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  • pGina with automatic Kerberos ticket and OpenAFS token/ticket

    - by rolands
    I am currently updating our educational Windows lab images from XP to 7, In doing so we are also migrating from Comtarsia to pGina. Unfortunately somewhere in the transition our automation that fetched kerberos and OpenAFS tickets/tokens on login has completely stopped functioning. Basically what used to happen was, using kfw-3.2.2 and the old OpenAFS release (loopback adapter days), either comtarsia would share password or something with the NIM (Network Identity Manager) which would authenticate against the kerberos server gaining a ticket and AFS token needed to access the users file, this was aided by the fact that our ldap database that windows authenticates against is also what kerberos uses to authenticate so usernames/passwords are the same across both services. I have set up all of the tools, albeit newer 64bit versions which seem to have given me less trouble than the previous releases of NIM/OpenAFS/Krb5, as well as setting their configurations back to what we used to use. Unfortunately this seems to be fubar'd in some way, instead all we get now is a OpenAFS token, most likely I assume from the AFScreds tool which operates some kind of integrated login process, although this does not help in getting a kerberos ticket or a afs ticket for which a login box is provided be NIM after the user logs in. Does anyone know IF it is possible to do what we are trying, and if so how? I was considering writing a pGina plugin which would interact with the server itself but this seems slightly like overkill considering that all these applications already exist...

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  • Apache+LDAP auth on Ubuntu says "Can't contact LDAP server" while ldapsearch is perfect

    - by tw79
    Hi Gurus, I'm migrating from an existing apache+LDAP+mysql+php server to a new hardware platform. Old server is running Debian Lenny, which I have no config documentation available (was done by previous sysadmin); New server is running Ubuntu 10.04.2 LTS 32bit. After installing Apache and configured LDAP client on the new server, ldapsearch to the LDAP master (another dedicated server) returns results just fine. However, when using apache with https, logs complain that "Can't contact LDAP server". I'm authenticating using ldaps and can confirm that 636 port is open on the LDAP master. I can't understand why apache would fail while regular ldapsearch is working! Below is part of the virtualhost config: <Directory /> Options FollowSymLinks AllowOverride None #AuthLDAPEnabled on AuthType Basic AuthBasicProvider ldap AuthName "Private" AuthLDAPURL ldaps://master.ldap.organisation.com:636/ou=people,dc=organisation,dc=com?uid AuthzLDAPAuthoritative off require valid-user AddType application/x-httpd-php .php .phtml <IfModule mod_php4.c> php_flag magic_quotes_gpc Off php_flag track_vars On php_value include_path . </IfModule> </Directory> Any help/suggestion is very much appreciated!

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  • Using a GoDaddy SSL certificate with Virtualmin (Webmin)

    - by Kevin
    A client of mine decided to go ahead and move from a self-signed certificate to a commercial one ("GoDaddy Standard SSL"). The first service I wanted to move to the commercial SSL cert was Webmin/Usermin... However, upon migrating to the new SSL cert and restarting Webmin, I got the following error: [21/Oct/2012:13:12:47 -0400] Restarting Failed to open SSL cert /etc/webmin/miniserv.cert at /usr/share/webmin/miniserv.pl line 4229. Error: Webmin server did not write new PID file And that's all it says. Here's Webmin's config file (/etc/webmin/miniserv.conf): port=10000 root=/usr/share/webmin mimetypes=/usr/share/webmin/mime.types addtype_cgi=internal/cgi realm=Webmin Server logfile=/var/webmin/miniserv.log errorlog=/var/webmin/miniserv.error pidfile=/var/webmin/miniserv.pid logtime=168 ppath= ssl=0 env_WEBMIN_CONFIG=/etc/webmin env_WEBMIN_VAR=/var/webmin atboot=1 logout=/etc/webmin/logout-flag listen=10000 denyfile=\.pl$ log=1 blockhost_failures=5 blockhost_time=60 syslog=1 session=1 server=MiniServ/1.600 userfile=/etc/webmin/miniserv.users keyfile=/etc/webmin/miniserv.pem passwd_file=/etc/shadow passwd_uindex=0 passwd_pindex=1 passwd_cindex=2 passwd_mindex=4 passwd_mode=0 preroot=virtual-server-theme passdelay=1 sudo=1 sessiononly=/virtual-server/remote.cgi preload=virtual-server=virtual-server/virtual-server-lib-funcs.pl virtual-server=virtual-server/feature-unix.pl virtual-server=virtual-server/feature-dir.pl virtual-server=virtual-server/feature-dns.pl virtual-server=virtual-server/feature-mail.pl virtual-server=virtual-server/feature-web.pl virtual-server=virtual-server/feature-webalizer.pl virtual-server=virtual-server/feature-ssl.pl virtual-server=virtual-server/feature-logrotate.pl virtual-server=virtual-server/feature-mysql.pl virtual-server=virtual-server/feature-postgres.pl virtual-server=virtual-server/feature-ftp.pl virtual-server=virtual-server/feature-spam.pl virtual-server=virtual-server/feature-virus.pl virtual-server=virtual-server/feature-webmin.pl virtual-server=virtual-server/feature-virt.pl virtual-server=virtual-server/feature-virt6.pl anonymous=/virtualmin-mailman/unauthenticated=anonymous premodules=WebminCore logouttimes= extracas=/etc/webmin/miniserv.chain certfile=/etc/webmin/miniserv.cert ssl_redirect=0 Here is a screen shot of the Webmin SSL config screen as well, for what it's worth: http://postimage.org/image/r472go7tf/ Edited Mon Oct 22 10:45:24 CDT 2012: When running the command openssl x509 -noout -text -in /etc/webmin/miniserv.cert as Falcon Momot suggested, I get the following error: unable to load certificate 139760808240800:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:696:Expecting: TRUSTED CERTIFICATE

