KAN-229 Add container about print podname (#113)

common_k8s_manifests/print_podname/.dockerignore

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+# Ignore Python cache and virtual environment folders
+__pycache__/
+*.pyc
+*.pyo
+venv/
+Makefile
+manifests/
+README.md
+imgs/

common_k8s_manifests/print_podname/Dockerfile

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+FROM python:3.12.7-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY ./src /app
+
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]

common_k8s_manifests/print_podname/Makefile

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+IMAGE_NAME=choisunguk/print-podname
+IMAGE_TAG=python-rc1.2
+
+create-builder:
+	docker buildx create --name mybuilder --use
+
+build-push:
+	docker buildx build --platform linux/amd64,linux/arm64 -t $(IMAGE_NAME):${IMAGE_TAG} --push .
+
+.PHONY: create-builder build-push

common_k8s_manifests/print_podname/README.md

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+# 개요
+* pod name을 조회하는 API
+* python FasteAPI로 개발됨
+
+# 배포 방법
+
+```sh
+kubectl apply -f ./manifests/
+```
+
+# 호출 예제
+
+```sh
+$ curl print-podname.default.svc.cluster.local; echo
+{"pod_name":"print-podname-576985bbff-pvtsb"}netshoot-597b97c87f-9wlt6
+```

common_k8s_manifests/print_podname/manifests/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: print-podname
+  namespace: default
+spec:
+  replicas: 5
+  selector:
+    matchLabels:
+      app: print-podname
+  template:
+    metadata:
+      labels:
+        app: print-podname
+    spec:
+      containers:
+      - name: print-podname
+        image: choisunguk/print-podname:python-rc1.2
+        env:
+        - name: POD_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.name
+        resources:
+          limits:
+            memory: "64Mi"
+            cpu: "50m"
+        ports:
+        - containerPort: 8000
+      topologySpreadConstraints:
+      - maxSkew: 1
+        topologyKey: topology.kubernetes.io/zone
+        whenUnsatisfiable: DoNotSchedule
+        labelSelector:
+          matchLabels:
+            app: print-podname

common_k8s_manifests/print_podname/manifests/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: print-podname
+spec:
+  selector:
+    app: print-podname
+  ports:
+  - port: 80
+    targetPort: 8000

common_k8s_manifests/print_podname/requirements.txt

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+annotated-types==0.6.0
+anyio==4.3.0
+certifi==2024.2.2
+click==8.1.7
+dnspython==2.6.1
+email_validator==2.1.1
+fastapi==0.110.3
+h11==0.14.0
+httpcore==1.0.5
+httptools==0.6.1
+httpx==0.27.0
+idna==3.7
+itsdangerous==2.2.0
+Jinja2==3.1.3
+MarkupSafe==2.1.5
+orjson==3.10.2
+pydantic==2.7.1
+pydantic-extra-types==2.7.0
+pydantic-settings==2.2.1
+pydantic_core==2.18.2
+python-dotenv==1.0.1
+python-multipart==0.0.9
+PyYAML==6.0.1
+sniffio==1.3.1
+starlette==0.37.2
+typing_extensions==4.11.0
+ujson==5.9.0
+uvicorn==0.29.0
+uvloop==0.19.0
+watchfiles==0.21.0
+websockets==12.0

common_k8s_manifests/print_podname/src/main.py

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+from fastapi import FastAPI
+import os
+from fastapi.responses import JSONResponse
+
+app = FastAPI()
+
+@app.get("/")
+def print_podname():
+  pod_name = os.getenv("POD_NAME", "unknown")
+  return JSONResponse(content={"pod_name": pod_name})