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WalkthroughUpdates backend and frontend Dockerfiles; removes Jenkins pipelines and Terraform infrastructure for Jenkins server; deletes older Kubernetes manifests; adds new k8s manifests for backend, database, frontend, ingress, HPA, PVC/PV, and a Kind cluster definition. Changes
Sequence Diagram(s)sequenceDiagram
autonumber
participant U as User
participant I as Ingress
participant F as frontend-svc
participant B as backend-svc
participant FE as Frontend Pod(s)
participant BE as Backend Pod(s)
participant DB as MongoDB (mongo-svc)
rect rgb(245,248,250)
note over U,I: HTTP requests via host 13.126.110.2.nip.io
U->>I: GET /
I->>F: Route to port 3000
F->>FE: Forward request
FE-->>U: Serve static UI
end
rect rgb(245,250,245)
U->>I: GET /api/...
I->>B: Route to port 3500
B->>BE: Forward request
BE->>DB: Query using mongo-secrets creds
DB-->>BE: Data
BE-->>U: JSON response
end
note right of BE: HPA monitors CPU (50% target)
Estimated code review effort🎯 4 (Complex) | ⏱️ ~60 minutes Poem
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Actionable comments posted: 7
Caution
Some comments are outside the diff and can’t be posted inline due to platform limitations.
⚠️ Outside diff range comments (2)
k8s-manifests/frontend/deployment.yml (2)
24-30: Harden the container and add basic health checks/resources.Address Checkov findings and improve operability with probes and resource requests/limits.
containers: - name: frontend image: abhimaske/frontend-image:latest imagePullPolicy: Always - ports: - - containerPort: 3000 + securityContext: + allowPrivilegeEscalation: false + readOnlyRootFilesystem: true + runAsNonRoot: true + capabilities: + drop: ["ALL"] + resources: + requests: + cpu: "100m" + memory: "128Mi" + limits: + cpu: "250m" + memory: "256Mi" + ports: + - containerPort: 3000 + readinessProbe: + httpGet: + path: / + port: 3000 + initialDelaySeconds: 5 + periodSeconds: 10 + livenessProbe: + httpGet: + path: / + port: 3000 + initialDelaySeconds: 15 + periodSeconds: 20
24-30: Ensure removal of runtime REACT_APP_BACKEND_URL or inject it at build timeWe still see a runtime reference to
REACT_APP_BACKEND_URLin your frontend code. Either switch to hard-coded relative endpoints (e.g./api/tasks) or rebuild the image with the correctREACT_APP_BACKEND_URLbaked in.• Application-Code/frontend/src/services/taskServices.js
– Line 2:const apiUrl = process.env.REACT_APP_BACKEND_URL
– Console log and subsequent calls rely on this valueSuggested fix:
- const apiUrl = process.env.REACT_APP_BACKEND_URL + const apiUrl = "/api/tasks"—or— ensure your Docker build sets
REACT_APP_BACKEND_URLto the cluster’s ingress endpoint so the value is available at runtime.
🧹 Nitpick comments (18)
k8s-manifests/cluster.yml (1)
1-15: Kind cluster: add name and extraPortMappings for Ingress/HTTP accessIf you plan to access services via an Ingress inside kind, map host ports 80/443. Also consider naming the cluster for clarity.
Apply this diff to the control-plane node:
kind: Cluster apiVersion: kind.x-k8s.io/v1alpha4 nodes: - role: control-plane image: kindest/node:v1.32.2 + extraPortMappings: + - containerPort: 80 + hostPort: 80 + protocol: TCP + - containerPort: 443 + hostPort: 443 + protocol: TCPOptionally, add a name:
kind: Cluster apiVersion: kind.x-k8s.io/v1alpha4 +name: three-tier-kindApplication-Code/backend/Dockerfile (1)
1-13: Harden and optimize Node image (LTS, prod deps only, non-root, EXPOSE)Current image (Node 18) is EOL. Also, install only production deps, run as non-root, and expose the app port (3500 per k8s deployment).
