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  • Problems migrating an EBS backed instance over AWS Regions

    - by gshankar
    Note: I asked this question on the EC2 forums too but haven't received any love there. Hopefully the ServerFault community will be more awesome. The new AWS Sydney region opening up is something that we've been waiting for for a long time but I'm having a lot of trouble migrating our instances over from N. California. I managed to migrate 1 instance over using CloudyScripts to move a snapshot and then firing up a new instance in the Sydney region. This was a very new instance so both the source and destination were running on a Ubuntu 12.04 LTS server and I had no issues there. However, the rest of our instances are all Ubuntu 10.04 LTS and with these, I'm having a lot of problems. I've tried following: 1- following the AWS whitepaper on moving instances which was given to us at the recent Customer Appreciation Day in Sydney where the new region was launched. The problem with this approach was with the last step (Step 19) here you register the image: ec2-register -s snap-0f62ec3f -n "Wombat" -d "migrated Wombat" --region ap-southeast-2 -a x86_64 --kernel aki-937e2ed6 --block-device-mapping "/dev/sdk=ephemeral0" I keep getting this error: Client.InvalidAMIID.NotFound: The AMI ID 'ami-937e2ed6' does not exist which I think is due to the kernel_id not existing in the Sydney region? 2- Using CloudyScripts to move a snapshot and then creating a new volume and attaching to a new instance in Sydney This results in the instance just hanging on boot and failing the status checks. I can't SSH in or look at the server log I suspect that my issue is with finding the right kernel_id for the volume in the new region. However I can't seem to work out how to go about finding this kernel_id, the ones I've tried (from the original instance) don't result in the Client.InvalidAMIID.NotFound: The AMI ID 'ami-937e2ed6' error and any other kernel_id just won't boot. I've tried both 12.04 and 10.04 versions of Ubuntu. Nothing seems to work, I've been banging my head against a wall for a while now, please help! New (broken) instance i-a1acda9b ami-9b8611a1 aki-31990e0b Source instance i-08a6664e ami-b37e2ef6 aki-937e2ed6 p.s. I also tried following this guide on updating my Ubuntu LTS version to 12.04 before doing the migration but it didn't seem to work either, still getting stuck on updating the kernel_id http://ubuntu-smoser.blogspot.com.au/2010/04/upgrading-ebs-instance.html

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  • Letters seem to be rendered wrongly in Firefox

    - by BloodPhilia
    So, when I'm browsing in firefox, some letters look grainy or glowing, does anyone know what might be causing this? It doesn't show on all website, only some. It almost looks like Firefox is trying to render different font colours on top of eachother and blends them in the process somehow. Using Firefox 3.6.13 on Windows 7 Ultimate 64 bits and the problems also arrise when running Firefox in safe mode. http://facelift.mawhorter.net/ (top menu) IE 8: FF 3: https://student.ru.nl/portal/dt (center notification) IE 8: FF 3:

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  • How to interrupt software raid resync?

    - by Adam5
    I want to interrupt a running resync operation on an ubuntu 10.04 software raid. (This is the regular scheduled compare resync) How to stop it while it is running? Another raid array is "resync pending", I want a complete stop of all resyncing. [Edit: "sudo kill -9 1010" doesn't do anything, 1010 is the PID of the md2_resync process] I would also like to know how I can control the intervals between resyncs and the remainig time till the next one.

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  • what can cause a folder to become indestructible?

    - by JustJeff
    I have a directory that I want to delete, but windows (xp sp3) is giving me the run-around and the folder is now effectively indestructible. Attempts to open the folder, either via explorer or cmd.exe are met with 'd:/temp/foo Is Not Accessible. Access is denied'. Attempts to delete the folder result in 'Cannot delete foo: The directory is not empty' So I can't delete it because supposedly it's not empty, but windows won't let me in it for some reason, so I can't clean it out first. There's nothing in it of consequence, and basically I just want to delete it at this point. Thinking that some other process must have a lock on it, I used the SysInternals 'handles' and Process Explorer to look for open handles with the directory name. These turned up no matches. (The directory name is not actually 'foo', it is something more unique but 'foo' is easier to type here). I put the machine through a restart, and the problem persists. I did a search for the folder name with regedit, to see what other apps might be aware of it. No match. The properties dialog was mildly interesting. The Read-Only attribute is 'semi-checked', i.e., the grayish check mark you get when some parts are and some parts aren't. Naturally I immediately unchecked this, and tried to delete the folder. No go. Opening properties again reveals the gray check mark next to Read-Only has returned. All the stats, size, size on disk, files, folders, all these are zero. There do not appear to be any shares on the folder, so that's not it either. Finally, I tried opening the partition's properties, and running the Tools/Error Checking utility. This didn't turn up any problems either. Fwiw, this directory was created by [a popular gui zip tool] when I tried to unpack a tar-and-zipped archive created on another system with command line utils. The archive was definitely corrupt, but I've never seen such a file do anything worse than crash the zip app, and certainly never leave permanent glitches in the file system. So what else can possibly be going on to make this folder behave this way?

