From 8b163b04b757c02fd1e92fddda4444a15f5ed7e0 Mon Sep 17 00:00:00 2001 From: Don Tregonning Date: Wed, 5 Dec 2018 17:33:22 -0800 Subject: [PATCH] Adding support for kubelet stats endpoint. Support for CPU, DISK_IO, MEMORY, NETWORK, FILE_SYSTEM, TASK_STATS rename cadvisor mock file, add tests Fixed cadvisor errors Added more support for stats format fixes Fixes after review by CP --- Gemfile | 2 +- lib/fluent/plugin/in_kubernetes_metrics.rb | 283 +- test/helper.rb | 22 +- ...ics_cadvisor.json => metrics_cadvisor.txt} | 0 test/stats.json | 3536 +++++++++++++++++ 5 files changed, 3794 insertions(+), 49 deletions(-) rename test/{metrics_cadvisor.json => metrics_cadvisor.txt} (100%) create mode 100644 test/stats.json diff --git a/Gemfile b/Gemfile index aaa1c55..4a24572 100644 --- a/Gemfile +++ b/Gemfile @@ -1,7 +1,7 @@ source "https://rubygems.org" group :test do - gem 'simplecov', require: false + gem 'simplecov',"~> 0.16.1", require: false end gemspec diff --git a/lib/fluent/plugin/in_kubernetes_metrics.rb b/lib/fluent/plugin/in_kubernetes_metrics.rb index 00535ff..eae14db 100644 --- a/lib/fluent/plugin/in_kubernetes_metrics.rb +++ b/lib/fluent/plugin/in_kubernetes_metrics.rb @@ -82,6 +82,7 @@ def start super timer_execute :metric_scraper, @interval, &method(:scrape_metrics) + timer_execute :stats_metric_scraper, @interval, &method(:scrape_stats_metrics) timer_execute :cadvisor_metric_scraper, @interval, &method(:scrape_cadvisor_metrics) end @@ -192,10 +193,12 @@ def initialize_rest_client if env_host && env_port @kubelet_url = "http://#{env_host}:#{env_port}/stats/summary" + @kubelet_url_stats = "http://#{env_host}:#{env_port}/stats/" @cadvisor_url = "http://#{env_host}:#{env_port}/metrics/cadvisor" end log.info("Use URL #{@kubelet_url} for creating client to query kubelet summary api") + log.info("Use URL #{@kubelet_url_stats} for creating client to query kubelet stats api") log.info("Use URL #{@cadvisor_url} for creating client to query cadvisor metrics api") end @@ -205,6 +208,18 @@ def request_options options end + # This method is used to set the options for sending a request to the stats api + def request_options_stats + options = { method: 'get', url: @kubelet_url_stats } + options + end + + # This method is used to set the options for sending a request to the cadvisor api + def cadvisor_request_options + options = { method: 'get', url: @cadvisor_url } + options + end + # @client.proxy_url only returns the url, but we need the resource, not just the url def summary_api(node) @summary_api = @@ -216,8 +231,18 @@ def summary_api(node) end end + def stats_api(node) + @stats_api = + begin + @client.discover unless @client.discovered + @client.rest_client["/nodes/#{node}:#{@kubelet_port}/proxy/stats/"].tap do |endpoint| + log.info("Use URL #{endpoint.url} for scraping stats metrics") + end + end + end + def cadvisor_proxy_api(node) - @summary_api = + @cadvisor_api = begin @client.discover unless @client.discovered @client.rest_client["/nodes/#{node}:#{@kubelet_port}/proxy/metrics/cadvisor"].tap do |endpoint| @@ -298,6 +323,145 @@ def emit_system_container_metrics(node_name, container) emit_memory_metrics tag: tag, metrics: container['memory'], labels: labels end + def emit_stats_breakdown(stats) + stats_latest = stats[-1] + tag = 'stats' + stats_timestamp = stats_latest['timestamp'] + labels = { 'stats' => 'stats' } + unless stats_latest['cpu'].nil? + emit_cpu_metrics_stats tag: tag, metrics: stats_latest['cpu'], labels: labels, time: stats_timestamp + end + + unless stats_latest['diskio'].nil? + emit_diskio_metrics_stats tag: tag, metrics: stats_latest['diskio'], labels: labels, time: stats_timestamp + end + + unless stats_latest['memory'].nil? + emit_memory_metrics_stats tag: tag, metrics: stats_latest['memory'], labels: labels, time: stats_timestamp + end + + unless stats_latest['network'].nil? + emit_network_metrics_stats tag: tag, metrics: stats_latest['network'], labels: labels, time: stats_timestamp + end + + unless stats_latest['filesystem'].nil? + emit_filesystem_metrics_stats tag: tag, metrics: stats_latest['filesystem'], labels: labels, time: stats_timestamp + end + + unless stats_latest['task_stats'].nil? + emit_tasks_stats_metrics_stats tag: tag, metrics: stats_latest['task_stats'], labels: labels, time: stats_timestamp + end + end + + def emit_cpu_metrics_stats(tag:, metrics:, labels:, time:) + if cpu_usage_total = metrics['usage']['total'] + router.emit generate_tag("#{tag}.cpu.usage.total"), time, labels.merge('value' => cpu_usage_total / 1_000_000) + end + if cpu_usage_user = metrics['usage']['user'] + router.emit generate_tag("#{tag}.cpu.usage.user"), time, labels.merge('value' => cpu_usage_user / 1_000_000) + end + if cpu_usage_system = metrics['usage']['system'] + router.emit generate_tag("#{tag}.cpu.usage.system"), time, labels.merge('value' => cpu_usage_system / 1_000_000) + end + + if cpu_cfs_periods = metrics['cfs']['periods'] + router.emit generate_tag("#{tag}.cpu.cfs.periods"), time, labels.merge('value' => cpu_cfs_periods) + end + if cpu_cfs_throttled_periods = metrics['cfs']['throttled_periods'] + router.emit generate_tag("#{tag}.cpu.cfs.throttled_periods"), time, labels.merge('value' => cpu_cfs_throttled_periods) + end + if cpu_cfs_throttled_time = metrics['cfs']['throttled_time'] + router.emit generate_tag("#{tag}.cpu.cfs.throttled_time"), time, labels.merge('value' => cpu_cfs_throttled_time) + end + if cpu_load_average = metrics['load_average'] + router.emit generate_tag("#{tag}.cpu.load_average"), time, labels.merge('value' => cpu_load_average) + end + end + + def emit_diskio_metrics_stats(tag:, metrics:, labels:, time:) + %w[io_service_bytes io_serviced].each do |metric_name| + if current_io_metric = metrics[metric_name] + current_io_metric.each do |device| + if diskio_io_service_bytes_major = device['major'] + router.emit generate_tag("#{tag}.diskio".concat(metric_name).concat("major")), time, labels.merge('device' => device['device'], 'value' => diskio_io_service_bytes_major) + end + if diskio_io_service_bytes_minor = device['minor'] + router.emit generate_tag("#{tag}.diskio".concat(metric_name).concat("minor")), time, labels.merge('device' => device['device'], 'value' => diskio_io_service_bytes_minor) + end + device_stats = device['stats'] + device_stats.each do | device_stat | + device_key, device_value = device_stat + router.emit generate_tag("#{tag}.diskio.".concat(metric_name).concat(".stats.").concat(device_key)), time, labels.merge('device' => device['device'], 'value' => device_value) + end + end + end + end + end + + def emit_memory_metrics_stats(tag:, metrics:, labels:, time:) + %w[usage max_usage cache rss swap working_set failcnt].each do | metric_name | + if current_memory_metric = metrics[metric_name] + router.emit generate_tag("#{tag}.memory.".concat(metric_name)), time, labels.merge('value' => current_memory_metric) + end + + end + %w[container_data hierarchical_data ].each do | metric_name_group | + if current_memory_metric_group = metrics[metric_name_group] + current_memory_metric_group.each do | metric_name | + metric_key, metric_value = metric_name + router.emit generate_tag("#{tag}.memory.".concat(metric_name_group).concat(".").concat(metric_key)), time, labels.merge('value' => metric_value) + end + end + end + end + + def emit_network_metrics_stats(tag:, metrics:, labels:, time:) + network_name = metrics['name'] + %w[rx_bytes rx_packets rx_errors rx_dropped tx_bytes tx_packets tx_errors tx_dropped].each do | metric_name | + if current_network_metric = metrics[metric_name] + router.emit generate_tag("#{tag}.network.".concat(network_name).concat(".").concat(metric_name)), time, labels.merge('value' => current_network_metric) + end + end + + if network_interfaces = metrics['interfaces'] + network_interfaces.each do | current_interface | + name = current_interface['name'] + %w[rx_bytes rx_packets rx_errors rx_dropped tx_bytes tx_packets tx_errors tx_dropped].each do | current_metric| + if metric_value = current_interface[current_metric] + router.emit generate_tag("#{tag}.network.".concat(name).concat(".").concat(current_metric)), time, labels.merge('value' => metric_value) + end + end + end + end + + %w[tcp tcp6 udp udp6].each do | metric_name_group | + if metric_group = metrics[metric_name_group] + metric_group.each do |current_metric| + metric_key, metric_value = current_metric + router.emit generate_tag("#{tag}.network.".concat(metric_name_group).concat(".").concat(metric_key)), time, labels.merge('value' => metric_value) + end + end + end + end + + def emit_filesystem_metrics_stats(tag:, metrics:, labels:, time:) + metrics.each do | file_system | + device = file_system['device'] + type = file_system['type'] + file_system.each do | file_metric | + file_key , file_value = file_metric + router.emit generate_tag("#{tag}.filesystem.".concat(".").concat(file_key)), time, labels.merge('device' => device, 'type' => type, 'value' => file_value) + end + end + end + + def emit_tasks_stats_metrics_stats(tag:, metrics:, labels:, time:) + metrics.each do | task_stats | + task_key, task_value = task_stats + router.emit generate_tag("#{tag}.tasks_stats.".concat(task_key)), time, labels.merge('value' => task_value) + end + end + def emit_node_metrics(node) node_name = node['nodeName'] tag = 'node' @@ -328,7 +492,7 @@ def emit_node_metrics(node) node['systemContainers'].each do |c| emit_system_container_metrics node_name, c end - end + end end def emit_container_metrics(pod_labels, container) @@ -364,35 +528,8 @@ def emit_metrics(metrics) Array(metrics['pods']).each &method(:emit_pod_metrics).curry.call(metrics['node']['nodeName']) unless metrics['pods'].nil? end - def scrape_metrics - if @use_rest_client - response = RestClient::Request.execute request_options - handle_response(response) - else - @node_names.each do |node| - response = summary_api(node).get(@client.headers) - handle_response(response) - end - end - end - - # This method is used to handle responses from the kubelet summary api - def handle_response(response) - # Checking response codes only for a successful GET request viz., 2XX codes - if (response.code < 300) && (response.code > 199) - @scraped_at = Time.now - emit_metrics MultiJson.load(response.body) - else - log.error "ExMultiJson.load(response.body) expected 2xx from summary API, but got #{response.code}. Response body = #{response.body}" - end - rescue StandardError => error - log.error "Failed to scrape metrics, error=#{error.inspect}" - log.error_backtrace - end - - def cadvisor_request_options - options = { method: 'get', url: @cadvisor_url } - options + def emit_stats_metrics(metrics) + emit_stats_breakdown(metrics['stats']) unless metrics['stats'].nil? end def emit_cadvisor_metrics(metrics) @@ -410,34 +547,88 @@ def emit_cadvisor_metrics(metrics) namespace = metric.match(/namespace="\S*"/).to_s namespace = namespace.split('"')[1] metric_labels = {'pod_name' => pod_name, 'image' => image_name, 'namespace' => namespace, 'value' => metric_val} - if metric.match(/^((?!container_name="POD").)*$/) - tag = 'pod' - tag = generate_tag("#{tag}#{metric_name.gsub('_', '.')}") - tag = tag.gsub('container', '') - else - container_name = metric.match(/container_name="\S*"/).to_s - container_name = container_name.split('"')[1] - container_label = {'container_name' => container_name} - metric_labels.merge(container_label) - tag = generate_tag("#{metric_name.gsub('_', '.')}") - end + if metric.match(/^((?!container_name="POD").)*$/) + tag = 'pod' + tag = generate_tag("#{tag}#{metric_name.gsub('_', '.')}") + tag = tag.gsub('container', '') + else + container_name = metric.match(/container_name="\S*"/).to_s + container_name = container_name.split('"')[1] + container_label = {'container_name' => container_name} + metric_labels.merge(container_label) + tag = generate_tag("#{metric_name.gsub('_', '.')}") + end router.emit tag, @scraped_at_cadvisor, metric_labels end end end end + def scrape_metrics + if @use_rest_client + response = RestClient::Request.execute request_options + handle_response(response) + else + @node_names.each do |node| + response = summary_api(node).get(@client.headers) + handle_response(response) + end + end + end + + def scrape_stats_metrics + if @use_rest_client + response_stats = RestClient::Request.execute request_options_stats + handle_stats_response(response_stats) + else + @node_names.each do |node| + response_stats = stats_api(node).get(@client.headers) + handle_stats_response(response_stats) + end + end + end + def scrape_cadvisor_metrics if @use_rest_client - response = RestClient::Request.execute cadvisor_request_options - handle_cadvisor_response(response) + response_cadvisor = RestClient::Request.execute cadvisor_request_options + handle_cadvisor_response(response_cadvisor) else - response = cadvisor_proxy_api(@node_name).get(@client.headers) - handle_cadvisor_response(response) + @node_names.each do |node| + response_cadvisor = cadvisor_proxy_api(node).get(@client.headers) + handle_cadvisor_response(response_cadvisor) + end end end # This method is used to handle responses from the kubelet summary api + def handle_response(response) + # Checking response codes only for a successful GET request viz., 2XX codes + if (response.code < 300) && (response.code > 199) + @scraped_at = Time.now + emit_metrics MultiJson.load(response.body) + else + log.error "ExMultiJson.load(response.body) expected 2xx from summary API, but got #{response.code}. Response body = #{response.body}" + end + rescue StandardError => error + log.error "Failed to scrape metrics, error=#{error.inspect}" + log.error_backtrace + end + + # This method is used to handle responses from the kubelet stats api + def handle_stats_response(response) + # Checking response codes only for a successful GET request viz., 2XX codes + if (response.code < 300) && (response.code > 199) + @scraped_at = Time.now + emit_stats_metrics MultiJson.load(response.body) + else + log.error "ExMultiJson.load(response.body) expected 2xx from stats