{"id":19559,"date":"2017-05-14T06:56:50","date_gmt":"2017-05-13T22:56:50","guid":{"rendered":"https:\/\/2blog.ilc.edu.tw\/25793\/2017\/05\/14\/centos-7-x-%e4%bd%bf%e7%94%a8-chrony-%e8%87%aa%e5%8b%95%e6%a0%a1%e6%99%82\/"},"modified":"2021-03-18T17:25:02","modified_gmt":"2021-03-18T09:25:02","slug":"centos-7-x-%e4%bd%bf%e7%94%a8-chrony-%e8%87%aa%e5%8b%95%e6%a0%a1%e6%99%82","status":"publish","type":"post","link":"https:\/\/2blog.ilc.edu.tw\/25793\/2017\/05\/14\/centos-7-x-%e4%bd%bf%e7%94%a8-chrony-%e8%87%aa%e5%8b%95%e6%a0%a1%e6%99%82\/","title":{"rendered":"CentOS 7.x \u4f7f\u7528 chrony \u81ea\u52d5\u6821\u6642"},"content":{"rendered":"

\u53c3\u8003\u7db2\u9801\uff1a
\u4f7f\u7528 Chrony \u8abf\u6821\u7cfb\u7d71\u6642\u9593 | TechNote<\/a>
XYZ\u7684\u7b46\u8a18\u672c: CentOS 7 \u81ea\u52d5\u6821\u6642(\u4f7f\u7528chrony)<\/a>
[Linux] \u5728 CentOS 7 \u4e0a\u4f7f\u7528\u9810\u8a2d\u7684 chrony \u5957\u4ef6\u4f86\u8a2d\u5b9a NTP \u81ea\u52d5\u5c0d\u6642 @ \u4e82\u6253\u4e00\u901a\u7684\u5fc3\u60c5\u65e5\u8a18 :: \u75de\u5ba2\u90a6 PIXNET ::<\/a><\/p>\n

1. \u5b89\u88dd chrony
# yum install chrony<\/span><\/p>\n

2. \u555f\u52d5 chronyd \u670d\u52d9
# systemctl start chronyd.service<\/span><\/p>\n

3.\u00a0 \u6aa2\u67e5 chronyd \u57f7\u884c\u72c0\u614b
# systemctl status chronyd.service<\/span>
\u25cf chronyd.service – NTP client\/server<\/span>
\u00a0\u00a0 Loaded: loaded (\/usr\/lib\/systemd\/system\/chronyd.service; enabled; vendor preset: enabled)<\/span>
\u00a0\u00a0 Active: active (running) since Tue 2017-03-07 19:33:17 CST; 1 day 12h ago<\/span>
\u00a0Main PID: 621 (chronyd)<\/span>
\u00a0\u00a0 CGroup: \/system.slice\/chronyd.service<\/span>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 mq621 \/usr\/sbin\/chronyd<\/span><\/p>\n

Mar 07 19:33:17 proxy.tces.ilc.edu.tw systemd[1]: Starting NTP client\/server…<\/span>
Mar 07 19:33:17 proxy.tces.ilc.edu.tw chronyd[621]: chronyd version 2.1.1 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +DEBUG +ASYNCDNS +IPV6 +SECHASH)<\/span>
Mar 07 19:33:17 proxy.tces.ilc.edu.tw chronyd[621]: Frequency 14.920 +\/- 0.049 ppm read from \/var\/lib\/chrony\/drift<\/span>
Mar 07 19:33:17 proxy.tces.ilc.edu.tw systemd[1]: Started NTP client\/server.<\/span>
Mar 07 19:33:31 proxy.tces.ilc.edu.tw chronyd[621]: Selected source 103.18.128.60<\/span>
Mar 07 19:33:31 proxy.tces.ilc.edu.tw chronyd[621]: System clock wrong by -0.711733 seconds, adjustment started[@more@]<\/span><\/p>\n

4. \u6aa2\u67e5 NTP \u4f86\u6e90\u72c0\u614b
# \/usr\/bin\/chronyc sourcestats<\/span>
210 Number of sources = 4<\/span>
Name\/IP Address\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NP\u00a0 NR\u00a0 Span\u00a0 Frequency\u00a0 Freq Skew\u00a0 Offset\u00a0 Std Dev<\/span>
==============================================================================<\/span>
123-204-45-116.static.see\u00a0\u00a0 7\u00a0\u00a0 5\u00a0 103m\u00a0\u00a0\u00a0\u00a0 +0.033\u00a0\u00a0\u00a0\u00a0\u00a0 0.269\u00a0\u00a0 -103us\u00a0\u00a0 221us<\/span>
211-79-171-1.ip.rpb.gov.t\u00a0\u00a0 6\u00a0\u00a0 4\u00a0\u00a0 86m\u00a0\u00a0\u00a0\u00a0 -0.102\u00a0\u00a0\u00a0\u00a0\u00a0 1.012\u00a0\u00a0 -186us\u00a0\u00a0 521us<\/span>
2001:288:b012::2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 4\u00a0\u00a0 3\u00a0\u00a0 51m\u00a0\u00a0\u00a0\u00a0 -0.089\u00a0\u00a0\u00a0\u00a0\u00a0 2.182\u00a0\u00a0 -274us\u00a0\u00a0 112us<\/span>
103-18-128-60.ip.mwsrv.co\u00a0\u00a0 5\u00a0\u00a0 5\u00a0\u00a0 69m\u00a0\u00a0\u00a0\u00a0 -0.096\u00a0\u00a0\u00a0\u00a0\u00a0 0.661\u00a0\u00a0\u00a0 -26us\u00a0\u00a0 176us<\/span><\/p>\n

