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Automated Linux VMs on Hyper-V 2012

- by Mick

I have a requirement to create a ton of linux VMs for our customers (we run managed infrastructure) on Hyper-V 2012 in the coming months and I have an issue with automating it. Here is how I need it to work: User accesses their web page and creates a VM. VM is created with a unique IP and name User logs in over SSH I know Hyper-V quite well and can work with powershell and am a C# programmer so the development side of things is taken care of. I also know enough about Linux to be at least competent: I have used it on and off for a number of years but not done anything Enterprise-level with it. All this can be done easily by manual processes but I need to be able to script or program this to automate it as there could be hundreds of them being created but I don't know how. My first thought is to have a database with random-generated names and IPs already created but I don't know how to get a Linux VM to boot up and grab one from the database... I suppose a Kickstart script would take care of it but I don't know what to do from there. Here is what is bouncing around in my head: Create a std linux build. - Easy to do Someone clicks "Create VM" and I pull a name and IP from the database and write it to a kickstart script. - Easy to do I could then open the template VHDX file and copy in the script and then save it. - Not sure if possible User boots up new VM and the kickstart script gives it the name and IP I assigned it. My problem is that I don't know how to open a VHDX file and insert a kickstart script into it... can't figure it out. I am reaching here and this solution may be miles off... I am more used to creating Windows VMs with scripts and so on which i am more familiar with... any help would be appreciated. Thanks Mick

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How to debug silent hang on shutdown of Solaris 10?

- by jblaine

We're experiencing a mysterious hang on shutdown of a newly-imaged Oracle/Sun Solaris 10 SPARC box. It is repeatable (in the same spot ... from what we can tell). We let it try to work itself out multiple times for 5-10 minutes and it never progressed. I've never seen this happen before. The last thing displayed on the console is that syslogd was sent signal 15. Prior to us disabling snmpdx on the box, the last thing on the console was that snmpdx was sent signal 15 (after syslogd was sent signal 15). While very rare to find, in Solaris days past, I'd have a better idea from experience where the problem might be, and could then narrow things down further with silly (but effective) debugging echo statments in /etc/*.d scripts. With SMF in the picture, I'm not really quite sure where to start. We forced a crash dump via sync at the {ok} prompt for later analysis, and then let the box come up because it's a production server and our scheduled outage window was closing. /var/adm/messages shows nothing of use. How would you debug this situation? mdb ps of the savecore shows the following processes were running at hang time (afsd is the OpenAFS client and that many are expected): > > ::ps S PID PPID PGID SID UID FLAGS ADDR NAME R 0 0 0 0 0 0x00000001 00000000018387c0 sched R 108 0 0 0 0 0x00020001 00000600110fe010 zpool-silmaril-p R 3 0 0 0 0 0x00020001 0000060010b29848 fsflush R 2 0 0 0 0 0x00020001 0000060010b2a468 pageout R 1 0 0 0 0 0x4a024000 0000060010b2b088 init R 1327 1 1327 329 0 0x4a024002 00000600176ab0c0 reboot R 747 1 7 7 0 0x42020001 0000060017f9d0e0 afsd R 749 1 7 7 0 0x42020001 00000600180104d0 afsd R 752 1 7 7 0 0x42020001 0000060017cb44b8 afsd R 754 1 7 7 0 0x42020001 0000060017fc8068 afsd R 756 1 7 7 0 0x42020001 0000060017fcb0e8 afsd R 760 1 7 7 0 0x42020001 00000600177f4048 afsd R 762 1 7 7 0 0x42020001 000006001800f8b0 afsd R 764 1 7 7 0 0x42020001 000006001800ec90 afsd R 378 1 378 378 0 0x42020000 0000060013aee480 inetd R 7 1 7 7 0 0x42020000 0000060010b28008 svc.startd R 329 7 329 329 0 0x4a024000 00000600110ff850 sh Z 317 7 317 317 0 0x4a014002 0000060013b3a490 sac

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Best tool for monitoring backups, etc. and trending statstics from that data

- by Randy Syring

I have done some research on nagios, opennms, and zenoss but am not confident that I have found what I am looking for. The main driving force for me right now is being able to monitor backups. This includes mysql, mssql, and eventually some file system backups. We have a tool that wraps the backup process for these different systems and collects statistics. So, items like: number of databases backed up size of db backup file size of db backup file compressed time to make backup time to zip file I want to be able to A) have notifications if the jobs are not run according to schedule B) be able to set thresholds on the statistics which would trigger notifications C) I want to be able to trend and graph the statistics I am planning on sending this information to the monitoring application through an HTTP POST. Or, the monitoring application could pull it from a log file as well. However, we will have other processes with other "arbitrary" (from the monitoring system's perspective) statics that will want to monitor and trend, so flexibility is very important. The tool or tools should also be able to do general monitoring and trending of network interfaces, server load, etc. Once we get the backup monitoring in place, we will want to include those items as well. Thanks.