Apply:
-FROM node:18-alpine +FROM node:20-alpine WORKDIR /app -COPY package*.json ./ -RUN npm install +ENV NODE_ENV=production +COPY package*.json ./ +# Prefer reproducible installs; falls back if no lockfile +RUN if [ -f package-lock.json ]; then npm ci --omit=dev; else npm install --omit=dev; fi COPY . . -CMD ["node", "index.js"] +EXPOSE 3500 +# Drop root privileges (node user exists in upstream image) +USER node +CMD ["node", "index.js"]Additionally, ensure a .dockerignore exists to keep the image small (node_modules, logs, build artifacts). I can draft it if you want.
k8s-manifests/database/pv.yml (1)
11-15: Fix YAML lint issues and indentationTrailing spaces and wrong indentation on accessModes.
Apply:
spec: storageClassName: standard capacity: - storage: 5Gi - + storage: 5Gi + accessModes: - - ReadWriteOnce + - ReadWriteOnceAlso remove trailing spaces on lines with hostPath and any blank extra line at the end.
k8s-manifests/frontend/service.yml (1)
1-18: Tidy YAML (trailing spaces, spacing, and explicit targetPort/name)Minor YAML lint issues and small clarity tweaks.
Apply:
metadata: - name: frontend-svc - namespace: three-tier + name: frontend-svc + namespace: three-tier spec: - ports: - - port: 3000 - protocol: TCP + ports: + - name: http + port: 3000 + targetPort: 3000 + protocol: TCP - type: ClusterIP + type: ClusterIP selector: - role: frontend + role: frontendRationale:
- Indentation normalized.
- Removed trailing spaces.
- Explicit port name/targetPort improves readability and future-proofing (e.g., when using Ingress backends by name).
k8s-manifests/database/secrets.yml (1)
8-14: Normalize Secret type and fix YAML lint issues.Use the canonical type and clean spacing to avoid drift and linter noise.
Apply this diff:
type: opaque +type: Opaque data: password: YWJoaTEyMw== # abhi123 - username: YWJoaW1hc2tl # abhimaske + username: YWJoaW1hc2tl # abhimaske - - - +k8s-manifests/backend/service.yml (1)
6-6: Trim trailing whitespace and consider explicit targetPort/port name.No functional impact, but keeps diffs/lint clean and improves clarity.
Apply this diff to fix trailing space and optionally add explicit fields:
-spec: +spec: ports: - - port: 3500 + - name: http + port: 3500 + targetPort: 3500 protocol: TCPk8s-manifests/database/service.yml (3)
6-6: Remove trailing space after namespace.Minor lint fix.
- namespace: three-tier + namespace: three-tier
12-15: Port name “mongo-pvc” is misleading; rename to a protocol/port purpose.Port names are for protocol discovery, not storage. Use “mongo” or “mongodb”.
- - name: mongo-pvc + - name: mongo protocol: TCP port: 27017 targetPort: 27017
16-17: Drop extra blank line at end of file.Keeps YAML tidy and satisfies linters.
-k8s-manifests/hpa.yml (1)
14-15: Align min/max with Deployment’s replica expectations.Your backend Deployment defaults to 2 replicas; HPA minReplicas: 1 will allow scaling down below current baseline. If you want to maintain at least 2, set minReplicas: 2.
- minReplicas: 1 + minReplicas: 2k8s-manifests/ingress.yml (1)
6-8: Consider specifying ingressClassName and TLS for production.
- Add ingressClassName: nginx to bind explicitly to the NGINX controller.
- Add TLS with a host and secretName for HTTPS.
Example:
metadata: name: three-tier-ingress namespace: three-tier annotations: nginx.ingress.kubernetes.io/rewrite-target: / +ingressClassName: nginx spec: rules: - host: "13.126.110.2.nip.io" + tls: + - hosts: + - "13.126.110.2.nip.io" + secretName: three-tier-tlsk8s-manifests/frontend/deployment.yml (2)
8-10: Trim trailing whitespace to satisfy linters.Lines 8–9 contain trailing spaces flagged by yamllint.
Apply:
- -spec: +spec:
26-26: Avoid using thelatesttag for images.Pin to a version or digest to ensure repeatable deploys.
