docker.cpu Metrics from DataDog

• docker.cpu.system

• The percent of time the CPU is executing system calls on behalf of processes of this container, unnormalized
• percent

• docker.cpu.user

• The percent of time the CPU is under direct control of processes of this container, unnormalized
• percent

• docker.cpu.usage

• The percent of CPU time obtained by this container
• percent

• docker.cpu.throttled

• Number of times the cgroup has been throttled

• docker.cpu.shares

• Shares of CPU usage allocated to the container

计算公式

docker.cpu.user = RATE(user)
docker.cpu.system = RATE(system)
docker.cpu.usage = RATE(usage / 10000000)
docker.cpu.throttled = RATE(nr_throttled)
docker.cpu.shares = RATE(shares)

数据来源

容器对应的cpuacct.stat and cpuacct.usage文件可能在如下三个位置：

• /sys/fs/cgroup/cpuacct/docker/<container_id>/
• /sys/fs/cgroup/cpuacct/kubepods/burstable/<pod_id>/<container_id>/
• /sys/fs/cgroup/cpuacct/kubepods/besteffort/<pod_id>/<container_id>/
• /sys/fs/cgroup/cpuacct/kubepods/<pod_id>/<container_id>/

容器对应的cpu.stat and cpu.shares文件可能在如下三个位置：

• /sys/fs/cgroup/cpu/docker/<container_id>/
• /sys/fs/cgroup/cpu/kubepods/burstable/<pod_id>/<container_id>/
• /sys/fs/cgroup/cpu/kubepods/besteffort/<pod_id>/<container_id>/
• /sys/fs/cgroup/cpu/kubepods/<pod_id>/<container_id>/

文件示例内容如下：

# cat cpuacct.stat

user 119045
system 75873

# cat cpuacct.usage

2397517073279

# cat cpu.stat

nr_periods 0
nr_throttled 0
throttled_time 0

# cat cpu.shares

1024