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Webserver python update script

- by ThePyCoder

So i have made this website on which you can trade stocks based on real stock quotes with virtual money. The stock quotes are in a MySQL database and are updated using a python script which runs every minute or so. Now, this works fine on my local machine with xampp but how about moving the project to a commercial web server? Basically I want my page hosted by a professional company but do those kind of servers support python scripts running in the background? Because a dedicated server would be to expensive and the script does some other sql tasks too so it can't be replaced by PHP or so... So, are there any good web hosting services out there who give me the possibility of running a script in the background and hosting a website in the foreground? For what server specifications do i have to look for? Thnx in advance! PS: I've done some research, and I found a python supporting web host WITH ssh support. Is that what I need? Or is the ssh not allowed to start processes?

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heavy load on mysql

- by payal

i have dedicated server with very good configuation like 16 gb ram etc but i am facing heavy load from mysql i am running a music wesbite however only one database is running and 5-10 pages are only running.when i click on whm show processlist it shows only 2-3 processes However whm load is always less than one but when i click on whm load it shows 20% of cpu usage by mysql and after some time it starts saying can not connect to mysql . mysql server has gone away 1691 (Trace) (Kill) mysql 0 19.2 2.7 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --log- error=/var/lib/mysql/server.xyz.com.err --pid-file=/var/lib/mysql/server.xyz.com.pid i have tested static pages they are coming blezing fast but all dynamic pages which are using mysql is coming damn slow it takes years to open.. my.conf file is [mysqld] key_buffer = 1536M max_allowed_packet = 1M max_connections = 250 max_user_connections = 15 wait_timeout=40 connect_timeout=10 table_cache = 512 sort_buffer_size = 2M read_buffer_size = 2M read_rnd_buffer_size = 8M myisam_sort_buffer_size = 64M thread_cache_size = 8 query_cache_size = 32M server-id = 14 old-passwords = 1 [mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash [myisamchk] key_buffer = 256M sort_buffer_size = 256M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout ihave checked log error file it says nothing.i have increased maximum connnection also to 1000 but still same problem is there .if i disconnect that one databasejust by changing the name of database i can see withing half hour the load of server and mysql goes down to negliglble .i have tested everything and if there are some query which can cause heavy load to server can you please list which type of query can cause heavy load on server then also for 5-10 pages it will never cause that much heavy load. i have seen server with 500 websites but was working just fine.

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Kernel Memory Leak in Ubuntu 9.10?

- by kayahr

After some days of work (Using suspend-to-ram during the night) I notice I loose more and more available memory. Even when I close all applications the situation doesn't improve. I even went down to the command line and closed ALL running processes except the init process and the bash I'm working in. I unmounted all these ram disks which Ubuntu is using, I even unloaded all modules which could be unloaded. But still "free" tells me that 1 GB of RAM is used (without buffers/cache). In "top" there is no visible process which occupies all this memory. The only way to free the memory is restarting the machine. How can I find out where I lose all this memory? Is there a known "suspect" who can cause a problem like this? I'm using Ubuntu 9.10 64 bit on a Dell Latitude E6500 (4 GB RAM) with the latest closed-source nvidia driver and Gnome with Compiz. The applications I use most of the time are firefox and eclipse. Any hints how I can find the problem? I'm not a kernel hacker so if the solution is patching the kernel or something like that then I might be out of the game...

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Linux - preventing an application from failing due to lack of disk space [migrated]

- by Jernej

Due to an unpredicted scenario I am currently in need of finding a solution to the fact that an application (which I do not wish to kill) is slowly hogging the entire disk space. To give more context I have an application in Python that uses multiprocessing.Pool to start 5 threads. Each thread writes some data to its own file. The program is running on Linux and I do not have root access to the machine. The program is CPU intensive and has been running for months. It still has a few days to write all the data. 40% of the data in the files is redundant and can be removed after a quick test. The system on which the program is running only has 30GB of remaining disk space and at the current rate of work it will surely be hogged before the program finishes. Given the above points I see the following solutions with respective problems Given that the process number i is writing to file_i, is it safe to move file_i to an external location? Will the OS simply create a new instance of file_i and write to it? I assume moving the file would remove it and the process would end up writing to a "dead" file? Is there a "command line" way to stop 4 of the 5 spawned workers and wait until one of them finishes and then resume their work? (I am sure one single worker thread would avoid hogging the disk) Suppose I use CTRL+Z to freeze the main process. Will this stop all the other processes spawned by multiprocessing.Pool? If yes, can I then safely edit the files as to remove the redundant lines? Given the three options that I see, would any of them work in this context? If not, is there a better way to handle this problem? I would really like to avoid the scenario in which the program crashes just few days before its finish.