Example:
- image: abhimaske/frontend-image:latest + image: abhimaske/frontend-image:v1.0.0 # or pin by digest +# image: abhimaske/frontend-image@sha256:<digest>k8s-manifests/database/deployment.yml (2)
24-46: Harden Mongo container and add health probes.Improve security posture and resilience.
spec: containers: - name: mongo image: mongo:4.4.6 + securityContext: + runAsNonRoot: true + allowPrivilegeEscalation: false + readOnlyRootFilesystem: true + capabilities: + drop: ["ALL"] + # If the image requires a specific uid/gid, set them explicitly + # runAsUser: 999 + # runAsGroup: 999 + # fsGroup: 999 ports: - containerPort: 27017 + readinessProbe: + exec: + command: ["mongosh", "--eval", "db.adminCommand('ping')"] + initialDelaySeconds: 15 + periodSeconds: 10 + livenessProbe: + tcpSocket: + port: 27017 + initialDelaySeconds: 30 + periodSeconds: 20Note:
mongoshmust be present in the image; otherwise switch readinessProbe to a TCP check as well.
1-53: Fix indentation, trailing spaces, and stray blank lines flagged by yamllint.Numerous indentation issues and trailing spaces (e.g., lines 36, 41, 42, 46, 50, 51) will cause CI/style failures and can hinder readability.
Happy to push a cleaned YAML if you’d like.
k8s-manifests/backend/deployment.yml (2)
20-40: Harden the backend container to address Checkov findings.Add a container securityContext to avoid running as root and block privilege escalation.
containers: - name: three-tier-app image: abhimaske/backend-image:latest imagePullPolicy: Always + securityContext: + allowPrivilegeEscalation: false + readOnlyRootFilesystem: true + runAsNonRoot: true + capabilities: + drop: ["ALL"]
3-3: Trim trailing whitespace and extra blank lines.Yamllint flagged trailing spaces on lines 3, 15, 54, 56 and an extra blank line at the end.
Also applies to: 15-15, 54-54, 56-56, 69-69
k8s-manifests/database/pvc.yml (1)
8-8: Clean trailing spaces and extra blank lines in PVC manifest.Minor formatting issues flagged by yamllint.
-spec: +spec: @@ - +Also applies to: 17-17
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📒 Files selected for processing (36)
Application-Code/backend/Dockerfile(1 hunks)Application-Code/frontend/Dockerfile(1 hunks)Jenkins-Pipeline-Code/Jenkinsfile-Backend(0 hunks)Jenkins-Pipeline-Code/Jenkinsfile-Frontend(0 hunks)Jenkins-Server-TF/.terraform.lock.hcl(0 hunks)Jenkins-Server-TF/backend.tf(0 hunks)Jenkins-Server-TF/ec2.tf(0 hunks)Jenkins-Server-TF/gather.tf(0 hunks)Jenkins-Server-TF/iam-instance-profile.tf(0 hunks)Jenkins-Server-TF/iam-policy.tf(0 hunks)Jenkins-Server-TF/iam-role.tf(0 hunks)Jenkins-Server-TF/provider.tf(0 hunks)Jenkins-Server-TF/tools-install.sh(0 hunks)Jenkins-Server-TF/variables.tf(0 hunks)Jenkins-Server-TF/variables.tfvars(0 hunks)Jenkins-Server-TF/vpc.tf(0 hunks)Kubernetes-Manifests-file/Backend/deployment.yaml(0 hunks)Kubernetes-Manifests-file/Database/deployment.yaml(0 hunks)Kubernetes-Manifests-file/Database/pv.yaml(0 hunks)Kubernetes-Manifests-file/Database/secrets.yaml(0 hunks)Kubernetes-Manifests-file/Database/service.yaml(0 hunks)Kubernetes-Manifests-file/Frontend/service.yaml(0 hunks)Kubernetes-Manifests-file/ingress.yaml(0 hunks)k8s-manifests/backend/deployment.yml(1 hunks)k8s-manifests/backend/service.yml(1 hunks)k8s-manifests/cluster.yml(1 hunks)k8s-manifests/database/deployment.yml(1 hunks)k8s-manifests/database/namespace.yml(1 hunks)k8s-manifests/database/pv.yml(1 hunks)k8s-manifests/database/pvc.yml(1 hunks)k8s-manifests/database/secrets.yml(1 hunks)k8s-manifests/database/service.yml(1 hunks)k8s-manifests/frontend/deployment.yml(2 hunks)k8s-manifests/frontend/service.yml(1 hunks)k8s-manifests/hpa.yml(1 hunks)k8s-manifests/ingress.yml(1 hunks)
💤 Files with no reviewable changes (21)
- Jenkins-Server-TF/.terraform.lock.hcl
- Kubernetes-Manifests-file/Frontend/service.yaml
- Jenkins-Server-TF/provider.tf
