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• Network monitoring tools with API features

  - by Kev

  We use ks-soft's Advanced Hostmonitor package to monitor around 2000 items on our network. We think it's great, the chap that supports it is fantastic, the product is fast, stable and mature but I feel as as we grow as a company it's beginning to show some friction points in the area of integration with our back office admin systems. One of the things we'd like to do is be able to add new tests to whatever monitoring tool we use via an API. For example, when orders for servers come from our retail interface, the server gets built automatically, and as part of the automated build process we'd like to automatically add new tests to the network monitoring systems. Hostmonitor has some support for this via a feature called HM Script but we're starting to encounter some speedbumps - we can't add new operators/users we can't define new "Action Profiles" - these are the actions to be taken when a test goes good or bad. What we love about hostmonitor though are the Action Profiles. For example if a Windows IIS box goes bad our action profile for a bad test does something like: Check host again (one time) Wait another 30 seconds then test again Try restart app pool on remote machine (up to two times) Send an email to ops about the restart failure Try restarting IIS on remote machine (up to four times) Page duty admin (up to 5 times - stops after duty admin ACKS alert) Page backup duty admin (5 times - stops after duty admin ACKS alert) I'm starting to look around at other network monitoring tools and I'm looking for: a comprehensive API to be able to add/remove/control tests/test "action profiles"/operators (not just plugins, we need control and admin interfaces) the ability to have quite detailed action/escalation profiles (and define these via an API) I've looked at Nagios and Icinga but Ican't seem to glean from their documentation whether we could have these features or not, or if we could, how much work would be involved to implement/customise. Can anyone provide any advice, guidance or experiences?

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• How to configure Hyper-V failover cluster to live migrate when dynamic memory runs out?

  - by Matt Johnson

  Appologies in advance that this is not a direct programming question, but I have a feeling that the solution involves custom powershell scripts (maybe), so this is as good a place to ask as any. I maintain a website that has a large Hyper-V cluster for SQL Servers. We are using Windows 2008 R2 SP1, and the new "dynamic memory" feature. I've already ready reviewed the Best Practices Guide, and implemented it's suggested configuration. Everything works well, except that when SQL demand increases memory pressure to expand to more memory than is available on the physical machine, the memory status goes into the "Warning" state and stays there. I assume the hypervisor is using a swapfile on the host to fulfill the memory requirement, thus slowing the virtual machine down. When this happens, there are plenty of other nodes in the cluster that have available resources. I can live-migrate the virtual server over there and everything works, and the warnings go away. Now how can I automate this? I see no menu options in either Hyper-V or the Failover Cluster Manager for performing a migration or shutdown when dynamic memory goes into the warning state. Any ideas about how to script this, or monitor it and invoke the action directly, would be helpful. If the solution involves coding, powershell would be ideal, but I could envison this as a .Net Service that monitors for this state and kicks off the migration request. I just don't know what objects are involved in doing the monitoring or kicking off the live migration. Thanks in advance.

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• 500 Internal Server Error after changing .NET Framework Version to 4.0 in IIS7

  - by René

  I just changed my .NET Framework Version of the Application Pools in IIS7 Manager, following these instructions. Now when I try to re-upload my ASP.Net page, it shows me a 500 - Internal server error. I have tried uploading it in .net 2.0(X86, X64, AnyCPU), and 4.0(X86, X64, AnyCPU), and everything gives the same error. This is all the details the error gives me: "There is a problem with the resource you are looking for, and it cannot be displayed." When keeping the .NET version on 2.0 on the server, it works just fine. Also, when uploading "index.htm", it works fine as well, it just shows the HTML page. This is on Windows Server 2008 R2, by the way. EDIT: I have finally found out how to get the error details. Here they are: "Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list." "Most likely causes: •Managed handler is used; however, ASP.NET is not installed or is not installed completely. •There is a typographical error in the configuration for the handler module list. Things you can try: •Install ASP.NET if you are using managed handler. •Ensure that the handler module's name is specified correctly. Module names are case-sensitive and use the format modules="StaticFileModule,DefaultDocumentModule,DirectoryListingModule"." I am sure that I have installed ASP.NET completely. Please help me, -René

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• Will this increase my Virtual private Server failing rate ?

