Debian 9.7 - missing sysvinit support

[Pls]

Found pretty much same issue about this #35, but opening new one as it's closed and can't be re-opened easily.

Describe the problem

Can't install do-agent on Debian 9.7 with sysvinit ini system.

Steps to reproduce

Have Debian 9.7 with sysvinit and try to install do-agent. Throws this error:

boa:~# sudo ./install.sh 
Cleaning up old sources...OK
Verifying machine compatability...OK
Verifying compatability with script...OK
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package 'do-agent' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Installing apt repository...
Installing gpg key...OK
Selecting previously unselected package do-agent.
(Reading database ... 70509 files and directories currently installed.)
Preparing to unpack .../do-agent_3.5.5_amd64.deb ...
Unpacking do-agent (3.5.5) ...
Setting up do-agent (3.5.5) ...
Detecting SELinux
SELinux not enforced
Unknown init system. Exiting...
dpkg: error processing package do-agent (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 do-agent
E: Sub-process /usr/bin/dpkg returned an error code (1)

Expected behavior

do-agent should support all init systems - systemd, sysvinit, upstart. Seems that it's only supporting systemd and upstart. It is seen when viewing this code part -

do-agent/packaging/scripts/after_install.sh

Line 24 in 7977cee

if command -v systemctl >/dev/null 2>&1; then

System Information

Distribution and version: Debian 9.7 x64

do-agent information:

/opt/digitalocean/bin/do-agent --version:

boa:~# /opt/digitalocean/bin/do-agent --version

do-agent (DigitalOcean Agent)

Version:     3.5.5
Revision:    8fe5d9e
Build Date:  Thu Aug  1 17:36:22 UTC 2019
Go Version:  go1.12.1
Website:     https://github.com/digitalocean/do-agent

Copyright (c) 2019 DigitalOcean, Inc. All rights reserved.

This work is licensed under the terms of the Apache 2.0 license.
For a copy, see <https://www.apache.org/licenses/LICENSE-2.0.html>.

apt-cache policy do-agent:

boa:~# apt-cache policy do-agent
do-agent:
  Installed: 3.5.5
  Candidate: 3.5.5
  Version table:
 *** 3.5.5 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
        100 /var/lib/dpkg/status
     3.5.4 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     3.5.2 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     3.5.1 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     3.3.1 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     3.2.1 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     3.0.5 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     2.2.4 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     2.2.3 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     2.2.1 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     2.2.0 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     2.1.3 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     2.0.2 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     2.0.1 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     2.0.0 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages
     1.1.3 500
        500 http://repos.insights.digitalocean.com/apt/do-agent main/main amd64 Packages

[Danyc0]

I'm having exactly the same issue on Debian 10.1 with sysvinit, +1

[dariosusman]

Still going on on Debian 10.4 with sysvinit.

[dariosusman]

Hi!
This is still on going! And I don't want to use systemd :\