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diff --git a/docs/release/userguide/feature.userguide.rst b/docs/release/userguide/feature.userguide.rst new file mode 100644 index 00000000..2be44d33 --- /dev/null +++ b/docs/release/userguide/feature.userguide.rst @@ -0,0 +1,855 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International License. +.. http://creativecommons.org/licenses/by/4.0 +.. (c) <optionally add copywriters name> + +=================================== +OPNFV Barometer User Guide +=================================== + +.. contents:: + :depth: 3 + :local: + +Barometer collectd plugins description +--------------------------------------- +.. Describe the specific features and how it is realised in the scenario in a brief manner +.. to ensure the user understand the context for the user guide instructions to follow. + +collectd is a daemon which collects system performance statistics periodically +and provides a variety of mechanisms to publish the collected metrics. It +supports more than 90 different input and output plugins. Input plugins +retrieve metrics and publish them to the collectd deamon, while output plugins +publish the data they receive to an end point. collectd also has infrastructure +to support thresholding and notification. + +Barometer has enabled the following collectd plugins: + +* *dpdkstat plugin*: A read plugin that retrieve stats from the DPDK extended + NIC stats API. + +* `ceilometer plugin`_: A write plugin that pushes the retrieved stats to + Ceilometer. It's capable of pushing any stats read through collectd to + Ceilometer, not just the DPDK stats. + +* *hugepages plugin*: A read plugin that retrieves the number of available + and free hugepages on a platform as well as what is available in terms of + hugepages per socket. + +* *RDT plugin*: A read plugin that provides the last level cache utilitzation and + memory bandwidth utilization + +* *Open vSwitch events Plugin*: A read plugin that retrieves events from OVS. + +* *mcelog plugin*: A read plugin that uses mcelog client protocol to check for + memory Machine Check Exceptions and sends the stats for reported exceptions + +All the plugins above are available on the collectd master, except for the +plugin as it's a python based plugin and only C plugins are accepted +by the collectd community. The ceilometer plugin lives in the OpenStack +repositories. + +Other plugins under development or existing as a pull request into collectd master: + +* *dpdkevents*: A read plugin that retrieves DPDK link status and DPDK + forwarding cores liveliness status (DPDK Keep Alive). + +* *Open vSwitch stats Plugin*: A read plugin that retrieve flow and interface + stats from OVS. + +* *SNMP Agent*: A write plugin that will act as a AgentX subagent that receives + and handles queries from SNMP master agent and returns the data collected + by read plugins. The SNMP Agent plugin handles requests only for OIDs + specified in configuration file. To handle SNMP queries the plugin gets data + from collectd and translates requested values from collectd's internal format + to SNMP format. Supports SNMP: get, getnext and walk requests. + +* *Legacy/IPMI*: A read plugin that reports platform thermals, voltages, + fanspeed, current, flow, power etc. Also, the plugin monitors Intelligent + Platform Management Interface (IPMI) System Event Log (SEL) and sends the + +**Plugins included in the Danube release:** + +* Hugepages +* Open vSwitch Events +* Ceilometer +* Mcelog + +collectd capabilities and usage +------------------------------------ +.. Describe the specific capabilities and usage for <XYZ> feature. +.. Provide enough information that a user will be able to operate the feature on a deployed scenario. + +**NOTE** Plugins included in the OPNFV D release will be built-in to the fuel +plugin and available in the /opt/opnfv directory on the fuel master. You don't +need to clone the barometer/collectd repos to use these, but you can configure +them as shown in the examples below. Please note, the collectd plugins in OPNFV +are configured with reasonable defaults, but can be overriden. + +Building all Barometer upstreamed plugins from scratch +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +The plugins that have been merged to the collectd master branch can all be +built and configured through the barometer repository. + +**NOTE: sudo permissions are required to install collectd.