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  • Debian Apache2 and SSL

    - by Topher Fangio
    Hello all, I recently took over a server that is using Apache2 with SSL. I have setup a new server to which I am migrating all of the old websites so that we can more easily scale (it's a cloud server) and so that I can set everything up correctly (or at least with some sort of convention). I have read quite a few articles on setting up Apache2 and SSL with virtual hosts, but I'm a bit confused because all of the examples show three files and I only seem to have two. To compound the problem, they are all named differently (do the file extensions actually make a difference?). The examples show something to this effect: <VirtualHost X.X.X.X:443> ServerAlias something.mydomain.com ServerAdmin [email protected] DocumentRoot /var/www/project/client/site SSLEngine on SSLCertificateFile /etc/ssl/certs/mydomain-cert.pem SSLCertificateKeyFile /etc/ssl/private/mydomain-key.pem SSLCertificateChainFile /etc/ssl/certs/mydomain-ca.crt </VirtualHost> However, the files I have are: _.mydomain.com.crt gd_bundle.crt It is a wildcard certificate that we purchased through GoDaddy I believe. I believe that the first file is the actual certificate file and the gd_bundle.crt is the chain file, but that leaves me without a key file. There is also a random mydomain.csr file lying around on the old server, but it wasn't one of the files bundled with the download from GoDaddy, so I'm not really sure as to what it is. Any help in figuring out what I need to do would be greatly appreciated. I am software developer, so I know my way around computers, but I have only dabbled in server setup/maintenance. Much Thanks!

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  • wuinstall doesn't work with winrs

    - by wizard
    I've been having issues with psexec so I've been migrating to use winrs (part of the winrm system). It's a very nice remoting tool which is proving to be more reliable then psexec. Wuinstall is used to install available windows updates. The two however don't play well together. I'm working on a verity of windows servers 2003, 2008 and 2008r2. Wuinstall behaves the same across all hosts and behaves as expected if executed locally by the same user. Command: winrs -r:server wuinstall /download Produces WUInstall.exe Version 1.1 Copyright by hs2n Informationstechnologie GmbH 2009 Visit: http://www.xeox.com, http://www.hs2n.at for new versions Searching for updates ... Criteria: IsInstalled=0 and Type='Software' Result Code: Succeeded 7 Updates found, listing all: Security Update for Windows Server 2008 R2 x64 Edition (KB2544893) Security Update for .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2 SP1 for x64-based Systems (KB2518869) Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows S erver 2008 R2 SP1 for x64-based Systems (KB2539635) Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows S erver 2008 R2 SP1 for x64-based Systems (KB2572077) Security Update for Windows Server 2008 R2 x64 Edition (KB2588516) Security Update for Windows Server 2008 R2 x64 Edition (KB2620704) Security Update for Windows Server 2008 R2 x64 Edition (KB2617657) Downloading updates ... Error occured: CreateUpdateDownloader failed! Result CODE: 0x80070005 Return code: 1 Googling "0x80070005" finds "unspecified error" which isn't helpful. Thoughts? Is there a better way?