  - by Spencer Lim

  Will this increase my Virtual private Server failing rate if i :- install Microsoft Window Server 2008 Enterprise install SQL server enterprise 2008 install IIS 7.5 install ASP.Net Mvc 2 install Microsoft Exchange << should live inside MWS2008 ? or standalone without OS? install Team foundation server << should live inside MWS2008 ? or standalone without OS? on one mini VPS with specification of DELL Poweredge R710 shared plan DDR3 ECC RAMs 16GB and -- 1GB for this VPS using DELL PERC 6i raid controller (this thing alone about 1.5k-2k) and the SAS HDD (15K RPM) (146GB) -- 33GB to this VPS each hdd is freaking fast over 300MB read / write possible with proper tuning the motherboard is a DELL and it has twin redundant PSU (870watt 85%eff) its running on Intel Xeon 5502 (Quad Core) x2 so about 8 physical proc (fairly share) is there any ruler to measure for this about one VPS can only install what what what service ? because of my resource is limited =.@ may i know if it is install in this way,maybe it seem like defeat the way of "VPS"... what will happen ? or any guideline on this issue (fully configuring the window server 2008 R2) ? Thx for reply

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• High load average, low CPU and IO (Centos 5.7)

  - by Ben

  A Drupal 7 site with CiviCRM, after running smoothly for a year on a 1&1 VPS suddenly became unresponsive. Now pages eventually load, but can take more than a minute. Looking at resource use in Virtuozzo, the load average carries a warning, and has remained above 1. While I understand this isn't particularly high, this is a change from when the site was working. Here is a typical snapshot of top: top - 03:10:32 up 3:21, 1 user, load average: 1.16, 1.22, 1.30 Tasks: 43 total, 1 running, 42 sleeping, 0 stopped, 0 zombie Cpu(s): 0.1%us, 0.1%sy, 0.1%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 2097152k total, 1015112k used, 1082040k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached CPU idle level never seems to go much below 70%. wa is virtually always at 0. There appears to be lots of free memory. And here is some vmstat output, again showign wa at 0, plenty of free memory, and an idle CPU: procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 2 0 0 1100872 0 0 0 0 2783 23672 0 538 1 0 99 0 0 1 0 0 1100872 0 0 0 0 0 16 0 101754 0 0 100 0 0 0 0 0 1100872 0 0 0 0 0 17 0 103133 0 0 100 0 0 0 0 0 1100872 0 0 0 0 0 1 0 102080 0 0 100 0 0 1 0 0 1100872 0 0 0 0 0 6 0 99881 0 0 100 0 0 0 0 0 1100872 0 0 0 0 0 1 0 105187 0 0 100 0 0 I've spoken to 1&1 but they don't have any ideas as to what could be causing the high load average. Instead they suggested an upgrade :) I've looked for processes that might be causing this, examined MySQL showprocesslist, and restarted the container with no result. Does anyone have more troubleshooting suggestions or insights?

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• Automatically check for Security Updates on CentOS or Scientific Linux?

  - by Stefan Lasiewski

  We have machines running RedHat-based distros such as CentOS or Scientific Linux. We want the systems to automatically notify us if there are any known vulnerabilities to the installed packages. FreeBSD does this with the ports-mgmt/portaudit port. RedHat provides yum-plugin-security, which can check for vulnerabilities by their Bugzilla ID, CVE ID or advisory ID. In addition, Fedora recently started to support yum-plugin-security. I believe this was added in Fedora 16. Scientific Linux 6 did not support yum-plugin-security as of late 2011. It does ship with /etc/cron.daily/yum-autoupdate, which updates RPMs daily. I don't think this handles Security Updates only, however. CentOS does not support yum-plugin-security. I monitor the CentOS and Scientific Linux mailinglists for updates, but this is tedious and I want something which can be automated. For those of us who maintain CentOS and SL systems, are there any tools which can: Automatically (Progamatically, via cron) inform us if there are known vulnerabilities with my current RPMs. Optionally, automatically install the minimum upgrade required to address a security vulnerability, which would probably be yum update-minimal --security on the commandline? I have considered using yum-plugin-changelog to print out the changelog for each package, and then parse the output for certain strings. Are there any tools which do this already?

