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  • HAProxy "503 Service Unavailable" for webserver running on a KVM virtual machine

    - by Menda
    I'm setting up a server with KVM (IP 192.168.0.100) and I have created inside of it one virtual machine using network bridging at 192.168.0.194. This virtual machine has an nginx instance running, which I can access from the server or from any computer computer in the internal network just typing in the browser http://192.168.0.194. However, I try configure HAProxy in the same server that hosts KVM and looking the status page of HAProxy it always shows the virtual machine as "DOWN". If I try from the server http://localhost, it should be the same than if I go to http://192.168.0.194. My goal is to build a reverse proxy, but I tried this little example and won't work. What am I doing bad? This is my config file in the server: # /etc/haproxy/haproxy.cfg global maxconn 4096 user haproxy group haproxy daemon defaults log global mode http option httplog option dontlognull retries 3 option redispatch maxconn 2000 contimeout 5000 clitimeout 50000 srvtimeout 50000 listen ServerStatus *:8081 mode http stats enable stats auth haproxy:haproxy listen Server *:80 mode http balance roundrobin cookie JSESSIONID prefix option httpclose option forwardfor option httpchk HEAD /check.txt HTTP/1.0 server mv1 192.168.0.194:80 cookie A check Thanks.

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  • SCCM 2012 Clients no longer detecting

    - by user3685428
    Here is the scenario I had a fully functioning SCCM 2012 site server with the DP, MP, SUP, Application catalog, etc. roles configured and working. There is only one server on this site. Everything was great but i was not happy with SUP, so i decided to create a separate WSUS server and configure Windows Updates through GPOs. That setup worked great as well so i went ahead and removed the SUP role from SCCM and removed the WSUS feature from my SCCM server (they were configured on the same SCCM Server). I did not notice any problems right away. A couple days later i noticed that the OSD deployments were giving errors, and after a couple hours of trying suggestions from Google, i was able to uninstall PXE and make a few changes and reinstall with WDS to get it working again. Again, thought everything was fine and continued on. The last couple days i have noticed that any new machine deployed or installing the Client will show in the SCCM console as "No" Client. The client machines will show connected to a site but the software center shows "IT Organization" instead of our site like the previous clients. The existing clients all seem to be functioning normally. they still receive application distributions and configuration baselines, etc. Reinstalling, uninstalling and reinstalling, repairing does not fix the problems and this happens on all new clients. ClientLocation.log shows it connecting to the correct MP. Nothing odd in any of the logs except for the ClientMessaging.log which repeats continuously this line: <![LOG[Raising event: instance of CCM_CcmHttp_Status { ClientID = "GUID:0450fde3-ab82-41bf-9c33-87a18113744b"; DateTime = "20140528214824.993000+000"; HostName = "SOUNDWAVE.domain.org"; HRESULT = "0x00000000"; ProcessID = 4092; StatusCode = 0; ThreadID = 3720; }; ]LOG]!><time="16:48:24.994+300" date="05-28-2014" component="CcmMessaging" context="" type="1" thread="3720" file="event.cpp:706"> thanks

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  • Open Source Chef Server can't upload cookbook

    - by veilig
    I just setup the open source chef server on an Ubuntu 12.04 EC2 instance, I've setup my webui and am able to get responses from my knife commands ie: knife node list, knife client list, knife user list, etc... I'm able to update roles, databags, environments, etc... but I cannot upload any cookbooks. I'm running my workstation on Mac OSX. I keep getting this output at the end of my command knife cookbook upload -VV curl. Doesn't matter what cookbook I upload, or if I upload them all - I keep getting the same response DEBUG: Chef::HTTP calling Chef::HTTP::ValidateContentLength#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::RemoteRequestID#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::Authenticator#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::Decompressor#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::CookieManager#handle_response DEBUG: Chef::HTTP calling Chef::HTTP::JSONToModelOutput#handle_response /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http/json_output.rb:51:in `handle_response': undefined method `chomp' for nil:NilClass (NoMethodError) from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:229:in `block in apply_response_middleware' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:227:in `each' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:227:in `inject' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:227:in `apply_response_middleware' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:144:in `request' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/http.rb:118:in `put' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/cookbook_uploader.rb:123:in `block in uploader_function_for' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/util/threaded_job_queue.rb:52:in `call' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/util/threaded_job_queue.rb:52:in `block (3 levels) in process' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/util/threaded_job_queue.rb:50:in `loop' from /usr/local/lib/ruby/gems/2.1.0/gems/chef-12.0.0.alpha.1/lib/chef/util/threaded_job_queue.rb:50:in `block (2 levels) in process'INFO: HTTP Request Returned 204 No Content:

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  • Representing server state with a metric

