{"id":15413,"date":"2020-12-18T16:46:44","date_gmt":"2020-12-18T15:46:44","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/ntp-is-not-working-for-oda-new-deployment-reimage-in-version-19-8\/"},"modified":"2020-12-18T16:46:44","modified_gmt":"2020-12-18T15:46:44","slug":"ntp-is-not-working-for-oda-new-deployment-reimage-in-version-19-8","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/ntp-is-not-working-for-oda-new-deployment-reimage-in-version-19-8\/","title":{"rendered":"NTP is not working for ODA new deployment (reimage) in version 19.8?"},"content":{"rendered":"<p>Having recently reimaged and patched several ODA in version 19.8 and 19.9, I could see an issue with NTP. During my troubleshooting I could determine the root cause and find appropriate solution. Through this blog I would like to share my experience with you.<\/p>\n<p><!--more--><\/p>\n<h3>Symptom\/Analysis<\/h3>\n<p>ODA version 19.6 or higher is coming with Oracle Linux 7. Since Oracle Linux 7 the default synchronization service is not ntp any more but chrony. In Oracle Linux 7, ntp is still available and can still be used. But ntp service will disappear in Oracle Linux 8.<\/p>\n<p>What I could realize from my last deployments and patching is that :<\/p>\n<ul>\n<li>Patching your ODA to version 19.8 or 19.9 from 19.6 : The system will still use ntpd and chronyd service will be deactivated. All is working fine.<\/li>\n<li>You reimage your ODA to version 19.8 : chronyd will be activated and NTP will not work any more.<\/li>\n<li>You reimage your ODA to version 19.9 : ntpd will be activated and NTP will be working with no problem.<\/li>\n<\/ul>\n<p>So the problem is only if you reimage your ODA to version 19.8.<\/p>\n<h3>Problem explanation<\/h3>\n<p>The problem is due to the fact that the odacli script deploying the appliance will still update the ntpd configuration (\/etc\/ntpd.conf) with the IP address provided and not chronyd. But chronyd will be, by default, activated and started then with no configuration.<\/p>\n<h3>Solving the problem<\/h3>\n<p>There is 2 solutions. <\/p>\n<h4>A\/ Configure and use chronyd<\/h4>\n<p>You configure \/etc\/chrony.conf with the NTP addresses given during appliance creation and you restart chronyd service.<\/p>\n<p>Configure chrony :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,3,10,11,12]\">\noracle@ODA01:\/u01\/app\/oracle\/local\/dmk\/etc\/ [rdbms19.8.0.0] vi \/etc\/chrony.conf\n\noracle@ODA01:\/u01\/app\/oracle\/local\/dmk\/etc\/ [rdbms19.8.0.0] cat \/etc\/chrony.conf\n# Use public servers from the pool.ntp.org project.\n# Please consider joining the pool (http:\/\/www.pool.ntp.org\/join.html).\n#server 0.pool.ntp.org iburst\n#server 1.pool.ntp.org iburst\n#server 2.pool.ntp.org iburst\n#server 3.pool.ntp.org iburst\nserver 212.X.X.X.103 prefer\nserver 212.X.X.X.100\nserver 212.X.X.X.101\n\n\n# Record the rate at which the system clock gains\/losses time.\ndriftfile \/var\/lib\/chrony\/drift\n\n# Allow the system clock to be stepped in the first three updates\n# if its offset is larger than 1 second.\nmakestep 1.0 3\n\n# Enable kernel synchronization of the real-time clock (RTC).\nrtcsync\n\n# Enable hardware timestamping on all interfaces that support it.\n#hwtimestamp *\n\n# Increase the minimum number of selectable sources required to adjust\n# the system clock.