Host monitoring allows you to monitor your hosts by installing the CloudMonitor agent on the hosts to collect operating system metrics.
Versions
The CloudMonitor agent has the following three versions that are sorted by release
time: Java agent, GoLang agent, and C++ agent. The C++ agent occupies less CPU and
memory resources than the Java agent and GoLang agent do. When Cloud Monitor needs
to monitor a large number of hosts, the C++ agent saves resources on the hosts, compared
with the other two agents. Therefore, we recommend that you install the C++ agent.
The following table describes the three versions of the CloudMonitor agent.
| Language | Version number | Description | Reference |
|---|---|---|---|
| C++ | 3.X | The C++ agent is the latest version. We recommend that you install the C++ agent. | Install and uninstall the CloudMonitor agent for C++ |
| Go | 2.X | The GoLang agent is no longer maintained. We recommend that you install the C++ agent. | |
| Java | 1.X | The Java agent is no longer maintained. We recommend that you install the C++ agent. |
System requirements
| Operating system | Architecture |
|---|---|
| Windows 7, Windows Server 2008 R2, or later | i386 or AMD64 |
| Linux 2.6.23 or later with the GNU C Library | i386 or AMD64 |
Installation path
- Linux: /usr/local/cloudmonitor
- Windows: C:\Program Files\Alibaba\cloudmonitor
Processes
After the CloudMonitor agent is installed, one of the following processes is run on
your hosts based on your operating system:
- Linux: /usr/local/cloudmonitor/bin/argusagent
- Windows: C:\Program Files\Alibaba\cloudmonitor\bin\argusagent
Ports
The CloudMonitor agent accesses TCP port 80, 443, 3128, or 8080 of a remote host to send heartbeat messages and report monitoring data.
Resource usage
| Resource | Usage |
|---|---|
| CPU | 0.2% to 1.0% of a CPU core |
| Memory | 10 MB to 20 MB |
| Network bandwidth | About 10 Kbit/s of internal bandwidth occupied when monitoring data is reported at
intervals of 15s
About 2 Kbit/s of internal bandwidth occupied when heartbeat messages are sent at intervals of 3 minutes |
| Disk space occupied by the installation package | 10 MB to 15 MB |
| Disk space occupied by logs | 10 MB occupied by a log file and up to 70 MB occupied by all log files |
Logs
The CloudMonitor agent stores logs in one of the following directories based on your
operating system:
- Windows: C:\Program Files\Alibaba\cloudmonitor\local_data\logs
- Linux: /usr/local/cloudmonitor/local_data/logs
The logs directory stores the following two types of logs:
- argusagentd.log: stores the logs generated by the C++ agent to daemonize processes. The logs contain information such as the startup and shutdown of monitoring processes.
- argusagent.log: stores the operational logs of the C++ agent.
Installation guide
For more information, see Install and uninstall the CloudMonitor agent for C++.
Common operations
For more information, see Common operations.