** + +**NOTE: These are instructions for Ubuntu 16.04.** + +To build and install these dependencies, clone the barometer repo: + +.. code:: c + + $ git clone https://gerrit.opnfv.org/gerrit/barometer + +Install the build dependencies + +.. code:: bash + + $ ./src/install_build_deps.sh + +To install collectd as a service and install all it's dependencies: + +.. code:: bash + + $ cd barometer/src && sudo make && sudo make install + +This will install collectd as a service and the base install directory +is /opt/collectd. + +Sample configuration files can be found in '/opt/collectd/etc/collectd.conf.d' + +**Note**: Exec plugin requires non-root user to execute scripts. By default, +`collectd_exec` user is used. Barometer scripts do *not* create this user. It +needs to be manually added or exec plugin configuration has to be changed to use +other, existing user before starting collectd service. + +Please note if you are using any Open vSwitch plugins you need to run: + + +.. code:: bash + + $ sudo ovs-vsctl set-manager ptcp:6640 + +DPDK statistics plugin +^^^^^^^^^^^^^^^^^^^^^^ +Repo: https://github.com/collectd/collectd + +Branch: master + +Dependencies: DPDK (http://dpdk.org/) + +To build and install DPDK to /usr please see: +https://github.com/collectd/collectd/blob/master/docs/BUILD.dpdkstat.md + +Building and installing collectd: + +.. code:: bash + + $ git clone https://github.com/collectd/collectd.git + $ cd collectd + $ ./build.sh + $ ./configure --enable-syslog --enable-logfile --enable-debug + $ make + $ sudo make install + + +This will install collectd to /opt/collectd +The collectd configuration file can be found at /opt/collectd/etc +To configure the hugepages plugin you need to modify the configuration file to +include: + +.. code:: bash + + LoadPlugin dpdkstat + <Plugin dpdkstat> + Coremask "0xf" + ProcessType "secondary" + FilePrefix "rte" + EnabledPortMask 0xffff + </Plugin> + +For more information on the plugin parameters, please see: +https://github.com/collectd/collectd/blob/master/src/collectd.conf.pod + +Please note if you are configuring collectd with the **static DPDK library** +you must compile the DPDK library with the -fPIC flag: + +.. code:: bash + + $ make EXTRA_CFLAGS=-fPIC + +You must also modify the configuration step when building collectd: + +.. code:: bash + + $ ./configure CFLAGS=" -lpthread -Wl,--whole-archive -Wl,-ldpdk -Wl,-lm -Wl,-lrt -Wl,-lpcap -Wl,-ldl -Wl,--no-whole-archive" + +Please also note that if you are not building and installing DPDK system-wide +you will need to specify the specific paths to the header files and libraries +using LIBDPDK_CPPFLAGS and LIBDPDK_LDFLAGS. You will also need to add the DPDK +library symbols to the shared library path using ldconfig. Note that this +update to the shared library path is not persistant (i.e. it will not survive a +reboot). Pending a merge of https://github.com/collectd/collectd/pull/2073. + +.. code:: bash + + $ ./configure LIBDPDK_CPPFLAGS="path to DPDK header files" LIBDPDK_LDFLAGS="path to DPDK libraries" + +Hugepages Plugin +^^^^^^^^^^^^^^^^^ +Repo: https://github.com/collectd/collectd + +Branch: master + +Dependencies: None, but assumes hugepages are configured. + +To configure some hugepages: + +.. code:: bash + + sudo mkdir -p /mnt/huge + sudo mount -t hugetlbfs nodev /mnt/huge + sudo echo 14336 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages + +Building and installing collectd: + +.. code:: bash + + $ git clone https://github.com/collectd/collectd.git + $ cd collectd + $ ./build.sh + $ ./configure --enable-syslog --enable-logfile --enable-hugepages --enable-debug + $ make + $ sudo make install + +This will install collectd to /opt/collectd +The collectd configuration file can be found at /opt/collectd/etc +To configure the hugepages plugin you need to modify the configuration