\n#minsources 2\n\n# Allow NTP client access from local network.\n#allow 192.168.0.0\/16\n\n# Serve time even if not synchronized to a time source.\n#local stratum 10\n\n# Specify file containing keys for NTP authentication.\n#keyfile \/etc\/chrony.keys\n\n# Specify directory for log files.\nlogdir \/var\/log\/chrony\n\n# Select which information is logged.\n#log measurements statistics tracking\n<\/pre>\n<p><\/br><\/p>\n<p>And you restart chrony service :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1]\">\n[root@ODA01 ~]# service chronyd restart\nRedirecting to \/bin\/systemctl restart chronyd.service\n<\/pre>\n<p><\/br><\/p>\n<h4>B\/ Start ntp<\/h4>\n<p>Starting ntp will automatically stop chrony service.<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,4]\">\n[root@ODA01 ~]# ntpq -p\nntpq: read: Connection refused\n\n[root@ODA01 ~]# service ntpd restart\nRedirecting to \/bin\/systemctl restart ntpd.service\n<\/pre>\n<p><\/br><\/p>\n<p>Checking synchronization :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1]\">\n[root@ODA01 ~]# ntpq -p\n     remote           refid      st t when poll reach   delay   offset  jitter\n==============================================================================\nlantime. domain_name .STEP.          16 u    - 1024    0    0.000    0.000   0.000\n*ntp1. domain_name    131.188.3.223    2 u  929 1024  377    0.935   -0.053   0.914\n+ntp2. domain_name    131.188.3.223    2 u  113 1024  377    0.766    0.184   2.779\n\n<\/pre>\n<p><\/br><\/p>\n<p>Checking both ntp and chrony services :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,23]\">\n[root@ODA01 ~]# service ntpd status\nRedirecting to \/bin\/systemctl status ntpd.service\n\u25cf ntpd.service - Network Time Service\n   Loaded: loaded (\/usr\/lib\/systemd\/system\/ntpd.service; enabled; vendor preset: disabled)\n   Active: active (running) since Fri 2020-11-27 09:40:08 CET; 31min ago\n  Process: 68548 ExecStart=\/usr\/sbin\/ntpd -u ntp:ntp $OPTIONS (code=exited, status=0\/SUCCESS)\nMain PID: 68549 (ntpd)\n    Tasks: 1\n   CGroup: \/system.slice\/ntpd.service\n           \u2514\u250068549 \/usr\/sbin\/ntpd -u ntp:ntp -g\n\nNov 27 09:40:08 ODA01 ntpd[68549]: ntp_io: estimated max descriptors: 1024, initial socket boundary: 16\nNov 27 09:40:08 ODA01 ntpd[68549]: Listen and drop on 0 v4wildcard 0.0.0.0 UDP 123\nNov 27 09:40:08 ODA01 ntpd[68549]: Listen normally on 1 lo 127.0.0.1 UDP 123\nNov 27 09:40:08 ODA01 ntpd[68549]: Listen normally on 2 btbond1 10.X.X.10 UDP 123\nNov 27 09:40:08 ODA01 ntpd[68549]: Listen normally on 3 priv0 192.X.X.24 UDP 123\nNov 27 09:40:08 ODA01 ntpd[68549]: Listen normally on 4 virbr0 192.X.X.1 UDP 123\nNov 27 09:40:08 ODA01 ntpd[68549]: Listening on routing socket on fd #21 for interface updates\nNov 27 09:40:08 ODA01 ntpd[68549]: 0.0.0.0 c016 06 restart\nNov 27 09:40:08 ODA01 ntpd[68549]: 0.0.0.0 c012 02 freq_set kernel 0.000 PPM\nNov 27 09:40:08 ODA01 ntpd[68549]: 0.0.0.0 c011 01 freq_not_set\n\n[root@ODA01 ~]# service chronyd status\nRedirecting to \/bin\/systemctl status chronyd.service\n\u25cf chronyd.service - NTP client\/server\n   Loaded: loaded (\/usr\/lib\/systemd\/system\/chronyd.service; enabled; vendor preset: enabled)\n   Active: inactive (dead) since Fri 2020-11-27 09:40:08 CET; 32min ago\n     Docs: man:chronyd(8)\n           man:chrony.conf(5)\n  Process: 46183 ExecStartPost=\/usr\/libexec\/chrony-helper update-daemon (code=exited, status=0\/SUCCESS)\n  Process: 46180 ExecStart=\/usr\/sbin\/chronyd $OPTIONS (code=exited, status=0\/SUCCESS)\nMain PID: 46182 (code=exited, status=0\/SUCCESS)\n\nNov 27 09:18:25 ODA01 systemd[1]: Starting NTP client\/server...