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I have a dockerfile and can't seem to be able to embed the nginx configuration file to it, so that it can be appended to /etc/nginx/nginx.conf.
I tried the following formats:
RUN cat <<EOT >> /etc/nginx/nginx.conf
user www;
worker_processes auto; # it will be determinate automatically by the number of core
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid; # it permit you to use /etc/init.d/nginx reload|restart|stop|start
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
sendfile on;
access_log /var/log/nginx/access.log;
keepalive_timeout 3000;
server {
listen 80;
root /usr/local/www;
index index.html index.htm;
server_name localhost;
client_max_body_size 32m;
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /var/lib/nginx/html;
}
}
}
EOT
and
RUN echo $
'user www; \n
worker_processes auto; # it will be determinate automatically by the number of core \n
error_log /var/log/nginx/error.log warn; \n
pid /var/run/nginx.pid; # it permit you to use /etc/init.d/nginx reload|restart|stop|start \n
events { \n
worker_connections 1024; \n
} \n
http { \n
include /etc/nginx/mime.types; \n
default_type application/octet-stream; \n
sendfile on; \n
access_log /var/log/nginx/access.log; \n
keepalive_timeout 3000; \n
server { \n
listen 80; \n
root /usr/local/www; \n
index index.html index.htm; \n
server_name localhost; \n
client_max_body_size 32m; \n
error_page 500 502 503 504 /50x.html; \n
location = /50x.html { \n
root /var/lib/nginx/html; \n
} \n
} \n
}'
> /etc/nginx/nginx.conf
However with either of the two examples I get the following error, which kinda looks like docker is trying to treat the nginx config file as its own variables:
Sending build context to Docker daemon 33.28 kB
Error response from daemon: Unknown instruction: WORKER_PROCESSES
Docker version is 1.13.1, build 07f3374/1.13.1 and the distro I am using is CentOS Atomic Host 7.1902, while docker base image is alpinelinux.
Thanks
243
With multi-stage builds, you use multiple FROM statements in your Dockerfile. Each FROM instruction can use a different base, and each of them begins a new stage of the build. You can selectively copy artifacts from one stage to another, leaving behind everything you don't want in the final image.
Each RUN command in a Dockerfile creates a new layer to the Docker image. In general, each layer should try to do one job and the fewer layers in an image the easier it is compress. This is why you see all these '&& 's in the RUN command, so that all the shell commands will take place in a single layer.
Dockerfile does not provide district multiline comments. The single-line comment sign, hash mark, can be used to create multiline comments in Dockerfile. Just put multiple lines of comments one after the others. This creates a multiline comment.
One approach to keeping Docker images small is using multistage builds. A multistage build allows you to use multiple images to build a final product. In a multistage build, you have a single Dockerfile, but can define multiple images inside it to help build the final image.
That should do the trick:
RUN echo $'first line \n\
second line \n\
third line' > /etc/nginx/nginx.conf
Basically it's wrapped in a $'' and uses \n\ for new lines.
173
I was looking to create & append lines to my .npmrc to install private packages. The only syntax that worked for me was:
RUN echo @myscope:registry=https://gitlab.com/api/v4/packages/npm/ > .npmrc \
&& echo //gitlab.com/api/v4/packages/npm/:_authToken=${MY_TOKEN} >> .npmrc \
&& echo strict-ssl=false >> .npmrc
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