- Jenkins-Server-TF/iam-role.tf
- Kubernetes-Manifests-file/Database/service.yaml
- Jenkins-Server-TF/iam-policy.tf
- Kubernetes-Manifests-file/ingress.yaml
- Jenkins-Server-TF/ec2.tf
- Jenkins-Server-TF/gather.tf
- Jenkins-Pipeline-Code/Jenkinsfile-Frontend
- Jenkins-Server-TF/vpc.tf
- Jenkins-Server-TF/variables.tf
- Jenkins-Server-TF/iam-instance-profile.tf
- Jenkins-Server-TF/variables.tfvars
- Kubernetes-Manifests-file/Backend/deployment.yaml
- Kubernetes-Manifests-file/Database/pv.yaml
- Jenkins-Server-TF/tools-install.sh
- Jenkins-Server-TF/backend.tf
- Kubernetes-Manifests-file/Database/secrets.yaml
- Jenkins-Pipeline-Code/Jenkinsfile-Backend
- Kubernetes-Manifests-file/Database/deployment.yaml
🧰 Additional context used
🪛 YAMLlint (1.37.1)
k8s-manifests/database/service.yml
[error] 6-6: trailing spaces
(trailing-spaces)
[warning] 16-16: too many blank lines (1 > 0)
(empty-lines)
k8s-manifests/backend/service.yml
[error] 6-6: trailing spaces
(trailing-spaces)
k8s-manifests/frontend/service.yml
[error] 14-14: trailing spaces
(trailing-spaces)
[warning] 17-17: too many blank lines (3 > 0)
(empty-lines)
k8s-manifests/backend/deployment.yml
[error] 3-3: trailing spaces
(trailing-spaces)
[error] 15-15: trailing spaces
(trailing-spaces)
[error] 54-54: trailing spaces
(trailing-spaces)
[error] 56-56: trailing spaces
(trailing-spaces)
[warning] 69-69: too many blank lines (1 > 0)
(empty-lines)
k8s-manifests/database/deployment.yml
[warning] 8-8: wrong indentation: expected 2 but found 3
(indentation)
[warning] 11-11: wrong indentation: expected 1 but found 2
(indentation)
[warning] 13-13: wrong indentation: expected 3 but found 4
(indentation)
[warning] 14-14: wrong indentation: expected 5 but found 6
(indentation)
[warning] 17-17: wrong indentation: expected 3 but found 4
(indentation)
[warning] 18-18: wrong indentation: expected 5 but found 6
(indentation)
[warning] 21-21: wrong indentation: expected 7 but found 8
(indentation)
[warning] 25-25: wrong indentation: expected 5 but found 6
(indentation)
[warning] 31-31: wrong indentation: expected 10 but found 11
(indentation)
[warning] 33-33: wrong indentation: expected 14 but found 15
(indentation)
[warning] 34-34: wrong indentation: expected 16 but found 17
(indentation)
[error] 36-36: trailing spaces
(trailing-spaces)
[warning] 39-39: wrong indentation: expected 14 but found 15
(indentation)
[warning] 40-40: wrong indentation: expected 16 but found 18
(indentation)
[error] 41-41: trailing spaces
(trailing-spaces)
[error] 42-42: trailing spaces
(trailing-spaces)
[warning] 44-44: wrong indentation: expected 10 but found 12
(indentation)
[error] 46-46: trailing spaces
(trailing-spaces)
[warning] 48-48: wrong indentation: expected 7 but found 8
(indentation)
[warning] 50-50: wrong indentation: expected 11 but found 12
(indentation)
[error] 50-50: trailing spaces
(trailing-spaces)
[error] 51-51: trailing spaces
(trailing-spaces)
[warning] 52-52: too many blank lines (1 > 0)
(empty-lines)
k8s-manifests/ingress.yml
[warning] 23-23: wrong indentation: expected 10 but found 9
(indentation)
[warning] 24-24: wrong indentation: expected 11 but found 10
(indentation)
[warning] 26-26: wrong indentation: expected 12 but found 11
(indentation)
[error] 26-26: trailing spaces
(trailing-spaces)
k8s-manifests/database/secrets.yml
[warning] 11-11: too many spaces after colon
(colons)
[error] 12-12: trailing spaces
(trailing-spaces)
[warning] 14-14: too many blank lines (2 > 0)
(empty-lines)
k8s-manifests/database/pv.yml
[error] 6-6: trailing spaces
(trailing-spaces)
[error] 13-13: trailing spaces
(trailing-spaces)
[warning] 15-15: wrong indentation: expected 4 but found 6
(indentation)
[error] 17-17: trailing spaces
(trailing-spaces)
[warning] 19-19: too many blank lines (1 > 0)
(empty-lines)
k8s-manifests/frontend/deployment.yml
[error] 8-8: trailing spaces