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  • AsteriskNow Migration / Shared Extension Space

    - by Aaron C. de Bruyn
    I am testing the possibility of migrating from an old Avaya phone system to AsteriskNow. The migration would cover several hundred phones--but spread out over several years. (Management wants to move buildings to the new phone system one by one as cables get cut or time permits.) Two other directive is that extensions must not change and they want a GUI that other admins (non-Linux geeks) can manage. They currently use 9XXX for all extensions. We linked the Avaya and Asterisk box via PRI card and they both are communicating. From the Avaya side, if we move (for example) extension 9001 to Asterisk, we forward the call over the PRI to the AsteriskNow box and the SIP phone rings. In AsteriskNow we have an outgoing rule '_9XXX' that routes all 4-digit extensions starting with 9 back to Avaya. Here's the trouble. Dialing 9001 (the extension moved over to AsteriskNow) causes the call to be routed out the PRI to the Avaya box, then the Avaya box routes the call back to Asterisk, and Asterisk routes it to the SIP phone. As we get more and more users switched over, it will use up more and more channels over the PRI card. Is there a way I can ask Asterisk to check it's local extensions first--then forward off to the Avaya system if it starts with '_9XXX'? (I know how I can do it when editing the raw config files, I'm just looking for a way to do it in the GUI so other admins can manage it if necessary.) As a last-ditch plan, I know I can specifically add '_9001' as an outgoing call rule and sent it directly to extension 9001--but I'd really hate to do that for several hundred phones

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  • How does SELinux affect the /home directory?

    - by Matt Solnit
    Hi everyone. I'm migrating a CentOS 5.3 system from MySQL to PostgreSQL. The way our machine is set up is that the biggest disk partition is mounted to /home. This is out of my control and is managed by the hosting provider. Anyway, we obviously want the database files to be on /home for this reason. With MySQL, we did the following: Edited my.cnf and changed the datadir setting to /home/mysql Added a new "File type" policy record (I hope I'm using the right terminology) to set /home/mysql(/.*)? to mysqld_db_t Ran restorecon -R /home/mysql to assign the labels and everything was good. With PostgreSQL, however, I did the following: Edited /etc/init.d/postgresql and changed the PGDATA and PGLOG variables to /home/pgsql/data and /home/pgsql/pgstartup.log, respectively Added a new policy record to set /home/pgsql/pgstartup.log to postgresql_log_t Added a new policy record to set /home/pgsql/data(/.*)? to postgresql_db_t Ran restorecon -R /home/pgsql to assign the labels At this point, I still cannot start PostgreSQL. pgstartup.log says: # cat pgstartup.log postmaster cannot access the server configuration file "/home/pgsql/data/postgresql.conf": Permission denied The weird thing is that I don't see any messages related to this in /var/log/messages or /var/log/secure, but if I turn off SElinux, then everything works. I made sure all the permissions are correct (600 for files and 700 for directories), as well as the ownership (postgres:postgres). Can anyone tell me what I am doing wrong? I'm using the Yum repository from commandprompt.com, version 8.3.7. EDIT: The reason my question specifically mentions the /home directory is that if I go through all these steps for any other directory, e.g. /var/lib/pgsql2 or /usr/local/pgsql, then it works as expected.

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  • How can the little guys effectively learn and use puppet?

    - by drumfire
    Six months ago, in our not-for-profit project we decided to start migrating our system management to a Puppet controlled environment because we are expecting our number of servers to grow substantially between now and a year from now. Since the decision has been made our IT guys have become a bit too annoyed a bit too often. Their biggest objections are: "We're not programmers, we're sysadmins"; Modules are available online but many differ from one another; wheels are being reinvented too often, how do you decide which one fits the bill; Code in our repo is not transparent enough, to find how something works they have to recurse through manifests and modules they might have even written themselves a while ago; One new daemon requires writing a new module, conventions have to be similar to other modules, a difficult process; "Let's just run it and see how it works" Tons of hardly known 'extensions' in community modules: 'trocla', 'augeas', 'hiera'... how can our sysadmins keep track? I can see why a large organisation would dispatch their sysadmins to puppet courses to become puppet masters. But how would smaller players get to learn puppet to a professional level if they do not go to courses and basically learn it via their browser and editor?

