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michelsciortinomichelsciortino
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Dynmon implementation
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‎src/services/CMakeLists.txt

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@@ -36,6 +36,7 @@ add_service(iptables pcn-iptables)
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add_service(transparenthelloworld pcn-transparent-helloworld)
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add_service(synflood pcn-synflood)
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add_service(packetcapture pcn-packetcapture)
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add_service(dynmon pcn-dynmon)
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# save string to create code that load the services
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SET_PROPERTY(GLOBAL PROPERTY LOAD_SERVICES_ ${LOAD_SERVICES})

‎src/services/pcn-dynmon/.swagger-codegen-ignore

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# Swagger Codegen Ignore
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# Generated by swagger-codegen https://github.com/swagger-api/swagger-codegen
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# Use this file to prevent files from being overwritten by the generator.
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.swagger-codegen-ignore
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src/*.cpp
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src/*.h
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!src/*Interface.h
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!src/*JsonObject.h
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!src/*JsonObject.cpp

‎src/services/pcn-dynmon/CMakeLists.txt

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cmake_minimum_required (VERSION 3.2)
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set (CMAKE_CXX_STANDARD 11)
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add_subdirectory(src)

‎src/services/pcn-dynmon/cmake/LoadFileAsVariable.cmake

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# Loads the contents of a file into a std::string variable
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#
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# It creates a header file in ${CMAKE_CURRENT_BINARY_DIR}/${file}.h
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# that wrapps the contents of the file in a std::string using the raw
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# string literal feature of C++11. The user needs to include that file
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# into the source code in order to see the variable.
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#
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# parameters:
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# target: target to add a dependency on file
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# file: file to be loaded
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# variable_name: name variable where the file is loaded
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#
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# example:
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# load_file_as_variable(my-lib resource.c my_resource)
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# Creates a resource.h in CMAKE_CURRENT_BINARY_DIR with a string variable
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# my_resource with the contents of resource.c
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# A dependency in resource.c is added to my-lib
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function(load_file_as_variable target file variable_name)
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get_filename_component(file_name ${file} NAME_WE)
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get_filename_component(file_dir ${file} DIRECTORY)
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set(new_path ${file_dir}/${file_name}.h)
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add_custom_command(
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OUTPUT
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${CMAKE_CURRENT_BINARY_DIR}/${new_path}
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COMMAND
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mkdir -p ${CMAKE_CURRENT_BINARY_DIR}/${file_dir}
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COMMAND
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echo "#pragma once" > ${CMAKE_CURRENT_BINARY_DIR}/${new_path}
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COMMAND
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echo "#include <string>" >> ${CMAKE_CURRENT_BINARY_DIR}/${new_path}
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COMMAND
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echo "const std::string ${variable_name} = R\"POLYCUBE_DP(" >> ${CMAKE_CURRENT_BINARY_DIR}/${new_path}
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COMMAND
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cat ${CMAKE_CURRENT_SOURCE_DIR}/${file} >> ${CMAKE_CURRENT_BINARY_DIR}/${new_path}
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COMMAND
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cmake -E echo ")POLYCUBE_DP\";" >> ${CMAKE_CURRENT_BINARY_DIR}/${new_path}
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DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${file}
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VERBATIM
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)
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string(REPLACE "/" "-" path_replaced ${new_path})
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add_custom_target(
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generate_${path_replaced}
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DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${new_path}
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)
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add_dependencies(${target} generate_${path_replaced})
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endfunction()

‎src/services/pcn-dynmon/datamodel/dynmon.yang

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module dynmon {
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yang-version 1.1;
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namespace "http://polycube.network/dynmon";
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prefix "dynmon";
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import polycube-base {
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prefix "polycube-base";
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}
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import polycube-transparent-base {
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prefix "polycube-transparent-base";
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}
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import "ietf-inet-types" {
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prefix "inet";
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}
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import "ietf-yang-types" {
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prefix "yang";
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}
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organization
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"Polycube open source project";
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description
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"YANG data model for the Polycube Dynamic Traffic Monitor transparent service";
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polycube-base:service-description "Dynamic Traffic Monitor transparent service";
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polycube-base:service-version "1.0";
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polycube-base:service-name "dynmon";
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polycube-base:service-min-kernel-version "4.14.0";
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uses polycube-transparent-base:transparent-base-yang-module;
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container dataplane {
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description
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"Running dataplane";
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leaf name {
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type string;
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description
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"eBPF program name";
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polycube-base:init-only-config;
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}
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leaf code {
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type string;
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description
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"eBPF source code";
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polycube-base:init-only-config;
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}
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list metrics {
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key "name";
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description
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"Exported Metric";
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polycube-base:init-only-config;
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leaf name {
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type string;
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description
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"Name of the metric (e.g., number of HTTP requests)";
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polycube-base:init-only-config;
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}
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leaf map-name {
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type string;
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description
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"Corrisponding eBPF map name";
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polycube-base:init-only-config;
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}
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container open-metrics-metadata {
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presence
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"The metric will be exported with the OpenMetric format";
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description
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"Open-Metrics metadata";
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polycube-base:init-only-config;
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leaf help {
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type string;
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description
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"Metric description";
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polycube-base:init-only-config;
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}
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leaf type {
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type enumeration{
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enum Counter;
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enum Gauge;
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enum Histogram;
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enum Summary;
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enum Untyped;
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}
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description
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"Metric type";
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polycube-base:init-only-config;
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}
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list labels {
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key "name";
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description
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"Label attached to the metric";
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polycube-base:init-only-config;
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leaf name {
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type string;
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description
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"Name of the label (e.g., 'method')";
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polycube-base:init-only-config;
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}
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leaf value {
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type string;
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description
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"Label value (e.g., 'POST')";
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polycube-base:init-only-config;
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}
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}
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}
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}
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}
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list metrics {
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config false;
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key "name";
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description
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"Collected metrics";
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leaf name {
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config false;
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type string;
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description
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"Name of the metric (e.g, number of HTTP requests)";
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}
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leaf value {
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config false;
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type string;
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description
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"Value of the metric";
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}
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leaf timestamp {
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config false;
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type int64;
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description
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"Timestamp";
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}
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}
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leaf open-metrics {
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config false;
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type string;
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description
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"Collected metrics in OpenMetrics Format";
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}
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}

