Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Monitoring Containerized Elixir
Search
さっちゃん
September 07, 2019
Programming
1
990
Monitoring Containerized Elixir
#ElixirConfJP #CastleConf
さっちゃん
September 07, 2019
Tweet
Share
More Decks by さっちゃん
See All by さっちゃん
みんなのオブザーバビリティプラットフォームを作ってるんだがパフォーマンスがやばい #mackerelio #srenext
ne_sachirou
0
1.5k
作ってよかったgraceful shutdownライブラリ #kyotogo
ne_sachirou
0
1.3k
path 依存型って何?
ne_sachirou
0
660
野生の onbording と onbording 設計 #kyototechtalk
ne_sachirou
0
630
メトリックはいかにして見え續ける樣になったか #devio2022
ne_sachirou
0
93
名實一致
ne_sachirou
0
670
まかれるあなとみあ ―Mackerel のしくみを理解する 30 分― @ Hatena Engineer Seminar #16
ne_sachirou
0
3.1k
tacit programming : Point-free, Concatenatives & J
ne_sachirou
0
990
Let's create stateful systems, by Elixir
ne_sachirou
1
950
Other Decks in Programming
See All in Programming
Claude Code で Astro blog を Pages から Workers へ移行してみた
codehex
0
150
はじめてのWeb API体験 ー 飲食店検索アプリを作ろうー
akinko_0915
0
160
AIともっと楽するE2Eテスト
myohei
9
3.1k
テスト駆動Kaggle
isax1015
1
880
「次に何を学べばいいか分からない」あなたへ──若手エンジニアのための学習地図
panda_program
3
640
新メンバーも今日から大活躍!SREが支えるスケールし続ける組織のオンボーディング
honmarkhunt
5
9.3k
AWS Summit Japan 2024と2025の比較/はじめてのKiro、今あなたは岐路に立つ
satoshi256kbyte
1
240
Workers を定期実行する方法は一つじゃない
rokuosan
0
130
リッチエディターを安全に開発・運用するために
unachang113
1
240
slogパッケージの深掘り
integral0515
0
120
マッチングアプリにおけるフリックUIで苦労したこと
yuheiito
0
240
React は次の10年を生き残れるか:3つのトレンドから考える
oukayuka
40
14k
Featured
See All Featured
We Have a Design System, Now What?
morganepeng
53
7.7k
Unsuck your backbone
ammeep
671
58k
Optimizing for Happiness
mojombo
379
70k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
3.1k
Java REST API Framework Comparison - PWX 2021
mraible
31
8.7k
What's in a price? How to price your products and services
michaelherold
246
12k
Fantastic passwords and where to find them - at NoRuKo
philnash
51
3.3k
How GitHub (no longer) Works
holman
314
140k
Gamification - CAS2011
davidbonilla
81
5.4k
Designing for Performance
lara
610
69k
How STYLIGHT went responsive
nonsquared
100
5.6k
Being A Developer After 40
akosma
90
590k
Transcript
Monitoring Containerized Elixir
.。oO(さっちゃんですよヾ(〃l _ l)ノ゙☆) @ Mackerel.io / Hatena.ne.jp
Imagine, you have a great Elixir app.
Imagine, you have a great Elixir app. And will be
working it on Docker
Imagine, you have a great Elixir app. And will be
working it on Docker on Kubernetes.
Why container, Docker? Container is an abstract layer over infrastructure.
It runs everywhere. It easy to create, share, transfer & run.
Why Kubernetes? K8s is a common language. K8s can run
every types of applications.
Elixir on Containers https://speakerdeck.com/ne_sachirou/elixir-on- containers s/:distillery/Mix.Release/
When you've deployed the app on K8s. How to monitor
it?
Why Monitoring? Is your app works well? Know how your
app works. What caused when your app is broken. Keep your app observable.
Liveness check Is your app is living or not?
K8s has liveness probe. --- apiVersion: apps/v1 kind: Deployment spec:
template: spec: containers: - name: app livenessProbe: httpGet: path: /ops/heartbeat port: 4000
How to check your app is live or not?
KomachiHeartbeat https://hex.pm/packages/komachi_heartbeat Vital monitoring Elixir Web application.