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  • Windows XP SP3 client over NAT to a Windows 2008 R2 SP1 file server disconnection

    - by Patrick Pellegrino
    we just transferred a pilot group from our old(!!) Netware infrastructure to an Microsoft infrastructure. Since then, our users got problems accessing their files. They all experience disconnection from the mapped drives. The file server is access via a WAN connection by a firewall (Sonicwall) between both network and we do NAT. All clients have Windows XP SP3 and the file server is an Windows 2008 R2 SP1. On the file server I got many Event Id 2012. Many post over the Internet suggested a problem between the SMB protocol and NAT. We need a short term fix to continue to transfer users from Netware to Microsoft after what will work to remove the NATing. I found this MS KB http://support.microsoft.com/kb/2444558 that suggested a kind of workaround for Windows 7 clients but I can found anything for Windows XP. Anyone can help me with this ? We don't want to stop the project and do a network job before migrating. Regards. Update: Our few Windows 7 computers doesn't seem to have this issue.

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  • Server Performance

    - by sb12
    I know very little about performance tuning of servers etc... so i thought i'd put this up here as i start some research on it, just to get some direction. I am in the process of migrating from my old server to a new one - both are 64 bit machines. One is a few years old, the other brand new (PowerEdge R410). The old server spec is: 2 cpus, 3.4GHz Pentiums, 8G of RAM, Fedora 11 currently installed The new server spec is: 16 cpus, 3.2 GHz Xeon, 16G of RAM, CentOS 6.2 installed. Also RAID10 is on the new server - no RAID on the old one. Both servers currently have the same database (MySQL) with the same data migrated. I wrote a Perl script that simply steps through each row of a table in the database (about 18000 rows) and updates a value in that row. Every row in the table is updated. Out of curiosity i ran this perl script on both machines, just to see how the new server would perform vs. the old one, and it produced interesting results: The old server was twice as fast as the new one to complete. Looking at the database, both are configured exactly the same (the new one being a dump of the old one...)... Anyone any ideas why this would be given the hardware gap between both? As i said i'm about to start some digging, but thought i'd put this up here to maybe get some good direction.... Many thanks in advance..

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  • Adding Static IP's to the NIC

    - by Brett Powell
    We are currently working on migrating a lot of new machines to our network, and my job this morning was to setup all of the IP Addresses. I worked on this all morning, and when I got back tonight I was informed that they had all been setup incorrectly, and had to be removed and re-added. I am quite confused as I have been setting up IP's on machines for a long time and I am curious as to what the issue is. Just taking into account this example... 72.26.196.160/29 255.255.255.248 A /29 block is 5 usable IP's. With the script I wrote and used, the IP Addresses .162 - .166 were added to the NIC. I can't remember now what the name for .161 was, but isn't it the broadcast address or something which isn't assigned to the NIC when adding additional IP Blocks? I am curious as to where my logic is failing me. Not to mention even if .161 was to be added, there is no reason why all of the IPs would have to be removed, as .161 could just be added in addition to these.

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  • How to use a local Leopard Server Mail server acting "like" an Exchange mail server

    - by Richard Chevre
    We have a local Exchange 2003 server (company .local) who is collecting POP3 mail accounts on a distant (company .com) mailserver. The mails are collected by the Exchange server every 5-10 minutes and stored locally (on company .local), so the users can read them without going on the "real" mail server (company.com) What was explaned to me is that the mail collection is made with POP Now we are migrating on Snow Leopard Server. We have chosen to use a new extension for our local domain: .leo So our mailserver's FQDN is mail.company.leo, and the users have a user [email protected] formated mail address. A) All works fine except that I can't find how to tell the mail.company.leo that he must retreive the mails from the "real" public server (mail.company.com) I'm hoping to use IMAP and not POP. I can send mail using SMTP relay from mail.company.leo but (I know it's trivial) answering is not possible, even if I specify the reply-to as [email protected] (this seems to be related to A) ) I don't know if it's very complicated (I suspect not, but...) to achieve what I want to do, and I'm not a genius. But as I'm a little bit lost, I hopesomebody can or will help me. Solving this will allow us to use iCal invitations too, so a lot of services depends of these mailserver settings Some of you discuss the fact thta we choose to use a "new" tld with the .leo extension. We have no problem for that, we could use .local. no problem ;) We used .leo instead of .local just to differentiate the two systems (Exchange and SnowLeopardServer). The question was not about that, it was just to know if we can set a SnowLeopard mail server to act like an Exchange Server. Again thank you for your advice and help Richard Thanks in advance Richard

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  • Choosing the right TV tuner - USB or PCI TV tuners, hardware/software, DVB? Hybrid/combo/analog?