(trailing-spaces)
[error] 9-9: trailing spaces
(trailing-spaces)
k8s-manifests/database/pvc.yml
[error] 8-8: trailing spaces
(trailing-spaces)
[warning] 17-17: too many blank lines (3 > 0)
(empty-lines)
🪛 Checkov (3.2.334)
k8s-manifests/backend/deployment.yml
[MEDIUM] 1-68: Containers should not run with allowPrivilegeEscalation
(CKV_K8S_20)
[MEDIUM] 1-68: Minimize the admission of root containers
(CKV_K8S_23)
k8s-manifests/database/deployment.yml
[MEDIUM] 1-50: Containers should not run with allowPrivilegeEscalation
(CKV_K8S_20)
[MEDIUM] 1-50: Minimize the admission of root containers
(CKV_K8S_23)
k8s-manifests/frontend/deployment.yml
[MEDIUM] 1-29: Containers should not run with allowPrivilegeEscalation
(CKV_K8S_20)
[MEDIUM] 1-29: Minimize the admission of root containers
(CKV_K8S_23)
🔇 Additional comments (8)
k8s-manifests/database/namespace.yml (1)
1-7: Namespace manifest looks goodSimple, correct, and consistent with the rest of the PR.
k8s-manifests/frontend/service.yml (1)
13-14: Service selector matches Deployment labels
Verified that the Service’s selectorrole: frontendaligns with the Deployment’s labels ink8s-manifests/frontend/deployment.yml:
- metadata.labels.role: frontend (line 7)
- spec.selector.matchLabels.role: frontend (line 18)
- template.metadata.labels.role: frontend (line 22)
No changes required.
k8s-manifests/backend/service.yml (1)
4-4: Service rename and selector alignment look good.Name matches Ingress backend reference and selector matches backend Deployment labels.
Also applies to: 12-12
k8s-manifests/hpa.yml (1)
17-23: CPU requests confirmed in backend DeploymentThe backend Deployment (k8s-manifests/backend/deployment.yml) already specifies:
- resources.requests.cpu: "250m" (line 43)
HPA’s averageUtilization target will work as expected.
Application-Code/frontend/Dockerfile (1)
18-18: Ensure backend URL is baked into the buildDetected use of
process.env.REACT_APP_BACKEND_URLat runtime, which CRA only inlines at build time. SinceCMD ["serve", "-s", "build", "-l", "3000"]simply serves static files (no runtime templating), confirm one of the following:
- You pass
REACT_APP_BACKEND_URLinto the build step (e.g.,
docker build --build-arg REACT_APP_BACKEND_URL=$BACKEND_URL ...)- You switch to relative API paths (e.g., fetch(
/api/tasks)) and handle routing via ingress rewriting.Locations to review:
- Application-Code/frontend/src/services/taskServices.js:2
k8s-manifests/backend/deployment.yml (2)
41-48: Good resource requests/limits and well-defined probes.The resource section looks reasonable for a starter profile, and probes on /ok are in place.
26-37: Verify Kubernetes secret keys
Please confirm that themongo-secretssecret in thethree-tiernamespace contains bothusernameandpasswordkeys, as referenced by theMONGO_USERNAMEandMONGO_PASSWORDenvironment variables.k8s-manifests/database/pvc.yml (1)
1-15: PVC configuration aligns with PV storageClass and size.Name, storageClassName, and requested size changes look consistent with the PV. This should bind successfully.
| RUN npm install --only=production | ||
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| # Install 'serve' globally (for serving static files) | ||
| RUN npm install -g serve | ||
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| COPY . . | ||
| CMD [ "npm", "start" ] | ||
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| RUN npm run build | ||
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There was a problem hiding this comment.
🛠️ Refactor suggestion
Build will likely fail: devDependencies are not installed before npm run build.
npm install --only=production excludes devDependencies (e.g., react-scripts), which are required for the build step. This will break npm run build. Also, Node 14 is EOL; consider upgrading and using a multi-stage build to reduce image size and improve security.
