Application assignment

Introduction

It is currently not technically possible to automatically assign host processes and their services to a software application. Versio.io allows customers to define the application context for processes and services in an environment variable VERSIO_APPLICATION_ID.

The environment variable for application assignment can be defined at the following levels: * Host level - application mapping applies to all processes and services on the host. The assignment on host level is only conditionally recommended, because all captured host processes and services are assigned to an application by Versio.io (too rough). * Process level - application mapping applies to the process instance and all services provided by it. * Shell/Bash level - application mapping applies to all processes and services in the dedicated execution context.

Configuration

The mapping is done in a defined format Application(Service), which for simplicity is illustrated in the following table in the form of examples. Specifying services reduces the mapping to an application only for the specified services. For example, the databases of a database management system can be assigned to different applications.

Workaround NGINX

By default, nginx removes all environment variables inherited from its parent process except the TZ variable. (https://nginx.org/en/docs/ngx_core_module.html)

This means that the VERSIO_APPLICATION_ID environment variable is not available even if it has been set.

To automatically assign the NGINX to the application anyway, the environment variable can be entered in the /etc/nginx/versio-io.env file.

Topology example

The following topology shows an example of how processes and specific services have been assigned to an application.

Figure:Example topology for which the processes and services are assigned to an application

Integration examples

Shell script or batch file

export VERSIO_APPLICATION_ID="crm.my-domain.com"
bash my-app

Docker

docker run -d -e VERSIO_APPLICATION_ID="crm.my-domain.com" my-docker-image:latest

Docker compose

version: "3"

services:
  crm:
    image: mycrm/mycrm:latest
    environment:
      - VERSIO_APPLICATION_ID="crm.my-domain.com"
    ports:
      - 443:443

Linux systemd service

[UNIT]
...

[Service]
Environment="VERSIO_APPLICATION_ID=crm.my-domain.com"
...

[INSTALL]
...