5. \u67e5\u770b NTP \u8a73\u7d30\u540c\u6b65\u72c0\u614b
# \/usr\/bin\/chronyc sources -v<\/span>
210 Number of sources = 4<\/span><\/p>\n

\u00a0 .– Source mode\u00a0 ‘^’ = server, ‘=’ = peer, ‘#’ = local clock.<\/span>
\u00a0\/ .- Source state ‘*’ = current synced, ‘+’ = combined , ‘-‘ = not combined,<\/span>
| \/\u00a0\u00a0 ‘?’ = unreachable, ‘x’ = time may be in error, ‘~’ = time too variable.<\/span>
||\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 .- xxxx [ yyyy ] +\/- zzzz<\/span>
||\u00a0\u00a0\u00a0\u00a0\u00a0 Reachability register (octal) -.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\u00a0 xxxx = adjusted offset,<\/span>
||\u00a0\u00a0\u00a0\u00a0\u00a0 Log2(Polling interval) –.\u00a0\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\u00a0 yyyy = measured offset,<\/span>
||\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\u00a0 zzzz = estimated error.<\/span>
||\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>
MS Name\/IP address\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Stratum Poll Reach LastRx Last sample<\/span>
===============================================================================<\/span>
^+ 123-204-45-116.static.see\u00a0\u00a0\u00a0\u00a0 3\u00a0 10\u00a0\u00a0 377\u00a0\u00a0\u00a0 21\u00a0 +1642us[+1642us] +\/-\u00a0\u00a0 67ms<\/span>
^- 211-79-171-1.ip.rpb.gov.t\u00a0\u00a0\u00a0\u00a0 3\u00a0 10\u00a0\u00a0 377\u00a0\u00a0 961\u00a0\u00a0\u00a0 -13us[\u00a0 -13us] +\/-\u00a0\u00a0 83ms<\/span>
^- 2001:288:b012::2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 3\u00a0 10\u00a0\u00a0 377\u00a0\u00a0 472\u00a0\u00a0 -808us[ -808us] +\/-\u00a0\u00a0 62ms<\/span>
^* 103-18-128-60.ip.mwsrv.co\u00a0\u00a0\u00a0\u00a0 2\u00a0 10\u00a0\u00a0 377\u00a0\u00a0 973\u00a0\u00a0\u00a0 +35us[\u00a0 -53us] +\/-\u00a0\u00a0 34ms<\/span><\/p>\n

6. \u67e5\u770b\u5c0d\u6642\u72c0\u6cc1
# \/usr\/bin\/chronyc tracking<\/span>
Reference ID\u00a0\u00a0\u00a0 : 103.18.128.60 (103-18-128-60.ip.mwsrv.com)<\/span>
Stratum\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : 3<\/span>
Ref time (UTC)\u00a0 : Thu Mar\u00a0 9 00:17:01 2017<\/span>
System time\u00a0\u00a0\u00a0\u00a0 : 0.000047602 seconds slow of NTP time<\/span>
Last offset\u00a0\u00a0\u00a0\u00a0 : +0.000010441 seconds<\/span>
RMS offset\u00a0\u00a0\u00a0\u00a0\u00a0 : 0.000198219 seconds<\/span>
Frequency\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : 14.958 ppm fast<\/span>
Residual freq\u00a0\u00a0 : -0.003 ppm<\/span>
Skew\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : 0.227 ppm<\/span>
Root delay\u00a0\u00a0\u00a0\u00a0\u00a0 : 0.009934 seconds<\/span>
Root dispersion : 0.028548 seconds<\/span>
Update interval : 1027.3 seconds<\/span>
Leap status\u00a0\u00a0\u00a0\u00a0 : Normal<\/span><\/p>\n

7. \u4f7f\u7528 chrony \u7acb\u523b\u5c0d\u6642
# \/usr\/bin\/chronyc -a makestep<\/span>
200 OK<\/span>
200 OK<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u53c3\u8003\u7db2\u9801\uff1a\u4f7f\u7528 Chrony \u8abf\u6821\u7cfb\u7d71\u6642\u9593 | TechNoteXYZ\u7684\u7b46\u8a18\u672c: CentOS 7 \u81ea\u52d5\u6821\u6642( … <\/p>\n

\u95b1\u8b80\u5168\u6587\u3008CentOS 7.x \u4f7f\u7528 chrony \u81ea\u52d5\u6821\u6642\u3009<\/span><\/a><\/p>\n","protected":false},"author":55,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[],"class_list":["post-19559","post","type-post","status-publish","format-standard","hentry","category-c-78462"],"meta_key":{"_pingme":["1"],"_encloseme":["1"],"lt_post_id":["688060"]},"_links":{"self":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/19559"}],"collection":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/users\/55"}],"replies":[{"embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/comments?post=19559"}],"version-history":[{"count":1,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/19559\/revisions"}],"predecessor-version":[{"id":21071,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/19559\/revisions\/21071"}],"wp:attachment":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/media?parent=19559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/categories?post=19559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/tags?post=19559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}