Apply this multi-stage refactor:
-FROM node:14
-
-WORKDIR /app
-
-COPY package*.json ./
-
-RUN npm install --only=production
-
-# Install 'serve' globally (for serving static files)
-RUN npm install -g serve
-
-COPY . .
-
-RUN npm run build
-
-EXPOSE 3000
-
-CMD ["serve", "-s", "build", "-l", "3000"]
+FROM node:18-alpine AS builder
+WORKDIR /app
+COPY package*.json ./
+# Install all deps (including dev) for build determinism and speed
+RUN npm ci
+COPY . .
+RUN npm run build
+
+# Runtime stage
+FROM node:18-alpine AS runtime
+WORKDIR /app
+RUN npm install -g serve@14
+# Copy only the built assets
+COPY --from=builder /app/build /app/build
+EXPOSE 3000
+# Drop root
+USER node
+CMD ["serve", "-s", "build", "-l", "3000"]Also applies to: 1-20
🤖 Prompt for AI Agents
In Application-Code/frontend/Dockerfile around lines 7 to 15, the Dockerfile
runs npm install --only=production before npm run build which omits
devDependencies (like build toolchains) and will break the build; refactor to a
multi-stage build: use a modern Node LTS base (e.g., node:18) in the builder
stage, copy package.json and package-lock.json, run npm install (full dev deps)
and run npm run build, then create a smaller production stage (node:18-alpine or
nginx) that copies only the build output, installs only production deps if
needed, and does not include devDependencies; optionally install a lightweight
static server in the final stage or use nginx and avoid global serve in builder
to minimize image size and surface attack surface.
| replicas: 2 | ||
| selector: |
There was a problem hiding this comment.
PVC is ReadWriteOnce; 2 replicas will fail to mount. Use 1 replica or migrate to StatefulSet.
With a single RWO PVC (mongo-pvc), multiple pods cannot mount the same volume across nodes. Either set replicas to 1 or switch to a StatefulSet with per-pod PVCs.
Minimal safe fix:
spec:
- replicas: 2
+ replicas: 1Optional, recommended follow-up: convert to StatefulSet with volumeClaimTemplates and a Headless Service for a proper MongoDB replicaset.
Also applies to: 47-50
🧰 Tools
🪛 YAMLlint (1.37.1)
[warning] 11-11: wrong indentation: expected 1 but found 2
(indentation)
| name: mongo-pod | ||
| namespace: three-tier | ||
| labels: | ||
| app: mongodb | ||
|
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There was a problem hiding this comment.
Invalid fields in Pod template metadata (name and namespace).
template.metadata must not set name or namespace. These will be rejected by the API.
Remove them:
metadata:
- name: mongo-pod
- namespace: three-tier
labels:
app: mongodb📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| name: mongo-pod | |
| namespace: three-tier | |
| labels: | |
| app: mongodb | |
| metadata: | |
| labels: | |
| app: mongodb |
🧰 Tools
🪛 YAMLlint (1.37.1)
[warning] 18-18: wrong indentation: expected 5 but found 6
(indentation)
[warning] 21-21: wrong indentation: expected 7 but found 8
(indentation)
🤖 Prompt for AI Agents
In k8s-manifests/database/deployment.yml around lines 18 to 22, the Pod template
metadata incorrectly includes the name and namespace fields which are not
allowed; remove the name and namespace entries from template.metadata so the
Deployment only sets labels/annotations there and relies on the Deployment's
metadata.name and metadata.namespace instead, ensuring the manifest validates
against the Kubernetes API.
| metadata: | ||
| name: mongo-pv | ||
| namespace: three-tier | ||
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There was a problem hiding this comment.
PersistentVolume is cluster-scoped; remove metadata.namespace
PV objects cannot be namespaced. This will fail validation in many setups.