    - by Sal
    I'm using Microsoft's Performance Monitor to dump logs of RAM, CPU, network, and disk usage from multiple servers. I'd like to get a single metric that captures the state of a given variable to a good extent. For instance, disk usage is pretty stable, so if I take a single reading that says I have 50% remaining disk space, that reading will give me an accurate measure for the day. (The servers aren't doing heavy IO writing.) However, the tricky part here is monitoring CPU and network usage. The logs currently dump the % CPU usage every ten seconds. If I take a straight average of the numbers, it may not represent reality, as % CPU will be much lower during the night than day. (We host websites that sell appliance items.) I'd like to get an average over a span during peak hours (about 5 hours in the day) and present a daily peak hour metric. Of course, there are most likely some readings that will come in as overly spiked (if multiple users pinged the server at once) or no use (a momentary idle state). Is there a standard distribution/test industries use in these situation?

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  • Millions of files in php's tmp error - how to delete?

    - by Jonatan Littke
    Hey. I've got a tmp-folder with 14 million php session files in my home directory. At least that's what I think it is, it's not like I could ls it or anything. How can I empty this folder? I've tried using find with the -exec rm {} \; commands but that didn't work. ls 'sess_0*' | xargs rm did neither. I'm currently running rm -rf tmp but after two hours the folder appears to be the same size. REFERENCE INFO: I suddenly encountered an error where SESSIONS could no longer be written to disk: [Mon Apr 19 19:58:32 2010] [warn] mod_fcgid: stderr: PHP Warning: Unknown: open(/var/www/clients/client1/web1/tmp/sess_8e12742b62aa68a3f9476ec80222bbfb, O_RDWR) failed: No space left on device (28) in Unknown on line 0 [Mon Apr 19 19:58:32 2010] [warn] mod_fcgid: stderr: PHP Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/www/clients/client1/web1/tmp) in Unknown on line 0 I ran: $ df -h Filesystem Size Used Avail Use% Mounted on /dev/md0 457G 126G 308G 29% / tmpfs 1.8G 0 1.8G 0% /lib/init/rw udev 10M 664K 9.4M 7% /dev tmpfs 1.8G 0 1.8G 0% /dev/shm But as you can see, the disk isn't full. So I had a look in the syslog which says the following 20 times per second: kernel: [19570794.361241] EXT3-fs warning (device md0): ext3_dx_add_entry: Directory index full! This led me thinking to a full folder, obviously, but since my web folder only has 60k files (having counted them), I guessed it was the tmp folder (the local one, for this instance of php) that messed things up. Some commands I ran: $ sudo ls sess_a* | xargs rm -f bash: /usr/bin/sudo: Argument list too long find . -exec rm {} \; rm: cannot remove directory '.' find: cannot fork: Cannot allocate memory I'm running Debian Lenny, php5, ISPConfig, SuEXEC and Fast-CGI.

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  • Installing Ruby 1.9.3 OSX 10.7.4 breaks after altering PATH

    - by R V
    I was having trouble installing ruby 1.9.3-p194 from ruby 1.8.7 on my mac osx 10.7.4. I have was trying to fix my homebrew after running "brew doctor" and got the message of "/usr/bin occurs before /usr/local/bin This means that system-provided programs will be used instead of those provided by Homebrew. The following tools exist at both paths: c++-4.2 cpp-4.2 erb g++-4.2 gcc-4.2 gcov-4.2 gem i686-apple-darwin11-cpp-4.2.1 i686-apple-darwin11-g++-4.2.1 i686-apple-darwin11-gcc-4.2.1 irb rake rdoc ri ruby testrb" I fixed it by entering the following, which I found on another stackoverflow answer: export PATH="/usr/local/bin:/usr/local/sbin:~/bin$PATH" Lo and behold! when I typed that ruby updates to 1.9.3-p194. Ruby files seem to compile and run just fine. However, afterward, my navigation around terminal is messed up severely. For instance I can't do the command "open example_file.html" and have the file pop up in Chrome, instead I get the error: "-bash: open: command not found" Also, when I change directory, I get an error, inputting "$ cd desktop" yields the output, "-bash: dirname: command not found" but the directory does then changes... strange. When I exit out of a terminal window all this resets. I'm back to Ruby 1.8.7, have to use the PATH command again to update to 1.9.3, command line navigation gets broken again. Any guidance on how to remedy so I can use 1.9.3-p194 and also have normal terminal navigation would be greatly appreciated.

