Hosts File
The jtel system uses aliases to reference the other machines in the installation. This removes all dependencies to cryptic host names, and customer DNS servers.
The hosts file must be provided on each system, and should contain aliases pointing to the following machines (red entries are not required).
| Alias | Signifies | Single DB Installation | Master-Slave Installation | Redundant Master-Master Installation |
|---|---|---|---|---|
| acd-dbm | Database Master | The database machine. | The database master. | The Load Balancer Virtual Shared IP Address. |
| acd-dbm1 | First Database Master | The first database master. | ||
| acd-dbm2 | Second Database Master | The second database master. | ||
| acd-dbs | Database Slave | The database machine. | The database slave. | The Load Balancer Virtual Shared IP Address. |
| acd-dbs1 | First Database Slave | The first database slave. | ||
| acd-dbs2 | Second Database Slave | The second database slave. | ||
| acd-dbr | Reporting Database | The database machine. | The database slave. | The Load Balancer Virtual Shared IP Address. |
| acd-lb | The Load Balancer | The Load Balancer | The Load Balancer | The Load Balancer Virtual Shared IP Address. |
| acd-store | The File Storage | The Load Balancer | The Load Balancer | The Load Balancer Virtual Shared IP Address. |
acd-tel1 | The Telephony Machine(s) Numbered from 1 ... N | The Telephony Machine(s) Numbered from 1 ... N | The Telephony Machine(s) Numbered from 1 ... N | The Telephony Machine(s) Numbered from 1 ... N |
acd-jb1 | The Webserver Machine(s) Numbered from 1 ... N | The Webserver Machine(s) Numbered from 1 ... N | The Webserver Machine(s) Numbered from 1 ... N | The Webserver Machine(s) Numbered from 1 ... N |
The hosts file is located in: /etc/hosts on linux, and c:\Windows\system32\drivers\etc\hosts on windows.
Note, under windows you must be in an elevated command prompt or run the editor in elevated mode to edit the file.
Under linux, you will need to edit the file with sudo, or as root.
Examples
The following lines should be added to the files in each case.
Note, that windows does not need entries for localhost, whereas linux does.
You should not touch these parts of the file - just add entries to the end.
Example Hosts File Single DB
10.0.0.1 acd-lb 10.0.0.1 acd-store 10.0.0.11 acd-dbm 10.0.0.11 acd-dbs 10.0.0.11 acd-dbr 10.0.0.31 acd-tel1 10.0.0.41 acd-jb1 10.0.0.42 acd-jb2
Example Hosts File Master-Slave
10.0.0.1 acd-lb 10.0.0.1 acd-store 10.0.0.11 acd-dbm 10.0.0.21 acd-dbs 10.0.0.21 acd-dbr 10.0.0.31 acd-tel1 10.0.0.41 acd-jb1 10.0.0.42 acd-jb2
Example Hosts File Redundant
10.0.0.1 acd-dbm 10.0.0.1 acd-dbs 10.0.0.1 acd-dbr 10.0.0.1 acd-lb 10.0.0.1 acd-store 10.0.0.11 acd-dbm1 10.0.0.12 acd-dbm2 10.0.0.21 acd-dbs1 10.0.0.22 acd-dbs2 10.0.0.31 acd-tel1 10.0.0.32 acd-tel2 10.0.0.41 acd-jb1 10.0.0.42 acd-jb2 10.0.0.43 acd-jb3 10.0.0.44 acd-jb4