Muhamad Bhaa Asfour's questions

I am using the AWS Bitnami LAMP AMI on AWS to host multiple WordPress and PHP sites. I am having an issue when I generate a new SSL certificate for a domain using the BNCert tool it’s updating all the vhost apache configuration files for all the other domains to use this certificate which invalidates it on those websites, the server has one IP address and I am using vhost files to configure all the domains.

This is how I am configuring the vhosts in apache:

<VirtualHost *:80>
ServerName example.com
ServerAlias www.example.com
DocumentRoot /opt/bitnami/apache2/htdocs/example.com
<Directory “/opt/bitnami/apache2/htdocs/example.com”>
Options -Indexes +FollowSymLinks -MultiViews
AllowOverride All
Require all granted
</Directory>
</VirtualHost>

I have an Ubuntu 14.4 server which has Nginx on it, I installed Gitlab omnibus package on it which is bundled with it's own Nginx server, So for the sake of using only one Nginx server to save resources i configured Gitlab to use the non bundled server by using this instructions but the problem is that i have the Big Blue Button web conferencing system installed on the server and it's using the port 80, so i couldn't access Gitlab via the browser at all. I tried using the bundled server with different port for it and it worked but is there anyway that i can make Gitlab use the non bundled server but with a different port than 80 or with it's own directory?

I just installed and configured Varnish to work on port 80, and Apache to work on port 8080. I am trying to start Varnish with the command service varnish start, but it gave me this error:

varnishd dead but pid file exists

I edited this configuration in the /etc/sysconfig/varnish:

DAEMON_OPTS="-a :80 \
         -T localhost:6082 \
         -f /etc/varnish/default.vcl \
         -u varnish -g varnish \
         -S /etc/varnish/secret \
         -s file,/var/lib/varnish/varnish_storage.bin,1G"

This is the content of the default.vcl file:

backend default {
  .host = "127.0.0.1";
  .port = "8080";
  .connect_timeout = 600s;
  .first_byte_timeout = 600s;
  .between_bytes_timeout = 600s;
}

sub vcl_recv {
  if (req.request != "GET" &&
    req.request != "HEAD" &&
    req.request != "PUT" &&
    req.request != "POST" &&
    req.request != "TRACE" &&
    req.request != "OPTIONS" &&
    req.request != "DELETE") {
      // Non-RFC2616 or CONNECT which is weird. 
      return (pipe);
  }

  if (req.request != "GET" && req.request != "HEAD") {
    // We only deal with GET and HEAD by default
    return (pass);
  }

  // Remove has_js and Google Analytics cookies.
  set req.http.Cookie = regsuball(req.http.Cookie, 
"(^|;\s*)(__[a-z]+|__utma_a2a|has_js)=[^;]*", "");

  // To users: if you have additional cookies being set by your system 
(e.g.
  // from a javascript analytics file or similar) you will need to add 
VCL
  // at this point to strip these cookies from the req object, otherwise
  // Varnish will not cache the response. This is safe for cookies that 
your
  // backend (Drupal) doesn't process.
  //
  // Again, the common example is an analytics or other Javascript 
add-on.
  // You should do this here, before the other cookie stuff, or by 
adding
  // to the regular-expression above.


  // Remove a ";" prefix, if present.
  set req.http.Cookie = regsub(req.http.Cookie, "^;\s*", "");
  // Remove empty cookies.
  if (req.http.Cookie ~ "^\s*$") {
    unset req.http.Cookie;
  }

  if (req.http.Authorization || req.http.Cookie) {
    // Not cacheable by default 
    return (pass);
  }

  // Skip the Varnish cache for install, update, and cron
  if (req.url ~ "install\.php|update\.php|cron\.php") {
    return (pass);
  }

  // Normalize the Accept-Encoding header
  // as per: http://varnish-cache.org/wiki/FAQ/Compression
  if (req.http.Accept-Encoding) {
    if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg)$") {
      # No point in compressing these
      remove req.http.Accept-Encoding;
    }
    elsif (req.http.Accept-Encoding ~ "gzip") {
      set req.http.Accept-Encoding = "gzip";
    }
    else {
      # Unknown or deflate algorithm
      remove req.http.Accept-Encoding;
    }
  }

