컨테이너 기술 실습
마지막 업데이트
마지막 업데이트
mkdir -p /tmp/container-lab && cd /tmp/container-lab
cat > index.html << 'EOF'
<!DOCTYPE html>
<html><body>
<h1>Hello from Container!</h1>
<p>Hostname: <!--#echo var="HOSTNAME" --></p>
</body></html>
EOF
cat > nginx.conf << 'EOF'
server {
listen 80;
location / {
root /usr/share/nginx/html;
ssi on;
}
}
EOFcat > Dockerfile << 'EOF'
FROM nginx:alpine
COPY nginx.conf /etc/nginx/conf.d/default.conf
COPY index.html /usr/share/nginx/html/
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]
EOFdocker build -t my-web:v1 .
docker images my-webREPOSITORY TAG IMAGE ID CREATED SIZE
my-web v1 abc123def456 5 seconds ago ~40MBdocker images my-web:v1 --format "{{.Repository}}:{{.Tag}} - {{.Size}}"docker run -d --name my-web-container -p 8080:80 my-web:v1
docker pscurl http://localhost:8080# 실행 중인 컨테이너에 shell 접속
docker exec -it my-web-container sh
# 컨테이너 내부에서 실행
ls /usr/share/nginx/html/
cat /etc/nginx/conf.d/default.conf
exitdocker logs my-web-container
docker logs --tail 5 my-web-container# HTTP 응답 코드 확인
HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:8080)
[ "$HTTP_CODE" = "200" ] && echo "성공! HTTP $HTTP_CODE" || echo "실패: HTTP $HTTP_CODE"cat > main.go << 'EOF'
package main
import (
"fmt"
"net/http"
"os"
)
func main() {
hostname, _ := os.Hostname()
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello from %s!\n", hostname)
})
fmt.Println("Server starting on :8080")
http.ListenAndServe(":8080", nil)
}
EOFcat > Dockerfile.multi << 'EOF'
# Stage 1: 빌드
FROM golang:1.21-alpine AS builder
WORKDIR /app
COPY main.go .
RUN go build -o server main.go
# Stage 2: 실행 (최소 이미지)
FROM alpine:3.19
COPY --from=builder /app/server /server
EXPOSE 8080
CMD ["/server"]
EOF
docker build -f Dockerfile.multi -t my-go-app:v1 .docker images | grep -E "my-web|my-go-app|golang"echo "Go 앱 이미지 크기:"
docker images my-go-app:v1 --format "{{.Size}}"docker stop my-web-container 2>/dev/null
docker rm my-web-container 2>/dev/null
docker rmi my-web:v1 my-go-app:v1 2>/dev/null
rm -rf /tmp/container-lab