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lsof not showing what port a proc is listening on

- by ericslaw

I have many processes on a box listening on several ports. I am trying to map ports to pids. The problem is that lsof is not telling me what ports belong to which process. Given an apache listening on port 80, I can see it listening via netstat: user@host% netstat -an|grep LISTEN|grep 80 *.80 *.* 0 0 49152 0 LISTEN But when I try to map port 80 to a pid I get nothing: user@host% lsof -iTCP:80 -t When I try seeing what sockets that specific pid is using I get: user@host% lsof -lnP -p31 -a -i COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME libhttpd. 31 0 15u IPv4 0x6002d970b80 0t0 TCP *:65535 (LISTEN) Notice the *:65535 in the NAME column. Does anyone know why lsof is not reporting the port in use? I am running as root. I am using a mix of lsof and os versions: lsof v4.77 on Solaris10 sparc lsof v4.72 on Redhat4.2 etc I know that linux solutions can use "netstat -p", so I guess I'm only looking for why solaris isn't working, but I find lsof is frequently silent and not showing me expected data.

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Disconnect from PHP after output generated

- by Oli

I have a LEMP stack. Nginx sitting in front of PHP-FPM. Because some of the sites are heavy and there's OPCode caching, PHP is set up so that there are only 5 child processes running. The aim being that each child can deal with any request in less than half-a-second and then move onto the next request. One problem I've found is that if it's a big chunk of HTML that's getting sent out, and the user has a slow connection, that PHP thread stays occupied until they've finished downloading. Because of my current setup, I have a pretty unforgiving timeout inside PHP where the script is killed after 20 seconds. This is to make sure everybody gets a turn but on a slow connection, this can mean the user gets cut off with a 504 Gateway timeout. I was wondering if there was some sort of buffer solution that I could implement within or just behind Nginx that sent the request through and then... well... buffered the content into its own cache and feed that onto the client as and when they could download it. The aim being that the underlying PHP thread can be freed up. What I'm asking for doesn't have to be PHP-specific. Anything that deals with FastCGI, or even any Nginx-upstream might have a similar issue to this.

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Why is my apache2, mod_fcgid, php configuration causing 100% cpu usage?

- by Scott Lundgren

Page load makes a quick initial connection, then hangs about 10 seconds before the page renders. When the server load goes up I start watching top & I see that both CPUs get pegged at times to 100% by between 4-8 processes of php-cgi. My theory is that since I never see RAM usage never go above 50%, that apache is able to handle the requests coming in, but is queueing them for PHP to process. What is wrong with my mod_fcgid/php configuration ? RHEL 5.4 2 Xeon E5420s @ 2.50 Ghz 4 Gb RAM Apache 2.2.3 Timeout 30 KeepAlive On MaxKeepAliveRequests 0 KeepAliveTimeout 5 <IfModule worker.c> StartServers 2 MaxClients 300 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> mod_fcgid 2.2.10 LoadModule fcgid_module modules/mod_fcgid.so <IfModule !mod_fastcgi.c> AddHandler fcgid-script fcg fcgi fpl php </IfModule> SocketPath run/mod_fcgid SharememPath run/mod_fcgid/fcgid_shm DefaultInitEnv PHPRC "/etc/" FCGIWrapper /usr/bin/php-cgi .php MaxRequestsPerProcess 1500 MaxProcessCount 20 IPCCommTimeout 240 IdleTimeout 240 APC 3.0.19 extension = apc.so apc.enabled=1 apc.shm_segments=1 apc.optimization=0 apc.shm_size=32 apc.ttl=7200 APC cache is 43% used with a 99% hit rate

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FreeBSD's ng_nat stopping pass the packets periodically

- by Korjavin Ivan

I have FreeBSD router: #uname 9.1-STABLE FreeBSD 9.1-STABLE #0: Fri Jan 18 16:20:47 YEKT 2013 It's a powerful computer with a lot of memory #top -S last pid: 45076; load averages: 1.54, 1.46, 1.29 up 0+21:13:28 19:23:46 84 processes: 2 running, 81 sleeping, 1 waiting CPU: 3.1% user, 0.0% nice, 32.1% system, 5.3% interrupt, 59.5% idle Mem: 390M Active, 1441M Inact, 785M Wired, 799M Buf, 5008M Free Swap: 8192M Total, 8192M Free PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 11 root 4 155 ki31 0K 64K RUN 3 71.4H 254.83% idle 13 root 4 -16 - 0K 64K sleep 0 101:52 103.03% ng_queue 0 root 14 -92 0 0K 224K - 2 229:44 16.55% kernel 12 root 17 -84 - 0K 272K WAIT 0 213:32 15.67% intr 40228 root 1 22 0 51060K 25084K select 0 20:27 1.66% snmpd 15052 root 1 52 0 104M 22204K select 2 4:36 0.98% mpd5 19 root 1 16 - 0K 16K syncer 1 0:48 0.20% syncer Its tasks are: NAT via ng_nat and PPPoE server via mpd5. Traffic through - about 300Mbit/s, about 40kpps at peak. Pppoe sessions created - 350 max. ng_nat is configured by by the script: /usr/sbin/ngctl -f- <<-EOF mkpeer ipfw: nat %s out name ipfw:%s %s connect ipfw: %s: %s in msg %s: setaliasaddr 1.1.%s There are 20 such ng_nat nodes, with about 150 clients. Sometimes, the traffic via nat stops. When this happens vmstat reports a lot of FAIL counts vmstat -z | grep -i netgraph ITEM SIZE LIMIT USED FREE REQ FAIL SLEEP NetGraph items: 72, 10266, 1, 376,39178965, 0, 0 NetGraph data items: 72, 10266, 9, 10257,2327948820,2131611,4033 I was tried increase net.graph.maxdata=10240 net.graph.maxalloc=10240 but this doesn't work. It's a new problem (1-2 week). The configuration had been working well for about 5 months and no configuration changes were made leading up to the problems starting. In the last few weeks we have slightly increased traffic (from 270 to 300 mbits) and little more pppoe sessions (300-350). Help me please, how to find and solve my problem?

