HTTP routing with Linkerd

A practical example of routing HTTP traffic with Linkerd

Transcript

1. $ echo ‘HTTP routing with Linkerd’
2. $ echo $(whoami)@$(domainname) pierovbg@ncbi.nlm.nih.gov
3. $ man ncbi NAME NCBI – National Center for Biotechnology Information DESCRIPTION World’s go-to place for biomedical and genomic info HISTORY Building software since 1988 ENVIRONMENT Hybrid on-premises & multi-cloud Over 3K services Serving 7K RPS EXAMPLES PubMed, GenBank, PMC, BLAST
4. $ http_proxy=linkerd:4140 curl http://foo.l5d.ncbi.nlm.nih.gov
5. service │ works w/ │ containers & w/o │ │ │ ┌───┴────┐ ┌┴┐ $ http_proxy=linkerd:4140 curl http://foo.l5d.ncbi.nlm.nih.gov └──┬──┘ └────────┬─────────┘ │ │ /etc/hosts │ │ │ │ convention
6. $ curl –H “Host: foo.l5d.ncbi.nlm.nih.gov” http://linkerd:4140
7. service │ │ ┌┴┐ $ curl –H “Host: foo.l5d.ncbi.nlm.nih.gov” http://linkerd:4140 └────────┬─────────┘ └──┬──┘ │ │ │ │ long domain names phobia │ /etc/hosts
8. <Location "/foo"> RequestHeader set Host foo.l5d.ncbi.nlm.nih.gov ProxyPass http://linkerd:4140 </Location>
9. routers: - protocol: http dstPrefix: /http identifier: - kind: io.l5d.header.token header: Host interpreter: ... servers: - port: 4140
10. GET /login HTTP/1.1 Host: foo.l5d.ncbi.nlm.nih.gov
11. /http/foo.l5d.ncbi.nlm.nih.gov
12. /http => /#/rinet/80 /http => /$/domainToPath /gov/nih/nlm/ncbi/l5d => /service /service => /#/consul/.local /service/foo => /service/foo-1 /service/bar => /service/bar-1 /service/baz => /service/baz-1
17. foo bar baz
18. foo l5d bar l5d baz
19. foo-1 l5d bar-1 l5d baz-1 foo-2 bar-2 baz-2
20. foo-1 l5d bar-1 l5d baz-1 foo-2 bar-2 baz-2 CTX CTX CTX CTX
21. $ curl –H “Host: foo.l5d.ncbi.nlm.nih.gov” http://linkerd:4140 \ > -H “l5d-dtab: /service/baz=>/versioned/baz-2”
22. foo-1 l5d bar-1 l5d baz-1 foo-2 bar-2 baz-2 CTX CTX CTX