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  • Backing up data (including mysqldumps) to S3

    - by seengee
    We have a web app on a number of servers and we want to add an additional layer of redundancy by backing up the key data to S3. The key data is the MySQL database and a folder containing dynamically created site assets - predominantly images. Some kind of rsync based solution would initially seem the best plan. A couple of years ago we played with S3cmd (in particular s3cmd sync) with some success but we didn't find it particularly reliable although this may have changed since. Its occurred to me though that a rsync solution might not work particularly well with a single db.sql file created with mysqldump and I assume this means the whole database getting transferred each time, with multiple databases of over 1GB this is going to add up to a lot of traffic (and $s) very quickly. With the image files I could simply just transfer files modified within the last day which would be far more simple. What approach should I look at?

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  • Best idea dataserver serving small pictures 40 ko

    - by Nicolas Manzini
    I'm designing the server structure for my application in case things go well. I have one server DB connected to multiple server who process connections. All those with lots of RAM and fast processors. (still looking for a way to use the multithread because now it's dumb apache php... so loooots of ram needed). Upon an answer from those servers, the client can then connect to another server to retrieve pictures using the address he previously got from the db. Is it a good idea to have one database server with let's say nginx and ssd disk having to send all pictures to everybody? or should I have multiple server accessing to a shared ssd disk drive or multiple disk updating each other? Also should I put a lot of RAM on the database server? because probably there wont be a picture more popular than another.

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  • Logging off does not kill process in Windows Server 2003

    - by user25951
    I have a Windows Server 2003(Enterprise, SP2). My understanding was that any process created by a user will be terminated when the user loggs off the account. But its not happening. I login via Administrator account. Start a simple java process and logoff. But the process is not killed. Is there any configuration for this or something? I am mostly a software programmer and not much in to servers and so I am stuck. I found out that while logging off, 1) Win32 is supposed to send a CTRL_LOGOFF_EVENT to all processes started by that user. 2) JVM is supposed to handle this event and terminate the VM. But I can't understand why my java process is not killed when i logoff. Any idea!!!

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  • Mail sent from local Postfix marked as "possible phishing" in Outlook

    - by leo grrr
    Hi folks, Sorry for the newbie question--this is not my area of expertise by a long shot. I work at a small development shop and we finally got around to doing code reviews. (Yay!) I set up an instance of Review Board -- an open-source code review tool -- on one of our local servers but it doesn't seem to like talking to our hosted Exchange server to send notification emails. I decided to just install Postfix on that same box and send mail from localhost, which is working much more reliably, but Outlook disables all links in the email announcements and marks it as possible phishing. What is making these emails look suspicious and what can I change? Would the best thing be to figure out how to relay to Exchange from Postfix? Thanks!

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  • Reccomendation for tuning 100's of SQL Databases

    - by wayne
    I'm running several SQL servers, each running a few hundred multi-gig databases for customers. They are all setup homogeneously as far as the schemas are concerned, however customer usages of the data differ quite a lot from database to database. What would be the best way to auto-index/profile/tune this large amount of databases? As there are at least 600 or more catalogs I cant have someone manually profile, and index as required by each databases usage patterns. I'm currently running SQL 2005 but will be moving to 2008, so solutions that work with either are fine.

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  • Rsync over ssh with root access on both sides

    - by Tim Abell
    Hi, I have one older ubuntu server, and one newer debian server and I am migrating data from the old one to the new one. I want to use rsync to transfer data across to make final migration easier and quicker than the equivalent tar/scp/untar process. As an example, I want to sync the home folders one at a time to the new server. This requires root access at both ends as not all files at the source side are world readable and the destination has to be written with correct permissions into /home. I can't figure out how to give rsync root access on both sides. I've seen a few related questions, but none quite match what I'm trying to do. I have sudo set up and working on both servers.