    - by Nucleon
    Greetings, I'll start with some background information so you know what I'm trying to accomplish and then get to my question. I work at a Television station in the US and we are working on setting up an online DVR/Podcast system for all of our newscasts. So basically we would be recording every newscast in HD, encoding it to flv/h.264 for viewing in a browser on flash compatible and iphone/ipad devices, eventually migrating to WebM when it's browser compliant. This task is theoretically pretty simple as it all it involves is a TV tuner device and a program like VLC, MythTV or whatever to schedule and dump it to a file, encode it with VLC/FFMPEG and push it to the streaming server. Now to the hardware, in order to accomplish that task, should I use an internal PCI tuner or a USB 2.0 tuner? Is there a difference? The bus speeds of both are not too far apart, and is the bus speed really relevant in this case? Does it matter if the device has a hardware encoder or a software encoder? On many sites the USB was recommended for ease of set up and use, but would it overly task a processor, or is that not a concern as long as it's a decent PC (at least duo core, 6gb ram). What's the difference between the stick USB and the Box USBs? To my understanding analog is basically gone in the US, so we would want a hybrid or combo tuner correct? How do those differ from DVB? Are there any other features or concepts which I am missing which may influence the recommended product. It would be ideal if the device which could work in both Linux and a Windows environment, to my knowledge most Hauppauge are? Example 1: PCI Hauppage http://www.newegg.com/Product/Product.aspx?Item=N82E16815116033 Example 2: USB 2.0 Box http://www.newegg.com/Product/Product.aspx?Item=N82E16815116029 Example 3: USB 2.0 Stick http://www.newegg.com/Product/Product.aspx?Item=N82E16815116031 Any guidance from the Superusers would be much appreciated!

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  • Can you make a Windows network default user profile NOT apply to a certain operating system?

    - by Jordan Weinstein
    I would like to create a network Default User account for Windows 7 only. This is on a Windows 2003 domain with servers from Windows 2000 to 2008 R2 and Windows XP on workstation side. We're about to do a full migration to Windows 7 and I'd like to start using the network default user profile functionality as we're not migrating user profiles over. Want everyone to start clean. I followed the simple steps from this page: http://support.microsoft.com/kb/973289 under the heading: "How to turn the default user profile into a network default user profile in Windows 7 and in Windows Server 2008 R2" but the problem is that profile would then apply to a new user\admin logging into a 2008 server. That's no good. Anyone have any ideas on how to limit what actually uses that network profile? I was thinking about setting deny permissions for all my admin\service accounts on that "\\dcserver\netlogon\Default User.v2" folder but then it might be timing out and cause other problems. Haven't tried yet as that seems like a bad way of making this work.

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  • django, mod_wsgi, MySQL High CPU - Problems

    - by Red Rover
    Good Evening, and thank you for reading this post. I am having a problem with Django after migrating the dB from SQLlite to MySQL. Initially, for the first 48hours, all ran well. But now we are experiencing high cpu about every 30 minutes. This is a production ESX4i VM host, with 2 x 2.8 ghz CPUs and 12 GB ram. I have allocated 4 cpu's to this VM and 4 GB memory. Any insight into this configuration and help with the spikes in CPU would be appreciated. IT is configured to use the prefork MPM. Outlined are the config's for the different services: MySQL Server version: 5.1.61 Source distribution Django 1.3 mod_wsgi Apache/2.2.15 httpd.conf Timeout 120 KeepAlive Off MaxKeepAliveRequests 400 KeepAliveTimeout 3 prefork MPM StartServers 8 MinSpareServers 8 MaxSpareServers 16 ServerLimit 40 MaxClients 40 MaxRequestsPerChild 0 worker MPM StartServers 16 MaxClients 1024 MinSpareThreads 64 MaxSpareThreads 256 ThreadsPerChild 64 MaxRequestsPerChild 10240 MySQL my.conf [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql symbolic-links=0 [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid my.cnf wsgi.conf LoadModule wsgi_module modules/mod_wsgi.so /etc/httpd/conf.d/wsgi.conf WSGISocketPrefix /var/run/wsgi WSGIPythonEggs /var/tmp WSGIDaemonProcess SITE maximum-requests=10000 WSGIProcessGroup SITE