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prevent IE8 tabs from opening as a new "process in the taskbar"

- by Nano8Blazex

This may have been asked before too... But, anyways. I'm using Windows 7 Ultimate, and IE 8, and have the taskbar in icon view. I'm not sure how to explain this, but I'm amazed at how each tab in IE8 seems to act like a new "process" in the taskbar (as if each tab was a window). Like... each tab acts like a different window in the taskbar although they are actually running in the same window. Now when I use IE 8 it looks (in the taskbar) like there's 15 windows open when in fact the taskbar is simply showing the 15 tabs. More simply put, it's displaying a "stack" for all of the tabs when I'd rather have the icon act like, for example, firefox so that a stack is only shown for the multiple windows. I know that they are meant to be running as separate processes to prevent crashing and the such... but is there a way to disable this strange "taskbar" effect? I'd rather have the taskbar show the main window and not the tabs individually.

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Windows 7 BSOD when changing power plan

- by dd5

i have a strange problem. When i want to change the power plan on my laptop from High performance to Balanced, Windows freezes and i get bsod. The power plan settings are all default. Laptop specs: - Intel Core i3 330M/350M - Intel® HM55 Express Chipset - DDR3 1066 MHz SDRAM 8GB - ATI Mobility™ Radeon HD5730 1GB DDR3 VRAM - Intel SSD330 128gb - Windows 7 Home premium I've searched the internets but couldnt find a similar issue. BSOD first started when i installed this SSD and stopped when i've updated the chipset controller driver then started again yesterday when i wanted to change the power settings plan.Minidump file here. Any help with this weird issue appriciated, thanks. Edit: - i've ran Memory diagnostic tool, - Intel SSD diagnostics - and updated the firmware to 3.2.1. Non of these steps worked or shown signs of errors - but still got BSOD when changing power plan settings. After analizing the dump file via osronline.com here a first few lines: CRITICAL_OBJECT_TERMINATION (f4) A process or thread crucial to system operation has unexpectedly exited or been terminated. Several processes and threads are necessary for the operation of the system; when they are terminated (for any reason), the system can no longer function. Arguments: Arg1: 0000000000000003, Process Arg2: fffffa8008661b30, Terminating object Arg3: fffffa8008661e10, Process image file name Arg4: fffff800033de270, Explanatory message (ascii) -- Solution -- Provided by Vinayak: After installing the Intel Rapid storage Technology from MajorGeeks, i didn't experience a BSOD since, thank you :)

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Port 22 is not responding

- by Emanuele Feliziani

I'm trying to make the jump to VPS from shared hosting for better performances and greater flexibility, but am stuck with the fact that I can't access the machine via ssh. First of all, the machine is a CentOS 6.3 cPanel x64 with WHM 11.38.0. Sshd is running (it appears in the current running processes). Making a port scan I see that port 22 is not responding. Port 21 is, but I am not able to access the machine via ftp (I think it's a security measure, but I don't know where to disable/enable it). So, I'm stuck in WHM and have no way to access the configuration of the machine, neither via ssh nor with ftp/sftp. When trying to connect with ssh via Terminal I only get this: ssh: connect to host xx.xx.xxx.xxx port 22: Operation timed out I also tried to access with the hostname instead of the IP address and it's the same. There seem to be no firewall in WHM and I have whitelisted my home IP address to access ssh, though there were no restrictions in the first place. I have been wandering through all the settings and options in WHM for several hours now, but can't seem to find anything. Does anybody have a clue as to where I should start investigating? Update: Thanks everyone. It was in fact a matter of firewall. There was a firewall not controlled by the WHM software. I managed to crack into the console from the vps control panel (a terrible, terrible java app that barely took my keyboard input) and disabled the firewall altogether running service iptables stop so that I was able to access the console via ssh with the terminal. Now I will have to set up the firewall again because the command I ran looks like having completely wiped the iptables. Can you recommend any newby-friendly resource where I can learn how to go about this and what should I block? Or should I just go with something like this: http://configserver.com/cp/csf.html ? Thanks again to everyone who helped me out.

