devops-infrastructure

1# DevOps & Infrastructure
2 
3### When to Load
4 
5- **Trigger**: Docker, CI/CD pipelines, deployment configuration, monitoring, infrastructure as code
6- **Skip**: Application logic only with no infrastructure or deployment concerns
7 
8## DevOps Workflow
9 
10Copy this checklist and track progress:
11 
12```
13DevOps Setup Progress:
14- [ ] Step 1: Containerize application (Dockerfile)
15- [ ] Step 2: Set up CI/CD pipeline
16- [ ] Step 3: Define deployment strategy
17- [ ] Step 4: Configure monitoring & alerting
18- [ ] Step 5: Set up environment management
19- [ ] Step 6: Document runbooks
20- [ ] Step 7: Validate against anti-patterns checklist
21```
22 
23## Docker Best Practices
24 
25### Multi-Stage Build
26 
27```dockerfile
28# WRONG: Single stage, bloated image
29FROM node:22
30WORKDIR /app
31COPY . .
32RUN npm install
33RUN npm run build
34CMD ["node", "dist/index.js"]
35# Result: 1.2GB image with devDependencies and source code
36 
37# CORRECT: Multi-stage build
38FROM node:22-alpine AS builder
39WORKDIR /app
40COPY package*.json ./
41RUN npm ci
42COPY . .
43RUN npm run build
44RUN npm prune --omit=dev
45 
46FROM node:22-alpine AS runner
47WORKDIR /app
48ENV NODE_ENV=production
49RUN addgroup -g 1001 appgroup && adduser -u 1001 -G appgroup -s /bin/sh -D appuser
50COPY --from=builder /app/dist ./dist
51COPY --from=builder /app/node_modules ./node_modules
52COPY --from=builder /app/package.json ./
53USER appuser
54EXPOSE 3000
55CMD ["node", "dist/index.js"]
56# Result: ~150MB image, no devDependencies, non-root user
57```
58 
59### Python Multi-Stage
60 
61```dockerfile
62…