Docker build logs unreadable

[frederikhors]

I'm on caprover v1.11.0 and I'm using this CLI command:

caprover deploy --caproverUrl https://captain.domain --caproverApp appName --tarFile tarName

It works but the Docker build logs are like the below both in my console and on captain's app's dashboard "Deployment" tab:

   Compiling either v1.9.0              
                                        
   Compiling sha1 v0.10.5               
                                        
   Compiling indexmap v1.9.3            
                                        
   Compiling minimal-lexical v0.2.1     
                                        
Compiling                               
                                        
base64                                  
 v                                      
0                                       
.                                       
21                                      
.                                       
3

.                                                             
14                                                            
.ompiling                                                     
0                                                             
ignore                                                        
 v                                                            
   Compiling tokio-util v0.12.2                                  
.                                                             
                                                              
 0                                                            
Compiling                                                     
                                                              
hyper                                                         
 v                                                            
0                                                             
.ompiling                                                     
14                                                            
.lap_derive                                                   
27                                                            
4                                                             
.                                                             
                                                              
 Compiling                                                    
                                                              
tower-service v                                           
0                                                             
.12                                                           
.                                                             
2ompiling                                                     
                                                              
 lap_builder                                                  
 v                                                            
                                                              
Compiling                                                     
                                                              
common                                                        
 v                                                            
0                                                             
.                                                             
0                                                             
.                                                             
1                                                             
 (mpiling                                                     
/common                                      
)oml                                                          
 v                                                            
0                                                             
   Compiling router v0.0.1 (/src/router)      
7                                                             
.                                                             
8                                                             
                                                              
                                                              
[[ TRUNCATED ]]                                               
1               
          Compiling
   Compiling tokio-util v0.7.8                                    

and so on...

It's unreadable to say the least.

Why?

Is the Docker logs system?

Can we use the --progress plain argument on the docker build command? How?

[githubsaturn]

It is the docker build output.
https://github.com/caprover/caprover/blob/master/src/docker/DockerApi.ts#L628-L631

Does it happen for all builds a particular image? Can you try a simply build like this:

FROM node:18
RUN npm i -g caprover
CMD sleep 10d

This should generate some output in your logs and it should be perfectly normal.

[frederikhors]

I used method 4.

The build logs:

------------------------- Sat Sep 16 2023 11:01:59 GMT+0000 (Coordinated Universal Time)
Build started for amazing-app
Ignore warnings for unconsumed build-args if there is any
Step 1/3 : FROM node:18

---> c9cdd0572143
Step 2/3 : RUN npm i -g caprover

---> Running in a3a5e5009906
npm WARN deprecated
 [email protected]: this library is no longer supported

npm WARN deprecated [email protected]: request-promise has been deprecated because it extends the now deprecated request package, see https://github.com/request/request/issues/3142

npm WARN deprecated [email protected]: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.

npm WARN deprecated [email protected]: request has been deprecated, see https://github.com/request/request/issues/3142

added 200 packages in 10s
9 packages are looking for funding
  run `npm fund` for details
npm notice 
npm 
notice New major version of npm available! 9.6.7 -> 10.1.0
npm
 notice
 Changelog: <https://github.com/npm/cli/releases/tag/v10.1.0>
npm notice Run `npm install -g [email protected]` to update!
npm
 
notice
 

Removing intermediate container a3a5e5009906
---> 2c7522fa7055
Step 3/3 : CMD sleep 10d

---> Running in d63d245a4a10
Removing intermediate container d63d245a4a10
---> 62b3c622904f
Successfully built 62b3c622904f
Successfully tagged img-captain-amazing-app:latest
Build has finished successfully!

This is normal as you said.

Is there a way we can fix this?

I fixed this temporarily using docker build manually via ssh.

Hence the issue #1883.

[githubsaturn]

So looks like your container's build process is somehow throwing some garbage character into the logs.... It's apparently specific to your build. If you can share a sample Dockerfile that reproduces the issue, I can look into that.

[frederikhors]

It's a rust build. I cannot share unfortunately. Anyway I found a workaround. Thank you very much (for now).