mackerel-plugin-linux is a plugin that aggregates Linux information every minute and posts it as a metric.
Monitorable metrics
Linux Users
| Metric Display Name | Metric Name | Diff | Stacked | Description |
|---|---|---|---|---|
| Users | linux.users.users | Number of logged-in users |
Post the number of users resulting from the who command.
Linux Interrupts
| Metric Display Name | Metric Name | Diff | Stacked | Description |
|---|---|---|---|---|
| Interrupts | linux.interrupts.interrupts | ✓ | Number of interrupts generated by the system |
Post the value of intr in /proc/stat.
Linux Context Switches
| Metric Display Name | Metric Name | Diff | Stacked | Description |
|---|---|---|---|---|
| Context Switches | linux.context_switches.context_switches | ✓ | Number of context switches |
Post the value of ctxt in /proc/stat.
Linux Forks
| Metric Display Name | Metric Name | Diff | Stacked | Description |
|---|---|---|---|---|
| Forks | linux.forks.forks | ✓ | Number of forks |
Post the value of processes in /proc/stat.
Disk Elapsed IO Time
| Metric Display Name | Metric Name | Diff | Stacked | Description |
|---|---|---|---|---|
| <device> IO Time | linux.disk.elapsed.iotime_<device> | ✓ | Total time this block device has been active (ms) | |
| <device> IO Time Weighted | linux.disk.elapsed.iotime_weighted_<device> | ✓ | Total waiting time for all requests (ms) |
Post io_ticks and time_in_queue values in /sys/block/<device>/stat. <device> is replaced by the device name.
Disk Read/Write Time
| Metric Display Name | Metric Name | Diff | Stacked | Description |
|---|---|---|---|---|
| <device> Read | linux.disk.rwtime.tsreading_<device> | ✓ | Total waiting time for read requests (ms) | |
| <device> Write | linux.disk.rwtime.tswriting_<device> | ✓ | Total wait time for write requests (ms) |
Post values of read ticks and write ticks in /sys/block/<device>/stat. <device> is replaced by the device name.
Linux Network Connection States
| Metric Display Name | Metric Name | Diff | Stacked | Description |
|---|---|---|---|---|
| Established | linux.ss.ESTAB | ✓ | Number of ESTAB | |
| Syn Sent | linux.ss.SYN-SENT | ✓ | Number of SYN-SENT | |
| Syn Received | linux.ss.SYN-RECV | ✓ | Number of SYN-RECV | |
| Fin Wait 1 | linux.ss.FIN-WAIT-1 | ✓ | Number of FIN-WAIT-1 | |
| Fin Wait 2 | linux.ss.FIN-WAIT-2 | ✓ | Number of FIN-WAIT-2 | |
| Time Wait | linux.ss.TIME-WAIT | ✓ | Number of TIME-WAIT | |
| Close | linux.ss.UNCONN | ✓ | Number of UNCONN | |
| Close Wait | linux.ss.CLOSE-WAIT | ✓ | Number of CLOSE-WAIT | |
| Last Ack | linux.ss.LAST-ACK | ✓ | Number of LAST-ACK | |
| Listen | linux.ss.LISTEN | ✓ | Number of LISTEN | |
| Closing | linux.ss.CLOSING | ✓ | Number of CLOSING | |
| Unknown | linux.ss.UNKNOWN | ✓ | Number of UNKNOWN |
Post the number of ss command results counted by State.
Linux Swap Usage
| Metric Display Name | Metric Name | Diff | Stacked | Description |
|---|---|---|---|---|
| Swap In | linux.swap.pswpin | ✓ | Number of pages swap in | |
| Swap Out | linux.swap.pswpout | ✓ | Number of pages swap out |
Post pswpin and pswpout values in /proc/vmstat.
Configurable options
| Option | Short | Description | Default |
|---|---|---|---|
| --tempfile | -t | Specify the destination file path for tempfile | |
| --type | -p | Filter the metrics to be retrieve Choose all, users, proc_stat, diskstats, netstat, or swap |
all |
| --version | -v | Show the plugin version | |
| --help | -h | Show Help |
The tempfile contains the aggregated results. By default, it is created under /var/tmp/mackerel-agent/ as mackerel-plugin-linux-<hash string>.
Example configuration
[plugin.metrics.linux] command = ["mackerel-plugin-linux"]
Repository
https://github.com/mackerelio/mackerel-agent-plugins/tree/master/mackerel-plugin-linux
