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https://github.com/AnjaneyuluBatta505/kubernetes_django
Deploying django application on kubernetes
https://github.com/AnjaneyuluBatta505/kubernetes_django
celery django dockerfile kubernetes kubernetes-deployment kubernetes-service redis
Last synced: 3 months ago
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Deploying django application on kubernetes
- Host: GitHub
- URL: https://github.com/AnjaneyuluBatta505/kubernetes_django
- Owner: AnjaneyuluBatta505
- License: mit
- Created: 2019-12-22T13:38:45.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2023-03-31T14:36:24.000Z (over 1 year ago)
- Last Synced: 2024-07-27T18:54:25.680Z (4 months ago)
- Topics: celery, django, dockerfile, kubernetes, kubernetes-deployment, kubernetes-service, redis
- Language: Python
- Size: 26.4 KB
- Stars: 27
- Watchers: 2
- Forks: 12
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Django application deployment in kubernetes
To get started with kubernetes in local environment use Microk8s. Go through the microk8s setup documentation and setup it.
## Adding alias to "microk8s.kubectl" to "k8s"
Open `~/.bashrc` and below line at the end of the file.
```bash
alias k8s="microk8s.kubectl"
```
## Now, clone this repo using below commands
```
git clone [email protected]:AnjaneyuluBatta505/kubernetes_django.git
```
## Let's start the deployment of the django application and other apps like redis, postgres, flower, etc.
### Setting up postgres service
In the postgres we have 4 `yaml` configuration files.
1. secrets.yaml - Useful when using secret env vaibles in the apps
2. volume.yaml - Persistent Volume for Postgres database
3. volume_claim.yaml - This claim lets our deployment application store its data in an external location, so that if one of the application’s containers fails, it can be replaced with a new container and continue accessing its data stored externally, as though an outage never occurred.
4. deployment.yaml - Deployment to start the application containers
5. service.yaml - Allows other apps to comminicate with it's related deployment(i.e pods/containers)
Now, create above objects in kubernetes using below commands
```
k8s apply -f kubernetes/postgres/secrets.yaml
k8s apply -f kubernetes/postgres/volume.yaml
k8s apply -f kubernetes/postgres/volume_claim.yaml
k8s apply -f kubernetes/postgres/deployment.yaml
k8s apply -f kubernetes/postgres/service.yaml
```
We have successfully created the postgres service in k8s(i.e kubernetes cluster).
### Setting up redis service
In the redis we have 2 `yaml` configuration files.
To setup the redis service in k8s execute the below commands
```
k8s apply -f kubernetes/redis/deployment.yaml
k8s apply -f kubernetes/redis/service.yaml
```
### Setting up django app
In django app we have 3 `yaml` configuration files.
To setup the django app in k8s execute the below commands
```
k8s apply -f kubernetes/django/job-migration.yaml
k8s apply -f kubernetes/django/deployment.yaml
k8s apply -f kubernetes/django/service.yaml
```
### Setting up celery app
In celery app we have 2 `yaml` configuration files.
To setup the django app in k8s execute the below commands
```
k8s apply -f kubernetes/celery/beat-deployment.yaml
k8s apply -f kubernetes/celery/worker-deployment.yaml
```
### Setting up flower app
In flower app we have 2 `yaml` configuration files.
To setup the django app in k8s execute the below commands
```
k8s apply -f kubernetes/flower/deployment.yaml
k8s apply -f kubernetes/flower/service.yaml
```
## How to debug the pods for errors if any failures occurs ?
```
$ k8s get po
NAME READY STATUS RESTARTS AGE
celery-beat-75b5f954-m2pzj 1/1 Running 0 64m
celery-worker-56fc7b88f5-shd87 1/1 Running 0 61m
django-688f76f576-kt4h6 1/1 Error 0 60m
django-migrations-mhng7 0/1 Completed 0 59m
flower-77bf99c799-9drnp 1/1 Running 87 20h
postgres-76dc76ffbb-hzmdc 1/1 Running 2 23h
redis-76f6f4857b-srxlw 1/1 Running 1 20h
```
We can debug the pod failure using command `k8s logs `.
Sometimes `k8s describe `
## To access the django app in our local browser
```
$ k8s get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
django-service NodePort 10.152.183.146 8000:32693/TCP 21h
flower-service NodePort 10.152.183.170 5555:30675/TCP 21h
kubernetes ClusterIP 10.152.183.1 443/TCP 25h
postgres-service ClusterIP 10.152.183.151 5432/TCP 24h
redis-service ClusterIP 10.152.183.89 6379/TCP 21h
```
Visit url "10.152.183.146:8000" (i.e `CLUSTER-IP:PORT`). It's just for testing.
## References:
1. https://microk8s.io/docs/
2. https://kubernetes.io/docs/home/
3. https://medium.com/edureka/what-is-kubernetes-container-orchestration-tool-d972741550f6