[dpdk] Remove dpdkstats and dpdkevents plugins

Remove old dpdk plugins, since they are superceeded by dpdk_telemetry
plugin.

JIRA: https://jira.anuket.io/browse/BAROMETER-183
Change-Id: Ie4abf2b1fe37a2197d9d5dd01820ac8b0d01df6d
Signed-off-by: Emma Foley <efoley@redhat.com>

4 files changed, 39 insertions, 91 deletions

diff --git a/docs/release/release-notes/notes/remove_dpdk_stats_events_plugins-59f366855f6e4261.yaml b/docs/release/release-notes/notes/remove_dpdk_stats_events_plugins-59f366855f6e4261.yaml
new file mode 100644
index 00000000..78ab1c4c
--- /dev/null
+++ b/docs/release/release-notes/notes/remove_dpdk_stats_events_plugins-59f366855f6e4261.yaml
@@ -0,0 +1,8 @@
+---
+release_summary: >
+  Remove dpdkstats and dpdkevents from Barometer.
+deprecations:
+  - |
+    The dpdkstats and dpdkevents plugins were removed from Barometer. These
+    plugins are still available in collectd, however, will not be deployed by
+    Barometer. It is recommended that the DPDK telemetry plugin be used instead.
diff --git a/docs/release/userguide/feature.userguide.rst b/docs/release/userguide/feature.userguide.rst
index 02f8bdaa..2750bd8d 100644
--- a/docs/release/userguide/feature.userguide.rst
+++ b/docs/release/userguide/feature.userguide.rst
@@ -22,26 +22,15 @@ to support thresholding and notification.
 
 Barometer has enabled the following collectd plugins:
 
-* *dpdkstat plugin*: A read plugin that retrieves stats from the DPDK extended
-  NIC stats API.
-
-* *dpdkevents plugin*:  A read plugin that retrieves DPDK link status and DPDK
-  forwarding cores liveliness status (DPDK Keep Alive).
-
 * *dpdk_telemetry plugin*:  A read plugin to collect dpdk interface stats and
-  application or global stats from dpdk telemetry library. Both 'dpdkstat' and
-  'dpdk_telemetry' plugins provides dpdk NIC Stats, but only 'dpdk_telemetry'
-  provides the DPDK Application stats. So in other words, 'dpdk_telemetry' is
-  an advanced version of dpdkstat. This plugin don't deal with dpdk events.
-  So not in related with 'dpdkevents' plugin. The mimimum dpdk version required
-  to use this plugin is 19.08.
+  application or global stats from dpdk telemetry library. The ``dpdk_telemetry``
+  plugin provides both DPDK NIC Stats and DPDK application stats.
+  This plugin doesn't deal with dpdk events.
+  The mimimum dpdk version required to use this plugin is 19.08.
 
 .. note::
-  dpdpkstat and dpdk_telemetry should not be used together. Use dpdk_telemetry
-  if your version of dpdk supports it (i.e. DPDK >= 19.08) and use dpdkstat otherwise.
-  dpdkstat, dpdkevents and dpdk_telemetry plugins should only be used if your dpdk
-  application doesn't already have more relevant metrics available(e.g.ovs_stats).
-
+  The ``dpdk_telemetry`` plugin should only be used if your dpdk application
+  doesn't already have more relevant metrics available (e.g.ovs_stats).
 
 * `gnocchi plugin`_: A write plugin that pushes the retrieved stats to
   Gnocchi. It's capable of pushing any stats read through collectd to
@@ -175,15 +164,15 @@ collectd, check out the `collectd-openstack-plugins GSG`_.
 Below is the per plugin installation and configuration guide, if you only want
 to install some/particular plugins.
 
-DPDK plugins
-^^^^^^^^^^^^^
+DPDK telemetry plugin
+^^^^^^^^^^^^^^^^^^^^^
 Repo: https://github.com/collectd/collectd
 
 Branch: main
 
-Dependencies: `DPDK <https://www.dpdk.org/>`_
+Dependencies: `DPDK <https://www.dpdk.org/>`_ (runtime), libjansson (compile-time)
 
-.. note:: DPDK statistics plugin requires DPDK version 16.04 or later.
+.. note:: DPDK telemetry plugin requires DPDK version 19.08 or later.
 
 To build and install DPDK to /usr please see:
 https://github.com/collectd/collectd/blob/main/docs/BUILD.dpdkstat.md
@@ -199,53 +188,35 @@ Building and installing collectd:
     $ make
     $ sudo make install
 
-.. note:: If DPDK was installed in a non standard location you will need to
-    specify 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).
-
-Example of specifying custom paths to DPDK headers and libraries:
-
-.. code:: bash
-
-    $ ./configure LIBDPDK_CPPFLAGS="path to DPDK header files" LIBDPDK_LDFLAGS="path to DPDK libraries"
-
 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 dpdkstats plugin you need to modify the configuration file to
-include (uncomment lines as appropriate):
 
-.. literalinclude:: ../../../src/collectd/collectd_sample_configs/dpdkstat.conf
-   :start-at: LoadPlugin
-   :language: bash
+To configure the dpdk_telemetry plugin you need to modify the configuration file to
+include:
 
-To configure the dpdkevents plugin you need to modify the configuration file to
-include (uncomment lines as appropriate):
+.. code:: bash
 
