Varnish: Guru Meditation [closed]

Question

I'm installing Varnish following Varnish 3.0.2 documentation

/etc/varnish/default.vcl

backend default {
    .host = "127.0.0.1";
    .port = "80";
    .connect_timeout = 600s;
    .first_byte_timeout = 600s;
    .between_bytes_timeout = 600s;
}

Lunch command

sudo varnishd -f /etc/varnish/default.vcl -s malloc,200M -T 127.0.0.1:2000 -a 0.0.0.0:8080

Documentation: https://www.varnish-cache.org/docs/3.0/tutorial/backend_servers.html

I just trying to listen on :8080, but i get this error:

Varnishlog

[ps]$ varnishlog

    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118941 1.0
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118944 1.0
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118947 1.0
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118950 1.0
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118953 1.0
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118956 1.0
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118959 1.0
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118962 1.0
   11 SessionOpen  c 173.245.49.79 20945 0.0.0.0:8080
   11 ReqStart     c 173.245.49.79 20945 647832555
   11 RxRequest    c GET
   11 RxURL        c /
   11 RxProtocol   c HTTP/1.1
   11 RxHeader     c Host: webtelevideo.com:8080
   11 RxHeader     c Connection: Keep-Alive
   11 RxHeader     c Accept-Encoding: gzip
   11 RxHeader     c CF-Connecting-IP: 79.41.59.48
   11 RxHeader     c CF-IPCountry: IT
   11 RxHeader     c X-Forwarded-For: 79.41.59.48
   11 RxHeader     c CF-Visitor: {"scheme":"http"}
   11 RxHeader     c User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11
   11 RxHeader     c Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
   11 RxHeader     c Accept-Language: it-IT,it;q=0.8,en-US;q=0.6,en;q=0.4
   11 RxHeader     c Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
   11 RxHeader     c Cookie: __cfduid=d1b65ec66cd2922d0e80af7bd912710f51327781669; mp_super_properties=%7B%22all%22%3A%20%7B%22%24initial_referrer%22%3A%20%22http%3A//www.google.it/url%3Fsa%3Dt%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dweb%26cd%3D6%26ved%3D0CGUQFjAF%26url%3Dhttp
   11 VCL_call     c recv pass
   11 VCL_call     c hash
   11 Hash         c /
   11 Hash         c webtelevideo.com:8080
   11 VCL_return   c hash
   11 VCL_call     c pass pass
   11 FetchError   c no backend connection
   11 VCL_call     c error deliver
   11 VCL_call     c deliver deliver
   11 TxProtocol   c HTTP/1.1
   11 TxStatus     c 503
   11 TxResponse   c Service Unavailable
   11 TxHeader     c Server: Varnish
   11 TxHeader     c Content-Type: text/html; charset=utf-8
   11 TxHeader     c Retry-After: 5
   11 TxHeader     c Content-Length: 418
   11 TxHeader     c Accept-Ranges: bytes
   11 TxHeader     c Date: Mon, 13 Feb 2012 07:42:43 GMT
   11 TxHeader     c X-Varnish: 647832555
   11 TxHeader     c Age: 0
   11 TxHeader     c Via: 1.1 varnish
   11 TxHeader     c Connection: close
   11 Length       c 418
   11 ReqEnd       c 647832555 1329118962.983350515 1329118963.179714441 0.043004036 0.196314096 0.000049829
   11 SessionClose c error
   11 StatSess     c 173.245.49.79 20945 0 1 1 0 1 0 256 418
   11 SessionOpen  c 173.245.49.79 9190 0.0.0.0:8080
   11 ReqStart     c 173.245.49.79 9190 647832556
   11 RxRequest    c GET
   11 RxURL        c /favicon.ico
   11 RxProtocol   c HTTP/1.0
   11 RxHeader     c Host: webtelevideo.com:8080
   11 RxHeader     c Connection: Keep-Alive
   11 RxHeader     c Accept-Encoding: gzip
   11 RxHeader     c CF-Connecting-IP: 79.41.59.48
   11 RxHeader     c CF-IPCountry: IT
   11 RxHeader     c X-Forwarded-For: 79.41.59.48
   11 RxHeader     c CF-Visitor: {"scheme":"http"}
   11 RxHeader     c Accept: */*
   11 RxHeader     c User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.46 Safari/535.11
   11 RxHeader     c Accept-Language: it-IT,it;q=0.8,en-US;q=0.6,en;q=0.4
   11 RxHeader     c Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
   11 RxHeader     c Cookie: __cfduid=d1b65ec66cd2922d0e80af7bd912710f51327781669; mp_super_properties=%7B%22all%22%3A%20%7B%22%24initial_referrer%22%3A%20%22http%3A//www.google.it/url%3Fsa%3Dt%26rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dweb%26cd%3D6%26ved%3D0CGUQFjAF%26url%3Dhttp
   11 VCL_call     c recv pass
   11 VCL_call     c hash
   11 Hash         c /favicon.ico
   11 Hash         c webtelevideo.com:8080
   11 VCL_return   c hash
   11 VCL_call     c pass pass
   11 FetchError   c no backend connection
   11 VCL_call     c error deliver
   11 VCL_call     c deliver deliver
   11 TxProtocol   c HTTP/1.1
   11 TxStatus     c 503
   11 TxResponse   c Service Unavailable
   11 TxHeader     c Server: Varnish
   11 TxHeader     c Content-Type: text/html; charset=utf-8
   11 TxHeader     c Retry-After: 5
   11 TxHeader     c Content-Length: 418
   11 TxHeader     c Accept-Ranges: bytes
   11 TxHeader     c Date: Mon, 13 Feb 2012 07:42:43 GMT
   11 TxHeader     c X-Varnish: 647832556
   11 TxHeader     c Age: 0
   11 TxHeader     c Via: 1.1 varnish
   11 TxHeader     c Connection: close
   11 Length       c 418
   11 ReqEnd       c 647832556 1329118963.855353355 1329118963.855585337 0.000086069 0.000171423 0.000060558
   11 SessionClose c error
   11 StatSess     c 173.245.49.79 9190 0 1 1 0 1 0 256 418
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118965 1.0
    0 CLI          - Rd ping
    0 CLI          - Wr 200 19 PONG 1329118968 1.0

webtelevideo.com:80 works correctly

Answer 1

Your back-end server is not running. You've configured back-end host "127.0.0.1" but should have used "173.245.60.43" (the ip-address of webtelevideo.com).

Answer 2

When you see this error that means most of the case your backend is down. Which is confirmed by your message in varnishlog : Varnish log: 11 FetchError c no backend connection.

Check your origin server is up and your HTTP service (Apache/Nginx/other) is running.