Akamai Connector for Varnish

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Akamai Connector for Varnish akamaidev.io/varnish-connector

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Colin Bendell Director, CTO Office Akamai Dag Finstad Software Developer Varnish Software Davey Shafik Developer Evangelist Akamai

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Simplified Dev; Simplified Ops; Engineered for Performance Akamai Connector for Varnish Performance & Caching The Connector Advanced Uses

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Configuration APIs Monitoring Integrations Client Libraries Edge Logic Akamai CLI Testing developer.akamai.com/devops Akamai for DevOps

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Purge Synchronization Define Cache Rules Ensure Best Practices Defer ESI Processing Device Characteristics Control Refresh Traffic Akamai Connector for Varnish

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Performance & Caching

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The Mobile User Experience

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Page Load Time: Seconds We Have Different Experiences on the Web

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Page Load Time: Seconds Users Expect Web Pages in 2s (even on cellular) But Users Expect Fast

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Performance Impacts Business Metrics

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▼ Wait ├ Caching ├ Protocol opt ├ Route opt. └ Sharding ├ webpack ├ sprites & inlining ├ lazyload └ PWA ▼ Reqs ├ Critical CSS ├ Service Workers ├ AMP └ 4:2:0 Chroma ▲ Render ▼ Bits ├ RWD ├ gzip / br ├ jp2 / webp └ HTTP/2 #WebPerf 101 Web Performance Strategies

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Fixing Performance: Where do you start?

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Performance & Caching

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L1: 0.0005μs L2: 0.007μs L2: 0.030μs RAM: 0.1 μs SSD: 0.15 ms Seek: 10 ms Wifi: 25ms LTE: 75ms 3G: 150ms 1 bit of data accessed from CPU, Memory, Disk, Network Caching is Everywhere (200x L1) (20,000,000x L1) (300,000,000x L1) (1,000,000,000x L1) (10,000,000,000x L1)

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No content

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First Deployment: No Caching 50ms 0ms 500ms TCP + HTTP + Server Think 400ms + 200ms + 500ms = 1,100ms

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Real World 50ms 150ms 500ms TCP + HTTP + Server Think 800ms + 400ms + 500ms = 1,700ms 800ms + 800ms + 800ms = 2,400ms

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Cache at Origin 50ms 150ms 500ms 800ms + 400ms + 1ms = 1,201ms

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Cache at Origin = 800ms + 75 * (400ms + 1ms) TCP + HTTP + Server Think x 75 requests (httparchive.org) ( ) = 30.9 seconds!

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Layers of Cache: Akamai + Origin 50ms 400ms + 100ms + 1ms = 101ms

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Akamai's View of the Internet

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Performance & Caching

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CBC akamai.com/us/en/our-customers/customer-stories-cbc.jsp

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Varnish at Origin with Long Tail content Problem: low offload 80% Offload 30s TTL 90% Offload

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750 500 250 0 mbps 2 June 9 June 16 June 23 June 30 Jun Solution: Coordinated Caches 95+% Offload; Origin Traffic below 100mbps at peak

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3s Page Load Time After: faster page load time 1/3rd total page load time 2s 1s 5s 6s

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The Connector

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Purge Synchronization Define Cache Rules Ensure Best Practices Defer ESI Processing Device Characteristics Control Refresh Traffic Akamai Connector for Varnish

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High Level Architecture Akamai Edge Varnish App Server CCU API

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Installation

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Getting Started (v4 or later) or

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$ cp akamai_connector.repo /etc/yum.repos.d/ $ yum clean all $ yum install varnish-plus-akamai-connector [..] Installed: Varnish-plus-akamai-connector.x86_64 0:0.20170505-1.el7 Complete! $ Installation

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$ akamai-connector-setup.sh

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$ akamai-connector-setup.sh Akamai Connector for Varnish setup Usage: akamai-connector-setup.sh {install|force-*|remove-*|help} install Install the base Akamai VCLs and conf Does not overwrite if destination exists force-vcl Backup and force install the base Akamai VCLs force-conf Backup and force install the Akamai conf force-all Backup and force install the base Akamai VCLs and conf remove-vcl Remove the base Akamai VCLs remove-conf Remove the Akamai conf remove-all Remove the base Akamai VCLs and conf help This message Source: /usr/share/doc/akamai-connector VCL Destination: /etc/varnish Conf Destination: /etc/akamai-connector.conf

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$ akamai-connector-setup.sh install $ Akamai Connector for Varnish setup Installing Source: /usr/share/doc/akamai-connector/akamai_auto.vcl Destination: /etc/varnish Arguments: --no-clobber Success Source: /usr/share/doc/akamai-connector/akamai.vcl Destination: /etc/varnish Arguments: --no-clobber Success Source: /usr/share/doc/akamai-connector/akamai-connector.conf.example Destination: /etc/akamai-connector.conf Arguments: --no-clobber Success

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$ $ vim /etc/varnish/default.vcl /etc/varnish/default.vcl vcl 4.0; import std; backend default { .host = "127.0.0.1"; .port = "8080"; } sub vcl_backend_response { // usual stuff here set beresp.ttl = 5m; } import akamai; include "akamai_auto.vcl";

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$ systemctl reload varnish $ Validating the configuration $

