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ansible.posix.cgroup_perf_recap callback – Profiles system activity of tasks and full execution using cgroups
Note This callback plugin is part of the ansible.posix collection (version 1.5.4). You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list. To install it, use: ansible-galaxy collection install ansible.posix. You need further requirements to be able to use this callback plugin, see Requirements for details. To use it in a playbook, specify: ansible.posix.cgroup_perf_recap. Callback pluginThis plugin is an aggregate callback. It adds additional console output next to the configured stdout callback. See Callback plugins for more information on callback plugins. SynopsisThis is an ansible callback plugin utilizes cgroups to profile system activity of ansible and individual tasks, and display a recap at the end of the playbook execution RequirementsThe below requirements are needed on the local controller node that executes this callback. whitelist in configuration cgroups ParametersParameter Comments control_group string / required Name of cgroups control group Configuration: INI entry: [callback_cgroup_perf_recap] control_group = VALUEEnvironment variable: CGROUP_CONTROL_GROUP cpu_poll_interval float Interval between CPU polling for determining CPU usage. A lower value may produce inaccurate results, a higher value may not be short enough to collect results for short tasks. Default: 0.25 Configuration: INI entry: [callback_cgroup_perf_recap] cpu_poll_interval = 0.25Environment variable: CGROUP_CPU_POLL_INTERVAL display_recap boolean Controls whether the recap is printed at the end, useful if you will automatically process the output files Choices: false true ← (default) Configuration: INI entry: [callback_cgroup_perf_recap] display_recap = trueEnvironment variable: CGROUP_DISPLAY_RECAP file_name_format string Format of filename. Accepts %(counters), %(task_uuids), %(features), %(exts). Defaults to %(features.%(ext)s) when file_per_task is False and %(counters-%(task_uuid)s-%(feature)s.%(ext)s) when True Default: "%(feature)s.%(ext)s" Configuration: INI entry: [callback_cgroup_perf_recap] file_name_format = %(feature)s.%(ext)sEnvironment variable: CGROUP_FILE_NAME_FORMAT file_per_task boolean When set as True along with write_files, this callback will write 1 file per task instead of 1 file for the entire playbook run Choices: false ← (default) true Configuration: INI entry: [callback_cgroup_perf_recap] file_per_task = falseEnvironment variable: CGROUP_FILE_PER_TASK memory_poll_interval float Interval between memory polling for determining memory usage. A lower value may produce inaccurate results, a higher value may not be short enough to collect results for short tasks. Default: 0.25 Configuration: INI entry: [callback_cgroup_perf_recap] memory_poll_interval = 0.25Environment variable: CGROUP_MEMORY_POLL_INTERVAL output_dir path Output directory for files containing recorded performance readings. If the value contains a single %s, the start time of the playbook run will be inserted in that space. Only the deepest level directory will be created if it does not exist, parent directories will not be created. Default: "/tmp/ansible-perf-%s" Configuration: INI entry: [callback_cgroup_perf_recap] output_dir = /tmp/ansible-perf-%sEnvironment variable: CGROUP_OUTPUT_DIR output_format string Output format, either CSV or JSON-seq Choices: "csv" ← (default) "json" Configuration: INI entry: [callback_cgroup_perf_recap] output_format = csvEnvironment variable: CGROUP_OUTPUT_FORMAT pid_poll_interval float Interval between PID polling for determining PID count. A lower value may produce inaccurate results, a higher value may not be short enough to collect results for short tasks. Default: 0.25 Configuration: INI entry: [callback_cgroup_perf_recap] pid_poll_interval = 0.25Environment variable: CGROUP_PID_POLL_INTERVAL write_files boolean Dictates whether files will be written containing performance readings Choices: false ← (default) true Configuration: INI entry: [callback_cgroup_perf_recap] write_files = falseEnvironment variable: CGROUP_WRITE_FILES NotesNote Requires ansible to be run from within a cgroup, such as with cgexec -g cpuacct,memory,pids:ansible_profile ansible-playbook ... This cgroup should only be used by ansible to get accurate results To create the cgroup, first use a command such as sudo cgcreate -a ec2-user:ec2-user -t ec2-user:ec2-user -g cpuacct,memory,pids:ansible_profile Hint Configuration entries for each entry type have a low to high priority order. For example, a variable that is lower in the list will override a variable that is higher up. Collection links Issue Tracker Repository (Sources) |
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