Hello Community,
i am stucking on the Fix Issue with VolumeMounts in Kubernetes Task. This is the Task Description:
"We deployed a Nginx and PHPFPM based application on Kubernetes cluster last week and it had been working fine. This morning one of the team members made a change somewhere which caused some issues, and the application stopped working. Please look into the issue and fix it:
The pod name is nginx-phpfpm and configmap name is nginx-config, Nginx is running on port 8099. Figure out the issues and fix them.
Once you think issue is fixed copy /tmp/index.php from jump host to nginx-container under nginx document root and try to curl the nginx URL from nginx-container itself, you should be able to run the php page you copied. This step isn’t mandatory but it will be helpful to test the setup.
Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster."
This is the pod config:
thor@jump_host ~$ cat pod.yml
apiVersion: v1
kind: Pod
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{“apiVersion”:“v1”,“kind”:“Pod”,“metadata”:{“annotations”:{},“name”:“nginx-phpfpm”,“namespace”:“default”},“spec”:{“containers”:[{“image”:“php:7.2-fpm”,“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: “2020-12-29T07:45:51Z”
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:status:
f:conditions:
.: {}
k:{“type”:“PodScheduled”}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
manager: kube-scheduler
operation: Update
time: “2020-12-29T07:45:51Z” - apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
f:spec:
f:containers:
k:{“name”:“nginx-container”}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:volumeMounts:
.: {}
k:{“mountPath”:“/etc/nginx/nginx.conf”}:
.: {}
f:mountPath: {}
f:name: {}
f:subPath: {}
k:{“mountPath”:“/var/www/html”}:
.: {}
f:mountPath: {}
f:name: {}
k:{“name”:“php-fpm-container”}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:volumeMounts:
.: {}
k:{“mountPath”:“/usr/share/nginx/html”}:
.: {}
f:mountPath: {}
f:name: {}
f:dnsPolicy: {}
f:enableServiceLinks: {}
f:restartPolicy: {}
f:schedulerName: {}
f:securityContext: {}
f:terminationGracePeriodSeconds: {}
f:volumes:
.: {}
k:{“name”:“nginx-config-volume”}:
.: {}
f:configMap:
.: {}
f:defaultMode: {}
f:name: {}
f:name: {}
k:{“name”:“shared-files”}:
.: {}
f:emptyDir: {}
f:name: {}
manager: kubectl-client-side-apply
operation: Update
time: “2020-12-29T07:45:51Z” - apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:status:
f:conditions:
k:{“type”:“ContainersReady”}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
k:{“type”:“Initialized”}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:status: {}
f:type: {}
k:{“type”:“Ready”}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
f:containerStatuses: {}
f:hostIP: {}
f:startTime: {}
manager: kubelet
operation: Update
time: “2020-12-29T07:45:58Z”
name: nginx-phpfpm
namespace: default
resourceVersion: “615”
selfLink: /api/v1/namespaces/default/pods/nginx-phpfpm
uid: 0173c130-4ca1-443f-8d78-f7361d2fe9d9
spec:
containers: - image: php:7.2-fpm
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: default-token-62w57
readOnly: true
- mountPath: /usr/share/nginx/html
- 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: default-token-62w57
readOnly: true
dnsPolicy: ClusterFirst
enableServiceLinks: true
nodeName: node01
preemptionPolicy: PreemptLowerPriority
priority: 0
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
serviceAccount: default
serviceAccountName: default
terminationGracePeriodSeconds: 30
tolerations:
- mountPath: /var/www/html
- 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: default-token-62w57
secret:
defaultMode: 420
secretName: default-token-62w57
status:
conditions: - lastProbeTime: null
lastTransitionTime: “2020-12-29T07:45:58Z”
status: “True”
type: Initialized - lastProbeTime: null
lastTransitionTime: “2020-12-29T07:45:58Z”
message: ‘containers with unready status: [php-fpm-container nginx-container]’
reason: ContainersNotReady
status: “False”
type: Ready - lastProbeTime: null
lastTransitionTime: “2020-12-29T07:45:58Z”
message: ‘containers with unready status: [php-fpm-container nginx-container]’
reason: ContainersNotReady
status: “False”
type: ContainersReady - lastProbeTime: null
lastTransitionTime: “2020-12-29T07:45:58Z”
status: “True”
type: PodScheduled
containerStatuses: - image: nginx:latest
imageID: “”
lastState: {}
name: nginx-container
ready: false
restartCount: 0
started: false
state:
waiting:
reason: ContainerCreating - image: php:7.2-fpm
imageID: “”
lastState: {}
name: php-fpm-container
ready: false
restartCount: 0
started: false
state:
waiting:
reason: ContainerCreating
hostIP: 172.17.0.39
phase: Pending
qosClass: BestEffort
startTime: “2020-12-29T07:45:58Z”
and thats the corresponding CM:
thor@jump_host ~$ kubectl get cm nginx-config -o yaml
apiVersion: v1
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;
}
}
}
kind: ConfigMap
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{“apiVersion”:“v1”,“data”:{“nginx.conf”:“events {\n}\nhttp {\n server {\n listen 8099 default_server;\n listen [::]:8099 default_server;\n\n # Set nginx to serve files from the shared volume!\n root /var/www/html;\n index index.html index.htm index.php;\n server_name _;\n location / {\n try_files $uri $uri/ =404;\n }\n location ~ \.php$ {\n include fastcgi_params;\n fastcgi_param REQUEST_METHOD $request_method;\n fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;\n fastcgi_pass 127.0.0.1:9000;\n }\n }\n}\n”},“kind”:“ConfigMap”,“metadata”:{“annotations”:{},“name”:“nginx-config”,“namespace”:“default”}}
creationTimestamp: “2020-12-29T07:45:51Z”
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:data:
.: {}
f:nginx.conf: {}
f:metadata:
f:annotations:
.: {}
f:kubectl.kubernetes.io/last-applied-configuration: {}
manager: kubectl-client-side-apply
operation: Update
time: “2020-12-29T07:45:51Z”
name: nginx-config
namespace: default
resourceVersion: “574”
selfLink: /api/v1/namespaces/default/configmaps/nginx-config
uid: bc399247-fdd8-46ba-b49a-07b164587a27
the VolumeMount points to /var/www/html, same as in CM.
Tried to copy the File to Container with:
kubectl cp /tmp/index.php nginx-phpfpm:/var/www/html -c nginx-container
but still get failures:
thor@jump_host ~$ kubectl logs nginx-phpfpm -c nginx-container
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
127.0.0.1 - - [29/Dec/2020:07:53:20 +0000] “GET / HTTP/1.1” 404 27 “-” “curl/7.64.0”
2020/12/29 07:53:20 [error] 28#28: *1 FastCGI sent in stderr: “Primary script unknown” while reading response header from upstream, client: 127.0.0.1, server: _, request: “GET / HTTP/1.1”, upstream: “fastcgi://127.0.0.1:9000”, host: “localhost:8099”
I am really unsure whats the solution here so asking Community for help, may i really just overlooked a small piece but all help to understand this one is much appreciated.