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  • Appears to be "randomly" switching between the acl matched backend and the default backend

    - by Xoor
    I have HAProxy acting as a proxy in front of: An NGinx instance An in-house load balancer in front of multiple dynamic services exposed with socket.io (websockets) My problem is that from time to time my connections are proxied correctly to my socket.io cluster, and then randomly it fallsback to routing to NGinx which obviously is annoying and meaningless since NGinx isn't mean't to handle the request. This happens when requesting for URLs of the format : http://mydomain.com/backends/* There's an ACL in the HAProxy config to match the '/backends/*' path. Here's a simplified version of my HAProxy config (removed extra unrelated entries and changed names): global daemon maxconn 4096 user haproxy group haproxy nbproc 4 defaults mode http timeout server 86400000 timeout connect 5000 log global #this frontend interface receives the incoming http requests frontend http-in mode http #process all requests made on port 80 bind *:80 #set a large timeout for websockets timeout client 86400000 # Default Backend default_backend www_backend # Loadfire (socket cluster) acl is_loadfire_backends path_beg /backends use_backend loadfire_backend if is_loadfire_backends # NGinx backend backend www_backend server www_nginx localhost:12346 maxconn 1024 # Loadfire backend backend loadfire_backend option forwardfor # This sets X-Forwarded-For option httpclose server loadfire localhost:7101 maxconn 2048 It's really quite confusing for me why the behaviour appears to be "random", since being hard to reproduce it's hard to debug. I appreciate any insight on this.

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  • File in use when it's really not

    - by C-dizzle
    I am running Windows 7 Professional 32 bit on a Server 2008 network. I am getting a weird issue with an excel document where I open it up one morning, update it, save and close, the next morning I come in, open it up and it says "This file is in use and locked by csmith" which "csmith" is me! So I click on the cancel button, open it up again and it comes up fine. I can edit, save and close with no problem. But then have the same issue the next morning. Another weird thing is that we have a calendar shared in "Public Folders" under Outlook that seems to be having the same issue, which happens to be a calendar made in Excel. Exchange 2010 is installed on the server and the clients are using Exchange 2007. In the instance with the calendar, it will show conflicting edits have been made and you must keep one item or all items. And it shows an edit date of 4/24/2012 and 6/1/2012. But, there were NO edits done on 6/1, just tried opening it. This problem does not occur under my profile, but 2 others. These machines are ALSO running Windows 7 Professional 32 bit. We have a mix of Windows 7 and Windows XP machines on our network if that is any help. These issues did not start happening until we migrated from a server running Server 2003 and Exchange 2000, which the new server is running Server 2008 and Exchange 2010 as stated above. Is there something on the server side that is configured wrong?

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  • IPSec Tunnel to Amazon EC2 - Netkey, NAT, and routing problem

    - by Ernest Mueller
    Hey all, I'm working on getting an IPSec VPN working between Amazon EC2 and my on-premise. The goal is to be able to safely administer stuff, up/download data, etc. over that tunnel. I have gotten the tunnel up in openswan between a Fedora 12 instance with an elastic IP and a Cisco router that's also NATted. I think the ipsec part is OK, but I'm having trouble figuring out how to route traffic that way; there's no "ipsec0" virutal interface because on Amazon you have to use netkey and not KLIPS for the vpn. I hear iptables may be required and I'm an iptables noob. On the left (Amazon), I have a 10. network. Box 1 is privately 10.254.110.A, publically IP 184.73.168.B. Netkey tunnel is up. Box 2 is publically 130.164.26.C, privately 130.164.0.D And my .conf is: conn ni type= tunnel authby= secret left= 10.254.110.A leftid= 184.73.168.B leftnexthop= %defaultroute leftsubnet= 10.254.0.0/32 right= 130.164.26.C rightid= 130.164.0.D rightnexthop= %defaultroute rightsubnet= 130.164.0.0/18 keyexchange= ike pfs= no auto= start keyingtries= 3 disablearrivalcheck=no ikelifetime= 240m auth= esp compress= no keylife= 60m forceencaps= yes esp= 3des-md5 I added a route to box 1 (130.164.0.0/18 via 10.254.110.A dev eth0) but that doesn't do it for predictable reasons, when I traceroute the traffic's still going "around" and not through the vpn. Routing table: 10.254.110.0/23 dev eth0 proto kernel scope link src 10.254.110.A 130.164.0.0/18 via 10.254.110.178 dev eth0 src 10.254.110.A 169.254.0.0/16 dev eth0 scope link metric 1002 Anyone know how to do the routing with a netkey ipsec tunnel where both sides are NATted? Thanks...

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  • How to bypass vpn talking to VMWare Guest?

    - by marc esher
    Greetings. Network/VPN n00b question here. I'm running VMWare Workstation with a Guest Windows 2003 Server. It has SQL Server 2000 installed. The sole purpose for this Guest is to house SQL Server... it needn't have internet access or access to any other resources on the network other than the host. When launch Check Point VPN software, the host routes through the company network before it connects to the guest ... i.e. it's no longer a direct connection. I assume this is just how things are supposed to work. However, what's happening is that the connection between my host and the SQL Server instance on the guest intermittently drops. It's not consistent, and some databases on the server will be responsive while others aren't. It appears that the databases with the most traffic on the guest (the ones I'm hitting with load tests) are the ones that become intermittently unresponsive. This problem only manifests when VPN is on; when it's off, I can pound away on this database with no troubles. Thanks for any advice!