file to +include: + +.. code:: bash + + LoadPlugin hugepages + <Plugin hugepages> + ReportPerNodeHP true + ReportRootHP true + ValuesPages true + ValuesBytes false + ValuesPercentage false + </Plugin> + +For more information on the plugin parameters, please see: +https://github.com/collectd/collectd/blob/master/src/collectd.conf.pod + +Intel RDT Plugin +^^^^^^^^^^^^^^^^ +Repo: https://github.com/collectd/collectd + +Branch: master + +Dependencies: + + * PQoS/Intel RDT library https://github.com/01org/intel-cmt-cat.git + * msr kernel module + +Building and installing PQoS/Intel RDT library: + +.. code:: bash + + $ git clone https://github.com/01org/intel-cmt-cat.git + $ cd intel-cmt-cat + $ make + $ make install PREFIX=/usr + +You will need to insert the msr kernel module: + +.. code:: bash + + $ modprobe msr + +Building and installing collectd: + +.. code:: bash + + $ git clone https://github.com/collectd/collectd.git + $ cd collectd + $ ./build.sh + $ ./configure --enable-syslog --enable-logfile --with-libpqos=/usr/ --enable-debug + $ make + $ sudo make install + +This will install collectd to /opt/collectd +The collectd configuration file can be found at /opt/collectd/etc +To configure the RDT plugin you need to modify the configuration file to +include: + +.. code:: bash + + <LoadPlugin intel_rdt> + Interval 1 + </LoadPlugin> + <Plugin "intel_rdt"> + Cores "" + </Plugin> + +For more information on the plugin parameters, please see: +https://github.com/collectd/collectd/blob/master/src/collectd.conf.pod + +IPMI Plugin +^^^^^^^^^^^^ +Repo: https://github.com/maryamtahhan/collectd + +Branch: feat_ipmi_events, feat_ipmi_analog + +Dependencies: OpenIPMI library + +The IPMI plugin is already implemented in the latest collectd and sensors +like temperature, voltage, fanspeed, current are already supported there. +The list of supported IPMI sensors has been extended and sensors like flow, +power are supported now. Also, a System Event Log (SEL) notification feature +has been introduced. + +* The feat_ipmi_events branch includes new SEL feature support in collectd + IPMI plugin. If this feature is enabled, the collectd IPMI plugin will + dispatch notifications about new events in System Event Log. + +* The feat_ipmi_analog branch includes the support of extended IPMI sensors in + collectd IPMI plugin. + +On Ubuntu, install the dependencies: + +.. code:: bash + + $ sudo apt-get install libopenipmi-dev + +Enable IPMI support in the kernel: + +.. code:: bash + + $ sudo modprobe ipmi_devintf + $ sudo modprobe ipmi_si + +**Note**: If HW supports IPMI, the ``/dev/ipmi0`` character device will be +created. + +Clone and install the collectd IPMI plugin: + +.. code:: bash + + $ git clone https://github.com/maryamtahhan/collectd + $ cd collectd + $ git checkout $BRANCH + $ ./build.sh + $ ./configure --enable-syslog --enable-logfile --enable-debug + $ make + $ sudo make install + +Where $BRANCH is feat_ipmi_events or feat_ipmi_analog. + +This will install collectd to default folder ``/opt/collectd``. The collectd +configuration file (``collectd.conf``) can be found at ``/opt/collectd/etc``. To +configure the IPMI plugin you need to modify the file to include: + +.. code:: bash + + LoadPlugin ipmi + <Plugin ipmi> + SELEnabled true # only feat_ipmi_events branch supports this + </Plugin> + +**Note**: By default, IPMI plugin will read all available analog sensor values, +dispatch the values to collectd and send SEL notifications. + +For more information on the IPMI plugin parameters and SEL feature configuration, +please see: +https://github.com/maryamtahhan/collectd/blob/feat_ipmi_events/src/collectd.conf.pod + +Extended analog sensors support doesn't require additional configuration. The usual +collectd IPMI documentation can be used: + +- https://collectd.org/wiki/index.php/Plugin:IPMI +- https://collectd.org/documentation/manpages/collectd.conf.5.shtml#plugin_ipmi + +IPMI documentation: + +- https://www.kernel.org/doc/Documentation/IPMI.txt +- http://www.intel.com/content/www/us/en/servers/ipmi/ipmi-second-gen-interface-spec-v2-rev1-1.html + +Mcelog Plugin +^^^^^^^^^^^^^^ +Repo: https://github.com/collectd/collectd + +Branch: master + +Dependencies: mcelog + +Start by installing mcelog. Note: The kernel has to have CONFIG_X86_MCE +enabled. For 32bit kernels you need at least a 2.6,30 kernel. + +On ubuntu: + +.. code:: bash + + $ apt-get update && apt-get install mcelog + +Or build from source + +.. code:: bash + + $ git clone git://git.kernel.org/pub/scm/utils/cpu/mce/mcelog.git + $ cd mcelog + $ make + ... become root ... + $ make install + $ cp mcelog.service /etc/systemd/system/ + $ systemctl enable mcelog.service + $ systemctl start mcelog.service + + +Verify you got a /dev/mcelog. You can verify the daemon is running completely +by running: + +.. code:: bash + + $ mcelog --client + +This should query the information in the running daemon. If it prints nothing +that is fine (no errors logged yet). More info @ +http://www.mcelog.org/installation.html + +Modify the mcelog configuration file "/etc/mcelog/mcelog.conf" to include or +enable: + +.. code:: bash + + socket-path = /var/run/mcelog-client + +Clone and install the collectd mcelog plugin: + +.. code:: bash + + $ git clone https://github.com/maryamtahhan/collectd + $ cd collectd + $ git checkout feat_ras + $ ./build.sh + $ ./configure --enable-syslog --enable-logfile --enable-debug + $ make + $ sudo make install + +This will install collectd to /opt/collectd +The collectd configuration file can be found at /opt/collectd/etc +To configure the mcelog plugin you need to modify the configuration file to +include: + +.. code:: bash + + <LoadPlugin mcelog> + Interval 1 + </LoadPlugin> + <Plugin "mcelog"> + McelogClientSocket "/var/run/mcelog-client" + </Plugin> + +For more information on the plugin parameters, please see: +https://github.com/maryamtahhan/collectd/blob/feat_ras/src/collectd.conf.pod + +Simulating a Machine Check Exception can be done in one of 3 ways: + +* Running $make test in the mcelog cloned directory - mcelog test suite +* using mce-inject +* using mce-test + +**mcelog test suite:** + +It is always a good idea to test an error handling mechanism before it is +really needed. mcelog includes a test suite. The test suite relies on +mce-inject which needs to be installed and in $PATH. + +You also need the mce-inject kernel module configured (with +CONFIG_X86_MCE_INJECT=y), compiled, installed and loaded: + +.. code:: bash + + $ modprobe mce-inject + +Then you can run the mcelog test suite with + +.. code:: bash + + $ make test + +This will inject different classes of errors and check that the mcelog triggers +runs. There will be some kernel messages about page offlining attempts. The +test will also lose a few pages of memory in your system (not significant) +**Note this test will kill any running mcelog, which needs to be restarted +manually afterwards**. +**mce-inject:** + +A utility to inject corrected, uncorrected and fatal machine check exceptions + +.. code:: bash + + $ git clone https://git.kernel.org/pub/scm/utils/cpu/mce/mce-inject.git + $ cd mce-inject + $ make + $ modprobe mce-inject + +Modify the test/corrected script to include the following: + +.. code:: bash + + CPU 0 BANK 0 + STATUS 0xcc00008000010090 + ADDR 0x0010FFFFFFF + +Inject the error: +.. code:: bash + + $ ./mce-inject < test/corrected + +**Note: the uncorrected and fatal scripts under test will cause a platform reset. +Only the fatal script generates the memory errors**. In order to quickly +emulate uncorrected memory errors and avoid host reboot following test errors +from mce-test suite can be injected: + +.. code:: bash + + $ mce-inject mce-test/cases/coverage/soft-inj/recoverable_ucr/data/srao_mem_scrub + +**mce-test:** + +In addition an more in-depth test of the Linux kernel machine check facilities +can be done with the mce-test test suite. mce-test supports testing uncorrected +error handling, real error injection, handling of different soft offlining +cases, and other tests. + +**Corrected memory error injection:** + +To inject corrected memory errors: + +* Remove sb_edac and edac_core kernel modules: rmmod sb_edac rmmod edac_core +* Insert einj module: modprobe einj param_extension=1 +* Inject an error by