Remove cpuset configurations
This functionality simply did not work, with Libvirt continuing to dump its processes into the root cset thus defeating the purpose entirely. Just remove it, from some very initial testing it isn't worth the headache.
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@ -146,45 +146,6 @@ pvc_sriov_enable: False
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# Lowering the stack limit may cause poor performance or crashes in Zookeeper during some tasks.
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#pvc_zookeeper_stack_limit: 256M # 1/4 of default
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# CPU pinning configuration via cset
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# > ADVANCED TUNING: For most users, this is unnecessary and PVC will run fine with the default scheduling.
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# Uncomment these options only for testing or if you are certain you meet the following conditions.
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# > These options will tune cpuset (installed by default) to limit Ceph OSDs to certain CPU cores, while
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# simultaneously limiting other system tasks and VMs to the remaining CPU cores. In effect it dedicates the
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# specified CPU cores to Ceph OSDs only to ensure those processes can have dedicated CPU time.
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# > Generally speaking, except in cases where extremely high random read throughput is required and in which
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# the node(s) have a very large number of physical cores, this setting will not improve performance, and
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# may in fact hurt performance. For more details please see the documentation.
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# > For optimal performance when using this setting, you should dedicate exactly 2 cores, and their
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# respective SMT threads if applicable, to each OSD. For instance, with 2 OSDs, 4 real cores (and their
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# corresponding SMT threads if applicable) should be specified. More cores has been seen to, in some cases
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# drop performance further. For more details please see the documentation.
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# > Use the 'virsh capabilities' command to confim the exact CPU IDs (and SMT "siblings") for these lists.
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#
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pvc_shield_osds_enable: False
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#pvc_shield_osds_cset:
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# # This example host has 2x 6-core SMT-enabled CPUs; we want to use cores 0 (+SMT 12) and 2 (+SMT 14), which are
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# # both on physical CPU 0, for 1x OSD.
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# - hostname: pvchv1
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# osd_cset:
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# - 0
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# - 2
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# - 12
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# - 14
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# # These example hosts have 1x 8-core SMT-enabled CPUs; we want to use cores 0 (+SMT 8) and 1 (+SMT 9) for 1x OSD.
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# - hostname: pvchv2
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# osd_cset:
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# - 0
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# - 1
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# - 8
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# - 9
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# - hostname: pvchv3
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# osd_cset:
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# - 0
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# - 1
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# - 8
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# - 9
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# Configuration file networks
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# > Taken from base.yml's configuration; DO NOT MODIFY THIS SECTION.
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pvc_upstream_device: "{{ networks['upstream']['device'] }}"
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@ -138,56 +138,4 @@
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command: ceph osd crush rule create-replicated replicated_rule default osd
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when: "{{ pvc_nodes | length }} == 1"
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# System OSD CPU shielding activation
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- block:
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- name: install packages
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apt:
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name:
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- cpuset
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- numactl
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state: latest
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- name: install ceph-osd-cpuset controller config
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template:
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src: ceph/ceph-osd-cpuset-enable.j2
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dest: /etc/default/ceph-osd-cpuset
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- name: install ceph-osd-cpuset script
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template:
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src: ceph/ceph-osd-cpuset.j2
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dest: /usr/local/sbin/ceph-osd-cpuset
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mode: 0755
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- name: install ceph-osd-cpuset service unit
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template:
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src: ceph/ceph-osd-cpuset.service.j2
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dest: /etc/systemd/system/ceph-osd-cpuset.service
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register: systemd_file_cpuset
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- name: create ceph-osd override dropin directory
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file:
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dest: /etc/systemd/system/ceph-osd@.service.d
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state: directory
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- name: install ceph-osd override dropin
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template:
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src: ceph/ceph-osd-cpuset.conf.j2
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dest: /etc/systemd/system/ceph-osd@.service.d/cpuset.conf
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register: systemd_file_osd
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- name: reload systemd to apply previous changes
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command: "systemctl daemon-reload"
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when: systemd_file_cpuset.changed or systemd_file_osd.changed
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- name: enable ceph-osd-cpuset service
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service:
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name: ceph-osd-cpuset
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enabled: yes
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- debug:
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msg: "NOTICE: Any cpuset configs have NOT been applied to the running system. This node must be rebooted to apply these changes."
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tags: pvc-ceph-cpuset
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when:
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- pvc_shield_osds_enable is defined
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- meta: flush_handlers
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@ -1 +0,0 @@
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{{ pvc_shield_osds_enable }}
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@ -1,9 +0,0 @@
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# ceph-osd@.service overrides for cpuset
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# {{ ansible_managed }}
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[Service]
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# Empty the existing ExecStart value
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ExecStart =
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# Set ExecStart to launch ceph-osd via cset proc inside the osd CSET
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ExecStart = /usr/bin/cset proc --set=osd --exec /usr/bin/ceph-osd -- -f --cluster ${CLUSTER} --id %i --setuser ceph --setgroup ceph
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# Disable control group protection, as cset uses control groups
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ProtectControlGroups = false
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@ -1,79 +0,0 @@
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#!/bin/bash
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# PVC Ceph OSD cpuset preparation script
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# {{ ansible_managed }}
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# This script is designed to prepare the cpusets for use by Ceph OSDs, VMs, and other system resources.