Apply:
metadata:
name: mongo-pv
- namespace: three-tier 📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| metadata: | |
| name: mongo-pv | |
| namespace: three-tier | |
| metadata: | |
| name: mongo-pv |
🧰 Tools
🪛 YAMLlint (1.37.1)
[error] 6-6: trailing spaces
(trailing-spaces)
🤖 Prompt for AI Agents
In k8s-manifests/database/pv.yml around lines 4 to 7, the PersistentVolume
manifest incorrectly includes a metadata.namespace field (PV objects are
cluster-scoped and must not have a namespace). Remove the namespace line from
the metadata section so the PV has only metadata.name (and any
labels/annotations if needed) and validate the file to ensure no other namespace
fields remain.
| spec: | ||
| storageClassName: standard | ||
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| capacity: | ||
| storage: 5Gi | ||
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| accessModes: | ||
| - ReadWriteOnce | ||
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| hostPath: | ||
| path: /mnt/data | ||
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💡 Verification agent
🧩 Analysis chain
Storage design will break with multiple MongoDB replicas and hostPath
- hostPath PV + ReadWriteOnce cannot be mounted by 2 Mongo pods simultaneously.
- hostPath on a multi-node kind cluster is node-local and not suitable for HA/stateful multi-replica setups.
Recommended:
- Use a StatefulSet with volumeClaimTemplates and set replicas: 1 for MongoDB; or
- Provide a RWX-capable storage class (e.g., NFS) if you truly need multiple replicas; or
- In kind, prefer dynamic provisioning via the cluster’s default StorageClass and just create a PVC (no static PV), letting the provisioner handle it.
If you stick with hostPath for local dev:
- Keep a single Mongo replica and pin the pod to one node via nodeSelector or tolerations to avoid accidental rescheduling data loss.
I can provide a Mongo StatefulSet + PVC patch aligned to your decision.
To verify the current setup across the repo (replica count and PVC usage), run:
🏁 Script executed:
#!/bin/bash
# Check Mongo deployment replicas and PVC references
rg -n -C2 -g 'k8s-manifests/**' -P '(?s)kind:\s*Deployment.*metadata:\s*name:\s*.*mongo.*?$.*?\n.*?replicas:\s*(\d+)'
rg -n -C2 -g 'k8s-manifests/**' -P 'PersistentVolumeClaim|volumeMounts|claimName'Length of output: 1042
🏁 Script executed:
#!/bin/bash
# Display MongoDB Deployment for replicas, node selectors, and scheduling hints
echo "=== deployment.yml ==="
sed -n '1,200p' k8s-manifests/database/deployment.yml
# Display PVC to confirm storageClassName, accessModes, and capacity
echo
echo "=== pvc.yml ==="
sed -n '1,200p' k8s-manifests/database/pvc.ymlLength of output: 1421
MongoDB Deployment with hostPath PV and 2 replicas will break
We’ve confirmed your mongo-dep Deployment is set to replicas: 2 and mounts a hostPath-backed PVC (mongo-pvc). A hostPath PV with ReadWriteOnce only supports single-node access and cannot reliably share data across pods on different nodes:
• Location:
– k8s-manifests/database/pv.yml (hostPath PV + RWO)
– k8s-manifests/database/deployment.yml (replicas: 2, mounts mongo-pvc)
Recommendations (choose one):
- Convert to a StatefulSet with
volumeClaimTemplatesand keepreplicas: 1for local dev, or scale out against a proper RWX storage class. - Switch to a RWX-capable storage class (e.g., NFS) if you need multiple Mongo replicas concurrently.
- Use dynamic provisioning via the cluster’s default StorageClass—remove the static PV and let the provisioner handle PV creation.
If you must stick with hostPath for local development:
- Reduce to a single Mongo replica (
replicas: 1) - Pin the pod to one node via
nodeSelectoror tolerations to prevent cross-node scheduling
Let me know which approach you’d like—I can draft a StatefulSet + PVC patch accordingly.
🧰 Tools
🪛 YAMLlint (1.37.1)
[error] 13-13: trailing spaces
(trailing-spaces)
[warning] 15-15: wrong indentation: expected 4 but found 6
(indentation)
[error] 17-17: trailing spaces
(trailing-spaces)
[warning] 19-19: too many blank lines (1 > 0)
(empty-lines)
🤖 Prompt for AI Agents
k8s-manifests/database/pv.yml lines 8-19: the current PV uses hostPath with
accessMode ReadWriteOnce which cannot support your Deployment's replicas:2; fix
by one of these concrete options: (A) for quick local-dev: set the Mongo
Deployment replicas to 1 (or pin pods to a single node via
nodeSelector/tolerations) and keep hostPath; (B) for multi-replica correctness:
replace the static hostPath PV with a RWX-capable StorageClass (e.g., NFS) and
reference that StorageClassName so multiple pods can mount concurrently; (C)
better for stateful workloads: convert the Deployment to a StatefulSet using
volumeClaimTemplates (one PVC per replica) and remove the hostPath static PV so
dynamic provisioning can create appropriate PVs; or (D) remove the static PV
entirely and rely on the cluster’s default StorageClass for dynamic
provisioning—choose one and update pv.yml (or deployment/statefulset)
accordingly.
