The structure is generic to support most hardware accelerators like
GPUs, TPUs etc.
Note that the prometheus label for id is called acc_id, so that it
doesn't conflict with some other label that maybe called id.
If CPU quota is configured (cpu.cfs_quota != -1) the CFS will provide
stats about elapsed periods and throtting in cpu.stats. This change
makes these information available as container_cpu_cfs_* metrics.
collection would stay counted in the gauge "container_scrape_errors",
making that particular metric useless. Instead, it must be reset on
every scrape.
This add Envs to container spec as a metadata source. When using prometheus
exposition format, they will be merged into the list of metrics' labels.
Also changed the cli flag to docker_env_metadata_whitelist, and add refenrences
of whitelist envs to API
Signed-off-by: Daniel Dao <dqminh@cloudflare.com>