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Applications randomly alt-tab? (especially full screen games)

- by Henry Scotts

I'm not sure when this began, how it happens, or why it happens, but it is quite bothersome and apparently random. Just randomly throughout the day my computer will just go to the desktop. I could be in a full screen game and it will just immediately alt tab and present the desktop. Or I could be watching a movie and this happens. Sometimes it happens once every three hours and other times (just today actually) it did it twice in the span of 30 seconds. I am positive I am not pressing a hotkey because I launched a game, sat idle, and noticed it alt tab while cleaning up around my room after about 20 minutes. Sometimes it goes days without this happening. Specs: Windows 7 Ultimate 64 Bit, 10 gigs of RAM, GeForce GTX 260, Intel Xeon CPU. I also have basically nothing running when it happens other than the game and FireFox. My FireFox add-ons: Adblock Plus, Download Statusbar, Firebug, FirePHP, lazarus form recovery, tree-style-tabs, yslow. I doubt FireFox is causing the issue but I figured I'd include it anyway because it is the only application I have running when it happens. As for user processes I have running: VCDDaemon (context menu for virtual clone drive), razerhid (mouse), OSD, taskhost, dmw (desktop window manager), anyfullscreengame, audiorepeater, netsession_win, explorer, razerofa, tsvncache, firefox, plugin-container, and EKIJ5000MUI (printer). Whew. Okay. That was a lot of information. If someone could diagnose this I would be most grateful for this has been around with me for years.. Thanks for reading! PS: I doubt it's a virus because I never download illegal software and pretty much only browse Reddit and Stackexchange and play games. If it was a virus it would be a pretty lame one.. Hah..

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How to kill tasks in Windows 7 when even Task Manager won't open or respond?

- by endolith

Occasionally one of my computers will get so bogged down that everything locks up, Ctrl+Alt+Del doesn't work, Task Manager won't open, or they work, but are opening so slowly that it will take hours or days to shut down other processes and regain control of the computer, etc. Is there a way to, for instance, force Task Manager to be highest priority so it always opens immediately with Ctrl+Shift+Esc even when some other process/driver is hogging the CPU? Is there some other program that can run in the background and open immediately like this? This question isn't about fixing "underlying problems". No matter how much memory you have, it's still possible for a rogue process to eat it all up and lock up the computer in page fault thrashing, hog the CPU, etc. This question is about how to take back control of the computer when that happens. Basically when these kind of lock-ups happen, I want to open some kind of task manager that pauses every other process and allows me to kill one of them, and then let everything resume so I can save my work, etc. Otherwise my only option is to hold down the power button. Antifreeze is supposed to do exactly what i want, pausing all other applications and starting a task manager to kill the offender, but in my testing, it actually does neither.

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Windows 7 hangs with 100% disk activity but only when online

- by jeremy

I have the same problem as seemingly many other people here, and I think we might all be experiencing the same issue: a compatibility issue in Windows 7 between hard drive and network controller or drivers. I've tried firmware updates of my entire board, wiping my drive and reinstalling from scratch. And yet the problem persists, which suggests it is an operating system error, as the hard drive checks out 100% physically. Additionally, the only time it does not occur is when in safe mode WITHOUT networking. With networking, there are spikes in disc access every so often and a huge flow of processes accessing the disc simultaneously that literally "stick" the disc, and physically jolting my computer unsticks it. Again, this has been tested for hours in a professional service environment, and without network access on, things are fine. As soon as there's network access available, the disc access occasionally cranks up to 100% and sticks everything. I'm using Microsoft Security Essentials, but this also happened under Norton, then McAfee. Again, this happened again after a complete wipe, so the likelihood of malware causing it seems low. I don't visit unsecure sites anyway, as far as I know. This, to me, narrows it down to a Windows 7 process that is somehow repeatedly corrupted, perhaps a corrupt .dll or driver, causing a conflict at the operating system level and temporary hard drive failure. I would encourage anyone who knows more about this stuff (which is probably most people!) to take a shot at this one, and I would encourage anyone else with a sticking hard drive in windows 7 64-bit to check on whether it occurs during safe mode without networking.

