prom: basic builtin prometheus stats exporter - vpp

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author	Florin Coras <fcoras@cisco.com>	2022-01-31 16:16:13 -0800
committer	Florin Coras <fcoras@cisco.com>	2022-02-02 17:04:46 -0800
commit	7285be2aabf4ba9915a23085e63efb896c5a8896 (patch)
tree	316597182679f013c76619e725aa5031263a039d /src/plugins/ioam/encap/ip6_ioam_seqno.h
parent	c556fa49b462c6ebc206c9a5b3f6ff951d31f56a (diff)

prom: basic builtin prometheus stats exporter

This is a vpp builtin alternative, not a replacement, for the existing vpp_prometheus_exporter. The plugin works by registering with http_static as a url handler for stats.prom and handles requests by scraping the stats segment in the main thread. It will therefore consume vpp process cpu cycles. By default the plugin is disabled. To enable, first start the http static server an then use "prom enable" cli. Type: feature Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: If6888e965d1b2361f6a5546586068213d37079d1

Diffstat (limited to 'src/plugins/ioam/encap/ip6_ioam_seqno.h')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2017 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <linux/vfio.h> #include <sys/ioctl.h> #include <vnet/vnet.h> #include <vnet/plugin/plugin.h> #include <dpdk/device/dpdk.h> #include <vpp/app/version.h> /* * Called by the dpdk driver's rte_delay_us() function. * Return 0 to have the dpdk do a regular delay loop. * Return 1 if to skip the delay loop because we are suspending * the calling vlib process instead. */ static int rte_delay_us_override (unsigned us) { vlib_main_t *vm; /* Don't bother intercepting for short delays */ if (us < 10) return 0; /* * Only intercept if we are in a vlib process. * If we are called from a vlib worker thread or the vlib main * thread then do not intercept. (Must not be called from an * independent pthread). */ if (vlib_get_thread_index () == 0) { /* * We're in the vlib main thread or a vlib process. Make sure * the process is running and we're not still initializing. */ vm = vlib_get_main (); if (vlib_in_process_context (vm)) { /* Only suspend for the admin_down_process */ vlib_process_t *proc = vlib_get_current_process (vm); if (!(proc->flags & VLIB_PROCESS_IS_RUNNING) || (proc->node_runtime.node_index != admin_up_down_process_node.index)) return 0; f64 delay = 1e-6 * us; vlib_process_suspend (vm, delay); return 1; } } return 0; // no override } static void rte_delay_us_override_cb (unsigned us) { if (rte_delay_us_override (us) == 0) rte_delay_us_block (us); } static clib_error_t * dpdk_main_init (vlib_main_t * vm) { clib_error_t * error = 0; /* register custom delay function */ rte_delay_us_callback_register (rte_delay_us_override_cb); return error; } /* *INDENT-OFF* */ VLIB_INIT_FUNCTION (dpdk_main_init) = { .runs_after = VLIB_INITS("dpdk_init"), }; VLIB_PLUGIN_REGISTER () = { .version = VPP_BUILD_VER, .description = "Data Plane Development Kit (DPDK)", }; /* *INDENT-ON* */


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