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  • Apache doesn't immediately notice a change in the document root

    - by Tom
    We use capistrano for website deployments and our Apache document root is a symlink to a particular code release. The deployment procedure switches the symlink from the old release to the new release as the final step of the deployment. We are migrating our webservers from real servers running RHEL 5.6 to Amazon EC2 virtual machines running Ubuntu 11.10 and the new servers are suffering from a problem where Apache doesn't immediately notice the change to it's document root when the symlink is switched. It can take a second or so (and I think I've even seen it take a couple of minutes). It's kind of like Apache has cached the physical path of the symlink for some time. Does anyone know some Apache settings I could look at to get it to "scan" for changes to it's served files quicker. Thoughts: I read that the disks on virtual machines are much slower (since they are network attached storage). Perhaps the filesystem cache somehow works differently too? If so, is there anything that can be done? The website runs PHP code. Perhaps there is some PHP config differences between RHEL and Ubuntu? I checked realpath_cache_ttl but both servers have it commented out: e.g. ; Duration of time, in seconds for which to cache realpath information for a given ; file or directory. For systems with rarely changing files, consider increasing this ; value. ; http://www.php.net/manual/en/ini.core.php#ini.realpath-cache-ttl ;realpath_cache_ttl = 120 We do use the APC opcode cache but don't think it's the issue due to experimentation. The PHP code is in different file paths for each deployment and we ensure stat=1. Here is a similar question that is very interesting: 294107 - but doesn't provide an answer for me. One solution would be to reload Apache everytime we modify the document root symlink. I'll do this if we can't find another solution.

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  • How can I remotely tell what brand/model internal SCSI card is installed in a machine?

    - by edmicman
    I am doing some consulting work for a previous employer upgrading and migrating old servers to new hardware. There is an existing file server (HP ProLiant DL380) that has an tape backup drive connected; it is using a SCSI interface and I'm pretty sure it's using an internal SCSI card. They are upgrading to a new server hardware (HP ProLiant DL160 G6). The old server is 2U, the new one 1U and we would want to move the tape drive to the new server, too. I'm trying to figure out if the SCSI card in the old server would be able to be installed in the new one or if we'll need to source a new card; mostly I don't know for sure the height of the card and if it's low-profile enough that it would fit in the new server. There is not much of a technical resource onsite and the old server is in-use anyway so I would like to avoid making a trip in myself or trying to have someone onsite pop open the case and tell me what card is there. It's running Windows Server 2003 - is there a way to tell from say Device Manager what make and model the SCSI card might be? Or any other system diagnostic program or something that would give me hardware info like that? Thanks for any info!

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  • Using NginX and Apache alongside for both static and dynamic files

    - by faridv
    Background: I've searched a lot and found these useful threads about using of Apache or NginX for static or dynamic files. But they are old (mostly about 1 or 2 years ago) and I think both webservers, specifically Nginx has had important changes in performance and usage. So I think take another look on these issue cannot be that bad. Nginx (for static files) and Apache (for dynamic content)? nginx better than apache for dynamic content? [closed] Apache or NGINX for PHP? Nginx as reverse proxy to Apache with only dynamic content? My question: I have a PHP web application with lots of dynamic files and lots of static contents (videos, images etc.) and it's currently running on a CentOS 6 server and Apache 2.2 since 2 months ago. In past few days, number of our site visitors have gained so fast and I just thought if this number continues to increase with current ratio, we need to change many things (web server, application, etc.) to prevent failures. Because of hardware limitations that we are facing, I thought that it's best for us to start with web server. Should I start with something else? Should I try to increase performance of my PHP application and forget about web server for now? (even if gonna take a long time!) Because of huge usage of .htaccess files (for redirection, rewrites, etc.), I think it's gonna be painful to migrate to NginX as default web server or maybe only for dynamic files. Does this mean that I can't even use Nginx as reverse proxy? I'm not sure latest stable version of NginX and PHP-FPM have a better performance over my current Apache and my limitations (too many things) won't let me to give it a try. Which one is doing better currently? What will I lose by migrating to Nginx? To make it short, what should I do?

