Docker build is not able to run apk

Questions
1

Describe the problem/error/question

I am following the instructions of this page to create a custom image of n8n:

Like suggested this is my dockerfile:

FROM docker.n8n.io/n8nio/n8n
RUN apk --update add curl

But the build does not complete.

What is the error message (if any)?

=> ERROR [2/2] RUN apk --update add curl                                                                                                                                    0.3s
------                                                                                                                                                                            
 > [2/2] RUN apk --update add curl:
#0 0.206 ERROR: Unable to lock database: Permission denied
#0 0.207 ERROR: Failed to open apk database: Permission denied
------
Dockerfile:2
--------------------
   1 |     FROM docker.n8n.io/n8nio/n8n
   2 | >>> RUN apk --update add curl
--------------------
ERROR: failed to solve: process "/bin/sh -c apk --update add curl" did not complete successfully: exit code: 99

For your info, I am trying to build an image for ARM processor, but I assume the image for both processors should behave the same.

2

It looks like your topic is missing some important information. Could you provide the following if applicable.

  • n8n version:
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app):
  • Operating system:
3

Hey @Martin_Neumann,

It is likely to be the user, try the below and see if that works.

FROM docker.n8n.io/n8nio/n8n
USER root
RUN apk --update add curl
USER node
4

Thanks, that worked. Can you update the documentation on the link above, so that the next person does not need to ask for this solution?

5

Popped in a PR to update it which can be found below.