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
KubeCon Talk 2016- Basics of Kubernetes Service Discovery
Search
Brandon Philips
November 08, 2016
Programming
0
530
KubeCon Talk 2016- Basics of Kubernetes Service Discovery
Demo uses
https://coreos.com/kubernetes/docs/latest/network-troubleshooting.html
Brandon Philips
November 08, 2016
Tweet
Share
More Decks by Brandon Philips
See All by Brandon Philips
Node.js Workflow with Minikube and Skaffold
philips
0
210
Manage the App on Kubernetes
philips
0
300
Production Backbone Monitoring Containerized Apps
philips
0
100
KubeCon EU 2017: Dancing on the Edge of a Volcano
philips
1
530
rkt - KubeCon EU keynote - 2017
philips
1
230
FOSDEM_Keynote_2017-_.pdf
philips
0
75
Tectonic Summit Day 2 Keynote
philips
0
290
Kubernetes: Simple to Manage Anywhere (self-hosted, Tectonic upgrade demo)
philips
0
230
KubeCon Keynote 2016- Distributed Systems Simplified on Kubernetes
philips
2
510
Other Decks in Programming
See All in Programming
R言語の環境構築と基礎 Tokyo.R 112
bob3bob3
0
260
Azure OpenAI Serviceのプロンプトエンジニアリング入門
tomokusaba
3
670
Elm 0.19.0 Changes
bkuhlmann
0
490
Git Rebase
bkuhlmann
11
1.6k
Ruby Pattern Matching
bkuhlmann
0
920
Behind VS Code Extensions for JavaScript / TypeScript Linnting and Formatting
unvalley
5
900
AWS CDKコントリビュートTIPS / aws-cdk-contribution-tips
gotok365
2
100
Ruby Function Composition
bkuhlmann
1
330
ScalarDBを用いたマイクロサービスにおけるデータ管理 (Database Engineering Meetup #2)
scalar
0
110
デフォルトにして至高、RubyMineの大好きな所
ruzia
0
290
PHP8.3の機能を振り返る / Review of PHP 8.3 features
seike460
PRO
1
110
Build Apps for iOS, Android & Desktop in 100% Kotlin With Compose Multiplatform (mDevCamp 2024)
zsmb
0
280
Featured
See All Featured
Practical Orchestrator
shlominoach
182
9.7k
The Straight Up "How To Draw Better" Workshop
denniskardys
227
130k
Visualization
eitanlees
136
14k
Teambox: Starting and Learning
jrom
128
8.4k
Building a Scalable Design System with Sketch
lauravandoore
456
32k
Testing 201, or: Great Expectations
jmmastey
28
6.3k
Building Your Own Lightsaber
phodgson
99
5.7k
Done Done
chrislema
178
15k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
125
32k
Statistics for Hackers
jakevdp
789
220k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
6
1.5k
Docker and Python
trallard
34
2.7k
Transcript
Brandon Philips @brandonphilips |
[email protected]
| coreos.com Kubernetes Service Discovery
Fundamentals and Extensions
90+ Projects on GitHub, 1,000+ Contributors OPEN SOURCE Secure solutions,
support plans, training + more ENTERPRISE CoreOS is Running the World’s Containers Linux
Examples minikube
- Use the quickstart tutorial - Or try out rkt
quickstart - Ensure you get kubectl work: kubectl get nodes NAME STATUS AGE minikube Ready 6m minikube
Overview Label Service Discovery
Fundamental API Server - API Server is bedrock of discovery
- Available at well-known URL - Protected by TLS and accounts
Fundamental Labels
Fundamental Labels
kubectl run nginx --image=nginx -l app=nginx kubectl get replicaset -l
app=nginx kubectl get pods -l app=nginx -w Fundamental Labels
Fundamental Labels
kubectl expose deployment nginx --port 80 --type=NodePort minikube service nginx
Fundamental Labels
Overview Above the API
- Configured statically in kubelet (--cluster-dns) - Injected into /etc/resolv.conf
of containers - Meta alert: DNS Service IP backed by Kubernetes - kubectl describe service -n kube-system kube-dns DNS Add-on
Name: kube-dns Namespace: kube-system Labels: k8s-app=kube-dns Selector: k8s-app=kube-dns Type: ClusterIP
IP: 10.0.0.10 Port: dns 53/UDP Endpoints: 10.1.0.3:53 kube-dns the service
DNS Add-on Basics API Server kube-dns Service 10.0.0.10 dig +vc
-p @10.0.0.10 kube-dns.kube-system.svc.cluster.local ;; QUESTION SECTION: ;kube-dns.kube-system.svc.cluster.local. IN A ;; ANSWER SECTION: kube-dns.kube-system.svc.cluster.local. 30 IN A 10.0.0.10
Copy/paste one-liner to forward DNS to localhost $ dig +vc
-p 5300 @127.0.0.1 cluster.local kube-dns proxy to localhost
$ dig A etcd-0000.default.cluster.local etcde-0001.default.svc.cluster.local. 30 IN A 10.0.0.40 $
dig SRV _client._tcp.etcd-0000.default.cluster.local IN SRV 10 100 2379 etcde-0001.default.svc.cluster.local. DNS Add-on - Records
$ dig A etcd-0000 IN A 10.0.0.40 $ dig A
etcd-0000.default IN A 10.0.0.40 DNS Add-on - Search
Full docs are comprehensive I helped write them :) http://kubernetes.io/docs/admin/dns/
kube-dns full docs
tectonic.com/summit - @TectonicSummit December 12 & 13 2016 - New
York City
Thank you! Brandon Philips @brandonphilips |
[email protected]
| tectonic.com We’re
hiring in all departments! Email:
[email protected]
Positions: coreos.com/ careers