Ques:-
We encountered an issue with our Nginx and PHP-FPM setup on the Kubernetes cluster this morning, which halted its functionality. Investigate and rectify the issue:
The pod name is nginx-phpfpm and configmap name is nginx-config. Identify and fix the problem.
Once resolved, copy /home/thor/index.php file from the jump host to the nginx-container within the nginx document root.
Ans:-
Based on the investigation, the nginx-phpfpm pod stopped working due to a misconfigured volume mount path. The Nginx container was expecting to serve files from /var/www/html, but the actual volume was mounted at a different path, causing the application to fail.
Shared volume: emptyDir named shared-files is correctly mounted in both containers.
Mismatch in Shared Volume Paths
- PHP-FPM writes to
/usr/share/nginx/html - Nginx serves from
/var/www/html
Use the same mount path in both containers, e.g.:
mountPath: /var/www/html
raj@jumphost ~$ kubectl get cm
NAME DATA AGE
kube-root-ca.crt 1 15m
nginx-config 1 9m55s
raj@jumphost ~$ kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-phpfpm 2/2 Running 0 10m
raj@jumphost ~$ kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 16m
nginx-service NodePort 10.96.119.83 <none> 8099:30008/TCP 10m
raj@jumphost ~$ kubectl describe cm nginx-config
Name: nginx-config
Namespace: default
Labels: <none>
Annotations: <none>
Data
====
nginx.conf:
----
events {
}
http {
server {
listen 8099 default_server;
listen [::]:8099 default_server;
# Set nginx to serve files from the shared volume!
root /var/www/html;
index index.html index.htm index.php;
server_name _;
location / {
try_files $uri $uri/ =404;
}
location ~ \.php$ {
include fastcgi_params;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_pass 127.0.0.1:9000;
}
}
}
BinaryData
====
Events: <none>
raj@jumphost ~$ kubectl get pod nginx-phpfpm -oyaml
apiVersion: v1
kind: Pod
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","kind":"Pod","metadata":{"annotations":{},"labels":{"app":"php-app"},"name":"nginx-phpfpm","namespace":"default"},"spec":{"containers":[{"image":"php:7.2-fpm-alpine","name":"php-fpm-container","volumeMounts":[{"mountPath":"/usr/share/nginx/html","name":"shared-files"}]},{"image":"nginx:latest","name":"nginx-container","volumeMounts":[{"mountPath":"/var/www/html","name":"shared-files"},{"mountPath":"/etc/nginx/nginx.conf","name":"nginx-config-volume","subPath":"nginx.conf"}]}],"volumes":[{"emptyDir":{},"name":"shared-files"},{"configMap":{"name":"nginx-config"},"name":"nginx-config-volume"}]}}
creationTimestamp: "2025-10-08T02:07:06Z"
labels:
app: php-app
name: nginx-phpfpm
namespace: default
resourceVersion: "941"
uid: fe31425d-d2f5-4d56-8450-d2a0c05bb077
spec:
containers:
- image: php:7.2-fpm-alpine
imagePullPolicy: IfNotPresent
name: php-fpm-container
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /usr/share/nginx/html
name: shared-files
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: kube-api-access-s5m82
readOnly: true
- image: nginx:latest
imagePullPolicy: Always
name: nginx-container
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /var/www/html
name: shared-files
- mountPath: /etc/nginx/nginx.conf
name: nginx-config-volume
subPath: nginx.conf
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: kube-api-access-s5m82
readOnly: true
dnsPolicy: ClusterFirst
enableServiceLinks: true
nodeName: kodekloud-control-plane
preemptionPolicy: PreemptLowerPriority
priority: 0
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
serviceAccount: default
serviceAccountName: default
terminationGracePeriodSeconds: 30
tolerations:
- effect: NoExecute
key: node.kubernetes.io/not-ready
operator: Exists
tolerationSeconds: 300
- effect: NoExecute
key: node.kubernetes.io/unreachable
operator: Exists
tolerationSeconds: 300
volumes:
- emptyDir: {}
name: shared-files
- configMap:
defaultMode: 420
name: nginx-config
name: nginx-config-volume
- name: kube-api-access-s5m82
projected:
defaultMode: 420
sources:
- serviceAccountToken:
expirationSeconds: 3607
path: token
- configMap:
items:
- key: ca.crt
path: ca.crt
name: kube-root-ca.crt
- downwardAPI:
items:
- fieldRef:
apiVersion: v1
fieldPath: metadata.namespace
path: namespace
status:
conditions:
- lastProbeTime: null
lastTransitionTime: "2025-10-08T02:07:06Z"
status: "True"
type: Initialized
- lastProbeTime: null
lastTransitionTime: "2025-10-08T02:07:19Z"
status: "True"
type: Ready
- lastProbeTime: null
lastTransitionTime: "2025-10-08T02:07:19Z"
status: "True"
type: ContainersReady
- lastProbeTime: null
lastTransitionTime: "2025-10-08T02:07:06Z"
status: "True"
type: PodScheduled
containerStatuses:
- containerID: containerd://8c9917ce159003d767caeef3f0c165c702a8dccb3cfc14c0f55ee915318a73f6
image: docker.io/library/nginx:latest
imageID: docker.io/library/nginx@sha256:8adbdcb969e2676478ee2c7ad333956f0c8e0e4c5a7463f4611d7a2e7a7ff5dc
lastState: {}
name: nginx-container
ready: true
restartCount: 0
started: true
state:
running:
startedAt: "2025-10-08T02:07:18Z"
- containerID: containerd://140e6aae1e89eeea22f8112bc02535514763d73abc166fab83691c03d33aa783
image: docker.io/library/php:7.2-fpm-alpine
imageID: docker.io/library/php@sha256:2e2d92415f3fc552e9a62548d1235f852c864fcdc94bcf2905805d92baefc87f
lastState: {}
name: php-fpm-container
ready: true
restartCount: 0
started: true
state:
running:
startedAt: "2025-10-08T02:07:10Z"
hostIP: 172.17.0.2
phase: Running
podIP: 10.244.0.5
podIPs:
- ip: 10.244.0.5
qosClass: BestEffort
startTime: "2025-10-08T02:07:06Z"
raj@jumphost ~$ kubectl edit pod nginx-phpfpm
raj@jumphost ~$ kubectl cp /home/thor/index.php default/nginx-phpfpm:/var/www/html/index.php -c nginx-container
raj@jumphost ~$ curl http://172.17.0.2:30008
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