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
910
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
1.2k
作ってよかったgraceful shutdownライブラリ #kyotogo
ne_sachirou
0
1.1k
path 依存型って何?
ne_sachirou
0
480
野生の onbording と onbording 設計 #kyototechtalk
ne_sachirou
0
570
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
69
名實一致
ne_sachirou
0
610
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
3k
tacit programming : Point-free, Concatenatives & J
ne_sachirou
0
830
Let's create stateful systems, by Elixir
ne_sachirou
1
890
Other Decks in Programming
See All in Programming
ヤプリ新卒SREの オンボーディング
masaki12
0
130
CSC509 Lecture 12
javiergs
PRO
0
160
3rd party scriptでもReactを使いたい! Preact + Reactのハイブリッド開発
righttouch
PRO
1
610
Jakarta EE meets AI
ivargrimstad
0
220
CSC509 Lecture 09
javiergs
PRO
0
140
レガシーシステムにどう立ち向かうか 複雑さと理想と現実/vs-legacy
suzukihoge
14
2.2k
카카오페이는 어떻게 수천만 결제를 처리할까? 우아한 결제 분산락 노하우
kakao
PRO
0
110
よくできたテンプレート言語として TypeScript + JSX を利用する試み / Using TypeScript + JSX outside of Web Frontend #TSKaigiKansai
izumin5210
6
1.7k
Tauriでネイティブアプリを作りたい
tsucchinoko
0
370
リアーキテクチャxDDD 1年間の取り組みと進化
hsawaji
1
220
A Journey of Contribution and Collaboration in Open Source
ivargrimstad
0
970
イベント駆動で成長して委員会
happymana
1
330
Featured
See All Featured
Building Flexible Design Systems
yeseniaperezcruz
327
38k
Building Better People: How to give real-time feedback that sticks.
wjessup
364
19k
Building Your Own Lightsaber
phodgson
103
6.1k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
93
16k
jQuery: Nuts, Bolts and Bling
dougneiner
61
7.5k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
27
4.3k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
44
2.2k
Build The Right Thing And Hit Your Dates
maggiecrowley
33
2.4k
A Modern Web Designer's Workflow
chriscoyier
693
190k
Scaling GitHub
holman
458
140k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
8
900
Art, The Web, and Tiny UX
lynnandtonic
297
20k
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.)