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  • Intermittently, IIS7 requests get stuck in WindowsAuthenticationModule

    - by Richard Beier
    We're running an IIS7 server hosting several dozen websites. Several of these websites are all part of the same legacy app we've developed. These sites all run the same code and run in the same app pool. Roughly once a month over the past few months, we've found that all requests for this app pool start hanging indefinitely. When this happens, we receive an alert and we recycle the app pool. After that, the sites start working again. This only ever affects this one app pool - never any others on the same server. A couple times, before recycling the pool, I've looked at the currently-executing requests in the worker process. They all show up as executing inside the WindowsAuthenticationModule. Which is strange, because the vast majority of the application does not require authentication. There is a small admin section which uses Windows auth... but all the other requests should be anonymous. Does anyone have any idea as to what might be causing this? There are several unusual things about the way these sites are set up. As I mentioned, they all run the same code - multiple sites point at the same physical directory. The only difference is the host header bindings. I'm not sure why there isn't just one site with all the host headers, but that's how it works. In several of these sites, the same physical directory is mapped at two levels - as the root of the site and again as an application within the site. So if a user goes to http://oursite.com/index.aspx, that maps to c:\files\oursite\index.aspx. If a user goes to http://oursite.com/foo/index.aspx, that also maps to c:\files\oursite\index.aspx. I think there is code which looks at the request URL and handles the two requests differently. This is strange because the same web.config ends up being interpreted as a site config file, and also as an application config file within the site. I don't know if this might be related to the authentication problem. If we can't find the cause, we're thinking of a few workarounds we could try: Move the admin section into a separate site, and give the client a new admin URL. Run that separate site in its own app pool. Then in the web.config shared by all the other sites, remove the WindowsAuthenticationModule. That way there should be no possibility of a hang within the WindowsAuthenticationModule. Try running all these sites in the classic pipeline instead of the integrated pipeline. They were working fine on our old IIS6 server... (If we get desperate) Set up a watchdog script which monitors the sites and auto-recycles the app pool when it detects that requests are getting stuck. What do you think? Thanks for your help, Richard

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  • Specifying prerequisites for Puppet custom facts?

    - by larsks
    I have written a custom Puppet fact that requires the biosdevname tool to be installed. I'm not sure how to set things up correctly such that this tool will be installed before facter tries to instantiate the custom fact. Facts are loaded early on in the process, so I can't simply put a package { biosdevname: ensure => installed } in the manifest, since by the time Puppet gets this far the custom fact has already failed. I was curious if I could resolve this through Puppet's run stages. I tried: stage { pre: before => Stage[main] } class { biosdevname: stage => pre } And: class biosdevname { package { biosdevname: ensure => installed } } But this doesn't work...Puppet loads facts before entering the pre stage: info: Loading facts in physical_network_config ./physical_network_config.rb:33: command not found: biosdevname -i eth0 info: Applying configuration version '1320248045' notice: /Stage[pre]/Biosdevname/Package[biosdevname]/ensure: created Etc. Is there any way to make this work? EDIT: I should make it clear that I understand, given a suitable package declaration, that the fact will run correctly on subsequent runs. The difficulty here is that this is part of our initial configuration process. We're running Puppet out of kickstart and want the network configuration to be in place before the first reboot. It sounds like the only workable solution is to simply run Puppet twice during the initial system configuration, which will ensure that the necessary packages are in place. Also, for Zoredache: # This produces a fact called physical_network_config that describes # the number of NICs available on the motherboard, on PCI bus 1, and on # PCI bus 2. The fact value is of the form <x>-<y>-<z>, where <x> # is the number of embedded interfaces, <y> is the number of interfaces # on PCI bus 1, and <z> is the number of interfaces on PCI bus 2. em = 0 pci1 = 0 pci2 = 0 Dir['/sys/class/net/*'].each { |file| devname=File.basename(file) biosname=%x[biosdevname -i #{devname}] case when biosname.match('^pci1') pci1 += 1 when biosname.match('^pci2') pci2 += 1 when biosname.match('^em[0-9]') em += 1 end } Facter.add(:physical_network_config) do setcode do "#{em}-#{pci1}-#{pci2}" end end

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  • How would you simplify this command?