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  • Serving and caching content from Amazon S3 with Tomcat

    - by Rob
    Hi all, We're looking to serve a range of content using Amazon S3 as a store for the content and Tomcat to host the web application. The content is divided into free and paid for content. We intend to authenticate the users when they access the web application running in Tomcat. Based around their authentication we are able to tell if the user has access to paid for content or simply free stuff. So I envision the flow of a request being something like this: Authenticated request to Tomcat If user is "paid" user, display links to premium content Direct requests for paid content back through Tomcat to prevent direct access to it by non-paying users. Tomcat makes request to S3 through a web cache to keep our costs down Content is returned to user. As we have to pay for each request to S3, I'd ideally like to cache content locally to the Tomcat instance after it has been requested for the first time to keep costs to a minimum and to speed things up. I would also like to be able to invalidate this cache if we publish fresh content to S3. So to confirm my proposal: Client Request - Tomcat - Web Cache - S3 To invalidate the cache, I was thinking of using something like PubSubHubbub with the cache waiting for updates to the feed for content that it should invalidate. I'd appreciate some general feedback on this approach as I've no real experience of caching and I'm sure I've made some invalid assumptions. I'd also appreciate any recommendations for caching technologies. Thanks.

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  • Unable to send mail to hotmail from rackspace cloud

    - by Jo Erlang
    I'm having issue sending mail from postfix on a rackspace cloud instance for my domain. Hotmail says "550 SC-001 (SNT0-MC4-F35) Unfortunately, messages from 198.101.x.x weren't sent. Please contact your Internet service provider since part of their network is on our block list. " Here is the mail log Sep 20 08:02:59 mydomain postfix/smtpd[1810]: disconnect from localhost[127.0.0.1] Sep 20 08:02:59 mydomain postfix/smtp[1814]: 59CFF4B191: to=<[email protected]>, relay=mx3.hotmail.com[65.55.92.184]:25, delay=0.19, delays=0.1/0.01/0.06/0.01, dsn=5.0.0, status=bounced (host mx3.hotmail.com[65.55.92.184] said: 550 SC-001 (SNT0-MC4-F35) Unfortunately, messages from 198.101.x.x weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. (in reply to MAIL FROM command)) Sep 20 08:02:59 mydomain postfix/smtp[1814]: 59CFF4B191: lost connection with mx3.hotmail.com[65.55.92.184] while sending RCPT TO I have implemented rDNS, SPF and DKIM they all are looking fine. I have checked my IP and domain, on most of the spam black lists and it is listed as ok on those, (not listed as spamming IP) What should I try next?

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  • Why can't I route to some sites from my MacBook Pro that I can see from my iPad? [closed]

    - by Robert Atkins
    I am on M1 Cable (residential) broadband in Singapore. I have an intermittent problem routing to some sites from my MacBook Pro—often Google-related sites (arduino.googlecode.com and ajax.googleapis.com right now, but sometimes even gmail.com.) This prevents StackExchange chat from working, for instance. Funny thing is, my iPad can route to those sites and they're on the same wireless network! I can ping the sites, but not traceroute to them which I find odd. That I can get through via the iPad implies the problem is with the MBP. In any case, calling M1 support is... not helpful. I get the same behaviour when I bypass the Airport Express entirely and plug the MBP directly into the cable modem. Can anybody explain a) how this is even possible and b) how to fix it? mella:~ ratkins$ ping ajax.googleapis.com PING googleapis.l.google.com (209.85.132.95): 56 data bytes 64 bytes from 209.85.132.95: icmp_seq=0 ttl=50 time=11.488 ms 64 bytes from 209.85.132.95: icmp_seq=1 ttl=53 time=13.012 ms 64 bytes from 209.85.132.95: icmp_seq=2 ttl=53 time=13.048 ms ^C --- googleapis.l.google.com ping statistics --- 3 packets transmitted, 3 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 11.488/12.516/13.048/0.727 ms mella:~ ratkins$ traceroute ajax.googleapis.com traceroute to googleapis.l.google.com (209.85.132.95), 64 hops max, 52 byte packets traceroute: sendto: No route to host 1 traceroute: wrote googleapis.l.google.com 52 chars, ret=-1 *traceroute: sendto: No route to host traceroute: wrote googleapis.l.google.com 52 chars, ret=-1 ^C mella:~ ratkins$ The traceroute from the iPad goes (and I'm copying this by hand): 10.0.1.1 119.56.34.1 172.20.8.222 172.31.253.11 202.65.245.1 202.65.245.142 209.85.243.156 72.14.233.145 209.85.132.82 From the MBP, I can't traceroute to any of the IPs from 172.20.8.222 onwards. [For extra flavour, not being able to access the above appears to stop me logging in to Server Fault via OpenID and formatting the above traceroutes correctly. Anyone with sufficient rep here to do so, I'd be much obliged.]