-.. literalinclude:: ../../../src/collectd/collectd_sample_configs/dpdkevents.conf
-   :start-at: LoadPlugin
-   :language: bash
+    LoadPlugin dpdk_telemetry
+    <Plugin dpdk_telemetry>
+      #ClientSocketPath "/var/run/.client"
+      #DpdkSocketPath "/var/run/dpdk/rte/telemetry"
+    </Plugin>
 
-.. note:: Currently, the DPDK library doesn’t support API to de-initialize
- the DPDK resources allocated on the initialization. It means, the collectd
- plugin will not be able to release the allocated DPDK resources
- (locks/memory/pci bindings etc.) correctly on collectd shutdown or reinitialize
- the DPDK library if primary DPDK process is restarted. The only way to release
- those resources is to terminate the process itself. For this reason, the plugin
- forks off a separate collectd process. This child process becomes a secondary
- DPDK process which can be run on specific CPU cores configured by user through
- collectd configuration file (“Coremask” EAL configuration option, the
- hexadecimal bitmask of the cores to run on).
+The plugin uses default values (as shown) for the socket paths, if you use different values,
+uncomment and update ``ClientSocketPath`` and ``DpdkSocketPath`` as required.
 
 For more information on the plugin parameters, please see:
 https://github.com/collectd/collectd/blob/main/src/collectd.conf.pod
 
-.. note:: dpdkstat plugin initialization time depends on read interval. It
- requires 5 read cycles to set up internal buffers and states, during that time
- no statistics are submitted. Also, if plugin is running and the number of DPDK
- ports is increased, internal buffers are resized. That requires 3 read cycles
- and no port statistics are submitted during that time.
+.. note::
+
+   To gather metrics from a DPDK application, telemetry needs to be enabled.
+   This can be done by setting the ``CONFIG_RTE_LIBRTE_TELEMETRY=y`` config flag.
+   The application then needs to be run with the ``--telemetry`` EAL option, e.g.
+   ::
+     $dpdk/app/testpmd --telemetry  -l 2,3,4 -n 4  
+
+For more information on the ``dpdk_telemetry`` plugin, see the `anuket wiki <https://wiki.anuket.io/display/HOME/DPDK+Telemetry+Plugin>`_.
 
 The Address-Space Layout Randomization (ASLR) security feature in Linux should be
 disabled, in order for the same hugepage memory mappings to be present in all
@@ -270,27 +241,6 @@ To fully enable ASLR:
 For more information on multi-process support, please see:
 https://doc.dpdk.org/guides/prog_guide/multi_proc_support.html
 
-**DPDK stats plugin limitations:**
-
-1. The DPDK primary process application should use the same version of DPDK
-   that collectd DPDK plugin is using;
-
-2. L2 statistics are only supported;
-
-3. The plugin has been tested on Intel NIC’s only.
-
-**DPDK stats known issues:**
-
-* DPDK port visibility
-
-  When network port controlled by Linux is bound to DPDK driver, the port
-  will not be available in the OS. It affects the SNMP write plugin as those
-  ports will not be present in standard IF-MIB. Thus, additional work is
-  required to be done to support DPDK ports and statistics.
-
-**DPDK telemetry plugin**
-
-Please refer to https://wiki.anuket.io/display/HOME/DPDK+Telemetry+Plugin
 
 Hugepages Plugin
 ^^^^^^^^^^^^^^^^^
diff --git a/docs/release/userguide/installguide.docker.rst b/docs/release/userguide/installguide.docker.rst
index 38d467a4..a00d5ac7 100644
--- a/docs/release/userguide/installguide.docker.rst
+++ b/docs/release/userguide/installguide.docker.rst
@@ -450,8 +450,7 @@ Run the collectd stable docker image
    files should be removed from shared configuration directory
    (`<BAROMETER_REPO_DIR>/src/collectd/collectd_sample_configs/`) prior
    to starting barometer-collectd container. By example: in case of missing
-   `DPDK` functionality on the host, `dpdkstat.conf` and `dpdkevents.conf`
-   should be removed.
+   `DPDK` functionality on the host, `dpdk_telemetry.conf` should be removed.
 
    Sample configurations can be found at:
    https://github.com/opnfv/barometer/tree/master/src/collectd/collectd_sample_configs
diff --git a/docs/release/userguide/installguide.oneclick.rst b/docs/release/userguide/installguide.oneclick.rst
index d236b5b1..a1fc0821 100644
--- a/docs/release/userguide/installguide.oneclick.rst
+++ b/docs/release/userguide/installguide.oneclick.rst
@@ -330,15 +330,6 @@ the following plugins:
 
    For instructions on how to disable certain plugins see the `List and description of tags used in ansible scripts`_ section.
 
-.. note::
-   The ``dpdkstat`` and ``dpdkevents`` plugins are disabled by default (in
-   favour of the ``dpdk_telemetry`` plugin) and need to be explicitly enabled
-   in order to use them:
-
-   .. code:: bash
-
-     $ sudo ansible-playbook -i default.inv collectd_service.yml --tags "all,dpdkstats,dpdkevents"
-
 List and description of tags used in ansible scripts
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -384,5 +375,5 @@ List of available tags:
   ``turbostat``, ``uptime``, ``exec``, ``hugepages``, ``ipmi``, ``kafka``,
   ``logfile``, ``mcelog``, ``network``, ``pmu``, ``rdt``, ``rrdtool``,
   ``snmp``, ``syslog``, ``unixsock``, ``virt``, ``ovs_stats``, ``ovs_events``,
-  ``uuid``, ``dpdkevents``, ``dpdkstat``, ``dpdk_telemetry``.
+  ``uuid``, ``dpdk_telemetry``.