From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by dpdk.org (Postfix) with ESMTP id D4DB51B17E for ; Tue, 16 Oct 2018 17:58:12 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Oct 2018 08:58:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,389,1534834800"; d="scan'208";a="92465452" Received: from silpixa00397517.ir.intel.com (HELO silpixa00397517.ger.corp.intel.com) ([10.237.222.54]) by orsmga003.jf.intel.com with ESMTP; 16 Oct 2018 08:58:09 -0700 From: Kevin Laatz To: dev@dpdk.org Cc: harry.van.haaren@intel.com, stephen@networkplumber.org, gaetan.rivet@6wind.com, shreyansh.jain@nxp.com, thomas@monjalon.net, mattias.ronnblom@ericsson.com, bruce.richardson@intel.com, Ciara Power , Brian Archbold , Kevin Laatz Date: Tue, 16 Oct 2018 16:58:00 +0100 Message-Id: <20181016155802.2067-12-kevin.laatz@intel.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20181016155802.2067-1-kevin.laatz@intel.com> References: <20181011165837.81030-1-kevin.laatz@intel.com> <20181016155802.2067-1-kevin.laatz@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v5 11/13] doc: add telemetry documentation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Oct 2018 15:58:13 -0000 From: Ciara Power This patch adds all documentation for telemetry. A description on how to use the Telemetry API with a DPDK application is given in this document. It also adds the MAINTAINERS file entry for telemetry. Signed-off-by: Ciara Power Signed-off-by: Brian Archbold Signed-off-by: Kevin Laatz Acked-by: Harry van Haaren --- MAINTAINERS | 5 +++ doc/guides/howto/index.rst | 1 + doc/guides/howto/telemetry.rst | 85 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 91 insertions(+) create mode 100644 doc/guides/howto/telemetry.rst diff --git a/MAINTAINERS b/MAINTAINERS index 84b9ff7..e695a68 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1168,6 +1168,11 @@ F: test/bpf/ F: test/test/test_bpf.c F: doc/guides/prog_guide/bpf_lib.rst +Telemetry +M: Kevin Laatz +F: lib/librte_telemetry/ +F: usertools/dpdk-telemetry-client.py +F: doc/guides/howto/telemetry.rst Test Applications ----------------- diff --git a/doc/guides/howto/index.rst b/doc/guides/howto/index.rst index e13a090..a642a2b 100644 --- a/doc/guides/howto/index.rst +++ b/doc/guides/howto/index.rst @@ -17,3 +17,4 @@ HowTo Guides virtio_user_for_container_networking virtio_user_as_exceptional_path packet_capture_framework + telemetry diff --git a/doc/guides/howto/telemetry.rst b/doc/guides/howto/telemetry.rst new file mode 100644 index 0000000..3fcb061 --- /dev/null +++ b/doc/guides/howto/telemetry.rst @@ -0,0 +1,85 @@ +.. SPDX-License-Identifier: BSD-3-Clause + Copyright(c) 2018 Intel Corporation. + +DPDK Telemetry API User Guide +============================== + +This document describes how the Data Plane Development Kit(DPDK) Telemetry API +is used for querying port statistics from incoming traffic. + +Introduction +------------ + +The ``librte_telemetry`` provides the functionality so that users may query +metrics from incoming port traffic. The application which initializes packet +forwarding will act as the server, sending metrics to the requesting application +which acts as the client. + +In DPDK, applications are used to initialize the ``telemetry``. To view incoming +traffic on featured ports, the application should be run first (ie. after ports +are configured). Once the application is running, the service assurance agent +(for example the collectd plugin) should be run to begin querying the API. + +A client connects their Service Assurance application to the DPDK application +via a UNIX socket. Once a connection is established, a client can send JSON +messages to the DPDK application requesting metrics via another UNIX client. +This request is then handled and parsed if valid. The response is then +formatted in JSON and sent back to the requesting client. + +Pre-requisites +~~~~~~~~~~~~~~ + +* Python ≥ 2.5 + +* Jansson library for JSON serialization + +Test Environment +---------------- + +``telemetry`` offers a range of selftests that a client can run within +the DPDK application. + +Selftests are disabled by default. They can be enabled by setting the 'selftest' +variable to 1 in rte_telemetry_initial_accept(). + +Note: this 'hardcoded' value is temporary. + +Configuration +------------- + +Enable the telemetry API by modifying the following config option before +building DPDK:: + + CONFIG_RTE_LIBRTE_TELEMETRY=y + +Note: Meson will pick this up automatically if ``libjansson`` is available. + +Running the Application +----------------------- + +The following steps demonstrate how to run the ``telemetry`` API to query all +statistics on all active ports, using the ``telemetry_client`` python script +to query. +Note: This guide assumes packet generation is applicable and the user is +testing with testpmd as a DPDK primary application to forward packets, although +any DPDK application is applicable. + +#. Launch testpmd as the primary application with ``telemetry``.:: + + ./app/testpmd --telemetry + +#. Launch the ``telemetry`` python script with a client filepath.:: + + python usertools/telemetry_client.py /var/run/some_client + + The client filepath is going to be used to setup our UNIX connection with the + DPDK primary application, in this case ``testpmd`` + This will initialize a menu where a client can proceed to recursively query + statistics, request statistics once or unregister the file_path, thus exiting + the menu. + +#. Send traffic to any or all available ports from a traffic generator. + Select a query option(recursive or singular polling). + The metrics will then be displayed on the client terminal in JSON format. + +#. Once finished, unregister the client using the menu command. -- 2.9.5