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. | ||
---- | ---- | ||