How to run a snapped application in the background after installation?

I have created a webapi application using dotnet and snapped with the below snapcraft.yaml file :

name: testsnap4
version: '0.1'
summary: A simple example snap for dotnet in snaps
description: A simple example snap for dotnet in snaps

grade: devel 
confinement: strict 

base: core

apps:
  test4:
command: IoT_AnalyticsCore.service

parts:
  test4:
source: .
plugin: dump
stage-packages:
    - libasn1-8-heimdal
    - libcurl3
    - libgssapi3-heimdal
    - libhcrypto4-heimdal
    - libheimbase1-heimdal
    - libheimntlm0-heimdal
    - libhx509-5-heimdal
    - libkrb5-26-heimdal
    - libldap-2.4-2
    - liblttng-ust0
    - libroken18-heimdal
    - librtmp1
    - libsasl2-2
    - libunwind8
    - liburcu4
    - libwind0-heimdal
    - icu-devtools
    - wget
    - zlib1g

and after installation i have to run the snap as below :

image

and now i want to run this in the background. How can i do it ??

I would want the snap to be started automatically as soon as i turn on my machine. Is there any way to achieve this ?

If you make your app a daemon with the daemon keyword it will automatically be run after snap installation and upon machine startup.

Try:

apps:
  test4:
  command: IoT_AnalyticsCore.service
  daemon: simple

(though note there are other values that daemon could take, see the docs at https://snapcraft.io/docs/snapcraft-app-and-service-metadata for more information)

2 Likes

Thanks for your response. I did the changes as below :

name: testsnap5
version: '0.1'
summary: A simple example snap for dotnet in snaps
description: A simple example snap for dotnet in snaps

grade: devel 
confinement: strict 

base: core

apps:
  test5:
    command: IoT_AnalyticsCore.service
    daemon: simple
    plugs:
    - network-bind
    - network

parts:
  test5:
    source: .
    plugin: dump
    stage-packages:
        - libasn1-8-heimdal
        - libcurl3
        - libgssapi3-heimdal
        - libhcrypto4-heimdal
        - libheimbase1-heimdal
        - libheimntlm0-heimdal
        - libhx509-5-heimdal
        - libkrb5-26-heimdal
        - libldap-2.4-2
        - liblttng-ust0
        - libroken18-heimdal
        - librtmp1
        - libsasl2-2
        - libunwind8
        - liburcu4
        - libwind0-heimdal
        - icu-devtools
        - wget
        - zlib1g

and then i directly try to launch the browser as below. But then it doesn’t work :frowning:

Have i missed adding something ?

What is the status of the service? Try snap services testsnap5

Also try checking the logs for your service with snap logs testsnap5

1 Like

Looking at your screenshot, you seem to be serving some files from your home folder. Snaps need all the assets to be included in them or you need to add a home interface to be able to access $HOME. The normal approach is to include the files in the snap.

1 Like

Thanks a lot for your help @ijohnson @jamesj . I sorted the issue with the help of logs. It was a missing file issue.