Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you about the common expressions of prometheus. The article is rich in content and analyzed and described from a professional point of view. I hope you can get something after reading this article.

1. Collect memory utilization

Total memory on the node_memory_MemTotal_bytes host

Free memory on the node_memory_MemFree_bytes host

Memory on the node_memory_Buffers_bytes buffer cache

Memory in the node_memory_Cached_bytes page cache

Calculate the percentage of memory used

(total memory-(free memory-buffer + cache)) / total memory * 100

Round ((node_memory_MemTotal_bytes- (node_memory_MemFree_bytes+node_memory_Buffers_bytes+node_memory_Cached_bytes)) / node_memory_MemTotal_bytes * 100)

2. Collect cpu

1. Collect cpu utilization: use the function of irate to calculate the instantaneous growth rate per second and instantaneous growth rate of the authentic time series of distance vectors.

Irate (node_cpu_seconds_total {instance= "$ip"} [5m])

2. Average utilization rate of avg

Avg (irate (node_cpu_seconds_total {job= "server", mode= "idle"} [5m])) * 100

3. Average percentage of usage

Avg (irate (node_cpu_seconds_total {job= "server", mode= "idle"} [5m])) * 100

3. Disk utilization

1. Percentage of disk utilization, idle

Free space / total space

Node_filesystem_files_free {mountpoint= "/", device= "/ dev/mapper/centos-root", job= "server"} / node_filesystem_size_bytes {mountpoint= "/", device= "/ dev/mapper/centos-root", job= "server"} * 100

2. Remaining disk utilization

Node_filesystem_files_free {mountpoint= "/", device= "/ dev/mapper/centos-root"} / node_filesystem_size_bytes {mountpoint= "/", device= "/ dev/mapper/centos-root"} * 100

4. Disk io

1. The growth rate of io in five minutes

Irate (node_disk_io_time_seconds_ Total [5m])

2. Average within five minutes

Avg (irate (node_disk_io_time_seconds_ Total [5m])) * 100

3. Percentage of disk io idle

Avg (irate (node_disk_io_time_seconds_ Total [5m])) * 100)

5. Network

1. The growth rate of the network card within five minutes

Node_network_receive_bytes_total {device=~ "ens160 | docker0"} [5m]

2. Average within five minutes

Round (irate (node_network_receive_bytes_total {device=~ "ens160 | docker0"} [5m]) / 1024)

The above is what the common prometheus expressions are like. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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