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$ http \ http://localhost/akamai/testobject.html \ Via:"akamai.net(ghost) (AkamaiGHost)" HTTP/1.1 200 OK Content-Length: 20480 Date: Fri, 16 Jun 2017 12:49:54 GMT X-Varnish: 32770 3 Edge-Control: max-age=310, post-check=300 Via: 1.1 varnish-v4, Akamai Connector/1.0.2 Accept-Ranges: bytes Connection: keep-alive Validating the configuration $

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$ $ vim /etc/varnish/default.vcl /etc/varnish/default.vcl vcl 4.0; import std; import akamai; include "akamai_auto.vcl"; backend default { .host = "127.0.0.1"; .port = "8080"; } sub vcl_recv { // usual stuff here } if (req.method == "PURGE") { return (purge); }

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Setting up Purge akamaidev.io/api-credentials Ensure you have the API credentials for the CCU application host = akab-j4ut6lhxxxxk4zg-pfoqijsuxhntuabu.luna.akamaiapis.net client_secret = 6bbwkmp7xXXXX3srdgnwuhmmwgt6raln8uwd2njezo+8= access_token = akab-dzwylxxxxsx2s2fw-7ah4yypbk7bcii65 client_token = akab-cphsxxxxdyrym4-4drvje7rfbyvumfc

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/etc/akamai-connector.conf $ $ vim /etc/akamai-connector.conf # Akamai Connector configuration settings # The purge host to connect to purge_host= # The client token credential for purging purge_client_token= # The client secret credential for purging purge_client_secret= # The access token credential for purging purge_access_token=

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$ systemctl reload varnish $ Validating the configuration $

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$ http PURGE http://localhost/article \ Host:example.com Validating purge configuration { "estimatedSeconds": 5, "purgeId": "01d62080-5295-11e7-af78", "supportId": "17PY1497618559250268-202654912", "httpStatus": 201, "detail": "Request accepted" }

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Hold ‘Til Told

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Example: Sports News Hold 'Til Told WPO Sports WPO Sports wposports.com

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{ "CHC": 0, "CLE": 0 } Cache forever; until it changes Hold 'Til Told

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8:02 8:04 (1-0) 8:48 (1-1) 9:12 (2-1) 9:56 (5-1) 10:08 (5-3) 10:09 (6-3) 10:30 (6-6) 12:24 (8-6) 12:42 (8-7) 12:56 Scores change infrequently, but must be up-to-date What is the Right TTL?

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8:02 8:04 (1-0) 8:48 (1-1) 9:12 (2-1) 9:56 (5-1) 10:08 (5-3) 10:09 (6-3) 10:30 (6-6) 12:24 (8-6) 12:42 (8-7) 12:56 Scores change infrequently, but must be up-to-date How do you keep scores fresh?

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/etc/varnish/default.vcl vcl 4.0; import std; import akamai; include "akamai_auto.vcl"; sub vcl_backend_response { } // Edge TTL set beresp.ttl = 365d; // Downstream TTL set beresp.http.Cache-Control = "max-age=5";

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$ http GET origin.example.com/score/CHC-CLE \ Via:"akamai.net(ghost) (AkamaiGHost)" Testing Hold 'Til Told (Origin) HTTP/1.1 200 OK Edge-Control: max-age=24h,downstream-ttl=5s { "CHC": 0, "CLE": 0 }

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$ http GET example.com/score/CHC-CLE Testing Hold 'Til Told (Edge) HTTP/1.1 200 OK Cache-Control: max-age=5 { "CHC": 0, "CLE": 0 } $

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Grace TTL / Prefresh

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Cache Miss = Poor User Experience Edge Varnish Origin

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Short TTL, but refresh asynchronously Async Refresh & Grace TTL Cache Hit Cache Miss Cache Hit 5min TTL 5min TTL Cache Miss

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Short TTL, but refresh asynchronously Async Refresh & Grace TTL Cache Hit Cache Hit Cache Hit

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/etc/varnish/default.vcl vcl 4.0; import std; import akamai; include "akamai_auto.vcl"; sub vcl_backend_response { set beresp.ttl = 5m; } // Grace TTL set beresp.grace = 30s;

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Varnish Grace TTL to Akamai Prefresh Automatic Translation Cache Hit Grace TTL TTL Prefresh TTL

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Purge Synchronization Define Cache Rules Ensure Best Practices Defer ESI Processing Device Characteristics Control Refresh Traffic Akamai Connector for Varnish

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Optimize your website’s performance for web and mobile automatically Akamai Connector for Varnish Performance & Caching Installation Advanced Uses

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Akamai Connector for Varnish v1 The Beginning of the Journey

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Call To Action • Register and download the Connector today; its free! • Download: https://www.varnish-software.com/products/akamai-connector-for-varnish/ • Documentation: https://akamai-connector.varnish-software.com/akamai-connector-guide.pdf • Support: email to [email protected] • Akamai Developer site: http://akamaidev.io/varnish-connector Reformat: Austin

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Akamai Connector for Varnish Take Action! akamaidev.io/varnish-connector

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Akamai Connector for Varnish akamaidev.io/varnish-connector @ColinBendell @DShafik Dag Finstad