Dear K8S community Team,
I am getting this error message from nginx when I deploy my application pod. My application an angular6 app is hosted inside an nginx server, which is deployed as a docker container inside EKS.
I have my application configured as a “read-only container filesystem”, but I am using “ephemeral mounted” volume of type “emptyDir” in combination with a read-only filesystem.
So I am not sure the reason of this following error:
2019/04/02 14:11:29 [emerg] 1#1: mkdir() "/var/cache/nginx/client_temp" failed (30: Read-only file system) nginx: [emerg] mkdir() "/var/cache/nginx/client_temp" failed (30: Read-only file system)
My deployment.yaml is:
...
spec:
volumes:
- name: tmp-volume
emptyDir: {}
# Pod Security Context
securityContext:
fsGroup: 2000
containers:
- name: {{ .Chart.Name }}
volumeMounts:
- mountPath: /tmp
name: tmp-volume
image: "{{ .Values.image.name }}"
imagePullPolicy: {{ .Values.image.pullPolicy }}
securityContext:
capabilities:
add:
- NET_BIND_SERVICE
drop:
- ALL
securityContext:
readOnlyRootFilesystem: true
ports:
- name: http
containerPort: 80
protocol: TCP
...nginx.conf is:
...
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Turn off the bloody buffering to temp files
proxy_buffering off;
sendfile off;
keepalive_timeout 120;
server_names_hash_bucket_size 128;
# These two should be the same or nginx will start writing
# large request bodies to temp files
client_body_buffer_size 10m;
client_max_body_size 10m;
...
Seems like your nginx is not running as root user.
Since release 1.12.1-r2, nginx daemon is being run as user 1001.
1.12.1-r2
The nginx container has been migrated to a non-root container approach. Previously the container run as root user and the nginx daemon was started as nginx user. From now own, both the container and the nginx daemon run as user 1001. As a consequence, the configuration files are writable by the user running the nginx process.
This is why you are unable to bind on port 80, it's necessary to use port > 1000.
You should use:
ports:
- '80:8080'
- '443:8443'and edit the nginx.conf so it listens on port 8080:
server {
listen 0.0.0.0:8080;
...
Or run nginx as root: command: [ "/bin/bash", "-c", "sudo nginx -g 'daemon off;'" ]