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  • System freezes during boot process

    - by slugster
    Hi everyone, i have a machine running Win7 Ultimate. It was running fine, then it just froze - all the stuff i was doing was still on the screen, but mouse and keyboard input was ignored, any animation that was happening on the screen stopped, the machine literally just froze. So i rebooted (power off button), from then on the machine will reboot, but it ultimately freezes again. The instance when this happens will vary - i have made it as far as the Windows login screen, but mostly it will do the POST, then give me the option to press F1 to continue or Del to enter BIOS settings (but of course pressing a key has no effect - it's frozen!). I have disconnected everything not necessary for the boot process, the only peripheral that remains attached is the keyboard. (even the network cable is disconnected). Prior to this the machine was operating fine. The install of Win7 is only 2 days old, and it was a fresh reinstall (i.e. not an upgrade or repair). Can anyone give me an indication of what may be wrong here? I'm not sure if this question should be here or on SuperUser, please migrate it if i have chosen the wrong board.

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  • System freezes during boot process

    - by slugster
    Hi everyone, i have a machine running Win7 Ultimate. It was running fine, then it just froze - all the stuff i was doing was still on the screen, but mouse and keyboard input was ignored, any animation that was happening on the screen stopped, the machine literally just froze. So i rebooted (power off button), from then on the machine will reboot, but it ultimately freezes again. The instance when this happens will vary - i have made it as far as the Windows login screen, but mostly it will do the POST, then give me the option to press F1 to continue or Del to enter BIOS settings (but of course pressing a key has no effect - it's frozen!). I have disconnected everything not necessary for the boot process, the only peripheral that remains attached is the keyboard. (even the network cable is disconnected). Prior to this the machine was operating fine. The install of Win7 is only 2 days old, and it was a fresh reinstall (i.e. not an upgrade or repair). Can anyone give me an indication of what may be wrong here? I'm not sure if this question should be here or on SuperUser, please migrate it if i have chosen the wrong board.

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  • What are some techniques to monitor multiple instances of a piece of software?

    - by Geo Ego
    It was recommended that I ask this question here by a member of StackOverflow. I have a piece of self-serve kiosk software that will be running at multiple sites. I'd like to monitor their status remotely. The kiosk application itself is pretty much finished. I am now in the process of creating a piece of software that will monitor all of the kiosks from a central location so that the customer can view particular details remotely (for instance, how many bills are in the acceptor's cash cartridge, what customer is currently logged in, etc.). Because I am in such an early stage of development, my options are quite open. I understand that I'm not giving very many qualifications, but I'd like to try to get a good variety of potential solutions. Some details: Kiosk software is a VB6 app running on Windows Embedded Monitoring software will be run on a modern desktop version of Windows (either XP, Vista, or 7) Database is SQL Server 2008 My initial idea was to develop a .NET app that would simply report the last database transaction for each kiosk at a set interval (say every second or so) but I'd really like for the kiosk software to report its status in real-time. I'm not exactly sure where to begin in terms of what modifications may need to be made to the kiosk software, and what the monitoring software will require. Links to articles on these topics would be most welcome.

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  • Shared files folder in Amazon Elastic Beanstalk environment

    - by por
    I'm working on a Drupal application, which is planned to be hosted in Amazon Elastic Beanstalk environment. Basically, Elastic Beanstalk enables the application to scale automatically by starting additional web server instances based on predefined rules. The shared database is running on an Amazon RDS instance, which all instances can access properly. The problem is the shared files folder (sites/default/files). We're using git as SCM, and with it we're able to deploy new versions by executing $ git aws.push. In the background Elastic Beanstalk automatically deletes ($ rm -rf) the current codebase from all servers running in the environment, and deploys the new version. The plan was to use S3 (s3fs) for shared files in the staging environment, and NFS in the production environment. We've managed to set up the environment to the extent where the shared files folder is mounted after a reboot properly. But... The Problem is that, in this setup, the deployment of new versions on running instances fail because $ rm -rf can't remove the mounted directory, and as result, the entire environment goes down and we need restart the environment, which isn't really an elegant solution. Question #1 is that what would be the proper way to manage shared files in this kind of deployment? Are you running such an environment? How did you solve the problem? By looking at Elastic Beanstalk Hostmanager code (Ruby) there seems be a way to hook our functionality (unmount if mounted in pre-deploy and mount in post-deploy) into Hostmanager (/opt/hostmanager/srv/lib/elasticbeanstalk/hostmanager/applications/phpapplication.rb) but the scripts defined in the file (i.e. /tmp/php_post_deploy_app.sh) don't seem to be working. That might be because our Ruby skills are non-existent. Question #2 is that did you manage to hook your functionality in Hostmanager in a portable way (i.e. by not changing the core Hostmanager files)?