| type: opaque | ||
| data: | ||
| password: YWJoaTEyMw== # abhi123 | ||
| username: YWJoaW1hc2tl # abhimaske |
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Do not commit plaintext credentials as Kubernetes Secret data in VCS. Rotate and externalize.
Base64 ≠ encryption. These hardcoded creds are recoverable from the repo history. Move secret creation to runtime (CI/CD or cluster), rotate the Mongo credentials, and remove this file from git. Options:
- Use SealedSecrets or External Secrets (preferred).
- Or generate/apply at deploy time: kubectl create secret ... --dry-run=client -o yaml | kubectl apply -f -
I can provide SealedSecret/ExternalSecret templates and a migration checklist if you want.
🧰 Tools
🪛 YAMLlint (1.37.1)
[warning] 11-11: too many spaces after colon
(colons)
🤖 Prompt for AI Agents
In k8s-manifests/database/secrets.yml around lines 8 to 11, the file contains
base64-encoded plaintext Mongo credentials committed to VCS; remove these
secrets from the repo, rotate the Mongo user/password immediately, and stop
committing secrets. Replace the tracked file with a mechanism that injects
secrets at deploy/runtime: either adopt SealedSecrets or ExternalSecrets
(preferred) or generate the Secret in CI/CD/cluster using kubectl create secret
... --dry-run=client -o yaml | kubectl apply -f -; update manifests to reference
the external/sealed secret name, add the file to .gitignore, and purge the
leaked credentials from git history (use git filter-repo or BFG) after rotating
credentials.
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| pathType: Prefix | ||
| backend: | ||
| service: | ||
| name: backend-svc | ||
| port: | ||
| number: 3500 | ||
| - path: / | ||
| pathType: Prefix | ||
| backend: | ||
| service: | ||
| name: frontend-svc | ||
| port: | ||
| number: 3000 |
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Two identical “/” paths will shadow one another; frontend or backend becomes unreachable.
NGINX will only route one of these. Use distinct paths or hosts (e.g., “/api” for backend, “/” for frontend).
Apply this diff to separate routes and fix indentation/trailing space:
paths:
- - path: /
+ - path: /api
pathType: Prefix
backend:
service:
name: backend-svc
port:
number: 3500
- path: /
pathType: Prefix
backend:
- service:
- name: frontend-svc
- port:
- number: 3000
+ service:
+ name: frontend-svc
+ port:
+ number: 3000📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| - path: / | |
| pathType: Prefix | |
| backend: | |
| service: | |
| name: backend-svc | |
| port: | |
| number: 3500 | |
| - path: / | |
| pathType: Prefix | |
| backend: | |
| service: | |
| name: frontend-svc | |
| port: | |
| number: 3000 | |
| - path: /api | |
| pathType: Prefix | |
| backend: | |
| service: | |
| name: backend-svc | |
| port: | |
| number: 3500 | |
| - path: / | |
| pathType: Prefix | |
| backend: | |
| service: | |
| name: frontend-svc | |
| port: | |
| number: 3000 |
🧰 Tools
🪛 YAMLlint (1.37.1)
[warning] 23-23: wrong indentation: expected 10 but found 9
(indentation)
[warning] 24-24: wrong indentation: expected 11 but found 10
(indentation)
[warning] 26-26: wrong indentation: expected 12 but found 11
(indentation)
[error] 26-26: trailing spaces
(trailing-spaces)
🤖 Prompt for AI Agents
In k8s-manifests/ingress.yml around lines 13 to 26, there are two identical "/"
path entries which shadow each other; change the backend route to a distinct
path or host (for example use "/api" for the backend and keep "/" for the
frontend), correct YAML indentation for the backend service block so keys
(service, name, port, number) align properly, ensure pathType: Prefix is present
for both, and remove trailing spaces on lines to produce valid, unambiguous
ingress routing.
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Summary by CodeRabbit
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