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# Libvirt does not make this easy with any way to globally set its CPUs, so we must do this trickery.
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{% if pvc_shield_osds_cset is defined %}
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{% set cset_host = pvc_shield_osds_cset | selectattr('hostname', 'equalto', inventory_hostname) %}
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A_OSD_CPUS=( {{ cset_host[0]['osd_cset'] | join(' ') }} )
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A_SYS_CPUS=()
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{% else %}
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A_OSD_CPUS=()
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A_SYS_CPUS=()
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{% endif %}
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CPU_INFO="$( lscpu )"
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# First, we must determine how many NUMA nodes we have
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NUMA_COUNT="$( grep '^NUMA node(s)' <<<"${CPU_INFO}" | awk '{ print $NF }' )"
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# If we have 1 NUMA node, our SYS_MEMS is 0; otherwise it's 0-X
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# This is needed to explicitly set our memspec during the set
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if [[ ${NUMA_COUNT} -eq 1 ]]; then
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SYS_MEMS="0"
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else
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SYS_MEMS="0-$(( ${NUMA_COUNT} - 1 ))"
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fi
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# We must determine which NUMA nodes our OSD CPUS are in for the memspec during the set
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A_OSD_MEMS=()
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for CPU in ${A_OSD_CPUS[@]}; do
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NODE="$( grep -E '^NUMA node[0-9]+ CPU' <<<"${CPU_INFO}" | grep -w "${CPU}" | awk '{ print $2 }' | sed 's/node//' )"
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if [[ ! " ${A_OSD_MEMS} " =~ " ${NODE} " ]]; then
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A_OSD_MEMS+=( $NODE )
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fi
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done
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# Determine our CPU count
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CPU_COUNT="$( grep '^CPU(s)' <<<"${CPU_INFO}" | awk '{ print $NF }' )"
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# Loop through all the CPUs in the count; if they are not in OSD_CPUS, add them to the SYS_CPUS array
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for i in $( seq 0 $(( ${CPU_COUNT} - 1 )) ); do
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if [[ ! " ${A_OSD_CPUS[*]} " =~ " ${i} " ]]; then
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A_SYS_CPUS+=( $i )
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fi
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done
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{% raw %}
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if [[ $( cat /etc/default/ceph-osd-cpuset ) == "True" && ${#A_OSD_CPUS[@]} -gt 0 ]]; then
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{% endraw %}
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# Convert arrays into CSV
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OSD_MEMS="$( IFS=, ; echo "${A_OSD_MEMS[*]}" )"
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OSD_CPUS="$( IFS=, ; echo "${A_OSD_CPUS[*]}" )"
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SYS_CPUS="$( IFS=, ; echo "${A_SYS_CPUS[*]}" )"
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else
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# Configs installed but disabled, so use all CPUs for everything
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OSD_MEMS="${SYS_MEMS}"
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OSD_CPUS="0-$(( ${CPU_COUNT} - 1 ))"
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SYS_CPUS="0-$(( ${CPU_COUNT} - 1 ))"
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fi
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echo "Enabled: $( cat /etc/default/ceph-osd-cpuset )"
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echo "CPU count: ${CPU_COUNT}"
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echo "OSD CPUs: ${OSD_CPUS}"
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echo "OSD Mems: ${OSD_MEMS}"
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echo "System/VM CPUs: ${SYS_CPUS}"
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echo "System/VM Mems: ${SYS_MEMS}"
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# Create the system cpuset and move everything currently running into it
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/usr/bin/cset set --cpu=${SYS_CPUS} --mem=${SYS_MEMS} system
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/usr/bin/cset proc --move --force --threads root --toset=system
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# Create our Libvirt cpuset (identical to system cpuset)
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/usr/bin/cset set --cpu=${SYS_CPUS} --mem=${SYS_MEMS} machine
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# Create our OSD cpuset
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/usr/bin/cset set --cpu=${OSD_CPUS} --mem=${OSD_MEMS} osd
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@ -1,12 +0,0 @@
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# PVC Ceph OSD cpuset service unit
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# {{ ansible_managed }}
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[Unit]
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Description = Ceph OSD cpuset shield creation
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Before = ceph-osd@.service libvirtd.service
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[Service]
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Type = oneshot
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ExecStart = /usr/local/sbin/ceph-osd-cpuset
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[Install]
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WantedBy = ceph.target
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