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  • Upgrade no raid server to raid

    - by AZee
    I have just learned that our PDC has a single drive with 2 partitions. I also know that this drive has bad blocks as recorded in the event log. What I would like to do is to convert this to a RAID solution with a nice balance between economy and performance. I will admit that I have only configured servers with RAID from scratch, and have no experience upgrading an existing system into a RAID system. In fact, I'm not sure it is even possible. Since this is the PDC for 350+ workstations downtime is important. I'd like to hear from other System Administators how they would tackle this and their recommendations for all devices. At this time it seems to me that I can replace the existing drive and then restore from backup or install a controller, drives, configure the RAID an basically start from scratch. Thank you for taking your time. ~AZee

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  • Rails 2 and Ngnix: https pages can't load css or js (but will load graphics)

    - by Max Williams
    ADMISSION: i've posted this same question on stackoverflow, before realising it's probabaly better suited to superuser, but it kind of depends on the answer: If it turns out to be a problem in my nginx config, it's definitely superuser. If it turns out to be a problem in my Rails config (or code) then it's arguably stackoverflow. I'm adding some https pages to my rails site. In order to test it locally, i'm running my site under one mongrel_rails instance (on 3000) and nginx. I've managed to get my nginx config to the point where i can actually go to the https pages, and they load. Except, the javascript and css files all fail to load: looking in the Network tab in chrome web tools, i can see that it is trying to load them via an https url. Eg, one of the non-working file urls is https://cmw-local.co.uk/stylesheets/cmw-logged-out.css?1383759216 I have these set up (or at least think i do) in my nginx config to redirect to the http versions of the static files. This seems to be working for graphics, but not for css and js files. If i click on this in the Network tab, it takes me to the above url, which redirects to the http version. So, the redirect seems to be working in some sense, but not when they're loaded by an https page. Like i say, i thought i had this covered in the second try_files directive in my config below, but maybe not. Can anyone see what i'm doing wrong? thanks, Max Here's my nginx config - sorry it's a bit lengthy! I think the error is likely to be in the first (ssl) server block: server { listen 443 ssl; keepalive_timeout 70; ssl_certificate /home/max/work/charanga/elearn_container/elearn/config/nginx/certs/max-local-server.crt; ssl_certificate_key /home/max/work/charanga/elearn_container/elearn/config/nginx/certs/max-local-server.key; ssl_session_cache shared:SSL:10m; ssl_session_timeout 10m; ssl_protocols SSLv3 TLSv1; ssl_ciphers RC4:HIGH:!aNULL:!MD5; ssl_prefer_server_ciphers on; server_name elearning.dev cmw-dev.co.uk cmw-dev.com cmw-nginx.co.uk cmw-local.co.uk; root /home/max/work/charanga/elearn_container/elearn; # ensure that we serve css, js, other statics when requested # as SSL, but if the files don't exist (i.e. any non /basket controller) # then redirect to the non-https version location / { try_files $uri @non-ssl-redirect; } # securely serve everything under /basket (/basket/checkout etc) # we need general too, because of the email/username checking location ~ ^/(basket|general|cmw/account/check_username_availability) { # make sure cached copies are revalidated once they're stale add_header Cache-Control "public, must-revalidate, proxy-revalidate"; # this serves Rails static files that exist without running # other rewrite tests try_files $uri @rails-ssl; expires 1h; } location @non-ssl-redirect { return 301 http://$host$request_uri; } location @rails-ssl { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_read_timeout 180; proxy_next_upstream off; proxy_pass http://127.0.0.1:3000; expires 0d; } } #upstream elrs { # server 127.0.0.1:3000; #} server { listen 80; server_name elearning.dev cmw-dev.co.uk cmw-dev.com cmw-nginx.co.uk cmw-local.co.uk; root /home/max/work/charanga/elearn_container/elearn; access_log /home/max/work/charanga/elearn_container/elearn/log/access.log; error_log /home/max/work/charanga/elearn_container/elearn/log/error.log debug; client_max_body_size 50M; index index.html index.htm; # gzip html, css & javascript, but don't gzip javascript for pre-SP2 MSIE6 (i.e. those *without* SV1 in their user-agent string) gzip on; gzip_http_version 1.1; gzip_vary on; gzip_comp_level 6; gzip_proxied any; gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript; #text/html # make sure gzip does not lose large gzipped js or css files # see http://blog.leetsoft.com/2007/7/25/nginx-gzip-ssl gzip_buffers 16 8k; # Disable gzip for certain browsers. #gzip_disable "MSIE [1-6].(?!.*SV1)"; gzip_disable "MSIE [1-6]"; # blank gif like it's 1995 location = /images/blank.gif { empty_gif; } # don't serve files beginning with dots location ~ /\. { access_log off; log_not_found off; deny all; } # we don't care if these are missing location = /robots.txt { log_not_found off; } location = /favicon.ico { log_not_found off; } location ~ affiliate.xml { log_not_found off; } location ~ copyright.xml { log_not_found off; } # convert urls with multiple slashes to a single / if ($request ~ /+ ) { rewrite ^(/)+(.*) /$2 break; } # X-Accel-Redirect # Don't tie up mongrels with serving the lesson zips or exes, let Nginx do it instead location /zips { internal; root /var/www/apps/e_learning_resource/shared/assets; } location /tmp { internal; root /; } location /mnt{ root /; } # resource library thumbnails should be served as usual location ~ ^/resource_library/.*/*thumbnail.jpg$ { if (!-f $request_filename) { rewrite ^(.*)$ /images/no-thumb.png break; } expires 1m; } # don't make Rails generate the dynamic routes to the dcr and swf, we'll do it here location ~ "lesson viewer.dcr" { rewrite ^(.*)$ "/assets/players/lesson viewer.dcr" break; } # we need this rule so we don't serve the older lessonviewer when the rule below is matched location = /assets/players/virgin_lesson_viewer/_cha5513/lessonViewer.swf { rewrite ^(.*)$ /assets/players/virgin_lesson_viewer/_cha5513/lessonViewer.swf break; } location ~ v6lessonViewer.swf { rewrite ^(.*)$ /assets/players/v6lessonViewer.swf break; } location ~ lessonViewer.swf { rewrite ^(.*)$ /assets/players/lessonViewer.swf break; } location ~ lgn111.dat { empty_gif; } # try to get autocomplete school names from memcache first, then # fallback to rails when we can't location /schools/autocomplete { set $memcached_key $uri?q=$arg_q; memcached_pass 127.0.0.1:11211; default_type text/html; error_page 404 =200 @rails; # 404 not really! Hand off to rails } location / { # make sure cached copies are revalidated once they're stale add_header Cache-Control "public, must-revalidate, proxy-revalidate"; # this serves Rails static files that exist without running other rewrite tests try_files $uri @rails; expires 1h; } location @rails { proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_read_timeout 180; proxy_next_upstream off; proxy_pass http://127.0.0.1:3000; expires 0d; } }