‎src/services/pcn-dynmon/src/CMakeLists.txt

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include(${PROJECT_SOURCE_DIR}/cmake/LoadFileAsVariable.cmake)
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aux_source_directory(serializer SERIALIZER_SOURCES)
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aux_source_directory(api API_SOURCES)
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aux_source_directory(base BASE_SOURCES)
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include_directories(serializer)
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if (NOT DEFINED POLYCUBE_STANDALONE_SERVICE OR POLYCUBE_STANDALONE_SERVICE)
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find_package(PkgConfig REQUIRED)
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pkg_check_modules(POLYCUBE libpolycube)
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include_directories(${POLYCUBE_INCLUDE_DIRS})
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endif(NOT DEFINED POLYCUBE_STANDALONE_SERVICE OR POLYCUBE_STANDALONE_SERVICE)
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# Needed to load files as variables
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include_directories(${CMAKE_CURRENT_BINARY_DIR})
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add_library(pcn-dynmon SHARED
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${SERIALIZER_SOURCES}
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${API_SOURCES}
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${BASE_SOURCES}
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Dataplane.cpp
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DataplaneMetrics.cpp
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DataplaneMetricsOpenMetricsMetadata.cpp
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DataplaneMetricsOpenMetricsMetadataLabels.cpp
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Dynmon.cpp
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Metrics.cpp
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MapExtractor.cpp
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Dynmon-lib.cpp)
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# load ebpf datapath code a variable
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load_file_as_variable(pcn-dynmon
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Dynmon_dp.c
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dynmon_code)
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# load datamodel in a variable
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load_file_as_variable(pcn-dynmon
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../datamodel/dynmon.yang
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dynmon_datamodel)
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target_link_libraries(pcn-dynmon ${POLYCUBE_LIBRARIES})
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# Specify shared library install directory
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set(CMAKE_INSTALL_LIBDIR /usr/lib)
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install(
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TARGETS
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pcn-dynmon
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DESTINATION
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"${CMAKE_INSTALL_LIBDIR}"
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)

‎src/services/pcn-dynmon/src/Dataplane.cpp

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#include "Dataplane.h"
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#include "Dynmon.h"
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Dataplane::Dataplane(Dynmon &parent, const DataplaneJsonObject &conf)
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: DataplaneBase(parent) {
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// Setting the dataplane name
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if (conf.nameIsSet())
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name_ = conf.getName();
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else
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name_ = DEFAULT_NAME;
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// Setting the dataplane code
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if (conf.codeIsSet())
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code_ = conf.getCode();
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else
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code_ = DEFAULT_CODE;
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// Setting the dataplane metrics configuration
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addMetricsList(conf.getMetrics());
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}
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Dataplane::~Dataplane() {}
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std::string Dataplane::getName() {
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return name_;
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}
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std::string Dataplane::getCode() {
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return code_;
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}
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std::shared_ptr<DataplaneMetrics> Dataplane::getMetrics(const std::string &name) {
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for (auto &it : metrics_)
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if (it->getName() == name)
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return it;
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throw std::runtime_error("The metric does not exist");
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}
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std::vector<std::shared_ptr<DataplaneMetrics>> Dataplane::getMetricsList() {
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return metrics_;
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}
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void Dataplane::addMetrics(const std::string &name, const DataplaneMetricsJsonObject &conf) {
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auto entry = std::make_shared<DataplaneMetrics>(*this, conf);
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if (entry == nullptr)
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throw std::runtime_error("This should not happen");
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for (auto &it : metrics_)
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if (it->getName() == entry->getName())
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throw std::runtime_error("Cannot insert duplicate metrics entry");
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metrics_.push_back(entry);
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}
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void Dataplane::addMetricsList(const std::vector<DataplaneMetricsJsonObject> &conf) {
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DataplaneBase::addMetricsList(conf);
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}
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void Dataplane::replaceMetrics(const std::string &name, const DataplaneMetricsJsonObject &conf) {
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DataplaneBase::replaceMetrics(name, conf);
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}
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void Dataplane::delMetrics(const std::string &name) {
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metrics_.erase(
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std::remove_if(metrics_.begin(), metrics_.end(),
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[name](const std::shared_ptr<DataplaneMetrics> &entry) {
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return entry->getName() == name;
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}),
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metrics_.end());
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}
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void Dataplane::delMetricsList() {
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metrics_.clear();
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}

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