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  • When I restart my LXC environment, the container does not re-bind to the IP address

    - by RoboTamer
    The IP does no longer respond to a remote ping With restart I mean: lxc-stop -n vm3 lxc-start -n vm3 -f /etc/lxc/vm3.conf -d -- /etc/network/interfaces auto lo iface lo inet loopback up route add -net 127.0.0.0 netmask 255.0.0.0 dev lo down route add -net 127.0.0.0 netmask 255.0.0.0 dev lo # device: eth0 auto eth0 iface eth0 inet manual auto br0 iface br0 inet static address 192.22.189.58 netmask 255.255.255.248 gateway 192.22.189.57 broadcast 192.22.189.63 bridge_ports eth0 bridge_fd 0 bridge_hello 2 bridge_maxage 12 bridge_stp off post-up ip route add 192.22.189.59 dev br0 post-up ip route add 192.22.189.60 dev br0 post-up ip route add 192.22.189.61 dev br0 post-up ip route add 192.22.189.62 dev br0 -- /etc/lxc/vm3.conf lxc.utsname = vm3 lxc.rootfs = /var/lib/lxc/vm3/rootfs lxc.tty = 4 #lxc.pts = 1024 # pseudo tty instance for strict isolation lxc.network.type = veth lxc.network.flags = up lxc.network.link = br0 lxc.network.name = eth0 lxc.network.mtu = 1500 #lxc.cgroup.cpuset.cpus = 0 # security parameter lxc.cgroup.devices.deny = a # Deny all access to devices lxc.cgroup.devices.allow = c 1:3 rwm # dev/null lxc.cgroup.devices.allow = c 1:5 rwm # dev/zero lxc.cgroup.devices.allow = c 5:1 rwm # dev/console lxc.cgroup.devices.allow = c 5:0 rwm # dev/tty lxc.cgroup.devices.allow = c 4:0 rwm # dev/tty0 lxc.cgroup.devices.allow = c 4:1 rwm # dev/tty1 lxc.cgroup.devices.allow = c 4:2 rwm # dev/tty2 lxc.cgroup.devices.allow = c 1:9 rwm # dev/urandon lxc.cgroup.devices.allow = c 1:8 rwm # dev/random lxc.cgroup.devices.allow = c 136:* rwm # dev/pts/* lxc.cgroup.devices.allow = c 5:2 rwm # dev/pts/ptmx lxc.cgroup.devices.allow = c 254:0 rwm # rtc # mounts point lxc.mount.entry=proc /var/lib/lxc/vm3/rootfs/proc proc nodev,noexec,nosuid 0 0 lxc.mount.entry=devpts /var/lib/lxc/vm3/rootfs/dev/pts devpts defaults 0 0 lxc.mount.entry=sysfs /var/lib/lxc/vm3/rootfs/sys sysfs defaults 0 0

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  • Allow opening a new tab with Ctrl+T on all websites in Firefox

    - by Martin J.H.
    In Firefox, certain websites and plugins (Adobe PDF Plugin) appear to "capture" the Control key, so that when I try to open a new tab using "Ctrl+t", nothing happens - or worse, something unexpected happens. Examples: On the Codecademy site, while editing code, Ctrl+T either does nothing, or (when Flash is disabled) switches the position of the two characters next to the cursor. When viewing PDF's with the Adobe PDF Plugin, Ctrl+T does nothing. Is there a way to disable this "feature"? I would like "Ctrl+t" to always "talk" to Firefox! Edit: After searching superuser deeper, this question is very similar to the questions: "How to prevent keystroke grabbing/hijacking by websites in Firefox?" "How do I prevent pages I visit from overriding selected Firefox shortcut keys?". The answers to these questions are interesting and relevant, but do not give a method on how to disable combinatinos such as "Ctrl+t". Maybe a modified Greasemonkey script is the easiest solultion. Edit 2 - Attempt at a solution The following UserScript (Use GreaseMonkey to install it) successfully captures Ctrl+t on some sites (Google Search site, for instance - PopUp "Gotcha" appears), but not on the Codecademy site. I found another question pertaining to this subject here: "How to forbid keyboard shortcut stealing by websites in Firefox". It was raised in 2010, and the consensus was: It can't be done. // ==UserScript== // @name Disable Ctrl T interceptions // @description Stop websites from highjacking keyboard shortcuts // // @run-at document-start // @include * // @grant none // ==/UserScript== // Keycode for 't'. Add more to disable other ctrl+X interceptions keycodes = [84]; var lastPressedButton = [0]; document.addEventListener('keydown', function(e) { //uncomment to find out the keycode for any given key // alert(e.keyCode ); if (keycodes.indexOf(e.keyCode) != -1 && e.ctrlKey) { e.cancelBubble = true; e.stopImmediatePropagation(); alert("Gotcha!"); } return false; });

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  • Performance: Nginx SSL slowness or just SSL slowness in general?

