nginx not connecting with varnish

pavs nginx-forum at nginx.us
Wed Jun 27 22:59:18 UTC 2012


I get this varnish error “FetchError no backend connection” 

Varnishlog:

        0 CLI          - Rd ping
        0 CLI          - Wr 200 19 PONG 1340829925 1.0
       12 SessionOpen  c 79.124.74.11 3063 :80
       12 SessionClose c EOF
       12 StatSess     c 79.124.74.11 3063 0 1 0 0 0 0 0 0
        0 CLI          - Rd ping
        0 CLI          - Wr 200 19 PONG 1340829928 1.0
        0 CLI          - Rd ping
        0 CLI          - Wr 200 19 PONG 1340829931 1.0
       12 SessionOpen  c 108.62.115.226 46211 :80
       12 ReqStart     c 108.62.115.226 46211 467185881
       12 RxRequest    c GET
       12 RxURL        c /
       12 RxProtocol   c HTTP/1.0
       12 RxHeader     c User-Agent:
Pingdom.com_bot_version_1.4_(http://www.pingdom.com/)
       12 RxHeader     c Host: www.mysite.com
       12 VCL_call     c recv lookup
       12 VCL_call     c hash
       12 Hash         c /
       12 Hash         c www.mysite.com
       12 VCL_return   c hash
       12 VCL_call     c miss fetch
       12 FetchError   c no backend connection
       12 VCL_call     c error deliver
       12 VCL_call     c deliver deliver
       12 TxProtocol   c HTTP/1.1
       12 TxStatus     c 503
       12 TxResponse   c Service Unavailable
       12 TxHeader     c Server: Varnish
       12 TxHeader     c Content-Type: text/html; charset=utf-8
       12 TxHeader     c Retry-After: 5
       12 TxHeader     c Content-Length: 418
       12 TxHeader     c Accept-Ranges: bytes
       12 TxHeader     c Date: Wed, 27 Jun 2012 20:45:31 GMT
       12 TxHeader     c X-Varnish: 467185881
       12 TxHeader     c Age: 1
       12 TxHeader     c Via: 1.1 varnish
       12 TxHeader     c Connection: close
       12 Length       c 418
       12 ReqEnd       c 467185881 1340829931.192433119
1340829931.891024113 0.000051022 0.698516846 0.000074035
       12 SessionClose c error
       12 StatSess     c 108.62.115.226 46211 1 1 1 0 0 0 256 418
        0 CLI          - Rd ping
        0 CLI          - Wr 200 19 PONG 1340829934 1.0
        0 CLI          - Rd ping
        0 CLI          - Wr 200 19 PONG 1340829937 1.0

---

    netstat -tlnp
     Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address           Foreign Address        
State       PID/Program name
    tcp        0      0 0.0.0.0:8080            0.0.0.0:*              
LISTEN      3086/nginx      
    tcp        0      0 0.0.0.0:80              0.0.0.0:*              
LISTEN      1915/varnishd   
    tcp        0      0 0.0.0.0:22              0.0.0.0:*              
LISTEN      1279/sshd       
    tcp        0      0 127.0.0.2:25            0.0.0.0:*              
LISTEN      3195/sendmail: MTA:
    tcp        0      0 127.0.0.2:6082          0.0.0.0:*              
LISTEN      1914/varnishd   
    tcp        0      0 127.0.0.2:9000          0.0.0.0:*              
LISTEN      1317/php-fpm.conf)
    tcp        0      0 127.0.0.2:3306          0.0.0.0:*              
LISTEN      1192/mysqld     
    tcp        0      0 127.0.0.2:587           0.0.0.0:*              
LISTEN      3195/sendmail: MTA:
    tcp        0      0 127.0.0.2:11211         0.0.0.0:*              
LISTEN      3072/memcached  
    tcp6       0      0 :::8080                 :::*                   
LISTEN      3086/nginx      
    tcp6       0      0 :::80                   :::*                   
LISTEN      1915/varnishd   
    tcp6       0      0 :::22                   :::*                   
LISTEN      1279/sshd  

---

/etc/nginx/site-enabled/default

    server {
    	listen   8080; ## listen for ipv4; this line is default and
implied
    	listen   [::]:8080 default ipv6only=on; ## listen for ipv6
    
    	root /usr/share/nginx/www;
    	index index.html index.htm index.php;
    
    	# Make site accessible from http://localhost/
    	server_name localhost;
    
    	location / {
    		# First attempt to serve request as file, then
    		# as directory, then fall back to index.html
    		try_files $uri $uri/ /index.html;
    	}
    
    	location /doc {
    		root /usr/share;
    		autoindex on;
    		allow 127.0.0.2;
    		deny all;
    	}
    
    	location /images {
    		root /usr/share;
    		autoindex off;
    	}
    
    	#error_page 404 /404.html;
    
