https://github.com/rjshrjndrn/kube_dev

https://github.com/rjshrjndrn/kube_dev

Last synced: 13 days ago
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• Host: GitHub
• URL: https://github.com/rjshrjndrn/kube_dev
• Owner: rjshrjndrn
• Created: 2019-10-16T18:58:47.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2020-01-09T10:18:33.000Z (almost 5 years ago)
• Last Synced: 2023-08-19T10:53:45.376Z (about 1 year ago)
• Language: Go
• Homepage:
• Size: 15.6 KB
• Stars: 2
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: Readme.md

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README

        
## Commands

1. build docker image

    ` docker build -f Dockerfile /: .`

2. Run a image

    `docker run `

    

## Creating a local kube cluster

Prerequisites:  

    1. [Docker](https://docs.docker.com/install/linux/docker-ce/ubuntu/)  

    2. Installing k3d to create cluster  

    `sudo curl -SsL https://github.com/rancher/k3d/releases/download/v1.3.4/k3d-linux-amd64 --output /usr/local/bin/k3d ; sudo chmod +x /usr/local/bin/k3d`  

    3. Creating kubernetes cluster  

    `k3d create --server-arg --no-deploy --server-arg traefik --name demo --image rancher/k3s:v0.9.0`

    

## Shutting down gracefully

1. Handle sigterm

    1. rjshrjndrn/demo:nosigterm

    2. rjshrjndrn/demo:sigterm

2. Liveness Probe

3. readines probe

4. grace kill time

## livenessProbe

```

readinessProbe:

      httpGet:

        path: /start/healthz

        port: 8080

        httpHeaders:

        - name: Custom-Header

          value: Awesome

      initialDelaySeconds: 3

      periodSeconds: 3

```

## livenessProbe

```

livenessProbe:

      httpGet:

        path: /healthz

        port: 8080

        httpHeaders:

        - name: Custom-Header

          value: Awesome

      initialDelaySeconds: 3

      periodSeconds: 3

```

## How a pod get terminated

1. A SIGTERM signal is sent to the main process (PID 1) in each container, and a “grace period” countdown starts (defaults to 30 seconds - see below to change it).

2. Upon the receival of the SIGTERM, each container should start a graceful shutdown of the running application and exit.

3. If a container doesn’t terminate within the grace period, a SIGKILL signal will be sent and the container violently terminated.

## Termination grace period

```

terminationGracePeriodSeconds: 60

```