After installed or upgraded to Oracle GI 12.1.0.2, chrony is not supported for some reason.
[grid@racnode2 bin]$ systemctl status chronyd
● chronyd.service - NTP client/server
Loaded: loaded (/usr/lib/systemd/system/chronyd.service; enabled;
vendor preset: enabled)
Active: active (running) since Fri 2020-01-10 16:28:40 AEDT;
1h 19min ago
Docs: man:chronyd(8)
man:chrony.conf(5)
Process: 1184 ExecStartPost=/usr/libexec/chrony-helper
update-daemon (code=exited, status=0/SUCCESS)
Process: 1152 ExecStart=/usr/sbin/chronyd $OPTIONS
(code=exited, status=0/SUCCESS)
Main PID: 1166 (chronyd)
CGroup: /system.slice/chronyd.service
└─1166 /usr/sbin/chronyd
[root@racnode2 bin]# ./crsctl check css CRS-4529: Cluster Synchronization Services is online [root@racnode2 bin]# ./crsctl check ctss CRS-4701: The Cluster Time Synchronization Service is in Active mode. CRS-4702: Offset (in msec): 0
[grid@racnode2 bin]$ crsctl stat res -t -init
-------------------------------------------------------------------
Name Target State Server State details
-------------------------------------------------------------------
Cluster Resources
-------------------------------------------------------------------
ora.asm
1 ONLINE ONLINE racnode2 Started,STABLE
ora.cluster_interconnect.haip
1 ONLINE ONLINE racnode2 STABLE
ora.crf
1 ONLINE ONLINE racnode2 STABLE
ora.crsd
1 ONLINE ONLINE racnode2 STABLE
ora.cssd
1 ONLINE ONLINE racnode2 STABLE
ora.cssdmonitor
1 ONLINE ONLINE racnode2 STABLE
ora.ctssd
1 ONLINE ONLINE racnode2 ACTIVE:0,STABLE
...
..
.
octssd.trc
2020-01-10 18:47:45.647193 : CTSS:1717679872: sclsctss_gvss2:
NTP default pid file not found
2020-01-10 18:47:45.647198 : CTSS:1717679872: ctss_check_vendor_sw:
Vendor time sync software is not detected. status [1].
CAUSE
It is a bug according oracle.
Workaround
Apply patch 20936562, which is included in majority GI PSUs since GI PSU 160719 (July 2016)
[grid@racnode2 tmp]$ opatch lsinventory | grep 20936562
19471836, 24445255, 20936562, 28805158, 25037011, 22144696, 18750781
[grid@racnode2 tmp]$ $ORACLE_HOME/OPatch/opatch lsinventory
...
..
.
Unique Patch ID: 22886676
Patch description: "OCW PATCH SET UPDATE 12.1.0.2.190716 (29509318)"
Created on 27 Jun 2019, 08:01:08 hrs PST8PDT
...
..
.
[grid@racnode2 trace]$ crsctl check css CRS-4529: Cluster Synchronization Services is online [grid@racnode2 trace]$ crsctl check ctss CRS-4700:The Cluster Time Synchronization Service is in Observer mode
[grid@racnode2 trace]$ crsctl stat res -t -init
-------------------------------------------------------------------
Name Target State Server State details
-------------------------------------------------------------------
Cluster Resources
------------------------------------------------------------------
ora.asm
1 ONLINE ONLINE racnode2 Started,STABLE
ora.cluster_interconnect.haip
1 ONLINE ONLINE racnode2 STABLE
ora.crf
1 ONLINE ONLINE racnode2 STABLE
ora.crsd
1 ONLINE ONLINE racnode2 STABLE
ora.cssd
1 ONLINE ONLINE racnode2 STABLE
ora.cssdmonitor
1 ONLINE ONLINE racnode2 STABLE
ora.ctssd
1 ONLINE ONLINE racnode2 OBSERVER,STABLE
...
..
.
octssd.trc
2020-01-10 20:52:58.219654 : CTSS:1530910464: sclsctss_gvss5:
Chrony active, forcing observer mode
2020-01-10 20:52:58.219657 : CTSS:1530910464: ctss_check_vendor_sw:
Vendor time sync software is detected. status [2].
Just keep in mind cluvfy still checks NTPD “/etc/ntp.conf” configurations. But it is not a big deal.
[grid@racnode2]$ cluvfy comp clocksync -n all -verbose
Verifying Clock Synchronization across the cluster nodes
Checking if Clusterware is installed on all nodes...
Oracle Clusterware is installed on all nodes.
Checking if CTSS Resource is running on all nodes...
Check: CTSS Resource running on all nodes
Node Name Status
------------------------------------ ------------------------
racnode2 passed
racnode1 passed
CTSS resource check passed
Querying CTSS for time offset on all nodes...
Query of CTSS for time offset passed
Check CTSS state started...
Check: CTSS state
Node Name State
------------------------------------ ------------------------
racnode2 Observer
racnode1 Observer
CTSS is in Observer state. Switching over to clock synchronization
checks using NTP
Starting Clock synchronization checks using Network Time Protocol(NTP)...
Checking existence of NTP configuration file "/etc/ntp.conf" across
nodes:
Node Name File exists?
------------------------------------ ------------------------
racnode2 no
racnode1 no
PRVG-1019 : The NTP configuration file "/etc/ntp.conf" does not exist
on nodes "racnode2,racnode1"
PRVF-5414 : Check of NTP Config file failed on all nodes.
Cannot proceed further for the NTP tests
Checking daemon liveness...
Check: Liveness for "ntpd"
Node Name Running?
------------------------------------ ------------------------
racnode2 no
racnode1 no
PRVF-7590 : "ntpd" is not running on node "racnode2"
PRVF-7590 : "ntpd" is not running on node "racnode1"
PRVG-1024 : The NTP Daemon or Service was not running on any of the
cluster nodes.
PRVF-5415 : Check to see if NTP daemon or service is running failed
Result: Clock synchronization check using Network Time Protocol(NTP)
failed
PRVF-9652 : Cluster Time Synchronization Services check failed
Verification of Clock Synchronization across the cluster nodes was
unsuccessful on all the specified nodes.
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