Trying to copy over a nginx conf file for my pod to use (lives at <project>/nginx.conf). With Docker compose I'd simply do the following...
image: "nginx:alpine"
ports:
- "80:80"
volumes:
- ./nginx.conf:/etc/nginx/conf.d/default.confBest practice? Unsure as this is new-ish to me. It did seemingly work well. I'd like to accomplish the same with a kubernetes deployment but am not finding a straightforward way to do this declaratively. I came across a bit on ConfigMap, but was a little resistant when immediately met with the following...
Use the kubectl create configmap command to create configmaps from directories, files, or literal values
I don't want a lot of remember-these-commands-down-the-roads' scattered in text files and much prefer the file approach as shown with compose. Is this achievable? My spec so far looks as such...
spec:
containers:
- name: nginx
image: nginx:alpine
ports:
- containerPort: 80
name: httpHelp me the get config in here?
ConfigMaps are absolutely the way to go. You can create a configmap using a spec like the following:
apiVersion: v1
kind: ConfigMap
metadata:
name: nginx
namespace: default
data:
nginx.conf: |-
user www;
worker_processes 5;
...
# all nginx.conf file contents goes here
Once you applied your configmap using kubectl, you can mount it in your container, by specifying the following in the PodSpec:
containers:
- name: ...
...
volumeMounts:
- name: nginx-volume
mountPath: <path where you want to put nginx.conf>
volumes:
- name: nginx-volume
configMap:
name: nginxPlease note that the directory you will choose as a mount point for your nginx.conf file will contain only that file (hiding all other files already present in that directory), exactly as it happens when mounting a device on a non empty directory in linux.
A lot more details on configmaps here: https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/