "html_url": "https://github.com/octocat",
    "followers_url": "https://api.github.com/users/octocat/followers",
    "following_url": "https://api.github.com/users/octocat/following{/other_user}",
    "gists_url": "https://api.github.com/users/octocat/gists{/gist_id}",
    "starred_url": "https://api.github.com/users/octocat/starred{/owner}{/repo}",
    "subscriptions_url": "https://api.github.com/users/octocat/subscriptions",
    "organizations_url": "https://api.github.com/users/octocat/orgs",
    "repos_url": "https://api.github.com/users/octocat/repos",
    "events_url": "https://api.github.com/users/octocat/events{/privacy}",
    "received_events_url": "https://api.github.com/users/octocat/received_events",
    "type": "User",
    "site_admin": false
  }
]


#githubactionspublic #rest api
Published
Author
user-image
Mahesh Bhosle
DevOps Engineer
We can leverage the AWS Systems Manager service to execute the Ansible scripts on the EC2 hosts, this removes the overhead of maintaining SSH keys and other instance details.
How it is done:
• Prerequisites:
◦ EC2 instance should have an IAM role attached for SSM
◦ Ansible should be installed on the instance
• In the AWS System Manager go to State Manager and create a new association
• The association details will include: association name, Document, Ansible playbook, Target selection, schedule, and Rate control
• Based on the Association configuration, the playbook will be executed.
#automation #awsssm #ansible
Published
Author
user-image
Nisanth
Securing Sensitive Data in Kubernetes with Base64 Encoding
Today I learned that the base64 command can be used in Kubernetes to encode sensitive data such as passwords and API keys when creating secrets. By encoding the sensitive information in base64 format, it can be safely stored in Kubernetes secrets without exposing it in plaintext. This adds an additional layer of security to the sensitive data used by applications running in Kubernetes clusters. echo -n "some_password" | base64
#devops #kubernetes #encoding
Published
Author
user-image
Satya
while doing npm install or yarn install we might run into this error mentioned below:


Code

error /Users//project/node_modules/sharp: Command failed.
Exit code: 127
Command: (node install/libvips && node install/dll-copy && prebuild-install) || (node install/can-compile && node-gyp rebuild && node install/dll-copy)


to fix this just do npm rebuild & then run npm install or yarn install .
#sharp-error #npm #node

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