API, but got #{response.code}. Response body = #{response.body}" + end + rescue StandardError => error + log.error "Failed to scrape metrics, error=#{error.inspect}" + log.error_backtrace + end + + # This method is used to handle responses from the cadvisor api def handle_cadvisor_response(response) # Checking response codes only for a successful GET request viz., 2XX codes if (response.code < 300) && (response.code > 199) diff --git a/test/helper.rb b/test/helper.rb index f0e5046..3c3bf09 100644 --- a/test/helper.rb +++ b/test/helper.rb @@ -22,7 +22,8 @@ def k8s_host() "generics-aws-node-name" end def k8s_port() "10255" end def k8s_url(path='api') "https://#{k8s_host}:#{k8s_port}/#{path}" end def kubelet_summary_api_url() "http://generics-aws-node-name:10255/stats/summary" end - def kubelet_cadvisor_api_url() "http://generics-aws-node-name:10255/cadvisor/metrics" end + def kubelet_stats_api_url() "http://generics-aws-node-name:10255/stats/" end + def kubelet_cadvisor_api_url() "http://generics-aws-node-name:10255/metrics/cadvisor" end def stub_k8s_requests ENV['KUBERNETES_SERVICE_HOST'] = k8s_host @@ -32,6 +33,9 @@ def stub_k8s_requests stub_k8s_v1 stub_kubelet_summary_api stub_k8s_proxy_summary_api + stub_metrics_cadvisor + stub_metrics_stats + stub_k8s_proxy_cadvisor_api end def stub_k8s_proxy_summary_api @@ -63,12 +67,26 @@ def stub_kubelet_summary_api end def stub_metrics_cadvisor - open(File.expand_path('../metrics_cadvisor.json', __FILE__)).tap { |f| + open(File.expand_path('../metrics_cadvisor.txt', __FILE__)).tap { |f| stub_request(:get, "#{kubelet_cadvisor_api_url}") .to_return(body: f.read()) }.close end + def stub_k8s_proxy_cadvisor_api + open(File.expand_path('../metrics_cadvisor.txt', __FILE__)).tap { |f| + stub_request(:get, "#{k8s_url}/v1/nodes/generics-aws-node-name:10255/proxy/metrics/cadvisor") + .to_return(body: f.read) + }.close +end + + def stub_metrics_stats + open(File.expand_path('../stats.json', __FILE__)).tap { |f| + stub_request(:get, "#{kubelet_stats_api_url}") + .to_return(body: f.read()) + }.close + end + def get_parsed_string parsed_string = nil open(File.expand_path('../unit.json', __FILE__)).tap { |f| diff --git a/test/metrics_cadvisor.json b/test/metrics_cadvisor.txt similarity index 100% rename from test/metrics_cadvisor.json rename to test/metrics_cadvisor.txt diff --git a/test/stats.json b/test/stats.json new file mode 100644 index 0000000..5db5262 --- /dev/null +++ b/test/stats.json @@ -0,0 +1,3536 @@ +{ + "name": "/", + "subcontainers": [ + { + "name": "/docker" + }, + { + "name": "/kubepods" + } + ], + "spec": { + "creation_time": "2018-11-02T20:08:45.240430737Z", + "has_cpu": true, + "cpu": { + "limit": 1024, + "max_limit": 0, + "mask": "0-1", + "period": 100000 + }, + "has_memory": true, + "memory": { + "limit": 3949842432, + "reservation": 9223372036854771712 + }, + "has_network": true, + "has_filesystem": true, + "has_diskio": true, + "has_custom_metrics": false + }, + "stats": [ + { + "timestamp": "2018-12-03T19:05:28.007228616Z", + "cpu": { + "usage": { + "total": 359032793752122, + "user": 105968050000000, + "system": 31237370000000 + }, + "cfs": { + "periods": 0, + "throttled_periods": 0, + "throttled_time": 0 + }, + "load_average": 0 + }, + "diskio": { + "io_service_bytes": [ + { + "device": "/dev/xvdv", + "major": 202, + "minor": 5376, + "stats": { + "Async": 4812648448, + "Read": 1916928, + "Sync": 66095685632, + "Total": 70908334080, + "Write": 70906417152 + } + }, + { + "device": "/dev/xvdu", + "major": 