    - by Mauvis Ledford
    I have an Amazon Web Services setup with an Apache instance behind Nginx with Nginx handling SSL and serving everything but the .php pages. In my ApacheBench tests I'm seeing this for my most expensive API call (which cache via Memcached): 100 concurrent calls to API call (http): 115ms (median) 260ms (max) 100 concurrent calls to API call (https): 6.1s (median) 11.9s (max) I've done a bit of research, disabled the most expensive SSL ciphers and enabled SSL caching (I know it doesn't help in this particular test.) Can you tell me why my SSL is taking so long? I've set up a massive EC2 server with 8CPUs and even applying consistent load to it only brings it up to 50% total CPU. I have 8 Nginx workers set and a bunch of Apache. Currently this whole setup is on one EC2 box but I plan to split it up and load balance it. There have been a few questions on this topic but none of those answers (disable expensive ciphers, cache ssl, seem to do anything.) Sample results below: $ ab -k -n 100 -c 100 https://URL This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking URL.com (be patient).....done Server Software: nginx/1.0.15 Server Hostname: URL.com Server Port: 443 SSL/TLS Protocol: TLSv1/SSLv3,AES256-SHA,2048,256 Document Path: /PATH Document Length: 73142 bytes Concurrency Level: 100 Time taken for tests: 12.204 seconds Complete requests: 100 Failed requests: 0 Write errors: 0 Keep-Alive requests: 0 Total transferred: 7351097 bytes HTML transferred: 7314200 bytes Requests per second: 8.19 [#/sec] (mean) Time per request: 12203.589 [ms] (mean) Time per request: 122.036 [ms] (mean, across all concurrent requests) Transfer rate: 588.25 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 65 168 64.1 162 268 Processing: 385 6096 3438.6 6199 11928 Waiting: 379 6091 3438.5 6194 11923 Total: 449 6264 3476.4 6323 12196 Percentage of the requests served within a certain time (ms) 50% 6323 66% 8244 75% 9321 80% 9919 90% 11119 95% 11720 98% 12076 99% 12196 100% 12196 (longest request)

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  • Looking for a recommendation on measuring a high availability app that is using a CDN.

    - by T Reddy
    I work for a Fortune 500 company that struggles with accurately measuring performance and availability for high availability applications (i.e., apps that are up 99.5% with 5 seconds page to page navigation). We factor in both scheduled and unscheduled downtime to determine this availability number. However, we recently added a CDN into the mix, which kind of complicates our metrics a bit. The CDN now handles about 75% of our traffic, while sending the remainder to our own servers. We attempt to measure what we call a "true user experience" (i.e., our testing scripts emulate a typical user clicking through the application.) These monitoring scripts sit outside of our network, which means we're hitting the CDN about 75% of the time. Management has decided that we take the worst case scenario to measure availability. So if our origin servers are having problems, but yet the CDN is serving content just fine, we still take a hit on availability. The same is true the other way around. My thought is that as long as the "user experience" is successful, we should not unnecessarily punish ourselves. After all, a CDN is there to improve performance and availability! I'm just wondering if anyone has any knowledge of how other Fortune 500 companies calculate their availability numbers? I look at apple.com, for instance, of a storefront that uses a CDN that never seems to be down (unless there is about to be a major product announcement.) It would be great to have some hard, factual data because I don't believe that we need to unnecessarily hurt ourselves on these metrics. We are making business decisions based on these numbers. I can say, however, given that these metrics are visible to management, issues get addressed and resolved pretty fast (read: we cut through the red-tape pretty quick.) Unfortunately, as a developer, I don't want management to think that the application is up or down because some external factor (i.e., CDN) is influencing the numbers. Thoughts? (I mistakenly posted this question on StackOverflow, sorry in advance for the cross-post)

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  • Wastage of resources in Virtualization