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  • How can I restrict the backuppc client user as much as possible? (rsync)

    - by jxn
    I have backuppc making full backups of servers, but I'd like to be sure that my set up is as paranoid as possible. BackupPC is set up to backup via rsync, and it is set up to use a specific user on each client to be backed up. Because the backuppc client user has to have access to every file on the client machine and the ability to ssh into the machine without an interactive password, I'm a little nervous about securing the clients, and I'd like to know I haven't overlooked any options. Here's what I have in place: in the client user's authorized_keys file, i've included from="IPTOSERVER",command="/usr/bin/rsync" before the user's public key, so that the user can only login coming from the BackupPC server. Next, in the sudoers file, I've added this line: backuppc ALL=NOPASSWD: /usr/bin/rsync to allow root-level permissions only for the rsync command for that user. Are there other user, policy, or ssh restrictions that I can add while still allowing the backup pc client user to rsync all files?

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  • Windows 2003 SP1 terminal server printers Disappear after reboot - HP laserjet 4240

    - by Alex
    had working PCL6 laserjet 4240 driver. needed to downgrade to PCl5, tried but did not get clean install. tried again and it seemed to work (this is 2003 enterprise terminal server SP2) Have over 40 working laserjets (5, 4000, 4100 and 18 of the 4240) After normal nightly reboot the 18 4240 printers were 'gone'. Worked w/Microsoft who said bad HP driver issues - weird since they work on other terminal servers. downloaded latest version, etc. from HP site and can NOT get to work. As soon as I install, then do a Net Stop Spool and Net Start Spooler the printer is 'gone'. Current workaround is to use HP 4000 PCL5 drivers for all of these 4240 printers.

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  • How to accelerate and notice failure of potentially faulty disks

    - by rainier
    Hey, I got a bunch of 'used' servers, whose disks should have been checked, but they have been shipped around the county in crate which can't help. I just had one disk go bad (despite being mirrored, currently trying to get more details). The server was fine for about a week before everything ground to a halt this afternoon. Is there any way 'accelerate' the failure of faulty disks, with the goal of bringing the disk to failure before we launch production services? Would doing lots of I/O with 'dd' or 'iozone' be a good way to test these potentially faulty disks? Any other tests/tools that would help recognized failures before they happen?

