Service Discovery with Consul
•Download as PPTX, PDF•
0 likes•389 views
-Microservices and Service Discovery history and evolution -Service Registry & Service Discovery patterns -Consul main concepts, architecture and use cases
Recommended
Recommended
More Related Content
What's hot
What's hot (20)
Similar to Service Discovery with Consul
Similar to Service Discovery with Consul (20)
More from kloia
More from kloia (20)
Recently uploaded
Recently uploaded (20)
Service Discovery with Consul
- 1. Service Discovery w/ Consul Ali Demirsoy @kloia
- 2. “Digital Transition Accelerator“ 33 Queen St, London EC4R 1AP, United Kingdom blog.kloia.com @kloia_com AND Binası 10-12, 34752 Kozyatagi/Istanbul, Turkey kloia.com Cloud DevOps Test Automation Microservices
- 3. • History • Microservices & Service Discovery • Consul • Demo Agenda
- 4. • Physical Servers & DNS History
- 5. • Load balancer & Many Physical Servers History
- 6. • Virtualization • Web/App/Db layers • Create/Destroy in minutes • Scale up/down dynamically • Manually configure? History
- 7. • Containerization & Microservices • Create/Destroy in ms • Hundreds of Services • Impossible to manage manually History
- 8. • Monolith: Hard to maintain, troubleshoot, evolve • Microservice: Independent, scalable, simple Monolith to Microservices
- 9. Challenges: o Monitoring o Logging o Version and Configuration Management o Distributed Transactions o Service Discovery o … Microservices not a free lunch
- 10. • Start services in any order • Destroy services with confidence • Restart servers safely • Reconfigure services easily Practical Goals
- 11. • Can find services • Can avoid and handle unhealthy services • Can be configured externally Robust Systems
- 12. • Database of available service instances • Two approaches: o Self Registration o Third Party Registration • Heartbeat vs Polling Service Registry
- 13. • Straightforward • Smart clients • Clients and Service Registry coupled Client Side Discovery
- 14. • Dumb clients • Load balancer: SPOF Server Side Discovery
- 15. • High Available, Distributed K/V store • Service Discovery. DNS and HTTP Interface • Flexible Health Checking • Multi Datacenter • Open Source Consul
- 16. Architecture
- 17. • Leader Election • Replicated Logs • Quorum • http://thesecretlivesofdata.com/raft Raft Consensus Algorithm
- 18. • Rest /v1/catalog/services • DNS dig @127.0.0.1 -p 8600 testConsulApp.service.consul SRV • CLI consul kv get myAppConfig • Web UI Consul Interface
- 19. • Register a service: PUT /agent/service/register • List services : GET /agent/services • Maintenance mode: /agent/service/maintenance/:service_id • Health: GET /health/node/:node • K/V store: /kv/:key Consul Rest API
- 20. Defining Watches
- 21. Defining Locks • host1 $ consul lock service/redis/lock redis-server • host2 $ consul lock service/redis/lock redis-server • Active/Passive Architecture
- 22. Defining Locks
- 23. • Zookeeper • Etcd • Netflix Eureka • Marathon-lb Other Tools
- 24. Demo
- 25. Istanbul HashiCorp Meetup https://www.meetup.com/Istanbul- HashiCorp-Meetup/ 20, September 2018 Radisson, Sisli http://devopsdays.istanbul
Editor's Notes
- Kloia introduction
- Manual configuration of load balancer, it didn’t change much because it was physical. So it was manageable.
- We don’t know where our servers are, not even physically.
- Lightweight, faster to start stop, efficient.
- Divide and Conquer
- Reconfigure: feature on/off, maintenance
- Reconfigure: feature on/off, maintenance
- Avoid unhealthy: Load birinde cok fazla olabilir, dead degildir ama hasta olabilir. Oluyse de gracefully handle et.
- dynamic configuration, feature flagging, coordination, leader election
- DNS: legacy friendly, no application required
- Kloia introduction