https://github.com/dee-me-tree-or-love/kubernetes-sandbox
Different educational projects with K8S 🪄
https://github.com/dee-me-tree-or-love/kubernetes-sandbox
kubernetes microservices node-js python
Last synced: 3 months ago
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Different educational projects with K8S 🪄
- Host: GitHub
- URL: https://github.com/dee-me-tree-or-love/kubernetes-sandbox
- Owner: dee-me-tree-or-love
- Created: 2019-03-06T14:57:58.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2019-03-26T10:22:24.000Z (about 6 years ago)
- Last Synced: 2025-02-01T07:18:50.111Z (5 months ago)
- Topics: kubernetes, microservices, node-js, python
- Language: Python
- Homepage:
- Size: 43.9 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
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README
# Kubernetes Sandbox
Simple system to experiment with Kubernetes, Skaffold and friends
## Components
### Lotr-Quotes
Is a simple Node.js Express service giving a random quote out of 50 "Lord Of The Rings" quotes.
Runs on port `8080`.
| route | purpose |
| --- | --- |
| GET: /quote | returns `JSON: {quote, author}` |
| GET: /ready | returns `JSON: {ready}` to indicate if ready to serve |
### Python-Starter
Is a simple Python Flask service checking if the other service is ready (and pretends to be starting it).
Runs on port `5000`.
| route | purpose |
| --- | --- |
| GET: / | returns `TEXT: ` |
### Message-Writer
Is a simple Python Flask service that publishes the received messages to the `rabbitmq` service.
| route | purpose |
| --- | --- |
| POST: /publish | for JSON input: `'{"": ""}'` publishes the content to the queue of topic `` |
### Food-Message-Worker
A listening process that waits for the incoming messages from the `rabbitmq` queue with `food` topic.
Is not a service, but a running pod. Replicated to `5 (maybe different number)` instances.
### Food-Job-Worker
Is a `Job` container performing some action on the supplied `food` job.
Expects the job suppied as an environment variable `MY_JOB_ITEM`.
| env_key | value | operation |
| --- | --- | --- |
| `MY_JOB_ITEM` | `string: ` | simply reverses the supplied item and writes the result to the console. |
## Infrastructure
### Skaffold
> _Disclaimer: use `Skaffold v0.23.0` while `sync` issues are not solved_.
The definition for the Skaffold project is described in `skaffold.yaml`.
It uses the `file-sync` option to update container code without rebuilding.
Important to notice, that for the `sync` option the mapping should correspond to the `WORKDIR` of the associated `DockerFile`
```
# in skaffold.yaml
...
build:
artifacts:
- image: gcr.io/k8s-skaffold/lotr-quotes
context: ./lotr-quotes/
sync:
'**/*.js': /usr/src/app
...
# ~~
# in ./lotr-quotes/Dockerfile
...
WORKDIR /usr/src/app
...
```
### Rabbitmq
The deployment of a [`rabbitmq`](https://www.rabbitmq.com/) service is described in `./insfrastructure/rabbitmq/k8s/deployment.yaml`.