Home / server / Questions / 548559
In Process
WoooHaaaa
Asked: 2013-10-25 22:37:43 +0800 CST

Nginx + Nagios : 502 Bad gateway

  • 772

I have a fully new install nagios, but I can't access to it.

Here's my Nginx config:

server{
    listen 80;
    server_name  [redacted];

    # blahblah

    # Nagios Monitoring
    location /nagios3/ {
      proxy_pass  http://127.0.0.1:80;
    }
}

Nagios is installed step by step(From this Linode guide):

sudo apt-get install -y nagios3

Then I try to visit http://ip-address/nagios3/, but it shows 502 bad gateway. How do I deal with this ?

This is my /var/log/syslog:

Oct 25 14:18:17 my-server nagios3: SERVICE ALERT: localhost;Disk Space;WARNING;SOFT;1;DISK WARNING - free space: /boot 43 MB (20% inode=99%):
Oct 25 14:19:07 my-server nagios3: SERVICE ALERT: localhost;HTTP;WARNING;SOFT;1;HTTP WARNING: HTTP/1.1 403 Forbidden - 319 bytes in 0.000 second response time
Oct 25 14:19:17 my-server nagios3: SERVICE ALERT: localhost;Disk Space;WARNING;SOFT;2;DISK WARNING - free space: /boot 43 MB (20% inode=99%):
Oct 25 14:20:07 my-server nagios3: SERVICE ALERT: localhost;HTTP;WARNING;SOFT;2;HTTP WARNING: HTTP/1.1 403 Forbidden - 319 bytes in 0.000 second response time
Oct 25 14:20:17 my-server nagios3: SERVICE ALERT: localhost;Disk Space;WARNING;SOFT;3;DISK WARNING - free space: /boot 43 MB (20% inode=99%):
Oct 25 14:21:07 my-server nagios3: SERVICE ALERT: localhost;HTTP;WARNING;SOFT;3;HTTP WARNING: HTTP/1.1 403 Forbidden - 319 bytes in 0.000 second response time
Oct 25 14:21:17 my-server nagios3: SERVICE ALERT: localhost;Disk Space;WARNING;HARD;4;DISK WARNING - free space: /boot 43 MB (20% inode=99%):
Oct 25 14:21:17 my-server nagios3: SERVICE NOTIFICATION: root;localhost;Disk Space;WARNING;notify-service-by-email;DISK WARNING - free space: /boot 43 MB (20% inode=99%):
Oct 25 14:21:17 my-server postfix/pickup[24474]: 4F89F394034C: uid=109 from=<nagios>
Oct 25 14:21:17 my-server postfix/cleanup[27756]: 4F89F394034C: message-id=<20131025062117.4F89F394034C@my-server>
Oct 25 14:21:17 my-server postfix/qmgr[24475]: 4F89F394034C: from=<nagios@[email protected]>, size=594, nrcpt=1 (queue active)
Oct 25 14:21:17 my-server postfix/local[27758]: 4F89F394034C: to=<root@localhost>, relay=local, delay=0.15, delays=0.11/0/0/0.04, dsn=2.0.0, status=sent (delivered to mailbox)
Oct 25 14:21:17 my-server postfix/qmgr[24475]: 4F89F394034C: removed
Oct 25 14:22:07 my-server nagios3: SERVICE ALERT: localhost;HTTP;WARNING;HARD;4;HTTP WARNING: HTTP/1.1 403 Forbidden - 319 bytes in 0.000 second response time
Oct 25 14:22:07 my-server nagios3: SERVICE NOTIFICATION: root;localhost;HTTP;WARNING;notify-service-by-email;HTTP WARNING: HTTP/1.1 403 Forbidden - 319 bytes in 0.000 second response time
Oct 25 14:22:07 my-server postfix/pickup[24474]: 219CA3940381: uid=109 from=<nagios>
Oct 25 14:22:07 my-server postfix/cleanup[27756]: 219CA3940381: message-id=<20131025062207.219CA3940381@my-server>
Oct 25 14:22:07 my-server postfix/qmgr[24475]: 219CA3940381: from=<nagios@[email protected]>, size=605, nrcpt=1 (queue active)
Oct 25 14:22:07 my-server postfix/local[27758]: 219CA3940381: to=<root@localhost>, relay=local, delay=0.12, delays=0.07/0/0/0.05, dsn=2.0.0, status=sent (delivered to mailbox)
Oct 25 14:22:07 my-server postfix/qmgr[24475]: 219CA3940381: removed
Oct 25 14:39:01 my-server CRON[28242]: (root) CMD (  [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -depth -mindepth 1 -maxdepth 1 -type f -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir fuser -s {} 2>/dev/null \; -delete)

And there're lot of 127.0.0.1 visit in nginx log, but I actually visit from a external ip:

127.0.0.1 - - [25/Oct/2013:14:21:02 +0800] "GET /nagios3/ HTTP/1.0" 502 575 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/3      0.0.1599.69 Safari/537.36"
127.0.0.1 - - [25/Oct/2013:14:21:02 +0800] "GET /nagios3/ HTTP/1.0" 502 575 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/3      0.0.1599.69 Safari/537.36"
127.0.0.1 - - [25/Oct/2013:14:21:02 +0800] "GET /nagios3/ HTTP/1.0" 502 575 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/3      0.0.1599.69 Safari/537.36"
ubuntu

1 Answers

  1. you forgot to start apache: sudo /etc/init.d/apache2 start

    and you should set:

    server_tokens off;

    in your nginx.conf

    • 0