Non-zero code: 1 – convert docker error into warning

Problem: returned a non-zero code: 1

It can be a bit frustrating to see the following Docker error:

The command ‘/bin/sh -c rm /etc/nginx/conf.d/default.conf’ returned a non-zero code: 1

Solution: ;exit 0

However if you find yourself stalled out with this error, you might try converting this into a warning by adding ‘; exit 0’ to the end of your RUN command:

In this example we don’t care about a docker error for a non-zero return in subsequent builds. Make sure that before you do this, you understand what it is you are ignoring and if there is not a deeper underlying problem.

FROM nginx:latest

# Remove default configuration files
RUN rm /etc/nginx/conf.d/default.conf; exit 0

# Copy our custom config files to Nginx Contatiner
COPY nginx.conf /etc/nginx
COPY site.conf /etc/nginx/conf.d

Now when we build we still see the warning, but the Docker build continues:

[user@computer project]$ docker build -t nginx nginx
Sending build context to Docker daemon  5.632kB
Step 1/4 : FROM nginx:latest
 ---> 0c3656469914
Step 2/4 : RUN rm /etc/nginx/conf.d/default.conf; exit 0
 ---> Running in 2cc792ecba71
rm: cannot remove '/etc/nginx/conf.d/default.conf': No such file or directory
 ---> 8127ca93feba
Removing intermediate container 2cc792ecba71
Step 3/4 : COPY nginx.conf /etc/nginx
 ---> 27799064636b
Removing intermediate container 1ff675e77a27
Step 4/4 : COPY site.conf /etc/nginx/conf.d
 ---> b36c3bce3498
Removing intermediate container fb7f2970fbf6
Successfully built b36c3bce3498
Successfully tagged nginx:latest

The world is right, time for a happy dance!

non-zero code: 1 happy_dance_small

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