ASP.NET Core Angular app fails to run on Ubuntu 16.04 with Nginx and Systemd - linux

Question

I have an ASP.NET Core Angular application targeting dotnet 1.1.0.
I installed Nginx on my Linux Ubuntu 16.04 and configured the nginx confog file as follows:
server {
listen 80;
location / {
proxy_pass http://localhost:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
}
and myapp.services file as follows:
[Unit]
Description=Sample application.
[Service]
Type=simple
WorkingDirectory=/var/myappfolder
ExecStart=/usr/bin/dotnet /var/myappfolder/myapp.dll
#User=web
[Install]
WantedBy=multi-user.target
I tested this set up with a simple sample app and it worked fine. However as soon as I deploy my proper app to /var/myappfolder and configure
systemclt start mywebsite
systemclt daemon_reload
and then check
systemclt status mywebsite
I get this error:
jtrade.service - Sample application. Loaded: loaded
(/lib/systemd/system/jtrade.service; disabled; vendor preset: enabled)
Active: failed (Result: signal) since Wed 2017-08-30 18:08:08 UTC; 9s
ago Process: 4640 ExecStart=/usr/bin/dotnet /var/jtrade/jtradep.dll
(code=killed, signal=ABRT) Main PID: 4640 (code=killed, signal=ABRT)
Aug 30 18:08:08 localhost dotnet[4640]: at
Microsoft.DotNet.Configurer.NuGetCacheSentinel.get_NuGetCachePath()
Aug 30 18:08:08 localhost dotnet[4640]: at
Microsoft.DotNet.Configurer.NuGetCacheSentinel.Exists()
Aug 30 18:08:08 localhost dotnet[4640]: at
Microsoft.DotNet.Configurer.DotnetFirstTimeUseConfigurer.ShouldPrimeNugetCache()
Aug 30 18:08:08 localhost dotnet[4640]: at
Microsoft.DotNet.Configurer.DotnetFirstTimeUseConfigurer.Configure()
Aug 30 18:08:08 localhost dotnet[4640]: at
Microsoft.DotNet.Cli.Program.ConfigureDotNetForFirstTimeUse(INuGetCacheSentinel
nugetCacheSentinel)
Aug 30 18:08:08 localhost dotnet[4640]: at
Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, ITelemetry
telemetryClient)
Aug 30 18:08:08 localhost dotnet[4640]: at
Microsoft.DotNet.Cli.Program.Main(String[] args)
Aug 30 18:08:08 localhost systemd[1]: jtrade.service: Main process
exited, code=killed, status=6/ABRT
Aug 30 18:08:08 localhost systemd[1]: jtrade.service: Unit entered
failed state.
Aug 30 18:08:08 localhost systemd[1]: jtrade.service: Failed with
result 'signal'.
So I dived deeper into debugging this error with journalctl -u myappname and got some more useful info:
Started Sample application..
Aug 31 05:13:34 localhost dotnet[10290]: Unhandled Exception:
System.InvalidOperationException: Required environment variable 'HOME'
is not set. Try setting 'HOME' and running the operation again.
Aug 31 05:13:34 localhost dotnet[10290]: at
NuGet.Common.NuGetEnvironment.GetValueOrThrowMissingEnvVar(Func`1
getValue, String name)
Aug 31 05:13:34 localhost dotnet[10290]: at
NuGet.Common.NuGetEnvironment.GetHome() Aug 31 05:13:34 localhost
dotnet[10290]: at
NuGet.Common.NuGetEnvironment.<>c.<.cctor>b__12_0()
Aug 31 05:13:34 localhost dotnet[10290]: at
System.Lazy`1.CreateValue()
Aug 31 05:13:34 localhost dotnet[10290]: --- End of stack trace from
previous location where exception was thrown ---
Aug 31 05:13:34 localhost dotnet[10290]: at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
Aug 31 05:13:34 localhost dotnet[10290]: at
System.Lazy`1.get_Value()
Aug 31 05:13:34 localhost dotnet[10290]: at
NuGet.Common.NuGetEnvironment.GetFolderPath(SpecialFolder folder)
Aug 31 05:13:34 localhost dotnet[10290]: at
NuGet.Common.NuGetEnvironment.GetFolderPath(NuGetFolderPath folder)
Aug 31 05:13:34 localhost dotnet[10290]: at
NuGet.Configuration.SettingsUtility.GetGlobalPackagesFolder(ISettings
settings)
Aug 31 05:13:34 localhost dotnet[10290]: at
NuGet.Configuration.NuGetPathContext.Create(ISettings settings)
Aug 31 05:13:34 localhost dotnet[10290]: at
Microsoft.DotNet.Configurer.NuGetCacheSentinel.get_NuGetCachePath()
Aug 31 05:13:34 localhost dotnet[10290]: at
Microsoft.DotNet.Configurer.NuGetCacheSentinel.Exists()
Aug 31 05:13:34 localhost dotnet[10290]: at
Microsoft.DotNet.Configurer.DotnetFirstTimeUseConfigurer.ShouldPrimeNugetCache()
Aug 31 05:13:34 localhost dotnet[10290]: at
Microsoft.DotNet.Configurer.DotnetFirstTimeUseConfigurer.Configure()
Aug 31 05:13:34 localhost dotnet[10290]: at
Microsoft.DotNet.Cli.Program.ConfigureDotNetForFirstTimeUse(INuGetCacheSentinel
nugetCacheSentinel)
Aug 31 05:13:34 localhost dotnet[10290]: at
Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, ITelemetry
telemetryClient)
Aug 31 05:13:34 localhost dotnet[10290]: at
Microsoft.DotNet.Cli.Program.Main(String[] args)
Aug 31 05:13:34 localhost systemd[1]: jtrade.service: Main process
exited, code=killed, status=6/ABRT
Aug 31 05:13:34 localhost systemd[1]: jtrade.service: Unit entered
failed state.
Aug 31 05:13:34 localhost systemd[1]: jtrade.service: Failed with
result 'signal'.
From here if I run to see my environment variables with printenv, I find that HOME= /root
Maybe it should be set to something else?

Answer 1

Apparently I just wrote
Environment=HOME=/root
in the .service file and everything started working