The Hosted Graphite Agent
Our agent is a simple way to get your metrics into Hosted Graphite. You install it on your machines, and it collects and forwards the system’s metrics for you.
Contents
Get started by pulling down our installer script.
For Debian-based systems, including Ubuntu:
curl -s https://YO[email protected]/agent/installer/deb/ | sudo sh
or for RHEL-based systems:
curl -s https://YO[email protected]/agent/installer/rpm/ | sudo sh
If you would like to set up installation and configuration via Puppet, Chef, or a similar configuration management system, see our repository install instructions.
Once your agent is sending metrics, you will find it in your Agent list, along with a link to an auto-generated Base Metrics dashboard named Hosted Graphite Agent.
We support the following stable OS releases on 64-bit machines:
- CentOS 7 forward (covering the RedHat family);
- Debian buster forward;
- Ubuntu 16.04 forward (LTS).
This should cover most installs on RHEL, CentOS, Amazon Linux, and Debian/Ubuntu family platforms.
The Hosted Graphite agent is an easy-to-use bundle of the popular metrics collector Diamond and the Supervisor process manager along with an embedded build of Python and some support scripts.
- Faster submission of metric data from your application because it doesn’t have to do a DNS lookup, or connect out across the internet.
- More reliable delivery because the agent stores-and-forwards, buffering on disk when it can’t connect.
- Easier debugging for the “my metric is missing” problem because our UI can tell you that an agent has stopped responding.
- More secure: the agent uses HTTPS and while we offer TLS-wrapped carbon protocols, it’s more effort to use than the plaintext ones. Sending straight to the agent bypasses this and we take care of it for you.
- No need to prefix your metrics with an API key for HG’s authentication: it’s handled for you, using the API key in the agent config.
- No need to specify new firewall rules for carbon protocols and keep the rules updated - if you can already get HTTPS out of your network, even via a proxy, then it’ll work.
For more details on how the agent works on your machines, see System Layout. The agent’s default metrics are listed and explained in Base Metrics.
The Agent list provides an overview of all agents associated with your account. From here, you can view the status of each agent and other information.
The colored circle representing the State can take 3 values:
- Green: The agent is reporting normally at the correct time.
- Yellow: Agent has not reported in over 20 minutes, or is reporting with the wrong time.
- Red: The agent has reported errors in recent log messages.
An agent’s Clock Offset is the difference between the time reported by the agent and the time recorded on our server. Incorrect time can produce anomalies in metric data so it is advised to keep the agent’s clock accurate.
You can delete the record of an agent from this page, but be aware that this will not uninstall the agent. To uninstall an agent, use your package manager.
Base system metrics dashboard
This dashboard can be located and uploaded from our Dashboard Library. It displays many of the metrics reported by the Hosted Graphite agent but can be customized further.
Agent configuration is minimal and done via
/etc/opt/hg-agent/hg-agent.conf. This is used to generate a more complete configuration for diamond in /var/opt/hg-agent/diamond.conf.Typically
hg-agent.conf contains only an api_key:You can find the right value for this on your Hosted Graphite account page, but it should be filled in automatically by the simple installation process above.
Note that the agent takes control of
diamond configuration: if you want more nuanced control, you can run a separate diamond instance or whatever metric collection system you wish. You can still take advantage of the agent’s authentication management and local buffering/forwarding facilities by configuring it to send Graphite data to localhost.You can supply a custom prefix instead of
hg_agent, e.g. to specify a host environment:custom_prefix: hg_agent.prodenv
You can also specify different methods of picking up the hostname, per hostname_method in Diamond’s config. By default the agent uses
smart, but e.g. if you’d prefer the FQDN with . replaced by _:If your system requires a proxy to get
HTTPS access to the Internet:https_proxy: http://10.10.1.10:1080
If you would like the receiver to listen on something other than the default Carbon ports (defaults shown):
tcp_port: 2003
udp_port: 2003
If you’d like to keep more spool data for buffering locally during network outages (defaults shown):
max_spool_count: 10
spool_rotatesize: 10000000
Large customers with dedicated Hosted Graphite environments may need to specify metric data and metadata endpoints, e.g. for a cluster
tst:endpoint_url: https://tst.hostedgraphite.com/api/v1/sink
heartbeat_url: https://heartbeat-tst.hostedgraphite.com/beat
mongodb:
enabled: True
host: localhost
port: 27017
You can check whether your
hg-agent is reporting metadata to Hosted Graphite via the Agent list, and from there you can use the Base Metrics dashboard to see if metric data is flowing in. If not, you may need to dig a little deeper.Logs are in
/var/log/hg-agent: you can see the metrics generated by diamond in archive.log, as well as the various daemon logs supervisord.log, diamond.log, periodic.log, and forwarder.log e.g.$ tail -f /var/log/hg-agent/forwarder.log
You can inspect the agent as a service like any other, e.g. on Ubuntu
trusty:$ sudo service hg-agent status
If you’d like to look at things from the agent’s
supervisor point of view:$ sudo /opt/hg-agent/bin/supervisorctl --config=/etc/opt/hg-agent/supervisor.conf status
The sources used to build the agent can be followed at:
Hosted Graphite Agents can be uninstalled using your package manager.
For Debian-based systems:
sudo apt-get remove hg-agent
For RHEL-based systems:
Last modified 29d ago