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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/userguide/collectd.userguide.rst | 228 |
1 files changed, 223 insertions, 5 deletions
diff --git a/docs/userguide/collectd.userguide.rst b/docs/userguide/collectd.userguide.rst index 2dcb3593..ea09bb1a 100644 --- a/docs/userguide/collectd.userguide.rst +++ b/docs/userguide/collectd.userguide.rst @@ -20,8 +20,6 @@ Barometer has enabled the following collectd plugins: * 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. - All the plugins above are available on the collectd master, except for the ceilometer 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 @@ -32,6 +30,8 @@ Other plugins under development or existing as a pull request into collectd mast * dpdkevents: A read plugin that retrieves DPDK link status and DPDK forwarding cores liveliness status (DPDK Keep Alive). +* Open vSwitch events Plugin: A read plugin that retrieves events from OVS. + * Open vSwitch stats Plugin: A read plugin that retrieve flow and interface stats from OVS. @@ -48,9 +48,9 @@ Other plugins under development or existing as a pull request into collectd mast Building collectd with the Barometer plugins and installing the dependencies ============================================================================= -All plugins ------------ -The plugins that have been merged to the baromter master branch can all be +All Upstreamed plugins +----------------------- +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. @@ -246,6 +246,224 @@ include: For more information on the plugin parameters, please see: https://github.com/collectd/collectd/blob/master/src/collectd.conf.pod +Mcelog Plugin: +-------------- +Repo: https://github.com/maryamtahhan/collectd + +Branch: feat_ras + +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 + $ ./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 +--------------------- +Repo: https://github.com/maryamtahhan/collectd + +Branch: feat_ovs_link, 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 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_ovs_link 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 plugins 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> + +For more information on the plugin parameters, please see: +https://github.com/maryamtahhan/collectd/blob/feat_ovs_link/src/collectd.conf.pod +and +https://github.com/maryamtahhan/collectd/blob/feat_ovs_stats/src/collectd.conf.pod + Installing collectd as a service -------------------------------- Collectd service scripts are available in the collectd/contrib directory. |