specifying details (last command should be repeated at least two times): + +.. code:: bash + + $ APEI_IF=/sys/kernel/debug/apei/einj + $ echo 0x8 > $APEI_IF/error_type + $ echo 0x01f5591000 > $APEI_IF/param1 + $ echo 0xfffffffffffff000 > $APEI_IF/param2 + $ echo 1 > $APEI_IF/notrigger + $ echo 1 > $APEI_IF/error_inject + +* Check the MCE statistic: mcelog --client. Check the mcelog log for injected error details: less /var/log/mcelog. + +Open vSwitch Plugins +^^^^^^^^^^^^^^^^^^^^^ +OvS Events Repo: https://github.com/collectd/collectd + +OvS Stats Repo: https://github.com/maryamtahhan/collectd + +OvS Events Branch: master + +OvS Stats Branch:feat_ovs_stats + +Dependencies: Open vSwitch, libyajl + +On Ubuntu, install the dependencies: + +.. code:: bash + + $ sudo apt-get install libyajl-dev openvswitch-switch + +Start the Open vSwitch service: + +.. code:: bash + + $ sudo service openvswitch-switch start + +configure the ovsdb-server manager: + +.. code:: bash + + $ sudo ovs-vsctl set-manager ptcp:6640 + +Clone and install the collectd ovs 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 is one of the repos listed at the top of this section. + +Where $BRANCH is master or feat_ovs_stats. + +This will install collectd to /opt/collectd. The collectd configuration file +can be found at /opt/collectd/etc. To configure the OVS events plugin you +need to modify the configuration file to include: + +.. code:: bash + + <LoadPlugin ovs_events> + Interval 1 + </LoadPlugin> + <Plugin "ovs_events"> + Port 6640 + Socket "/var/run/openvswitch/db.sock" + Interfaces "br0" "veth0" + SendNotification false + </Plugin> + +To configure the OVS stats plugin you need to modify the configuration file +to include: + +.. code:: bash + + <LoadPlugin ovs_stats> + Interval 1 + </LoadPlugin> + <Plugin ovs_stats> + Port "6640" + Address "127.0.0.1" + Socket "/var/run/openvswitch/db.sock" + Bridges "br0" "br_ext" + </Plugin> + +For more information on the plugin parameters, please see: +https://github.com/collectd/collectd/blob/master/src/collectd.conf.pod +and +https://github.com/maryamtahhan/collectd/blob/feat_ovs_stats/src/collectd.conf.pod + +SNMP Agent Plugin +^^^^^^^^^^^^^^^^^ +Repo: https://github.com/maryamtahhan/collectd/ + +Branch: feat_snmp + +Dependencies: NET-SNMP library + +Start by installing net-snmp and dependencies. + +On ubuntu: + +.. code:: bash + + $ apt-get install snmp snmp-mibs-downloader snmpd libsnmp-dev + $ systemctl start snmpd.service + +Or build from source + +Become root to install net-snmp dependencies + +.. code:: bash + + $ apt-get install libperl-dev + +Clone and build net-snmp + +.. code:: bash + + $ git clone https://github.com/haad/net-snmp.git + $ cd net-snmp + $ ./configure --with-persistent-directory="/var/net-snmp" --with-systemd --enable-shared --prefix=/usr + $ make + +Become root + +.. code:: bash + + $ make install + +Copy default configuration to persistent folder + +.. code:: bash + + $ cp EXAMPLE.conf /usr/share/snmp/snmpd.conf + +Set library path and default MIB configuration + +.. code:: bash + + $ cd ~/ + $ echo export LD_LIBRARY_PATH=/usr/lib >> .bashrc + $ net-snmp-config --default-mibdirs + $ net-snmp-config --snmpconfpath + +Configure snmpd as a service + +.. code:: bash + + $ cd net-snmp + $ cp ./dist/snmpd.service /etc/systemd/system/ + $ systemctl enable snmpd.service + $ systemctl start snmpd.service + +Add the following line to snmpd.conf configuration file +"/usr/share/snmp/snmpd.conf" to make all OID tree visible for SNMP clients: + +.. code:: bash + + view systemonly included .1 + +To verify that SNMP is working you can get IF-MIB table using SNMP client +to view the list of Linux interfaces: + +.. code:: bash + + $ snmpwalk -v 2c -c public localhost IF-MIB::interfaces + +Clone and install the collectd snmp_agent plugin: + +.. code:: bash + + $ git clone https://github.com/maryamtahhan/collectd + $ cd collectd + $ git checkout feat_snmp + $ ./build.sh + $ ./configure --enable-syslog --enable-logfile --enable-debug --enable-snmp --with-libnetsnmp + $ make + $ sudo make install + +This will install collectd to /opt/collectd +The collectd