How can I get CPU usage percent with docker.containers.stats?

Question

Code:

import docker
cli = docker.from_env()
print(cli.containers.get('container1').stats(stream=False)['precpu_stats'])

Output:

{'cpu_usage': {'total_usage': 6121320874, 'percpu_usage': [4662552384, 1458768490], 'usage_in_kernelmode': 970000000, 'usage_in_usermode': 4940000000}, 'system_cpu_usage': 24545140000000, 'online_cpus': 2, 'throttling_data': {'periods': 0, 'throttled_periods': 0, 'throttled_time': 0}}

How Can I get CPU usage percent from these informations? I used docker stats command on terminal and I got 0.11% CPU usage. But I can't get that 0.11% from this information.

Does this answer your question? [Get Docker Container CPU Usage as Percentage](https://stackoverflow.com/questions/30271942/get-docker-container-cpu-usage-as-percentage) — anemyte, Dec 29 '20 at 08:02
I calculated the values but I got wrong percentage. So that didn't help. — Mojtaba_1107, Dec 29 '20 at 14:13
I read it again and I realized that I made a mistake and it helped me a lot. Thanks — Mojtaba_1107, Dec 29 '20 at 15:06

score 1 · Accepted Answer · answered Dec 29 '20 at 15:05

Finally I got The answer and it's way is a little long...

import docker
cli = docker.from_env()
print(cli.containers.get('container').stats(stream=False)['cpu_stats'])
print('---------------------------------------------')
print(cli.containers.get('container').stats(stream=False)['precpu_stats'])

Output is:

{
'cpu_usage': 
    {
     'total_usage': 25382985593,
     'percpu_usage': [17829217240, 7553768353],
     'usage_in_kernelmode': 3280000000,
     'usage_in_usermode': 21040000000
    },
'system_cpu_usage': 75406420000000,
'online_cpus': 2,
'throttling_data': 
    {
     'periods': 0,
     'throttled_periods': 0,
     'throttled_time': 0
    }
}
---------------------------------------------
{
'cpu_usage': 
    {
     'total_usage': 25382168431,
     'percpu_usage': [17828400078, 7553768353],
     'usage_in_kernelmode': 3280000000,
     'usage_in_usermode': 21040000000
    },
'system_cpu_usage': 75400410000000,
'online_cpus': 2,
'throttling_data': 
    {
        'periods': 0,
        'throttled_periods': 0,
        'throttled_time': 0
    }
}

And now for getting percentage we have to do these:

import docker
client = docker.from_env()
stats = client.containers.get('container').stats(stream=False)
UsageDelta = stats['cpu_stats']['cpu_usage']['total_usage'] - stats['precpu_stats']['cpu_usage']['total_usage']
# from informations : UsageDelta = 25382985593 - 25382168431

SystemDelta = stats['cpu_stats']['cpu_usage']['system_cpu_usage'] - stats['precpu_stats']['cpu_usage']['system_cpu_usage']
# from informations : SystemDelta = 75406420000000 - 75400410000000

len_cpu = len(stats['cpu_stats']['cpu_usage']['percpu_usage'])
# from my informations : len_cpu = 2


percentage = (UsageDelta / SystemDelta) * len_cpu * 100
# this is a little big because the result is : 0.02719341098169717

percent = round(percentage, 2)
# now The output is 0.02 and thats the answer.

How can I get CPU usage percent with docker.containers.stats?

1 Answers1