pvc-ansible/roles/pvc/tasks/cputuning/enable.yml

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---
# Calculate the correct per-node cpu sets
- name: set global values
set_fact:
system_cpus: "{{ cpu_tuning.nodes.system_cpus }}"
osd_cpus: "{{ cpu_tuning.nodes.osd_cpus }}"
- name: get per-node cpu tuning values
set_fact:
node_cpu_tuning: "{% for node in pvc_nodes if node.hostname == this_node %}{% if node.cpu_tuning is defined %}{{ node.cpu_tuning }}{% endif %}{% endfor %}"
- name: override global system_cpus value if set
set_fact:
system_cpus: "{{ node_cpu_tuning.system_cpus }}"
osd_cpus: "{{ node_cpu_tuning.osd_cpus }}"
when: node_cpu_tuning is defined and node_cpu_tuning
- name: get node CPU details
command: lscpu --json
register: lscpu
- name: set sockets variable
set_fact:
sockets: "{{ (lscpu.stdout|from_json|json_query(query)|list)[0] }}"
vars:
query: "lscpu[?field == 'Socket(s):'].data"
- name: set cores_per_socket variable
set_fact:
cores_per_socket: "{{ (lscpu.stdout|from_json|json_query(query)|list)[0] }}"
vars:
query: "lscpu[?field == 'Core(s) per socket:'].data"
- name: set threads_per_core variable
set_fact:
threads_per_core: "{{ (lscpu.stdout|from_json|json_query(query)|list)[0] }}"
vars:
query: "lscpu[?field == 'Thread(s) per core:'].data"
- name: set total_cores variable
set_fact:
total_cores: "{{ sockets|int * cores_per_socket|int }}"
- name: craft the system cpuset (first <system_cpus> cores + any threads as applicable)
set_fact:
cpuset_system: "{%- set cores = [] -%}
{%- for rng in range(0, system_cpus|int) -%}
{%- for core in range(rng, total_cores|int * threads_per_core|int, total_cores|int) -%}
{{ cores.append(core) }}
{%- endfor -%}
{%- endfor -%}
{{ cores|sort|join(',') }}"
- name: craft the osd cpuset (next <osd_cpus> cores + any threads as applicable)
set_fact:
cpuset_osd: "{%- set cores = [] -%}
{%- for rng in range(system_cpus|int, system_cpus|int + osd_cpus|int) -%}
{%- for core in range(rng, total_cores|int * threads_per_core|int, total_cores|int) -%}
{{ cores.append(core) }}
{%- endfor -%}
{%- endfor -%}
{{ cores|sort|join(',') }}"
- name: craft the VM cpuset (remaining cores + any threads as applicable)
set_fact:
cpuset_vm: "{%- set cores = [] -%}
{%- for rng in range(system_cpus|int + osd_cpus|int, total_cores|int) -%}
{%- for core in range(rng, total_cores|int * threads_per_core|int, total_cores|int) -%}
{{ cores.append(core) }}
{%- endfor -%}
{%- endfor -%}
{{ cores|sort|join(',') }}"
# Actually install the required components
- name: install slice tuning units
template:
src: "cputuning/{{ item }}.j2"
dest: "/etc/systemd/system/{{ item }}"
loop:
- system.slice
- user.slice
- osd.slice
- machine.slice
register: systemd_slices
- name: create osd unit override configuration directory
file:
dest: /etc/systemd/system/ceph-osd@.service.d
state: directory
- name: install osd cputuning configuration
template:
src: cputuning/ceph-osd@.service.d-cputuning.conf
dest: /etc/systemd/system/ceph-osd@.service.d/cputuning.conf
register: systemd_osdtuning
- name: reload systemd to apply changes
command: systemctl daemon-reload
when: systemd_slices.changed or systemd_osdtuning.changed