KomachiHeartbeat The name is originate from a great Rubygems :
https://rubygems.org/gems/komachi_heartbeat
Add KomachiHeartbeat. defmodule Example.Router do use Plug.Router plug(:match) plug(:dispatch) forward("/ops",
to: KomachiHeartbeat) end defmodule ExampleWeb.Router do use ExampleWeb, :router forward("/ops", KomachiHeartbeat) end
Check it. % curl http://localhost/ops/heartbeat heartbeat:ok Also available from Zabbix,
ALB health check or Mackerel's "External Http monitor (外形監視)".
Error collection Listening canary song.
Sentry https://sentry.io/ Collect & sort errors. Show the error environments:
stacktrace, HTTP params, app host, release ver… Assign & resolve issue. Integrate with Sass: Slack, GitHub…
Add https://hex.pm/packages/sentry in your app. defmodule Example.Application do use Application
def start(_type, _args) do Logger.add_backend(Sentry.LoggerBackend) … end defmodule Example.Router do use Sentry.Plug … end & add many metadata, by yourself (・﹏・)
Metrics monitoring Know the app behaviour & detect anomary.
Prometheus + Grafana + deadtrickster/beam-dashboards Beautiful. But to keep Prometheus
servers have many toils.
Mackerel https://mackerel.io
Add mackerel-container-agent as a sidecar. --- apiVersion: apps/v1 kind: Deployment
spec: template: spec: containers: - name: app … - name: mackerel-container-agent image: mackerel/mackerel-container-agent:latest imagePullPolicy: Always resources: limits: {memory: 128Mi} env: - {name: MACKEREL_CONTAINER_PLATFORM, value: kubernetes} - name: MACKEREL_KUBERNETES_KUBELET_HOST valueFrom: fieldRef: fieldPath: status.hostIP - name: MACKEREL_KUBERNETES_NAMESPACE valueFrom: fieldRef: {fieldPath: metadata.namespace} - name: MACKEREL_KUBERNETES_POD_NAME valueFrom: fieldRef: {fieldPath: metadata.name} - {name: MACKEREL_ROLES, value: example:app} envFrom: - secretRef: {name: mackerel}
apiVersion: kustomize.config.k8s.io/v1beta1 kind: Kustomization … secretGenerator: - name: mackerel type:
Opaque files: [MACKEREL_APIKEY=secret/MACKEREL_APIKEY]
None
OK. I see container's metrics. How about BEAM metrics?
KomachiHeartbeat + mackerel- plugin-json https://hex.pm/packages/komachi_heartbeat Vital monitoring Elixir Web application.
https://github.com/mackerelio/mackerel-plugin-json Json custom metrics plugin for mackerel.io agent.
KomachiHeartbeat has /stats endpoint that returns app's stats in JSON.
mackerel-plugin-json posts any data gotten from JSON API as Mackerel custome metrics.
We have KomachiHeartbeat.BeamVital . https://github.com/ne- sachirou/ex_komachi_heartbeat/pull/29 (Sorry for under development.)
Add KomachiHeartbeat.BeamVital . defmodule TeijiBot.Router do use Plug.Router plug(:match) plug(:dispatch)
forward( "/ops", to: KomachiHeartbeat, init_opts: [vitals: [KomachiHeartbeat.BeamVital]] ) end
Configure mackerel-plugin-json. --- apiVersion: apps/v1 kind: Deployment spec: template: spec:
volumes: - name: mackerel-agent-config configMap: name: mackerel-agent-config containers: - name: app … - name: mackerel-container-agent image: mackerel/mackerel-container-agent:plugins … env: - {name: MACKEREL_AGENT_CONFIG, value: /etc/mackerel/mackerel.yaml} … volumeMounts: - name: mackerel-agent-config mountPath: /etc/mackerel readOnly: true
--- apiVersion: v1 kind: ConfigMap metadata: name: mackerel-agent-config data: mackerel.yaml:
| plugin: metrics: json: command: | mackerel-plugin-json \ -url="http://localhost:4000/ops/stats" \ -prefix='beam'
None
Current metrics : atom_count memory_ets_tables memory_system_bytes_total atom, binary, code, ets,
other port_count process_count (More, under development.)