datadog-agent: There was an error querying the ntp host

Describe what happened: Launched the agent and the logs look like:

[ AGENT ] 2018-03-27 18:42:06 UTC | INFO | (transaction.go:129 in Process) | Successfully posted payload to "https://6-1-0-app.agent.datadoghq.com/intake/?api_key=*************************370fe"
[ AGENT ] 2018-03-27 18:42:12 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:49888->45.76.244.202:123: i/o timeout
[ AGENT ] 2018-03-27 18:42:27 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:58747->198.137.202.56:123: i/o timeout
[ AGENT ] 2018-03-27 18:42:37 UTC | INFO | (serializer.go:196 in SendJSONToV1Intake) | Sent processes metadata payload, size: 410 bytes.
[ AGENT ] 2018-03-27 18:42:42 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:44762->38.229.71.1:123: i/o timeout
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check cpu
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:302 in work) | Done running check cpu
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check disk
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:302 in work) | Done running check disk
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check docker
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:302 in work) | Done running check docker
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check file_handle
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:302 in work) | Done running check file_handle
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check io
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:302 in work) | Done running check io
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check load
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:302 in work) | Done running check load
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check memory
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:302 in work) | Done running check memory
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check network
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:302 in work) | Done running check network
[ AGENT ] 2018-03-27 18:42:52 UTC | INFO | (runner.go:246 in work) | Running check ntp
[ AGENT ] 2018-03-27 18:42:57 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:56134->162.210.111.4:123: i/o timeout
[ AGENT ] 2018-03-27 18:42:57 UTC | INFO | (runner.go:302 in work) | Done running check ntp
[ AGENT ] 2018-03-27 18:42:57 UTC | INFO | (runner.go:246 in work) | Running check uptime
[ AGENT ] 2018-03-27 18:42:57 UTC | INFO | (runner.go:302 in work) | Done running check uptime
[ AGENT ] 2018-03-27 18:43:12 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:43058->162.210.111.4:123: i/o timeout
[ AGENT ] 2018-03-27 18:43:27 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:46164->107.161.29.207:123: i/o timeout
[ AGENT ] 2018-03-27 18:43:42 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:39099->162.210.111.4:123: i/o timeout
[ AGENT ] 2018-03-27 18:43:57 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:52643->171.66.97.126:123: i/o timeout
[ AGENT ] 2018-03-27 18:44:12 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:34427->162.210.111.4:123: i/o timeout
[ AGENT ] 2018-03-27 18:44:21 UTC | INFO | (transaction.go:129 in Process) | Successfully posted payload to "https://6-1-0-app.agent.datadoghq.com/api/v1/check_run?api_key=*************************370fe"
[ AGENT ] 2018-03-27 18:44:27 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:53556->204.11.201.10:123: i/o timeout
[ AGENT ] 2018-03-27 18:44:42 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:59500->172.98.193.44:123: i/o timeout
[ AGENT ] 2018-03-27 18:44:57 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:33902->96.244.96.19:123: i/o timeout
[ AGENT ] 2018-03-27 18:45:12 UTC | INFO | (ntp.go:122 in Run) | There was an error querying the ntp host: read udp 172.17.0.5:36223->198.137.202.56:123: i/o timeout

Additional environment details (Operating System, Cloud provider, etc): Docker, AWS, Amazon Linux