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  • Solaris SMF to Upstart on RHEL6

    - by aaa90210
    I am planning a migration from Solaris/x86 to RHEL6. Part of this migration will be migrating services from SMF to the RHEL6 equivalent, which appears to be upstart. While init.d scripts still seem to be supported, I want to take advantage of a more sophisticated init daemon, especially for features like job supervision (restarting etc). I would like to gather some thoughts on a few points: 1) Is upstart an adequate job supervisor, i.e. does it preclude the need for stand-alone managers like daemontools/supervise? 2) Upstart scripts seem very bare-bones compared to a typical init.d script. If I was porting an init.d script to Upstart, is it OK to just "exec /etc/init.d/myjob start"? This include RHEL installed programs like httpd. 3) Does upstart do anything is regards to pid files, and what are it's expectations in regards to the forking model of the process? 4) Are there any straightforward guides to the process management aspect of Upstart...and by that I mean the conditions around controlling restarting? e.g. how many times to restart the process before it goes into a maintenance state, or to ignore errors/core dumps in child processes of the supervised process. Any other relevant ideas or guides would be appreciated. TIA

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  • Request bursting from web application Load Tests

    - by MaseBase
    I'm migrating our web and database hosting to a new environment on all new machines. I've recently performed a Load Test using WAPT to generate load from multiple distributed clients. The server has plenty of room to handle the traffic load, but I'm seeing an odd pattern of incoming traffic during the load tests. Here is the gist of our setup: Firewall server running MS Forefront TMG 2010 on Win 2k8 server Request routing done by IIS Application Request Routing on firewall machine Web server is a Hyper-V VM on the Database server (which is the host OS) These machines are hefty with dual-CPU's with six cores (12 total procs) Web server running IIS 7.5 Web applications built in ASP.NET 2.0, with 1 ISAPI filter (Url Rewrite) in front What I'm seeing during the load tests is that the requests all come through in bursts. Even though I have 7 different distributed clients sending traffic loads, the requests come through about 300-500 requests at a time. The performance monitor shows nearly all of the counters moving through this pattern, where a burst of requests comes in the req/sec jumps to 70, the queued requests jumps to 500, the current requests jumps up, the CPU jumps up, everything. Then once it's handled that group of requests, it has a lull for nearly 10 seconds where nearly nothing is happening. 0-5 req/sec, 0 queued requests, minimal CPU usage. Then after 10 seconds of inactivity, another burst comes through, spiking all of the counters once again. What I can't figure out is why the requests are coming through in bursts when I know that the load being generated is not sent that way, especially considering the various load-generating clients sending traffic all in different intervals with random think time's between each request. Is there something in the layers between Hyper-V or perhaps in the hardware which might cause this coalesce of requests together? Here is what i'm looking at, the highlighted metric is Requests/sec, but the others critical counter go with it: Requests Queued (which I'd obviously like to keep as close to 0 as possible). Any ideas on this?

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  • Should I persist images on EBS or S3 ??

    - by enes
    Hi; I am migrating my Java,Tomcat, Mysql server to AWS EC2. I have already attached EBS volume for storing Mysql data. In my web application people may upload images. So I should persist them. There are 2 alternatives in my mind. 1- Save uploaded images to EBS volume. 2- Use S3 service. The followings are my notes, please be skeptic about them, as my expertise is not on servers, but software development. EBS plus: S3 storage is more expensive. (0.15 $/Gb 0.1$/Gb) S3 plus: Serving statics from EBS may influence my web server's performance negatively. Is this true? Does Serving images affect server performance notably? For S3 my server will not be responsible for serving statics. S3 plus: Serving statics from EBS may result I/O cost, probably it will be minor. EBS plus: People say EBS is faster. S3 plus: People say S3 is more safe for persistence. EBS plus: No need to learn API, it is straight forward to save the images to EBS volume. Namely I can not decide, will be happy if you guide. Thanks

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  • Setup a new domain controller over a temporary VPN, but now Windows delays startup?