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Bind9 Debian Not responding

- by Marc

Im trying to set up a webserver with Bind9, apache2 on Debian 6. I am trying to learn to do it manualy so I do not have any control panels or anything just the command line. I have a domain name lets call it www.example.com I want a virtual host setup so that I can have multiple websites with different names on my server. I have ns1.example.com and ns2.example.com registered at my servers IP (123.456.789.12). Below is my Bind9 named.conf.options options { directory "/var/cache/bind"; // If there is a firewall between you and nameservers you want // to talk to, you may need to fix the firewall to allow multiple // ports to talk. See http://www.kb.cert.org/vuls/id/800113 // If your ISP provided one or more IP addresses for stable // nameservers, you probably want to use them as forwarders. // Uncomment the following block, and insert the addresses replacing // the all-0's placeholder. // forwarders { // 0.0.0.0; // }; auth-nxdomain no; # conform to RFC1035 listen-on-v6 { any; }; }; This is the default I'm not sure if i was supposed to edit it. I didn't. Here is my named.conf.default-zones: // prime the server with knowledge of the root servers zone "." { type hint; file "/etc/bind/db.root"; }; // be authoritative for the localhost forward and reverse zones, and for // broadcast zones as per RFC 1912 zone "localhost" { type master; file "/etc/bind/db.local"; }; zone "127.in-addr.arpa" { type master; file "/etc/bind/db.127"; }; zone "0.in-addr.arpa" { type master; file "/etc/bind/db.0"; }; zone "255.in-addr.arpa" { type master; file "/etc/bind/db.255"; }; zone "example.com.com" { type master; file "etc/bind/example.com.db"; }; named.conf.local Is an empty file with a comment saying to do local configuration here. example.com.db looks like this: ; BIND data file for mywebsite.com ; $ORIGIN example.com. $TTL 604800 @ IN SOA ns1.example.com. [email protected]. ( 2009120101 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; IN NS ns1.example.com. IN NS ns2.example.com. IN MX 10 mail.example.com. localhost IN A 127.0.0.1 example.com. IN A 123.456.789.12 ns1 IN A 123.456.789.12 ns2 IN A 123.456.789.12 www IN A 123.456.789.12 ftp IN A 123.456.789.12 mail IN A 123.456.789.12 boards IN CNAME www These are all settings I've found from various tutorials. Now when i go to intodns I get: You should already know that your NS records at your nameservers are missing, so here it is again: ns1.example.com ns2.example.com Can someone help me? I'm not sure what Im doing wrong.

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Windows 7, HTTPS WebDav: Asks for password twice and fails. Any workarounds?

- by AutoDMC

Howdy. I have a Dav server running with PHP SabreDav (code.google.com/p/sabredav/wiki/Windows) on Cherokee at an HTTPS secured URL. It's set to use https, and uses Digest Authentication. I can log in with multiple browsers and a few third party clients (BitKinex and Java AnyClient can connect and browse as well, caveats below). However, when attempting to log in with Windows 7 (surprise, surprise), it asks for my password twice, then tells me that my folder is invalid. I have verified that the server is using Digest authentication. I've verified multiple times that third party software can connect. I even went out and bought a GoDaddy SSL certificate so my SSL wouldn't be self signed anymore. I've applied the registry hacks here: support.microsoft.com/kb/943280 (Note that the article says the "fix" already exists for Windows 7, I just need magical registry hax to get it to work) I've applied the registry hacks here: support.microsoft.com/kb/941050 I've applied the registry hacks here: support.microsoft.com/kb/841215 (Supposedly allows Basic Auth, which shouldn't apply, but why not?) All to no avail; Windows continues to ask for my password twice, then state that "The folder you entered does not appear to be valid. Please choose another." Try the command line? Sure: I've attempted to access with NET USE "https://dav.example.com/" password /USER:me (System error 59) I've attempted to access with NET USE "https://dav.example.com/" (System error 1790) I've attempted to access with NET USE "https://dav.example.com/subdir/" password /USER:me (System error 59) I've attempted to access with NET USE "https://dav.example.com/subdir/" (System error 1790) For good luck: ping dav.example.com ... works. And again, web browsers can access the share just fine, so can third party tools. Best I can tell at this point is "HAHA, NO WEBDAV FOR YOU ON WINDOWS 7" which would be fine except everyone who will be using this application... uses Windows 7. And most are not as persistent or pugnacious as I am. I feel like I've burned through every random suggestion I've found anywhere in the first 10 pages of Google on every search term I can think of. Any ideas? I need it to be Webdav, I need it to be over HTTPS, and I really do need a method to access it from Windows 7. EXTRA DETAIL: However, the "third party" programs I've tried have either been buggy, incomplete, or have silly ... "glitches." For example, BitKinex seems to fixate on any http error codes sent, so if there's a glitch reading a directory, BAM, that directory is always listed empty. Long directory listings also show up as blank, even though the transfer panel shows that directory listing is still taking place. In any case, BitKinex is useless for development purposes for the reasons above. And besides, I'm building this for people other than myself, people who will want to get this dav share working "the regular way."

