The speaker Jan Gehring is the initiator of the Rex Project, which he has developed in his free time since 2010. Jan works for inovex GmbH as a senior linux system architect and designs, optimises and deploys highly scalable, automated linux environments for customers. For 13 years he has been professionally with Linux and open source and could through numerous projects gained extensive practical experience. His duties include the design, construction and operation of systems. His focus is here in the Data Center Automation, highly available and highly scalable web architectures, and Java-based application servers.

1. Keepalived & HA-Proxy as an
alternative to commercial loadbalancer

2. Wer bist du?
● Dein Name
● Was machst du mit Linux
● Warum bist du heute hier (optional)

3. Das Problem
The World
Server
Datacenter
Router
CPU

4. IPTables Cluster (ipt-cluster)
The World
Server
Datacenter
Router
Server
Server

5. Mehr Möglichkeiten
The World
Datacenter
Router
Loadbalancer
Server
Server
Server

6. Single Point of Failure
The World
Server
Datacenter
Router
Server
Loadbalancer
Server

7. Doppelherz
The World
Server
Datacenter
Router
Server
Loadbalancer
Server
Loadbalancer
http://de.wikipedia.org/wiki/Datei:Doppelherz_logo.svg

8. Wenn einer nicht mehr mag...
The World
Server
Datacenter
Router
Server
Loadbalancer
Server
Loadbalancer

9. Übernimmt der Andere
The World
Server
Datacenter
Router
Server
Loadbalancer
Server
Loadbalancer

10. Router
Floating IP
5.9.87.3

11. Router
Floating IP
5.9.87.3

12. Router
Keepalived
5.9.87.3

13. Direct Routing
The World
Server
Datacenter
Router
Server
Keepalived
Server
Keepalived
5.9.78.3
5.9.78.35.9.78.35.9.78.3

14. NAT
The World
Server
Datacenter
Router
Server
Keepalived
Server
Keepalived
5.9.78.3
10.1.1.510.1.1.410.1.1.3
10.1.1.2

15. HA-Proxy
The World
Server
Datacenter
Router
Server
Keepalived
Server
Keepalived
5.9.78.3
HA-ProxyHA-Proxy
10.1.1.510.1.1.410.1.1.3
10.1.1.2

16. HA-Proxy / HTTP
Server
Datacenter
Router
ServerKeepalived
Server
5.9.78.3
HA-Proxy
10.1.1.510.1.1.410.1.1.3
GET / HTTP/1.0
Host: www.foo.org
GET / HTTP/1.0
Host: www.foo.org
X-Forwarded-For: 19.4.1.124
10.1.1.2

17. HA-Proxy / HTTP
Server
Datacenter
Router
ServerKeepalived
Server
5.9.78.3
HA-Proxy
10.1.1.510.1.1.410.1.1.3
GET / HTTP/1.0
Host: www.foo.org
GET / HTTP/1.0
Host: www.foo.org
X-Forwarded-For: 19.4.1.124
10.1.1.2
src dst
19.4.1.124 5.9.78.3
src dst
10.1.1.2 10.1.1.4

18. HA-Proxy / Transparent Proxy
Server
Datacenter
Router
ServerKeepalived
Server
5.9.78.3
HA-Proxy
10.1.1.510.1.1.410.1.1.3
10.1.1.2
src dst
19.4.1.124 5.9.78.3
src dst
19.4.1.124 10.1.1.4
0000000 6f72 746f 783a 303a 303a 723a 6f6f 3a74
0000010 722f 6f6f 3a74 622f 6e69 622f 7361 0a68
0000020 6164 6d65 6e6f 783a 313a 313a 643a 6561
0000030 6f6d 3a6e 752f 7273 732f 6962 3a6e 752f
0000040 7273 732f 6962 2f6e 6f6e 6f6c 6967 0a6e

19. Was haben wir soweit?
The World
Server
Datacenter
Router
Server
Keepalived
Server
Keepalived
5.9.78.3
HA-ProxyHA-Proxy
10.1.1.510.1.1.410.1.1.3
10.1.1.2

20. Fragen?
The World
Server
DatacenterRouter
Server
Keepalived
Server
Keepalived
5.9.78.3
HA-ProxyHA-Proxy
10.1.1.510.1.1.410.1.1.3
10.1.1.2
● Keepalived: http://www.keepalived.org/
● HAProxy: http://www.haproxy.org/
● Beispiel mit Rex: https://github.com/RexOps/service-loadbalancer

21. Vielen Dank für Eure Aufmerksamkeit!
Kontakt
Jan Gehring
Systems Architecture
inovex GmbH
Office Pforzheim
Karlsruhe Straße 71
75179 Pforzheim
+49 (0)173 3181 133
jan.gehring@inovex.de