[SOLVED] Apache and then Nginx won't start after issuing Let's Encrypt certificate

[vlahonick]

After I issue a Let's Encrypt certificate (for any of my domains) then the apache won't start. At first when I typed in cli

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systemctl status apache2.service

the problem was

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(98)Address already in use: make_sock: could not bind to address [::]:80
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80

I killed the process occupying the sock (for some reason it was nginx) but then again I couldn't start apache.

Now (after killing nginx) I get the following error

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apache2.service - LSB: Apache2 web server
Loaded: loaded (/etc/init.d/apache2)
Active: active (exited) (Result: exit-code) since Tue 2015-12-15 20:09:49 EET; 22min ago
Process: 3545 ExecStop=/etc/init.d/apache2 stop (code=exited, status=0/SUCCESS)
Process: 8299 ExecReload=/etc/init.d/apache2 reload (code=exited, status=1/FAILURE)
Process: 3555 ExecStart=/etc/init.d/apache2 start (code=exited, status=0/SUCCESS)

Dec 15 20:24:15 my-domain apache2[5039]: Reloading web server: apache2.
Dec 15 20:24:15 my-domain systemd[1]: Reloaded LSB: Apache2 web server.
Dec 15 20:31:47 my-domain systemd[1]: Started LSB: Apache2 web server.
Dec 15 20:31:51 my-domain systemd[1]: Started LSB: Apache2 web server.
Dec 15 20:32:12 my-domain systemd[1]: Started LSB: Apache2 web server.
Dec 15 20:32:14 my-domain systemd[1]: Reloading LSB: Apache2 web server.
Dec 15 20:32:14 my-domain apache2[8299]: Reloading web server: apache2 failed!
Dec 15 20:32:14 my-domain apache2[8299]: Apache2 is not running ... (warning).
Dec 15 20:32:14 my-domain systemd[1]: apache2.service: control process exited, code=exited status=1
Dec 15 20:32:14 my-domain systemd[1]: Reload failed for LSB: Apache2 web server.

I tried everything, from reissuing the certificates to killing the processes one by one. Nothing worked until now.

If I kill apache now I can reload/restart it but then I get the following error when I try to reload nginx.

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nginx.service - LSB: Stop/start nginx
Loaded: loaded (/etc/init.d/nginx)
Active: failed (Result: exit-code) since Thu 2015-12-17 22:22:32 EET; 53s ago
Process: 17152 ExecStop=/etc/init.d/nginx stop (code=exited, status=0/SUCCESS)
Process: 16689 ExecReload=/etc/init.d/nginx reload (code=exited, status=0/SUCCESS)
Process: 17191 ExecStart=/etc/init.d/nginx start (code=exited, status=1/FAILURE)

Dec 17 22:22:30 my-domain nginx[17191]: nginx: [emerg] bind() to MY-IP-GOES-HERE failed (98: Address already in use)
Dec 17 22:22:30 my-domain nginx[17191]: nginx: [emerg] bind() to MY-IP-GOES-HERE failed (98: Address already in use)
Dec 17 22:22:31 my-domain nginx[17191]: nginx: [emerg] bind() to MY-IP-GOES-HERE failed (98: Address already in use)
Dec 17 22:22:31 my-domain nginx[17191]: nginx: [emerg] bind() to MY-IP-GOES-HERE failed (98: Address already in use)
Dec 17 22:22:32 my-domain nginx[17191]: nginx: [emerg] bind() to MY-IP-GOES-HERE failed (98: Address already in use)
Dec 17 22:22:32 my-domain nginx[17191]: nginx: [emerg] still could not bind()
Dec 17 22:22:32 my-domain systemd[1]: nginx.service: control process exited, code=exited status=1
Dec 17 22:22:32 my-domain systemd[1]: Failed to start LSB: Stop/start nginx.
Dec 17 22:22:33 my-domain systemd[1]: Unit nginx.service entered failed state.
Dec 17 22:23:18 my-domain systemd[1]: Unit nginx.service cannot be reloaded because it is inactive.

[vlahonick]

The issue appears to be due to a broken Let's Encrypt installation. After some experimenting I did clean and successfully install of apache2 + vesta + let's encrypt and everything worked as designed.