    - by Sabeen Malik
    I have asked this question on SO, but was suggested that i ask it here on SF, so here it goes. http://stackoverflow.com/questions/3010753/wastage-of-resources-in-virtualization I am not sure if this is the right place to ask the question. However i hope it is. When looking for a VPS earlier today, I was trying to understand how each container would work in the background. Keeping in mind the fact that the operating system uses most of the memory and power on a system, wouldn't having multiple operating systems in the same machine mean more wastage of resources. For instance if i was running centOS on a dedicated box and it was running lets say 20 background OS level processes. Then i go and install a virtualization platform and install 5 more centOS virtual machines in the same system which are exactly the same as the host operating system. Doesn't this mean duplication of those 20 processes 6 times? So internally the context switching is happening between 120 processes instead of 20? Further Notes: Here is an example of what i am thinking: I have a master-slave configuration for a long running, cpu + memory intensive process, which can be distributed to 4 machines. Lets say when the process runs on these 4 machines with lets say 1 Gh CPU and 1 Gig RAM, i get 400 results per hour from the cluster (assuming 100 results from one machine) . Now i get a bigger machine ( lets say 4Gh and 4 Gig RAM), have 4 virtual hosts on it with 1 Gz CPU and 1 Gig RAM. Will this configuration give me the same 4 results per hour from these 4 virtual hosts?

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  • NGINX server_name issues

    - by Unai
    I have the following simple server block on NGINX: server { listen 80; listen 8090; server_name domain.com; autoindex on; root /home/docroot; location ~ \.php$ { include /usr/local/nginx/conf/fastcgi_params; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /home/docroot$fastcgi_script_name; fastcgi_pass 127.0.0.1:9000; } } After I include the relevant settings on my hosts file I get the following (unexpected) behavior: http: //domain.com/ and http: //domain.com:8090/ work fine; http: //domain.com:8090/future-cell-phone-technology-01-150x150.jpg works; http: //domain.com/future-cell-phone-technology-01-150x150.jpg - ERROR! "The connection was reset" (note.- added a space after http: to avoid link protection but this is not really promoting anything) I've been troubleshooting (3) for a couple hours and I'm unable to identify the culprit. I'm running NGINX 1.0.10 (latest stable) on Debian 6.0.2 32 bits. This NGINX instance runs another 40 or 50 sites with no problems.

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  • How to setup Python with Lighttpd and FastCGI (like PHP)

    - by johndir
    Running Lighttpd on Linux, I would like to be able to execute Python scripts just the way I execute PHP scripts. The goal is to be able to execute arbitrary script files stored in the WWW directory, e.g. http://www.example.com/*.py. I would not like to spawn a new Python instance (interpreter) for every request (like done in regular CGI, if I'm not mistaken), which is why I'm using FastCGI. Following Lighttpd's documentation, the following is the FastCGI part of my config file. The problem is that it always runs the /usr/local/bin/python-fcgi script for every *.py file, regardless of the content of that file: http://www.example.com/script.py [output=>] "python-fcgi: test" (regardless of the content of script.py) I'm not interested in using any framework, but simply executing individual [web] scripts. How can I make it act like PHP, executing any script in the WWW directory by requesting it's path? /etc/lighttpd/conf.d/fastcgi.conf: server.modules += ( "mod_fastcgi" ) index-file.names += ( "index.php" ) fastcgi.server = ( ".php" => ( "localhost" => ( "bin-path" => "/usr/bin/php-cgi", "socket" => "/var/run/lighttpd/php-fastcgi.sock", "max-procs" => 4, # default value "bin-environment" => ( "PHP_FCGI_CHILDREN" => "1", # default value ), "broken-scriptfilename" => "enable" ) ), ".py" => ( "python-fcgi" => ( "socket" => "/var/run/lighttpd/fastcgi.python.socket", "bin-path" => "/usr/local/bin/python-fcgi", "check-local" => "disable", "max-procs" => 1, ) ) ) /usr/local/bin/python-fcgi: #!/usr/bin/python2 def myapp(environ, start_response): start_response('200 OK', [('Content-Type', 'text/plain')]) return ['python-fcgi: test\n'] if __name__ == '__main__': from flup.server.fcgi import WSGIServer WSGIServer(myapp).run()

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  • Running Debian as guest operating system on a Hyper-V VM

    - by kce
    Hello. Layer-9 considerations are prompting a migration from Citrix XenServer to Hyper-V as our shop's virtualization platform of choice. This will require me to migrate our existing virtual machines from XenServer to Hyper-V. A hand full of these VMs are running Debian. Unfortunately, Debian does not seem to be on the list of approved/supported guest operating systems. In fact it seems that running Debian as a guest operating system of is rather difficult, although apparently not impossible. I have two interrelated questions: Does anyone have any experience running a Debian guest on Hyper-V? Is it one of those things where it just will not work at all or is more along the lines of "it will probably work fine, but we won't support it". Any experience here, positive or negative, would be helpful. How much of a bad idea is it to deviate from Hyper-V's list of supported guest operating systems? Again, is it either basically asking for Bad Things (TM) to happen or is just another instance of "it will probably work fine, but we won't support it"? Or is it somewhere in the middle? Thank you.

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