arianna-aondio aondio
aondio
/ Synch two-tier CDN
Created
June 16, 2020 08:54
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| VCP layer: | |
| v_b_r: | |
| # Simply use caching headers. Nothing relevant here. | |
| if beresp.http.X-VCP-Ttl > 0: | |
| beresp.ttl = beresp.http.X-VCP-Ttl | |
| beresp.grace = beresp.http.X-VCP-Grace | |
| beresp.keep = beresp.http.X-VCP-Keep | |
| else: | |
| # Let built-in VCL transform this in a HFM. |
aondio
/ Implement the x-accel header by Ngnix in Varnish
Created
February 24, 2020 09:49
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| varnishtest "implementing x-accel-redirect" | |
| server s1 { | |
| rxreq | |
| expect req.url == "/s1" | |
| txresp -hdr "X-Accel-Redirect: /s2" | |
| rxreq | |
| expect req.url == "/s2" | |
| txresp | |
| } -start |
aondio
/ Serve from cache only if backend is not healthy
Created
February 13, 2020 08:17
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| import std; | |
| sub vcl_recv { | |
| if (!std.healthy(req.backend_hint)) { | |
| set req.grace = 4h; | |
| } | |
| sub vcl_backend_response { |
aondio
/ ESI subrequest retry
Created
January 27, 2020 10:48
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| varnishtest "Cut off ESI request should be retried" | |
| server s1 { | |
| rxreq | |
| expect req.url == "/list" | |
| txresp -body {<esi:include src="/fragment"/>} | |
| rxreq | |
| expect req.url == "/fragment" | |
| txresp -status 503 |
aondio
/ Host based backend
Created
January 14, 2020 14:38
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| sub vcl_recv { | |
| if (req.http.host == "t1.weiyuzw.com") { | |
| set req.backend_hint = origin_t1_weiyuzw; | |
| } | |
| } |
aondio
/ VCL-static
Created
January 9, 2020 13:31
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| vcl 4.0; | |
| import http; | |
| # We define the origin servers | |
| # assumption they listen on port 80, please change it if not true | |
| backend origin_a { | |
| .host = "103.234.96.112"; | |
| .port = "80"; | |
| } |
aondio
/ hash with sick backends
Created
December 18, 2019 08:50
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| varnishtest "hash director with sick backend" | |
| server s1 -repeat 2 { | |
| rxreq | |
| expect req.url == "/s1" | |
| expect req.http.Host == "host2" | |
| txresp -hdr "Server: s1" -body "server1" | |
| } -start | |
| server s2 { |
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| varnishtest ESI | |
| server s1 { | |
| rxreq | |
| txresp -body { | |
| <html> | |
| Before include | |
| <!--esi <esi:include src=""/> --> | |
| After include | |
| } |
aondio
/ Sticky hashing
Created
November 27, 2019 13:39
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| vcl 4.1; | |
| import cookieplus; | |
| import header; | |
| import std; | |
| import directors; | |
| backend default { | |
| .host = "127.0.0.1"; | |
| .port = "8081"; |
aondio
/ grace with sick backends
Created
November 11, 2019 08:51
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| server s1 { # Part 1 requests | |
| rxreq | |
| txresp -body "1" | |
| expect req.url == "/1" | |
| rxreq | |
| txresp -body "2" | |
| expect req.url == "/1" | |
| # Part 2 requests | |
| rxreq |