![]() Wed Feb 2 04:22:52 2022 Normal: recursive startup rsync: /tmp/test/ -> Permanently added ':6765,:6765' (ECDSA) to the list of known hosts. settings Īnd after 4 hours of wandering: Wed Feb 2 04:22:52 2022 Normal: - Startup, daemonizing. Open /etc/nf and comment out the default configuration using - at the beginning of the line and add below configuration to the file. Generate ssh-key in both the servers and add to authorized_keys file. # yum -y install lua lua-devel pkgconfig gcc asciidoc lsyncd Install below packages on both the servers. There is a good tool called lsyncd to sync files between multiple servers on real time basis. May 01 22:35:04 RHEL chronyd: Selected source File synchronisation between multiple servers in multi master mode May 01 22:35:02 RHEL chronyd: System clock was stepped by 4.158287 seconds May 01 22:34:58 RHEL chronyd: System clock wrong by 4.158287 seconds, adjustment started May 01 22:34:58 RHEL chronyd: System clock TAI offset set to 37 seconds May 01 22:34:53 RHEL systemd: Started NTP client/server. May 01 22:34:53 RHEL chronyd: Using right/UTC timezone to obtain leap second data May 01 22:34:53 RHEL chronyd: chronyd version 3.5 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SC> May 01 22:34:53 RHEL systemd: Starting NTP client/server. Process: 4579 ExecStart=/usr/sbin/chronyd $OPTIONS (code=exited, status=0/SUCCESS) Process: 4607 ExecStartPost=/usr/libexec/chrony-helper update-daemon (code=exited, status=0/SUCCESS) Download DAEMON Sync for Linux Remember that it’s the server you download for your desktop. Of course, you can set it to sync only when you initiate the process. Loaded: loaded (/usr/lib/systemd/system/rvice enabled vendor preset: enabled)Īctive: active (running) since Fri 22:34:53 WAT 24s ago DAEMON Sync is more of a backup tool than a sync tool because it instead of constantly checking for file differences to sync across, it makes use of configurable time intervals. Verify if the NTP service has started by checking the status of chronyd service ~]# systemctl status rvice # Get TAI-UTC offset and leap seconds from the system tz database.Ħ. # Specify file containing keys for NTP authentication. # Serve time even if not synchronized to a time source. # Allow NTP client access from local network. # Increase the minimum number of selectable sources required to adjust # Enable hardware timestamping on all interfaces that support it. # Enable kernel synchronization of the real-time clock (RTC). # Allow the system clock to be stepped in the first three updates # Record the rate at which the system clock gains/losses time. It can be seen after chrony is installed. The chrony configuration file can be found in the path “/etc/nf” on a RHEL 7/8 server and some other distributions. It is not a doubt that there are differences between the two even if their configuration files are almost similar,You may want to click the link below to check their differences. Well, you may drop your perspective with regard to this in the comment section. Some agreed ntp is better than chrony in many ways while some disagreed. There have been a lot of controversial discussions as regards why ntp was joined with chrony in RHEL 7 and finally deprecated in RHEL 8. The chronyd daemon must be up and running on the system before there can be synchronization. ![]() In old distributions of RHEL servers and some other distributions, the ntpd daemon with the “ntpdate” tool is the client that is used to synchronize the time of a Linux system over a network from the NTP server, but in newer versions of RHEL and some other distributions, “ntpdate” tool /ntpd daemon has been deprecated and the new NTP client responsible for NTP time synchronization from the NTP server is chrony. Some clustered environment prefers to have an internal central NTP server configured so that other systems in the environment will synchronize time from it. ![]() There are a few numbers of NTP server pool, a Linux OS by default knows how to use the one closer to the region that is selected during the installation of the operating system. NTP is server/client based, whereby NTP servers are sitting somewhere as a pool of servers in different zones and regions and NTP client will be configured on a Linux system to synchronize time from an NTP server. Network time protocol (NTP) is a protocol that is used to automatically synchronize time over a network.
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