    - by Andrei Serdeliuc
    I'm quite new to strace / netstat / etc. I'm using this command to get a trace of the apache process handling my request (telnet), is there a way to simplify it a bit? sudo strace -o /tmp/strace -f -s4096 -r -p $(netstat -antlp | \ grep $(lsof -p `pidof telnet` | grep TCP | \ perl -n -e'/localhost:(\d+)/ && print $1') | grep apache2 | \ perl -n -e'/ESTABLISHED (\d+)/ && print $1') Thanks!

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  • fcgid, suexec, and userdir

    - by Martin v. Löwis
    I'm trying to set up per-user trac instances, using fcgid. The problem is that trac requires rw access to the trac instance, so I need the fcgi process to run under the respective user. I have the suexec, fcgid, and userdir Apache modules installed (on Debian). I put up vhost directive ScriptAliasMatch /~(.*)/trac /home/$1/public_html/trac.fcgi This works insofar as trac.fcgi is run, but unfortunately, under the www-data user. How can I make fcgid launch it under the $1 user?

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  • progress bar for Hibernation in Windows Seven

    - by Toc
    On XP, during hibernation a progress bar showd me how long I have to wait for completing the operation. On Seven, I see no progress bar and the monitor turn off at once while the OS saves the ram on the disk. Same thing during the wake up process after the hibernation. Is it possible to have the progress bar for hibernation and following wake up on Seven?

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  • Best format for backing up data in Blu Ray

    - by Arrieta
    We are in the process of backing up our hard drives to Blu Rays. I am creating tar.gz files and burning them to Blu Ray. Is it possible to use a simple (preferably Python-based) solution for creating images of those tar.gz files, of a predetermined size (to fit in the Blu Ray), and simply burn this images to the disc? Do you have any other approach for creating physical back-up of your hard drives?

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  • Monit network availability checking

    - by viraptor
    Hi, I'd like to start a service with monit but only when I have the correct ip bound to the host. Can this be done somehow with the normal config? For example I want to start a process xxx with pidfile xxx.pid, but only if host currently has 10.0.0.1 bound to some interface.

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  • Can't boot Windows 8

    - by Viet Norm
    When I try to boot Windows 8, it starts automatic repair process which fails to repair it. It logs stuff in c:\windows\system32\Logfiles\Srt\SrtTrail.txt. After one of attempted automatic repairs, last line in that file said that tm.sys and clfs.sys files are corrupt (current version says "Startup Repair has tried several times but still cannot determine the cause of the problem.") Any ideas how to fix this? Thanks in advance.

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  • Arrow keys don't work in htop on OS X in Terminal

    - by Daniel Huckstep
    Not sure when it happened, or what I did (if anything), but my arrow keys don't work in htop anymore to scroll around. You should be able to press up and down to scroll up and down the process list, but they don't work. Some keys tend to be the equivalent of 'go back' or something. If I'm on the settings screen, left, up and down all go back to the main screen. htop seems to be the only affected program.

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  • Writing an upstart file which allows the user to input username and password

    - by Robert Munteanu
    I'm trying to write an upstart file for OpenConnect. The task is pretty simple, but I'm stuck because I don't want to provide the username and password in a config file, but prompt the user to provide them each time. The upstart file, placed in /etc/init/openconnect.conf is exec /usr/sbin/openconnect --script=/etc/vpnc/vpnc-script my-gw.example.com However, when I execute start openconnect the process is backgrounded immediately and I get no chance to provide input. How can I make this upstart job ask the user for input?

