Accelerate Your APIs by Using the HAProxy Cache

blog20201021-01.cfg

global
    # global settings

defaults
    # default settings

cache mycache
    total-max-size 4095   # MB
    max-object-size 10000 # bytes
    max-age 30            # seconds

blog20201021-02.cfg

frontend fe_api
    bind :80
    default_backend be_api

backend be_api
    # Get from cache / put in cache
    http-request cache-use mycache
    http-response cache-store mycache

    # server list
    server s1 172.25.0.10:8080 check

blog20201021-03.cfg

http-request cache-use api_cache if { path_beg /api/news_feed/ }
http-response cache-store api_cache

blog20201021-04.sh

$  echo "show cache" | socat tcp-connect:127.0.0.1:9999 -
0x7fcad7c9603a: api_cache (shctx:0x7fcad7c96000, available blocks:4193280)
0x7fcad7c960c0 hash:3075548050 size:363 (1 blocks), refcount:0, expire:10

blog20201021-05.cfg

http-response set-header X-Cache-Status HIT if !{ srv_id -m found }
http-response set-header X-Cache-Status MISS if { srv_id -m found }