    	# redirect server error pages to the static page /50x.html
    	#
    	#error_page 500 502 503 504 /50x.html;
    	#location = /50x.html {
    	#	root /usr/share/nginx/www;
    	#}
    
    	# proxy the PHP scripts to Apache listening on 127.0.0.1:80
    	#
    	#location ~ \.php$ {
    	#	proxy_pass http://127.0.0.1;
    	#}
    
    	# pass the PHP scripts to FastCGI server listening on
127.0.0.1:9000
    	#
    	location ~ \.php$ {
    		fastcgi_pass 127.0.0.2:9000;
    		fastcgi_index index.php;
    		include fastcgi_params;
    	}
    
    	# deny access to .htaccess files, if Apache's document root
    	# concurs with nginx's one
    	#
    	#location ~ /\.ht {
    	#	deny all;
    	#}
    }

---


/etc/nginx/sites-enabled/www.mysite.com.vhost

    server {
           listen 8080;
           server_name www.mysite.com mysite.com.net;
           root /var/www/www.mysite.com/web;
           if ($http_host != "www.mysite.com") {
                     rewrite ^ http://www.mysite.com$request_uri
permanent;
           }
           index index.php index.html;
           location = /favicon.ico {
                    log_not_found off;
                    access_log off;
           }
           location = /robots.txt {
                    allow all;
                    log_not_found off;
                    access_log off;
           }
           # Deny all attempts to access hidden files such as .htaccess,
.htpasswd, .DS_Store (Mac).
           location ~ /\. {
                    deny all;
                    access_log off;
                    log_not_found off;
           }
           location / {
                    try_files $uri $uri/ /index.php?$args;
           }
           # Add trailing slash to */wp-admin requests.
           rewrite /wp-admin$ $scheme://$host$uri/ permanent;
           location ~*  \.(jpg|jpeg|png|gif|css|js|ico)$ {
                    expires max;
                    log_not_found off;
           }
           location ~ \.php$ {
                    try_files $uri =404;
                    include /etc/nginx/fastcgi_params;
                    fastcgi_pass 127.0.0.2:9000;
                    fastcgi_param SCRIPT_FILENAME
$document_root$fastcgi_script_name;
           }
    
    include /var/www/www.mysite.com/web/nginx.conf;
           location ~ /nginx.conf {
                    deny all;
                    access_log off;
                    log_not_found off;
           }
    
    }

---

    /etc/varnish/default.vcl

    # This is a basic VCL configuration file for varnish.  See the
vcl(7)
    # man page for details on VCL syntax and semantics.
    # 
    # Default backend definition.  Set this to point to your content
    # server.
    # 
    backend default {
        .host = "127.0.0.2";
        .port = "8080";
        # .connect_timeout = 600s;
        #.first_byte_timeout = 600s;
        # .between_bytes_timeout = 600s;
        # .max_connections = 800;

---
Note: uncommenting the last four options at default.vcl made no
difference. 

---


cat /etc/default/varnish

    # Configuration file for varnish
    #
    # /etc/init.d/varnish expects the variables $DAEMON_OPTS, $NFILES
and $MEMLOCK
    # to be set from this shell script fragment.
    #
    
    # Should we start varnishd at boot?  Set to "yes" to enable.
    START=yes
    
    # Maximum number of open files (for ulimit -n)
    NFILES=131072
    
    # Maximum locked memory size (for ulimit -l)
    # Used for locking the shared memory log in memory.  If you increase
log size,
    # you need to increase this number as well
    MEMLOCK=82000
    
    # Default varnish instance name is the local nodename.  Can be
overridden with
    # the -n switch, to have more instances on a single server.
    INSTANCE=$(uname -n)
    
    # This file contains 4 alternatives, please use only one.
    
    ## Alternative 1, Minimal configuration, no VCL
    #
    # Listen on port 6081, administration on localhost:6082, and forward
to
    # content server on localhost:8080.  Use a 1GB fixed-size cache
file.
    #
    # DAEMON_OPTS="-a :6081 \
    #              -T localhost:6082 \
    # 	     -b localhost:8080 \
    # 	     -u varnish -g varnish \
    #            -S /etc/varnish/secret \
    # 	     -s file,/var/lib/varnish/$INSTANCE/varnish_storage.bin,1G"
    
    
    ## Alternative 2, Configuration with VCL
    #
    # Listen on port 6081, administration on localhost:6082, and forward
to
    # one content server selected by the vcl file, based on the request.
 Use a 1GB
    # fixed-size cache file.
    #
    DAEMON_OPTS="-a :80 \
                 -T 127.0.0.2:6082 \
                 -f /etc/varnish/default.vcl \
                 -S /etc/varnish/secret \
                 -s
file,/var/lib/varnish/$INSTANCE/varnish_storage.bin,1G"


If you need any other info let me know. I am all out of clue as to whats
the problem.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,228029,228029#msg-228029



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