sync_node_time() failed to find available NTP servers

[Roman Podoliaka]

One of the staging jobs (http://jenkins-product.srt.mirantis.net:8080/job/5.1.2.staging.ubuntu.bvt_2/197/console) failed with:

Shutting down ntpd: [FAILED]
ntpd 4.2.6p5@1.2349-o Sat Nov 23 18:21:48 UTC 2013 (1)
 5 Jul 06:59:24 ntpd[1580]: proto: precision = 0.175 usec
 5 Jul 06:59:24 ntpd[1580]: 0.0.0.0 c01d 0d kern kernel time sync enabled
event at 0 0.0.0.0 c01d 0d kern kernel time sync enabled
Finished Parsing!!
 5 Jul 06:59:24 ntpd[1580]: ntp_io: estimated max descriptors: 1024, initial socket boundary: 16
 5 Jul 06:59:24 ntpd[1580]: Listen and drop on 0 v4wildcard 0.0.0.0 UDP 123
 5 Jul 06:59:24 ntpd[1580]: Listen and drop on 1 v6wildcard :: UDP 123
 5 Jul 06:59:24 ntpd[1580]: Listen normally on 2 lo 127.0.0.1 UDP 123
restrict: op 1 addr 127.0.0.1 mask 255.255.255.255 mflags 00003000 flags 00000001
 5 Jul 06:59:24 ntpd[1580]: Listen normally on 3 eth0 10.108.5.128 UDP 123
restrict: op 1 addr 10.108.5.128 mask 255.255.255.255 mflags 00003000 flags 00000001
 5 Jul 06:59:24 ntpd[1580]: Listen normally on 4 lo ::1 UDP 123
restrict: op 1 addr ::1 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 00003000 flags 00000001
 5 Jul 06:59:24 ntpd[1580]: Listen normally on 5 eth2 fe80::663d:d0ff:fe46:9de0 UDP 123
restrict: op 1 addr fe80::663d:d0ff:fe46:9de0 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 00003000 flags 00000001
 5 Jul 06:59:24 ntpd[1580]: Listen normally on 6 eth4 fe80::66c6:fff:fe1a:bf96 UDP 123
restrict: op 1 addr fe80::66c6:fff:fe1a:bf96 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 00003000 flags 00000001
 5 Jul 06:59:24 ntpd[1580]: Listen normally on 7 eth3 fe80::66ad:bff:fe6c:7185 UDP 123
restrict: op 1 addr fe80::66ad:bff:fe6c:7185 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 00003000 flags 00000001
 5 Jul 06:59:24 ntpd[1580]: Listen normally on 8 eth1 fe80::6690:4eff:fe43:4c60 UDP 123
restrict: op 1 addr fe80::6690:4eff:fe43:4c60 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 00003000 flags 00000001
 5 Jul 06:59:24 ntpd[1580]: Listen normally on 9 eth0 fe80::664c:faff:feb2:5b82 UDP 123
restrict: op 1 addr fe80::664c:faff:feb2:5b82 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 00003000 flags 00000001
 5 Jul 06:59:24 ntpd[1580]: peers refreshed
 5 Jul 06:59:24 ntpd[1580]: Listening on routing socket on fd #26 for interface updates
restrict: op 1 addr 0.0.0.0 mask 0.0.0.0 mflags 00000000 flags 000005d0
restrict: op 1 addr :: mask 0.0.0.0 mflags 00000000 flags 000005d0
restrict: op 1 addr :: mask :: mflags 00000000 flags 000005d0
restrict: op 1 addr 127.0.0.1 mask 255.255.255.255 mflags 00000000 flags 00000000
restrict: op 1 addr ::1 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 00000000 flags 00000000
key_expire: at 0 associd 64419
peer_clear: at 0 next 1 associd 64419 refid INIT
event at 0 10.108.5.2 8011 81 mobilize assoc 64419
newpeer: 10.108.5.128->10.108.5.2 mode 3 vers 4 poll 6 10 flags 0x141 0x1 ttl 0 key 00000000
 5 Jul 06:59:24 ntpd[1580]: 0.0.0.0 c016 06 restart
event at 0 0.0.0.0 c016 06 restart
 5 Jul 06:59:24 ntpd[1580]: 0.0.0.0 c012 02 freq_set kernel 0.000 PPM
event at 0 0.0.0.0 c012 02 freq_set kernel 0.000 PPM
transmit: at 1 10.108.5.128->10.108.5.2 mode 3 len 48
auth_agekeys: at 1 keys 1 expired 0
receive: at 1 10.108.5.128<-10.108.5.2 mode 4 len 48
event at 1 10.108.5.2 8024 84 reachable
clock_filter: n 1 off 0.795257 del 0.000401 dsp 7.937500 jit 0.000000
transmit: at 3 10.108.5.128->10.108.5.2 mode 3 len 48
receive: at 3 10.108.5.128<-10.108.5.2 mode 4 len 48
clock_filter: n 2 off 0.795362 del 0.000364 dsp 3.937508 jit 0.000105
transmit: at 5 10.108.5.128->10.108.5.2 mode 3 len 48
receive: at 5 10.108.5.128<-10.108.5.2 mode 4 len 48
clock_filter: n 3 off 0.795416 del 0.000304 dsp 1.937515 jit 0.000119
transmit: at 7 10.108.5.128->10.108.5.2 mode 3 len 48
receive: at 7 10.108.5.128<-10.108.5.2 mode 4 len 48
clock_filter: n 4 off 0.795458 del 0.000387 dsp 0.937521 jit 0.000131
transmit: at 9 10.108.5.128->10.108.5.2 mode 3 len 48
receive: at 9 10.108.5.128<-10.108.5.2 mode 4 len 48
clock_filter: n 5 off 0.795482 del 0.000362 dsp 0.437525 jit 0.000132
 5 Jul 06:59:35 ntpd[1580]: ntpd: no servers found
ntpd: no servers found

Looks like a temporary connectivity issue on CI.