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• What DBus signal is sent on system suspend?

  - by Paul Robinson

  Hello, I need to detect when a machine is going to sleep in Ubuntu 9.10 and Fedora 13. Both use UPower, so I've been looking on the "org.freedesktop.UPower" DBus bus for such signals. I've been listening for the "sleeping" signal on the UPower bus with the following command: dbus-monitor --system "type='signal',interface='org.freedesktop.UPower',member='Sleeping'" When I sleep the machine (either by closing the lid, selecting "shutdown - suspend" or sending a DBus message) I don't see a "sleeping" event. I notice that the "Sleeping" event is sent when the "org.freedesktop.UPower.AboutToSleep" method is invoked. I can do this manually by calling: dbus-send --print-reply --system --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.AboutToSleep And I notice the "sleeping" signal is fired. My understanding is that anything that sleeps the PC must send the "AboutToSleep" signal before hand. It doesn't seem like this is happening. I've tried these steps on both Fedora 13 and Ubuntu 9.10 and I see the same results. Can anyone explain what's happening or provide me with an alternative DBus signal to listen for? Many thanks, Paul

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• Can not join additional domain controllers

  - by Hosm

  Hi all, I had a dead PDC and another not so synced domain controller for my domain. using comments here link now the so called secondary domain controller has seized domain controls and I can verify it from dsa.msc that it is a domain controller. I set up another domain controller (win2003SRV) and about to promote an AD on it as a domain controller for my domain. When I try to join the new domain controller to the domain I face DNS problem. here is some more detail DNS was successfully queried for the service location (SRV) resource record used to locate a domain controller for domain DOMNAME.A.B: The query was for the SRV record for _ldap._tcp.dc._msdcs.DOMNAME.A.B The following domain controllers were identified by the query: update.DOMNAME.A.B Common causes of this error include: - Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. - Domain controllers registered in DNS are not connected to the network or are not running. For information about correcting this problem, click Help. it is worth noting that update.DOMNAME.A.B is the current domain controller to which I'd like to add another controller named PDC.DOMNAME.A.B Ip address of update.DOMNAME.A.B is 192.168.200.1 and for pdc.DOMNAME.A.B is 192.168.200.100 querying DNS on both machine return correct results. Any idea?

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• Building new computer, turns on, but no post

  - by addybojangles

  Pardon my ignorance here, finally decided to put together a computer and egads. I purchased a new motherboard, power supply, processor, video card and memory. ASUS M4A79XTD EVO AM3 AMD 790X ATX AMD Motherboard OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V SLI Ready 80 PLUS Certified Modular Active PFC Power Supply AMD Phenom II X4 965 Black Edition Deneb 3.4GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket AM3 125W Quad-Core Processor XFX HD-577A-ZNFC Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model F3-12800CL9D-4GBNQ (originally had links for you guys, but I lack the rep, sorry!!) And I've got it all in the tower. I put in power supply, installed processor on motherboard, installed heatsink, put in ram, and I am using an older IDE hard disk. When I start the computer, the monitor tells me "check signal cable." As far as I can tell, the heatsink on the processor is spinning, the power supply is on (obviously), and the green LED on the motherboard is on. I originally only had the bigger output plugged in to the motherboard (what I saw in a YouTube vid as well as the mobo instructions), but after doing some research, it said plug in the other ATX power supply. Which I did. And trying to power the computer results in nothing. No beeps on startup, no post, anyone have any ideas? Your ideas and help is greatly appreciated.