  // Let's have a little grace
  set req.grace = 30s;

  return (lookup);
}

sub vcl_hash {
  if (req.http.Cookie) {
    hash_data (req.http.Cookie);
  }
}

// Strip any cookies before an image/js/css is inserted into cache.
sub vcl_fetch {
  if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
    // For Varnish 2.0 or earlier, replace beresp with obj:
    // unset obj.http.set-cookie;
    unset beresp.http.set-cookie;
  }
}

// Set a header to track a cache HIT/MISS.
sub vcl_deliver {
  if (obj.hits > 0) {
    set resp.http.X-Varnish-Cache = "HIT";
  }
  else {
    set resp.http.X-Varnish-Cache = "MISS";
  }
}

sub vcl_error {
  // Let's deliver a friendlier error page.
  // You can customize this as you wish.
  set obj.http.Content-Type = "text/html; charset=utf-8";
  synthetic {"
  <?xml version="1.0" encoding="utf-8"?>
  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
  <html>
    <head>
      <title>"} + obj.status + " " + obj.response + {"</title>
      <style type="text/css">
      #page {width: 400px; padding: 10px; margin: 20px auto; border: 1px 
solid black; background-color: #FFF;}
      p {margin-left:20px;}
      body {background-color: #DDD; margin: auto;}
      </style>
    </head>
    <body>
    <div id="page">
    <h1>Page Could Not Be Loaded</h1>
    <p>We're very sorry, but the page could not be loaded properly. This 
should be fixed very soon, and we apologize for any inconvenience.</p>
    <hr />
    <h4>Debug Info:</h4>
    <pre>Status: "} + obj.status + {"
Response: "} + obj.response + {"
XID: "} + req.xid + {"</pre>
      </div>
    </body>
   </html>
  "};
  return(deliver);
}

How do I fix this problem?

I am trying to install Varnish on CentOS 5.5 using command yum install varnish, but the installation procedure can't be completed because of this warning message:

warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID ...... Public key for libedit-20090923-3.0_1.el5.rf.x86_64.rpm is not installed

How do I solve this problem?

I have a vb 3.8.4 forum and a drupal pressflow 6.22 site on together on my hosting server

When i added the drupal site to the server I had a lot of performance problems in the server

And sometimes it made the server go down

Here is the host server specifications :

• Operating system CentOS Linux 5.5
• Webmin version 1.560
• Kernel and CPU Linux 2.6.18-194.26.1.el5 on x86_64 Processor information Intel(R) Pentium(R) Dual CPU E2160 @ 1.80GHz, 2 cores
• Real memory 3.74 GB total, 2.35 GB used Virtual memory 4 GB total, 124 kB used
• Local disk space 1.76 TB total, 147.63 GB used

Here is the basic apache setting :

• Apache MPM Prefork
• HostnameLookups Off
• AllowOverride None
• MaxClients 100
• ThreadsPerChild 25
• StartServers 8
• MaxRequestsPerChild 4000
• mod_deflate is enabled
• mod_expires is enabled

Here is the basic php.ini settings:

• safe_mode = on
• max_execution_time = 1200
• max_input_time = 1200
• memory_limit = 1500M

Here is the mysql settings :

• max_allowed_packet=3G
• max_connections=200
• wait_timeout=30
• thread_cache=50
• connect_timeout=30
• query_cache_limit=1M
• interactive_timeout=30

Here is the top cpu command result:

Here is the free -m and iostat commands result:

Here is the mysqladmin -u root -p ext -ri 30 | grep tmp_disk_tables command result:

• | Created_tmp_disk_tables | 1771 |
• | Created_tmp_disk_tables | 2 |
• | Created_tmp_disk_tables | 5 |
• | Created_tmp_disk_tables | 3 |
• | Created_tmp_disk_tables | 7 |
• | Created_tmp_disk_tables | 0 |

We installed : ffmpeg,gd libraries and zend optimizer

The cpu load average is always above 3

So anyone can help me with this ?

If you need any additional necessary information just ask in comments ?