can not modify /etc/nginx/conf.d/default.conf (read-only file system?)

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I'm trying to deploy an Angular application onto Openshift (i.e an angular docker container on Openshift). However, I'm facing difficulty modifying the default.conf file within nginx in the container, which I think also caused the error at line 9.

Here's the error log on Openshift: enter image description here

Here's my dockerfile:

FROM node:latest as build
WORKDIR /usr/local/app
COPY ./ /usr/local/app/
RUN npm install
RUN npm run build

FROM nginxinc/nginx-unprivileged
COPY --from=build /usr/local/app/dist/ng-adminx /usr/share/nginx/html
COPY --from=build /usr/local/app/nginx.conf /etc/nginx/conf.d/default.conf
EXPOSE 80

For context,

  1. I'm not familiar with how permissions work on Openshift.
  2. Also, this build works perfectly fine locally but fails on Openshift.

I think chmod or chown might be the solution. Would greatly appreciate any suggestion on how I should modify my dockerfile or navigate this! Thanks!

openshift docker nginx
1 Answers

You will need to use chmod to be able to modify the default.conf file.

For simplicity, you can use chmod 777 <filepathname>.

How does 777 come about? You can think of it as the permissions for read, write, execute for file owner, group and user respectively. 1 = allowed. 0 = not allowed.

So 7 in binary is 111.

file owner group other users
rwx rwx rwx
111 111 111
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