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  • How SmartDNS Works

    - by Emad
    If you travel outside the US you'll notice that most of the streaming services like Netflix, Pandora, hulu etc are blocked, usually by the service providers themselves. To get around that, people use VPN services. They basically tunnel your traffic through a US server so your requests seem like they are originating in the US. These VPN services fix this blocking problem, but make your connection slower than the normal unVPNed connection. Recently however I've come across something called SmartDNS provided by overplay.net. You pay $5 a month and you get access to their DNS servers. After you change to their DNS you get access to the blocked streaming sites, without slowing down your normal traffic like email and browsing. What I'd like to know is the technical details of how this SmartDNS works. I've done some quick research but that didn't turn up anything of substance. Anybody out there knows?

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  • Cross domain LDAP

    - by Adam
    For a system we are developing we have 2 domains an internal and an external domain with bi directional trust between them. However the servers are only able to connect to their own DC's. We have an application server on the internal domain which needs to use an LDAP query to gather a list of users from a group on the external domain. How do i go about writing an LDAP query that asks one DC to go ask another DC for a list of users. I tried querying the internal DC with the same LDAP query I would use if it could hit the external DC directly but this does not work. When i use Softerra LDAP Administraor I can view the full hierarchy of the interal domain but despite the trust relationship between domains i am unable to see any of the external doamin. Any suggestions or help would be greatly appreciated

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  • VirtualBox cloned Ubuntu Server network error

    - by Luke
    I run a number of virtual servers on my network and I want to be able to easily clone base installations of Ubuntu Server. I use the VBoxManage command to clone the actual hard disk and I then create a new profile for my VM and copy over the settings of the original VM. However, when I boot into the cloned VM, there seems to be a network problem. When I issue a PING I get the message "Network unreachable". I traced it down to the fact that the virtual network card of the cloned VM has a different MAC address then the original VM. When I copy the MAC address the clone seems to work fine. How can I have the cloned VM have it's own MAC address?

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  • How do I configure ubuntu server's iptables to allow java without opening the floodgates?

    - by rofls
    I'm new to servers, so please bear with me. I have my amateur site running. Problem is, I followed Rackspace's instructions on setting up iptables and am pretty sure that's why the java server I'm trying to use on port 8080 isn't working (it runs the script but my android test app doesn't connect to it). When I try running the same java server script on port 80 it doesn't even start. I also ran nmap on my domain and saw that indeed only port 80 and 22 (for ssh) are responding. Is it possible to run Java and apache happily on the same server? If so, how can I configure my iptables correctly. (I'm aware that I should probably do some sort of filtering in the java server itself, but will figure that out later).

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  • Apache httpd + FreeTDS hangs until restarted

    - by Jordan Reiter
    Every so often requests to a Linux server (say, linux.example.org) where the web app (Django) pulls in data from a SQL Server database via FreeTDS will hang. Requests on other servers pointing to the database still work, as do requests on linux.example.org that use local MySQL databases. Only the server plus FreeTDS appear to be affected. Restarting httpd makes the database connections work correctly again. What could cause this problem? Using: Centos 5.9 freetds 0.91 Apache httpd 2.2.3 /etc/obdc.ini: [DSN] Description = SQL Server 2005 Driver = FreeTDS ;Database = dbname Servername = SERVERNAME ;TDS_Version = 8.0 /etc/freetds.conf: [SERVERNAME] driver = /usr/lib64/libtdsodbc.so host = db.example.org port = 1433 tds version = 8.0 client charset = UTF-8

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  • WGet from one site on a server to another site on the same server

    - by JoshReedSchramm
    Hey all, I've recently been asked to administer a couple ubuntu boxes running web servers. I'm a dev by trade so if this question is fairly noob please forgive. We have about a dozen sites running on this box. 2 of our sites need to talk back and forth over a restful api. Unfortunately we are having issues with the sited connection to each other via wget. When we try and run wget manually from the command line from the server pointing to a site also on that server it hangs and eventually times out. If we do the same thing from outside the server to the same site on the server it works. Is there something that could be preventing sites on the same server from communicating with each other? The same thing happens pinging the site from the server.

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  • Whats a good secure Windows FTP server?

