.. This work is licensed under a Creative Commons Attribution 4.0 International License. .. http://creativecommons.org/licenses/by/4.0 .. (c) =================================== 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 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 Coremask "0xf" ProcessType "secondary" FilePrefix "rte" EnabledPortMask 0xffff 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 ReportPerNodeHP true ReportRootHP true ValuesPages true ValuesBytes false ValuesPercentage false 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 Interval 1 Cores "" 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 SELEnabled true # only feat_ipmi_events branch supports this **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 Interval 1 McelogClientSocket "/var/run/mcelog-client" 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 Interval 1 Port 6640 Socket "/var/run/openvswitch/db.sock" Interfaces "br0" "veth0" SendNotification false To configure the OVS stats plugin you need to modify the configuration file to include: .. code:: bash Interval 1 Port "6640" Address "127.0.0.1" Socket "/var/run/openvswitch/db.sock" Bridges "br0" "br_ext" 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 "memory" Type "memory" TypeInstance "free" OIDs "1.3.6.1.4.1.2021.4.6.0" 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 # Exec "user:group" "/path/to/exec" NotificationExec "user" "/barometer/src/collectd/collectd_sample_configs/write_notification.sh" 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 LogLevel info File "/var/log/collectd.log" Timestamp true PrintSeverity false 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