Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision | ||
|
linux_wiki:synchronize_time_using_other_ntp_peers [2016/10/08 17:41] billdozor |
linux_wiki:synchronize_time_using_other_ntp_peers [2019/05/25 23:50] (current) |
||
|---|---|---|---|
| Line 5: | Line 5: | ||
| Synchronizing time to a central time server and also keeping in sync with a peer server. | Synchronizing time to a central time server and also keeping in sync with a peer server. | ||
| - | This type of setup would be a tier two NTP setup, allowing for redundancy if the central source of time is lost. The two peers could agree on a time and provide it locally to other servers. | + | This type of setup is a tier two NTP setup, allowing for redundancy if the central source of time is lost. The two peers then agree on a time and provide it locally to other servers. |
| ---- | ---- | ||
| Line 18: | Line 18: | ||
| ---- | ---- | ||
| - | ====== NTP: Time Server ====== | + | ====== NTP: Central |
| Setting up the " | Setting up the " | ||
| * Server: ipa.example.com (192.168.1.152) | * Server: ipa.example.com (192.168.1.152) | ||
| + | * This server should already have ntpd installed and working if FreeIPA has been setup. | ||
| \\ | \\ | ||
| Line 67: | Line 68: | ||
| # On server2: Peer with server1 | # On server2: Peer with server1 | ||
| peer 192.168.1.150 | peer 192.168.1.150 | ||
| + | </ | ||
| + | |||
| + | \\ | ||
| + | Ensure that the firewall allows NTP in (on both server1 and server2) | ||
| + | <code bash> | ||
| + | firewall-cmd --permanent --add-service=ntp | ||
| + | firewall-cmd --reload | ||
| </ | </ | ||
| Line 86: | Line 94: | ||
| chronyc sources -v | chronyc sources -v | ||
| </ | </ | ||
| + | * Note: It may take a few minutes for the servers to enter a synced state on the peers. | ||
| ---- | ---- | ||