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MySQL getting stuck, eating up disk i/o

- by bonez05

Hi all, Using mySQL 5.0.51 on Solaris . At intermittent times it looks like MySQL is getting 'stuck' . The disk usage on the server spikes to 98% busy from reads. I used dtrace (specifically DTrace toolkit - iosnoop) to track down what processes was using all the reads. Mysql was calling tablename.TDM hundreds of times per second. There was no more than average load on the webserver that could account for this. There were no cronjobs running, and no other utilities like mysqldump or anything. It is a master / slave replication setup. As a jury-rigged fix, I altered the mysql table from 'tablename' to 'tablename2' and then back to 'tablename' This fixed the problem temporarily, and "unsticks" mysql. The disk usage goes back down and dtrace is no longer showing hundreds of reads to 'tablename.TDM' / second. A couple ideas I had are: 1. MySQL version bug 2. Infinite loop somewhere in my application (which i'm not sure how likely this is) 3. ?? Has anybody seen this before or have any insight? Thanks

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Synergy: Cannot send media keys from Linux to Mac

- by CraftyThumber

I have a Linux Synergy server (Si-Linux) serving just one Mac client (Macbook Pro UK) (SiBook-Pro.local). On my Linux server I am using a USB Apple keyboard with the exact layout of the laptops keyboard (the compact UK aluminium keyboard). I would like to send the media keys to the Mac client at all times and I have attempted the following in my synergy.conf: keystroke(AudioPlay) = keystroke(AudioPlay,SiBook-Pro.local) This did not seem to work so I ran both the server and client as foreground processes and with debugging enabled and observed the following: Server Log: DEBUG1: activate actions DEBUG1: hotkey: keyDown(AudioPlay,SiBook-Pro.local) DEBUG1: onKeyDown id=57523 mask=0x0000 button=0x0000 DEBUG1: send key down to "SiBook-Pro.local" id=57523, mask=0x0000, button=0x0000 DEBUG1: deactivate actions DEBUG1: hotkey: keyUp(AudioPlay,SiBook-Pro.local) DEBUG1: onKeyUp id=57523 mask=0x0000 button=0x0000 DEBUG1: send key up to "SiBook-Pro.local" id=57523, mask=0x0000, button=0x0000 Client Log: DEBUG1: recv key down id=0x0000e0b3, mask=0x0000, button=0x0000 DEBUG1: mapKey e0b3 (57523) with mask 0000, start state: 0000 DEBUG1: key e0b3 is not on keyboard DEBUG1: recv key up id=0x0000e0b3, mask=0x0000, button=0x0000 DEBUG1: recv enter, 1279,386 5 2000 As you can see, the client claims the key received is not on keyboard. I don't understand since it is the same key as is on the Macbook's keyboard. I tried to reverse the client-server config to see if I could capture the key being sent if I pressed the Play button on the Macbook but the key doesn't seem to even make it to Synergy. Almost all keyboard presses get logged but the media keys seem to bypass the logs and just execute their function locally. E.g. I press play on the Macbook (with the Macbook as the server) and the key plays music on the Macbook and the key is not logged to the debug log.

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Method to integrate Powershell scripts with non-Windows workflow?

- by Matt Simmons

I love the smell of new machines in the morning. I'm automating a machine creation workflow that involves several separate systems across my infrastructure, some of which involve 15 year old perl scripts on Solaris hosts, PXE Booting Linux systems, and Powershell on Windows Server 2008. I can script each of the individual parts, and integrating the Linux and Unix automation is fairly straightforward, but I'm at a loss as to how to reliably tie together the Powershell scripts to the rest of the processes. I would prefer if the process began on a Linux host, since I imagine that it will end up as a web application living on an Apache server, but if it needs to begin on Windows, I am hesitantly okay with that. I would ideally like something along the lines of psexec for Linux to run against Windows, but the answer in that direction appears to by Cygwin, and as much as I appreciate all of the hard work that they put in, it has never felt right, if you know what I mean. It's great for a desktop and gives a lot of functionality, but I feel like Windows servers should be treated like Windows servers and not bastardized Unix machines (which, incidentally, is my argument against OSX servers, too, and they're actually Unix). Anyway, I don't want to go with Cygwin unless that's the last and only option. So I guess what I'm asking is if there is a way to execute jobs on Windows machines from Linux. Without Cygwin. I'm open to ideas and suggestions, including "Look idiot, everyone uses Cygwin, so suck it up and deal with it". Thanks in advance!

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How to use Public IP in case of two ISP when two differs from each other

