telegraf report "Cannot connect to the Docker daemon" afer telegraf enable input plugin docker

[MarginHu]

Hi Guys,

telegraf have a input plugin "docker" which can monitor docker container activity or event in one host,I add config in telegraf.conf as following:

[[inputs.docker]]
interval = "60s"
endpoint = "unix:///var/run/docker.sock"
container_names = []
timeout = "30s"
perdevice = true
total = false

but found errors happened.

Running command: 'telegraf -config /etc/telegraf/telegraf.conf -config-directory /etc/telegraf/telegraf.d/'
2017-10-09T14:04:09Z I! Starting Telegraf (version 1.2.1)
2017-10-09T14:04:09Z I! Loaded outputs: influxdb
2017-10-09T14:04:09Z I! Loaded inputs: inputs.haproxy inputs.disk inputs.diskio inputs.processes inputs.swap inputs.net inputs.cpu inputs.kernel inputs.mysql inputs.mem inputs.memcached inputs.elasticsearch inputs.rabbitmq inputs.system inputs.docker
2017-10-09T14:04:09Z I! Tags enabled: host=cloud-host-1
2017-10-09T14:04:09Z I! Agent Config: Interval:10s, Quiet:false, Hostname:"cloud-sz-control-b13-01.sz.cloud.genomics.cn", Flush Interval:10s
Cannot connect to the Docker daemon. Is the docker daemon running on this host?
2017-10-09T14:04:10Z E! ERROR in input [inputs.docker]: Cannot connect to the Docker daemon. Is the docker daemon running on this host?

[Eduardo Gonzalez (egonzalez90)]

Hi, you need to allow remote API connections to docker daemon.

Example of ExecStart systemd service for docker. The IP is the host IP or allow 0.0.0.0 to all IPs.

ExecStart=/usr/bin/dockerd -H tcp://192.168.100.244:2375 -H unix:///var/run/docker.sock

Regards