\nNov 27 09:18:25 ODA01 chronyd[46182]: chronyd version 3.4 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +SECHASH +IPV6 +DEBUG)\nNov 27 09:18:25 ODA01 chronyd[46182]: Frequency 0.000 +\/- 1000000.000 ppm read from \/var\/lib\/chrony\/drift\nNov 27 09:18:25 ODA01 systemd[1]: Started NTP client\/server.\nNov 27 09:40:08 ODA01 systemd[1]: Stopping NTP client\/server...\nNov 27 09:40:08 ODA01 systemd[1]: Stopped NTP client\/server.\n<\/pre>\n<p><\/br><\/p>\n<p>You might need to deactivate chronyd service with systemctl to avoid chronyd starting automatically after server reboot.<\/p>\n<h3>Are you getting a socket error with chrony?<\/h3>\n<p>If you are getting following error starting chrony, you will need to give appropriate option to start chronyd with IPv4 :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1\">\nNov 27 09:09:19 ODA01 chronyd[35107]: Could not open IPv6 command socket : Address family not supported by protocol.\n<\/pre>\n<p><\/br><\/p>\n<p>Example of error encountered :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,17]\">\n[root@ODA01 ~]# service chronyd status\nRedirecting to \/bin\/systemctl status chronyd.service\n\u25cf chronyd.service - NTP client\/server\n   Loaded: loaded (\/usr\/lib\/systemd\/system\/chronyd.service; enabled; vendor preset: enabled)\n   Active: active (running) since Fri 2020-11-27 09:09:19 CET; 5min ago\n     Docs: man:chronyd(8)\n           man:chrony.conf(5)\n  Process: 35109 ExecStartPost=\/usr\/libexec\/chrony-helper update-daemon (code=exited, status=0\/SUCCESS)\n  Process: 35105 ExecStart=\/usr\/sbin\/chronyd $OPTIONS (code=exited, status=0\/SUCCESS)\nMain PID: 35107 (chronyd)\n    Tasks: 1\n   CGroup: \/system.slice\/chronyd.service\n           \u2514\u250035107 \/usr\/sbin\/chronyd\n\nNov 27 09:09:19 ODA01 systemd[1]: Starting NTP client\/server...\nNov 27 09:09:19 ODA01 chronyd[35107]: chronyd version 3.4 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +SECHASH +IPV6 +DEBUG)\nNov 27 09:09:19 ODA01 chronyd[35107]: Could not open IPv6 command socket : Address family not supported by protocol\nNov 27 09:09:19 ODA01 chronyd[35107]: Frequency 0.000 +\/- 1000000.000 ppm read from \/var\/lib\/chrony\/drift\nNov 27 09:09:19 ODA01 systemd[1]: Started NTP client\/server.\n<\/pre>\n<p><\/br><\/p>\n<p>Chronyd system service is using a variable to set options :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,13]\">\n[root@ODA01 ~]# cat \/usr\/lib\/systemd\/system\/chronyd.service\n[Unit]\nDescription=NTP client\/server\nDocumentation=man:chronyd(8) man:chrony.conf(5)\nAfter=ntpdate.service sntp.service ntpd.service\nConflicts=ntpd.service systemd-timesyncd.service\nConditionCapability=CAP_SYS_TIME\n\n[Service]\nType=forking\nPIDFile=\/var\/run\/chrony\/chronyd.pid\nEnvironmentFile=-\/etc\/sysconfig\/chronyd\nExecStart=\/usr\/sbin\/chronyd $OPTIONS\nExecStartPost=\/usr\/libexec\/chrony-helper update-daemon\nPrivateTmp=yes\nProtectHome=yes\nProtectSystem=full\n\n[Install]\nWantedBy=multi-user.target\n<\/pre>\n<p><\/br><\/p>\n<p>Need to put options -4 to chronyd service configuration file :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,3,5,7,9]\">\n[root@ODA01 ~]# cat \/etc\/sysconfig\/chronyd\n# Command-line options for chronyd\nOPTIONS=\"\"\n\n[root@ODA01 ~]# vi \/etc\/sysconfig\/chronyd\n\n[root@ODA01 ~]# cat \/etc\/sysconfig\/chronyd\n# Command-line options for chronyd\nOPTIONS=\"-4\"\n<\/pre>\n<p><\/br><\/p>\n<p>You will just need to restart chrony service :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1,4]\">\n[root@ODA01 ~]# service chronyd restart\nRedirecting to \/bin\/systemctl restart chronyd.service\n\n[root@ODA01 ~]# service chronyd status\nRedirecting to \/bin\/systemctl status chronyd.service\n\u25cf chronyd.service - NTP client\/server\n   Loaded: loaded (\/usr\/lib\/systemd\/system\/chronyd.service; enabled; vendor preset: enabled)\n   Active: active (running) since Fri 2020-11-27 09:18:25 CET; 4s ago\n     Docs: man:chronyd(8)\n           man:chrony.conf(5)\n  Process: 46183 ExecStartPost=\/usr\/libexec\/chrony-helper update-daemon (code=exited, status=0\/SUCCESS)\n  Process: 46180 ExecStart=\/usr\/sbin\/chronyd $OPTIONS (code=exited, status=0\/SUCCESS)\nMain PID: 46182 (chronyd)\n    Tasks: 1\n   CGroup: \/system.slice\/chronyd.service\n           \u2514\u250046182 \/usr\/sbin\/chronyd -4\n\nNov 27 09:18:25 ODA01 systemd[1]: Starting NTP client\/server...\nNov 27 09:18:25 ODA01 chronyd[46182]: chronyd version 3.4 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +SECHASH +IPV6 +DEBUG)\nNov 27 09:18:25 ODA01 chronyd[46182]: Frequency 0.000 +\/- 1000000.000 ppm read from \/var\/lib\/chrony\/drift\nNov 27 09:18:25 ODA01 systemd[1]: Started NTP client\/server.\n<\/pre>\n<p><\/br><\/p>\n<p>Finally you can then use following command to check NTP synchronisation with chronyd :<\/p>\n<pre class=\"brush: sql; gutter: true; first-line: 1; highlight: [1]\">\n[root@ODA01 ~]# chronyc tracking\n<\/pre>\n<p><\/br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Having recently reimaged and patched several ODA in version 19.8 and 19.9, I could see an issue with NTP. During my troubleshooting I could determine the root cause and find appropriate solution. Through this blog I would like to share my experience with you.<\/p>\n","protected":false},"author":48,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[59],"tags":[1476,123,79,96],"type_dbi":[],"class_list":["post-15413","post","type-post","status-publish","format-standard","hentry","category-oracle","tag-appliance","tag-ntp","tag-oda","tag-oracle"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NTP is not working for ODA new deployment (reimage) in version 19.8? - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/ntp-is-not-working-for-oda-new-deployment-reimage-in-version-19-8\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NTP is not working for ODA new deployment (reimage) in version 19.8?\" \/>\n<meta property=\"og:description\" content=\"Having recently reimaged and patched several ODA in version 19.8 and 19.9, I could see an issue with NTP. 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