    - by Kris Anderson
    I'm migrating servers from colo locations to Amazon's VPC EC2 instances. If anyone hasn't worked with Amazon VPC before, VPN is a pain in the arse! Anyways, I setup a new server that acts as the domain controller for our Amazon VPC. In order to migrate all the user accounts from our existing domain controllers I manually connected to our colo VPN using my user account on the new Amazon EC2 machine. I was able to join the domain and the new Amazon server became another domain controller on our network. So far so good. The problem I'm having is that when booting the EC2 domain controller (which is no longer connected to the VPN so it can't communicate with the existing controllers), it takes a good 6-8 minuted before I can remote into the server (instead of the 1-2 minutes it should take). Also, during this time most of the services we also run (like IIS) also give 404 errors until the 6-8 minutes have passed. It's almost like the domain controller is attempting to reach the other domain controllers first and after 6-8 minutes it falls back to the one located on the local machine? I don't think that's what's happening though, because Server 2008 R2 doesn't have primary and backup domain controllers. They're all equal as far as Windows is concerned. For my network adapter I have only one DNS listed, 127.0.0.1, so it should be looking up the local domain controller and not the other domain controllers it connected to over VPN when VPN was enabled. In the server logs I'm seeing these warnings pop up during a reboot: The winlogon notification subscriber is taking long time to handle the notification event (CreateSession). The winlogon notification subscriber took 409 second(s) to handle the notification event (CreateSession). Any ideas on what's happening here? I would try removing the existing domain controllers from the new Amazon EC2 machine, but I still need to connect over VPN a few times to migrate some data between the servers, and I don't want that change being reflected back to the other domain controllers in our colo locations.

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  • Database problem with MS JET

    - by Zimmy-DUB-Zongy-Zong-DUBBY
    I am migrating a bunch of sites which each use an Access database (or whatever an MDB file is). If I try to load the site, I get the following error: Microsoft OLE DB Provider for SQL Server error '80004005' [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied If I rename the MDB file, I get a complaint that the file does not exist, which makes sense. If the file is named correctly, the site tries to load for about 30 seconds or so, and then just fails with the above message. During this waiting period, I can see a lock file being created (and then at some point removed). The MDB file and it's parent dir have full permissions granted to all users. Given that the lock file is successfully created and removed, I don't think that this is a "real" permission issue. The OS is Windows Server 2003 SP2. I am not sure about much more detail on it's config wrt Access databases. I also don't know what version it is expected to be. VB code in question: set oConn=server.createobject("adodb.connection") DSNtemp="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\fullPathGoesHere\db\sitedb.mdb" oConn.Open DSNtemp

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  • Suggestions for Windows 8 migration [closed]

    - by Big Endian
    I'm thinking of migrating to Windows 8. At first I hated it, but I'm pretty sure the Windows 8 model is the future, and I don't particularly want to end up hating the future like my parents, frustrated and bewildered by anything past Windows XP. I'm currently running Windows 7 and my system has been accumulating some problems. It's probably an accumulation of issues from installing too much software, changing firewall settings, installing Ubuntu alongside Windows, and... well I'm not sure, but my computer has been buggy in unexpected ways lately (freezing and unfreezing, display driver crashing and recovering, and what I call "deep freeze/thaw cycle" where the mouse won't even move for a while). I'm good at solving computer problems, but I can't seem to get to the root of these and my best idea for fixing them is making sure I've backed up every file then re-installing the entire OS. Luckily for me, a new OS is just around the corner so this would be a good time to get two things out of the way at once. The problem I see is that the upgrade options I see are all "seamless". I don't want a seamless upgrade. I want to wipe the slate clean and start all over. Does this mean I will have to buy a full, new copy of Windows 8 rather than one of the cheaper upgrading options? Or does it not make since for me to go to Windows 8 given that I have a laptop, not a tablet? Maybe I should just re-install Windows 7, or even call good enough good enough, try to eliminate the bugs, and start with a fresh slate in 2-3 years after this computer eventually dies entirely from (inevitable) hardware failure. What would be the advantages or disadvantages and costs of each option, how would I go about upgrading to Windows 8 if that's the option I choose, and what is your personal opinion about my situation?

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  • Value of Itanium over x86_64 for Oracle Deployment

    - by Antitribu
    We are looking at a new environment to run our Oracle Database running on SUSE (potentially migrating to RedHat). Our database is approximately 100GB and performs adequately on our current hardware (x86_64) with approximately 6GB of ram allocated to it. We are growing quickly however and will require more performance shortly. Given the cost of Oracle licenses we would like to maximize the value from each license by choosing the most appropriate CPU to run the software on. The questions are: Are there substantial benefits to looking at Itanium hardware, are there any drawbacks? Is there a point where Itanium starts to scale out better? What are the long term support options for Itanium? Given the dominance of x86 would it be safer long term to stick with x86? On average what would be the performance benefit of implementing an Oracle database on Itanium over x86_64? Is this an issue at all or will other factors (IO/RAM) cap out first? If anyone can point me towards some solid documentation on comparisons between the two platforms that provides good case analysis of when to choose which I'm more than happy to accept that as an answer.

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