202, + "minor": 5120, + "stats": { + "Async": 18098519040, + "Read": 2198528, + "Sync": 110460579840, + "Total": 128559098880, + "Write": 128556900352 + } + }, + { + "device": "/dev/xvda", + "major": 202, + "minor": 0, + "stats": { + "Async": 72181924864, + "Read": 1012605952, + "Sync": 73938558976, + "Total": 146120483840, + "Write": 145107877888 + } + } + ], + "io_serviced": [ + { + "device": "/dev/xvda", + "major": 202, + "minor": 0, + "stats": { + "Async": 5036327, + "Read": 27810, + "Sync": 8663754, + "Total": 13700081, + "Write": 13672271 + } + }, + { + "device": "/dev/xvdv", + "major": 202, + "minor": 5376, + "stats": { + "Async": 62614, + "Read": 201, + "Sync": 16136642, + "Total": 16199256, + "Write": 16199055 + } + }, + { + "device": "/dev/xvdu", + "major": 202, + "minor": 5120, + "stats": { + "Async": 91073, + "Read": 247, + "Sync": 26967915, + "Total": 27058988, + "Write": 27058741 + } + } + ] + }, + "memory": { + "usage": 3636805632, + "max_usage": 1585664000, + "cache": 2067836928, + "rss": 976539648, + "swap": 0, + "working_set": 2529902592, + "failcnt": 0, + "container_data": { + "pgfault": 1026844047, + "pgmajfault": 6510 + }, + "hierarchical_data": { + "pgfault": 1026844047, + "pgmajfault": 6510 + } + }, + "network": { + "name": "eth0", + "rx_bytes": 7537660604, + "rx_packets": 43144744, + "rx_errors": 0, + "rx_dropped": 0, + "tx_bytes": 26323482944, + "tx_packets": 50039436, + "tx_errors": 0, + "tx_dropped": 0, + "interfaces": [ + { + "name": "eth0", + "rx_bytes": 7537660604, + "rx_packets": 43144744, + "rx_errors": 0, + "rx_dropped": 0, + "tx_bytes": 26323482944, + "tx_packets": 50039436, + "tx_errors": 0, + "tx_dropped": 0 + } + ], + "tcp": { + "Established": 0, + "SynSent": 0, + "SynRecv": 0, + "FinWait1": 0, + "FinWait2": 0, + "TimeWait": 0, + "Close": 0, + "CloseWait": 0, + "LastAck": 0, + "Listen": 0, + "Closing": 0 + }, + "tcp6": { + "Established": 0, + "SynSent": 0, + "SynRecv": 0, + "FinWait1": 0, + "FinWait2": 0, + "TimeWait": 0, + "Close": 0, + "CloseWait": 0, + "LastAck": 0, + "Listen": 0, + "Closing": 0 + }, + "udp": { + "Listen": 0, + "Dropped": 0, + "RxQueued": 0, + "TxQueued": 0 + }, + "udp6": { + "Listen": 0, + "Dropped": 0, + "RxQueued": 0, + "TxQueued": 0 + } + }, + "filesystem": [ + { + "device": "/dev/xvdv", + "type": "vfs", + "capacity": 21003628544, + "usage": 375873536, + "base_usage": 0, + "available": 19537235968, + "has_inodes": true, + "inodes": 1310720, + "inodes_free": 1310690, + "reads_completed": 426, + "reads_merged": 0, + "sectors_read": 7064, + "read_time": 84, + "writes_completed": 16133836, + "writes_merged": 5446479, + "sectors_written": 175930600, + "write_time": 925920, + "io_in_progress": 0, + "io_time": 786612, + "weighted_io_time": 925940 + }, + { + "device": "tmpfs", + "type": "vfs", + "capacity": 789970944, + "usage": 917504, + "base_usage": 0, + "available": 789053440, + "has_inodes": true, + "inodes": 482158, + "inodes_free": 481532, + "reads_completed": 0, + "reads_merged": 0, + "sectors_read": 0, + "read_time": 0, + "writes_completed": 0, + "writes_merged": 0, + "sectors_written": 0, + "write_time": 0, + "io_in_progress": 0, + "io_time": 0, + "weighted_io_time": 0 + }, + { + "device": "/dev/xvda1", + "type": "vfs", + "capacity": 64345141248, + "usage": 5029154816, + "base_usage": 0, + "available": 56464998400, + "has_inodes": true, + "inodes": 16777216, + "inodes_free": 16699841, + "reads_completed": 31892, + 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