- by user1471995

Please bare with my long explanation but this is important to explain the actual problem. Please also pardon my knowledge with PFsense as i am new to this. I have single PFSense box with 3 Ethernet adapter. Before moving to configuration for these, i want to let you know i have two Ethernet based Internet Leased Line Connectivity let's call them ISP A and ISP B. Then last inetrface is LAN which is connected to network switch. Typical network diagram ISP A ----- PFSense ----> Switch ---- > Servers ISP B ----- ISP A (Initially Purchased) WAN IP:- 113.193.X.X /29 Gateway IP :- 113.193.X.A and other 4 usable public IP in same subnet(So the gateway for those IP are also same). ISP B (Recently Purchased) WAN IP:- 115.115.X.X /30 Gateway IP :- 115.115.X.B and other 5 usable public IP in different subnet(So the gateway for those IP is different), for example if 115.119.X.X2 is one of the IP from that list then the gateway for this IP is 115.119.X.X1. Configuration for 3 Interfaces Interface : WAN Network Port : nfe0 Type : Static IP Address : 113.193.X.X /29 Gateway : 113.193.X.A Interface : LAN Network Port : vr0 Type : Static IP Address : 192.168.1.1 /24 Gateway : None Interface : RELWAN Network Port : rl0 Type : Static IP Address : 115.115.X.X /30 (I am not sure of the subnet) Gateway : 115.115.X.B To use Public IP from ISP A i have done following steps a) Created Virtual IP using either ARP or IP Alias. b) Using Firewall: NAT: Port Forward i have created specific natting from one public IP to my internal Lan private IP for example :- WAN TCP/UDP * * 113.193.X.X1 53 (DNS) 192.168.1.5 53 (DNS) WAN TCP/UDP * * 113.193.X.X1 80 (HTTP) 192.168.1.5 80 (HTTP) WAN TCP * * 113.193.X.X2 80 (HTTP) 192.168.1.7 80 (HTTP) etc., c) Current state for Firewall: NAT: Outbound is Manual and whatever default rule are defined for the WAN those are only present. d) If this section in relevant then for Firewall: Rules at WAN tab then following default rule has been generated. * RFC 1918 networks * * * * * Block private networks * Reserved/not assigned by IANA * * * * * * To use Public IP from ISP B i have done following steps a) Created Virtual IP using either ARP or IP Alias. b) Using Firewall: NAT: Port Forward i have created specific natting from one public IP to my internal Lan private IP for example :- RELWAN TCP/UDP * * 115.119.116.X.X1 80 (HTTP) 192.168.1.11 80 (HTTP) c) Current state for Firewall: NAT: Outbound is Manual and whatever default rule are defined for the RELWAN those are only present. d) If this section in relevant then for Firewall: Rules at RELWAN tab then following default rule has been generated. * RFC 1918 networks * * * * * * Reserved/not assigned by IANA * * * * * * Last thing before my actual query is to make you aware that to have multiple Wan setup i have done following steps a) Under System: Gateways at Groups Tab i have created new group as following MultipleGateway WANGW, RELWAN Tier 2,Tier 1 Multiple Gateway Test b) Then Under Firewall: Rules at LAN tab i have created a rule for internal traffic as follows * LAN net * * * MultipleGateway none c) This setup works if unplug first ISP traffic start routing using ISP 2 and vice-versa. Now my main query and problem is i am not able to use public IP address allocated by ISP B, i have tried many small tweaks but not successful in anyone. The notable difference between the two ISP is a) In case of ISP A there Public usable IP address are on same subnet so the gateway used for the WAN ip is same for the other public IP address. b) In case of ISP B there public usable IP address are on different subnet so the obvious the gateway IP for them is different from WAN gateway's IP. Please let me know how to use ISP B public usable IP address, in future also i am going to rely for more IPs from ISP B only.

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Suddenly getting lock timeouts with MySQL

- by Marc Hughes

We've got a web app hosted on Amazon Web services. Our database is a multi-az RDS MySQL server running 5.1.57 and 3-4 app servers talk to it. Today, we started seeing a lot of errors along the lines of "Lock wait timeout exceeded; try restarting transaction" - almost 1% of POST requests are seeing this. There have been no modifications to the code running on the site. There have been no schema changes. We haven't had a big spike in traffic. I've been looking at the processes running, and none seem out of control. I tried scaling our RDS instance from a small to a large, with no effect. Two days ago, Amazon had some outages. As part of the recovery from that, our RDS server, and our app servers ended up in different availability zones, but all within the same region. But yesterday, everything was fine so I'm not convinced that's related. The lock timeouts are in different types of requests and occur in different InnoDB tables. I have noticed the number of open connections jumped when we started seeing problems, but they may be a symptom and not a cause. What are my next steps in debugging this?

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How to encourage Windows administrators to pick up scripting?

- by icelava

When I worked as an administrator in my first job, I was frustrated that our administration processes with Windows servers were a series of point-and-clicks; we could never match the level of efficiency with the Unix servers which had a group of shell scripts to automate a lot of the work. I soon read about WSH and ADSI and wasted no time learning just how much automation I was able to achieve with scripting. There was a huge problem though - almost none of my Windows colleagues were really interested in learning scripting. They seemed happy with the manually mouse-clicking chores and were never excited at the prospect of using scripts to do the work on their behalf. I struggled to convince them to pick up scripting skills despite the evident increases in efficiency. I left that job in pursuit of a full-time software development career thereafter. Almost a decade on working in various environments and different customers, I still encounter Windows administrators mainly possessing this general "mood" where they would avoid scripting as much as possible. Despite the increasing level of accessibility Windows server technologies are opening up for scripting and automation. I am almost certain the majority of administrators are administrators precisely because they absolutely hate performing any kind of programming duties. What are some means to encourage and motivate administrators that scripting can really help them in the long run?

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