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  • nginx 502 bad gateway - fastcgi not listening? (Debian 5)

    - by Sean
    I have experience with nginx but it's always been pre-installed for me (via VPS.net pre-configured image). I really like what it does for me, and now I'm trying to install it on my own server with apt-get. This is a fairly fresh Debian 5 install. I have few extra packages installed but they're all .deb's, no manual compiling or anything crazy going on. Apache is already installed but I disabled it. I did apt-get install nginx and that worked fine. Changed the config around a bit for my needs, although the same problem I'm about to describe happens even with the default config. It took me a while to figure out that the default debian package for nginx doesn't spawn fastcgi processes automatically. That's pretty lame, but I figured out how to do that with this script, which I found posted on many different web sites: #!/bin/bash ## ABSOLUTE path to the PHP binary PHPFCGI="/usr/bin/php5-cgi" ## tcp-port to bind on FCGIPORT="9000" ## IP to bind on FCGIADDR="127.0.0.1" ## number of PHP children to spawn PHP_FCGI_CHILDREN=10 ## number of request before php-process will be restarted PHP_FCGI_MAX_REQUESTS=1000 # allowed environment variables sperated by spaces ALLOWED_ENV="ORACLE_HOME PATH USER" ## if this script is run as root switch to the following user USERID=www-data ################## no config below this line if test x$PHP_FCGI_CHILDREN = x; then PHP_FCGI_CHILDREN=5 fi ALLOWED_ENV="$ALLOWED_ENV PHP_FCGI_CHILDREN" ALLOWED_ENV="$ALLOWED_ENV PHP_FCGI_MAX_REQUESTS" ALLOWED_ENV="$ALLOWED_ENV FCGI_WEB_SERVER_ADDRS" if test x$UID = x0; then EX="/bin/su -m -c \"$PHPFCGI -q -b $FCGIADDR:$FCGIPORT\" $USERID" else EX="$PHPFCGI -b $FCGIADDR:$FCGIPORT" fi echo $EX # copy the allowed environment variables E= for i in $ALLOWED_ENV; do E="$E $i=${!i}" done # clean environment and set up a new one nohup env - $E sh -c "$EX" &> /dev/null & When I do a "ps -A | grep php5-cgi", I see the 10 processes running, that should be ready to listen. But when I try to view a web page via nginx, I just get a 502 bad gateway error. After futzing around a bit, I tried telneting to 127.0.0.1 9000 (fastcgi is listening on port 9000, and nginx is configured to talk to that port), but it just immediately closes the connection. This makes me think the problem is with fastcgi, but I'm not sure what I can do to test it. It may just be closing the connection because it's not getting fed any data to process, but it closes immediately so that makes me think otherwise. So... any advice? I can't figure it out. It doesn't help that it's 1AM, but I'm going crazy here!

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  • How to interpret Rackspace server diagnostics?

    - by Ben
    We've been having some trouble lately with our site timing out during times of high traffic. We're working on a number of things to resolve it. During this process I came across our server diagnostics page on Rackspace, and it has the following line: The host server's load is: 0.08 0.08 0.03 1/204 2437 I couldn't find an explanation on their site or Google. Can anyone explain what these numbers mean? For I am a lowly programmer. Much appreciated, -Ben

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  • How do I identify resource hogs on Firefox?

    - by Tarrasch
    I have installed a package of Firefox extensions that installed a few extensions to my Firefox. Recently I have noticed, that the resource consumption of the Firefox process rose to unacceptable levels for my rather weak Laptop. How can I identify the add-ons responsible for this? I do not want to uninstall all the add-ons since I think some of them really make my life easier. Is there a way to profile my Firefox plugins, preferably over a period of time?

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  • How can I pre-sign puppet certificates?

    - by Ranguard
    Puppet requires certificates between the client (puppet) being managed and the server (puppetmaster). You can run manually on the client and then go onto the server to sign the certificate, but how do you automate this process for clusters / cloud machines?

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  • Mercurial simultaneous access

    - by mizipzor
    We have a mercurial repository (the stable branch) on a mapped network drive (windows). I want to know what happens if more than one user attempts to push at the same time. Or if someone pulls while another is halfway through a push. Is the mercurial client notified by the OS that the file is in use by another process and bails? Is there a risk that I could corrupt the repository with this setup?

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  • How to automate photoshop from the command line.

    - by Raymond
    I have a tool which writes some tags to a photo. On some photos it fails, and for those I want to open them in photoshop, and resave it with maximum quality (jpeg). Ideally I would like to do that from the command line as then I can just do: for %a in (*.jpg) do mytool.exe "%a" || [AUTOMATED PROCESS HERE] I tried first just doing photoshop.exe "%a" but it seems photoshop doesn't even accept a command line argument for what photo to open.

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