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| -rw-r--r-- | docs/release/userguide/feature.userguide.rst | 139 |
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diff --git a/docs/release/userguide/feature.userguide.rst b/docs/release/userguide/feature.userguide.rst index f81df904..7bd60478 100644 --- a/docs/release/userguide/feature.userguide.rst +++ b/docs/release/userguide/feature.userguide.rst @@ -67,6 +67,9 @@ Other plugins existing as a pull request into collectd master: fanspeed, current, flow, power etc. Also, the plugin monitors Intelligent Platform Management Interface (IPMI) System Event Log (SEL) and sends the +* *virt*: A read plugin that uses virtualization API *libvirt* to gather + statistics about virtualized guests on a system directly from the hypervisor, + without a need to install collectd instance on the guest. **Plugins included in the Danube release:** @@ -853,6 +856,142 @@ https://github.com/maryamtahhan/collectd/blob/feat_snmp/src/collectd.conf.pod For more details on AgentX subagent, please see: http://www.net-snmp.org/tutorial/tutorial-5/toolkit/demon/ +virt plugin +^^^^^^^^^^^^ +Repo: https://github.com/maryamtahhan/collectd + +Branch: feat_libvirt_upstream + +Dependencies: libvirt (https://libvirt.org/), libxml2 + +On Ubuntu, install the dependencies: + +.. code:: bash + + $ sudo apt-get install libxml2-dev + +Install libvirt: + +libvirt version in package manager might be quite old and offer only limited +functionality. Hence, building and installing libvirt from sources is recommended. +Detailed instructions can bet found at: +https://libvirt.org/compiling.html + +Certain metrics provided by the plugin have a requirement on a minimal version of +the libvirt API. *File system information* statistics require a *Guest Agent (GA)* +to be installed and configured in a VM. User must make sure that installed GA +version supports retrieving file system information. Number of *Performance monitoring events* +metrics depends on running libvirt daemon version. + +.. note:: Please keep in mind that RDT metrics (part of *Performance monitoring + events*) have to be supported by hardware. For more details on hardware support, + please see: + https://github.com/01org/intel-cmt-cat + + Additionally perf metrics **cannot** be collected if *Intel RDT* plugin is enabled. + +libvirt version can be checked with following commands: + +.. code:: bash + + $ virsh --version + $ libvirtd --version + +.. table:: Extended statistics requirements + + +-------------------------------+--------------------------+-------------+ + | Statistic | Min. libvirt API version | Requires GA | + +===============================+==========================+=============+ + | Domain reason | 0.9.2 | No | + +-------------------------------+--------------------------+-------------+ + | Disk errors | 0.9.10 | No | + +-------------------------------+--------------------------+-------------+ + | Job statistics | 1.2.9 | No | + +-------------------------------+--------------------------+-------------+ + | File system information | 1.2.11 | Yes | + +-------------------------------+--------------------------+-------------+ + | Performance monitoring events | 1.3.3 | No | + +-------------------------------+--------------------------+-------------+ + +Start libvirt daemon: + +.. code:: bash + + $ systemctl start libvirtd + +Create domain (VM) XML configuration file. For more information on domain XML +format and examples, please see: +https://libvirt.org/formatdomain.html + +.. note:: Installing additional hypervisor dependencies might be required before + deploying virtual machine. + +Create domain, based on created XML file: + +.. code:: bash + + $ virsh define DOMAIN_CFG_FILE.xml + +Start domain: + +.. code:: bash + + $ virsh start DOMAIN_NAME + +Check if domain is running: + +.. code:: bash + + $ virsh list + +Check list of available *Performance monitoring events* and their settings: + +.. code:: bash + + $ virsh perf DOMAIN_NAME + +Enable or disable *Performance monitoring events* for domain: + +.. code:: bash + + $ virsh perf DOMAIN_NAME [--enable | --disable] EVENT_NAME --live + +Clone and install the collectd virt plugin: + +.. code:: bash + + $ git clone $REPO + $ cd collectd + $ git checkout $BRANCH + $ ./build.sh + $ ./configure --enable-syslog --enable-logfile --enable-debug + $ make + $ sudo make install + +Where ``$REPO`` and ``$BRANCH`` are equal to information provided above. + +This will install collectd to ``/opt/collectd``. The collectd configuration file +``collectd.conf`` can be found at ``/opt/collectd/etc``. To load the virt plugin +user needs to modify the configuration file to include: + +.. code:: bash + + LoadPlugin virt + +Additionally, user can specify plugin configuration parameters in this file, +such as connection URI, domain name and much more. By default extended virt plugin +statistics are disabled. They can be enabled with ``ExtraStats`` option. + +.. code:: bash + + <Plugin virt> + RefreshInterval 60 + ExtraStats "cpu_util disk disk_err domain_state fs_info job_stats_background pcpu perf vcpupin" + </Plugin> + +For more information on the plugin parameters, please see: +https://github.com/maryamtahhan/collectd/blob/feat_libvirt_upstream/src/collectd.conf.pod + Installing collectd as a service ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ **NOTE**: In an OPNFV installation, collectd is installed and configured as a |