configuration file can be found at /opt/collectd/etc +**SNMP Agent plugin is a generic plugin and cannot work without configuration**. +To configure the snmp_agent plugin you need to modify the configuration file to +include OIDs mapped to collectd types. The following example maps scalar +memAvailReal OID to value represented as free memory type of memory plugin: + +.. code:: bash + + LoadPlugin snmp_agent + <Plugin "snmp_agent"> + <Data "memAvailReal"> + Plugin "memory" + Type "memory" + TypeInstance "free" + OIDs "1.3.6.1.4.1.2021.4.6.0" + </Data> + </Plugin> + +For more information on the plugin parameters, please see: +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/ + +Installing collectd as a service +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +**NOTE**: In an OPNFV installation, collectd is installed and configured as a +service. + +Collectd service scripts are available in the collectd/contrib directory. +To install collectd as a service: + +.. code:: bash + + $ sudo cp contrib/systemd.collectd.service /etc/systemd/system/ + $ cd /etc/systemd/system/ + $ sudo mv systemd.collectd.service collectd.service + $ sudo chmod +x collectd.service + +Modify collectd.service + +.. code:: bash + + [Service] + ExecStart=/opt/collectd/sbin/collectd + EnvironmentFile=-/opt/collectd/etc/ + EnvironmentFile=-/opt/collectd/etc/ + CapabilityBoundingSet=CAP_SETUID CAP_SETGID + +Reload + +.. code:: bash + + $ sudo systemctl daemon-reload + $ sudo systemctl start collectd.service + $ sudo systemctl status collectd.service should show success + +Additional useful plugins +^^^^^^^^^^^^^^^^^^^^^^^^^^ + +* **Exec Plugin** : Can be used to show you when notifications are being + generated by calling a bash script that dumps notifications to file. (handy + for debug). Modify /opt/collectd/etc/collectd.conf: + +.. code:: bash + + LoadPlugin exec + <Plugin exec> + # Exec "user:group" "/path/to/exec" + NotificationExec "user" "<path to barometer>/barometer/src/collectd/collectd_sample_configs/write_notification.sh" + </Plugin> + +write_notification.sh (just writes the notification passed from exec through +STDIN to a file (/tmp/notifications)): + +.. code:: bash + + #!/bin/bash + rm -f /tmp/notifications + while read x y + do + echo $x$y >> /tmp/notifications + done + +output to /tmp/notifications should look like: + +.. code:: bash + + Severity:WARNING + Time:1479991318.806 + Host:localhost + Plugin:ovs_events + PluginInstance:br-ex + Type:gauge + TypeInstance:link_status + uuid:f2aafeec-fa98-4e76-aec5-18ae9fc74589 + + linkstate of "br-ex" interface has been changed to "DOWN" + +* **logfile plugin**: Can be used to log collectd activity. Modify + /opt/collectd/etc/collectd.conf to include: + +.. code:: bash + + LoadPlugin logfile + <Plugin logfile> + LogLevel info + File "/var/log/collectd.log" + Timestamp true + PrintSeverity false + </Plugin> + + +Monitoring Interfaces and Openstack Support +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +.. Figure:: monitoring_interfaces.png + + Monitoring Interfaces and Openstack Support + +The figure above shows the DPDK L2 forwarding application running on a compute +node, sending and receiving traffic. collectd is also running on this compute +node retrieving the stats periodically from DPDK through the dpdkstat plugin +and publishing the retrieved stats to Ceilometer through the ceilometer plugin. + +To see this demo in action please checkout: `Barometer OPNFV Summit demo`_ + +References +^^^^^^^^^^^ +.. [1] https://collectd.org/wiki/index.php/Naming_schema +.. [2] https://github.com/collectd/collectd/blob/master/src/daemon/plugin.h +.. [3] https://collectd.org/wiki/index.php/Value_list_t +.. [4] https://collectd.org/wiki/index.php/Data_set +.. [5] https://collectd.org/documentation/manpages/types.db.5.shtml +.. [6] https://collectd.org/wiki/index.php/Data_source +.. [7] https://collectd.org/wiki/index.php/Meta_Data_Interface + +.. _Barometer OPNFV Summit demo: https://prezi.com/kjv6o8ixs6se/software-fastpath-service-quality-metrics-demo/ +.. _ceilometer plugin: https://github.com/openstack/collectd-ceilometer-plugin/tree/stable/mitaka + |