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
670
野生の onbording と onbording 設計 #kyototechtalk
ne_sachirou
0
640
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
97
名實一致
ne_sachirou
0
680
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
1k
Let's create stateful systems, by Elixir
ne_sachirou
1
960
Other Decks in Programming
See All in Programming
デザインシステムが必須の時代に
yosuke_furukawa
PRO
2
130
Portapad紹介プレゼンテーション
gotoumakakeru
1
130
TROCCO×dbtで実現する人にもAIにもやさしいデータ基盤
nealle
0
390
コンテキストエンジニアリング Cursor編
kinopeee
1
730
MLH State of the League: 2026 Season
theycallmeswift
0
190
為你自己學 Python - 冷知識篇
eddie
1
310
パッケージ設計の黒魔術/Kyoto.go#63
lufia
3
380
【第4回】関東Kaggler会「Kaggleは執筆に役立つ」
mipypf
0
970
もうちょっといいRubyプロファイラを作りたい (2025)
osyoyu
0
210
go test -json そして testing.T.Attr / Kyoto.go #63
utgwkk
1
180
rage against annotate_predecessor
junk0612
0
140
Zendeskのチケットを Amazon Bedrockで 解析した
ryokosuge
3
220
Featured
See All Featured
Product Roadmaps are Hard
iamctodd
PRO
54
11k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
36
2.5k
How GitHub (no longer) Works
holman
315
140k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.4k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
194
16k
Building Applications with DynamoDB
mza
96
6.6k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
139
34k
Embracing the Ebb and Flow
colly
87
4.8k
Facilitating Awesome Meetings
lara
55
6.5k
Balancing Empowerment & Direction
lara
3
600
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
30
9.6k
Imperfection Machines: The Place of Print at Facebook
scottboms
268
13k
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.)