    - by Keith Nicholas
    Whats a good FTP server? I have been running FileZilla, which seems okish. But I've noticed that a lot of people try to hack ftp servers and FileZilla only has very basic controls to prevent people from hacking. (so far no ones actually managed to get in... so thats good!) I was wondering if there were better options out there? Especially interested in recommendations from people who know they get targeted by hackers.

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  • Any good resources on setting up an ubuntu virtual machine for web development?

    - by Relequestual
    I'm currently on my placement year at uni with 4 months left. Before working at my current place, I have not used a nix environment for web development and have used WAMP. Over the past year I have found some very interesting new tech that requires a bit more than my shared hosting even to play with (eg node.js, RoR 3). At work we use a Virtual Machine for development, but that's all been set up and configured to match the live servers, and is managed with a Puppet server. Are there any really good resources for setting up and configuring an Ubuntu VM as a web server? Work currently uses Ubuntu so I would assume this is a good OS to use. I do of course know how to use google, but the noise ratio is just too big, so thought I'd ask here, as I know many of you will have a ton of bookmarks. Cheers.

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  • Manage Dell workstations with OpenManage Essentials (OME)

    - by Jonathan Rioux
    How can I manage Dell workstations with OpenManage Essentials ? First, is it possible? Because iv read that only Dell servers can be managed with OME. I would like to inventory each Dell workstations I have in my environment, and be able to see their service tag with warranty expiration, etc. Or which product must I use to do this? There are so much Dell management products like OMCI, OMCC, ITA, etc!! I am so lost with all these products.

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  • Does setting an A record for a root domain set it (automatically) for subdomains?

    - by Edan Maor
    I bought a domain from Dreamhost, but my servers are actually running on Amazon's AWS. I have an Elastic IP, say 1.1.1.1. In the Dreamhost panel, I've added an A record for my domain name, pointing it to 1.1.1.1. My question is, are all subdomains (e.g. www.mydomain.com, a.mydomain.com, etc.) automatically mapped to 1.1.1.1 as well, because the root is? Or do I have to add separate rules for each subdomain?

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  • Connecting to my SMTP server

    - by Joseph Silvashy
    I have a few questions, I just installed SMTP on my Ubuntu server, and I want to know how to connect to it from a different machine... I'm not really clear. I tried: telnet my.servers.ip.address 25 I think it's running on port 25, but I don't know where to find out, its not in the conf file anywhere. Additionally do I need it to be a FDQN? or can I just access my mail server via it's IP address? I know that the service works on the machine because I'm able to echo test | mail -s "test" [email protected] Any help debugging or understanding this would be helpful, thanks guys!

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  • How can I measure TCP timeout limit on NAT firewall for setting keepalive interval?

    - by jmanning2k
    A new (NAT) firewall appliance was recently installed at $WORK. Since then, I'm getting many network timeouts and interruptions, especially for operations which would require the server to think for a bit without a response (svn update, rsync, etc.). Inbound SSH sessions over VPN also timeout frequently. That clearly suggests I need to adjust the TCP (and ssh) keepalive time on the servers in question in order to reduce these errors. But what is the appropriate value I should use? Assuming I have machines on both sides of the firewall between which I can make a connection, is there a way to measure what the time limit on TCP connections might be for this firewall? In theory, I would send a packet with gradually increasing intervals until the connection is lost. Any tools that might help (free or open source would be best, but I'm open to other suggestions)? The appliance is not under my control, so I can't just get the value, though I am attempting to ask what it currently is and if I can get it increased.

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  • migrating storage to a different controller

    - by bellocarico
    Hello, I've just purcheased a couple of adaptec controller (2405/5405) for my ESXi 4.0 U1 servers. Currently ESXi and a couple of VMs are hosted on single sata boot disk connected to a nvidia on board non-RAID controller. I know that it's possible to migrate from single disk to RAID 1 with adaptec and I'm pleased with that, but I'm not sure if ESXi has already the right drivers installed/loaded for this controller. Is there any way I can check this? Is ESXi clever enough to recognize the new hardware and load the right module? Thanks

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  • get a list of running ec2 instances programmatically

    - by user113981
    Hi i have started with aws and found out that we can get a list of running servers with the aws php sdk. Is there any other way to get the list of all ec2 instances? after getting the list i want to sync the data from one main instances to all the instances. Something like a button click can also do the operation. Are rsync, incron the only options, or it can be done by aws php sdk also. Please provide some tutorial links.

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