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• Time drift in Cloud Server - need to mainpulate GRUB config

  - by Aditya Advani

  We are hosting a VPS on a popular host and are experiencing a regular time drift of several minutes a day forward (approx 7). Linux Kernel: 2.6.18-164.11.1.el5 GNU/Linux Distro: CentOS release 5.4 (Final) We reached out to our hosting provider and their support advised us " This is a known issue with Cloud Servers. To fix this you will need to add one line to your grub config located at: /boot/grub/menu.lst The line you need to add is: noapic nolapic divider=10 nolapic_timer This should correct this issue. You will need to restart after this is added in. " Because I am wary of manipulating grub, mostly I'm terrified that our server may fail to restart - I ask you guys, the pro *nix admins - where exactly in this file does the recommended insertion below: # line from 1&1 for time syncing issue (Case 5163) noapic nolapic divider=10 nolapic_timer go? Please specify where exactly, and whether the order of commands is or is not important. Why is the block below "title CentOS ..." indented? If someone could give me an overview of how this works or point me to a resource that's easy to follow, that's what I'm looking for immediately, a light overview or basic understanding of what I;m doing. If GRUB and bootloaders are a deep dark treasure trove of kernel hacking or something, that's great well-recommended in-depth resources are also very welcome. This is my current /boot/grub/menu.lst # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file #boot=/dev/sda # serial --unit=0 --speed=57600 terminal --timeout=5 serial console timeout=5 title CentOS (2.6.18-164.11.1.el5) root (hd0,0) kernel /boot/vmlinuz-2.6.18-164.11.1.el5 ro root=/dev/hda1 console=tty0 console=tty initrd /boot/initrd-2.6.18-164.11.1.el5.img MOST IMPORTANT: I need to know where in the file above it is appropriate to paste the suggested line so I can confidently restart my VPS after manipulating GRUB config

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• Puppet: array in parameterized classes VS using resources

  - by Luke404

  I have some use cases where I want to define multiple similar resources that should end up in a single file (via a template). As an example I'm trying to write a puppet module that will let me manage the mapping between MAC addresses and network interface names (writing udev's persistent-net-rules file from puppet), but there are also many other similar usage cases. I searched around and found that it could be done with the new parameterised classes syntax: if implemented that way it should end up being used like this: node { "myserver.example.com": class { "network::iftab": interfaces => { "eth0" => { "mac" => "ab:cd:ef:98:76:54" } "eth1" => { "mac" => "98:76:de:ad:be:ef" } } } } Not too bad, I agree, but it would rapidly explode when you manage more complex stuff (think network configurations like in this module or any other multiple-complex-resources-in-a-single-config-file stuff). In a similar question on SF someone suggested using Pienaar's puppet-concat module but I doubt it could get any better than parameterised classes. What would be really cool and clean in the configuration definition would be something like the included host type, it's usage is simple, pretty and clean and naturally maps to multiple resources that will end up being configured in a single place. Transposed to my example it would be like: node { "myserver.example.com": interface { "eth0": "mac" => "ab:cd:ef:98:76:54", "foo" => "bar", "asd" => "lol", "eth1": "mac" => "98:76:de:ad:be:ef", "foo" => "rab", "asd" => "olo", } } ...that looks much better to my eyes, even with 3x options to each resource. Should I really be passing arrays to parameterised classes, or there is a better way to do this kind of stuff? Is there some accepted consensus in the puppet [users|developers] community? By the way, I'm referring to the latest stable release of the 2.7 branch and I am not interested in compatibility with older versions.

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• Migrate installation from one HDD to another?

  - by dougoftheabaci

  I have a server with a 64 GB SSD inside. It runs just fine, but occasionally there's a hiccup that causes it to nearly fill up. When that happens my server starts to lockup and generally misbehave. I'm looking to buy a bigger SSD (either 128 GB or 256 GB) but I'm a bit unsure of how best to make the transition. For a start, I don't have an external monitor. If I need one I'll have to borrow it from work. Most of the time I just SSH into the server from my iMac. The only solution I can think of would be to buy two FW800 2.5" cases, boot from the 64 GB SSD and clone it to the 128 GB SSD. Seem a bit excessive but it might be my best option. I do have more than one SATA port on my server, but they're all currently being use for storage drives. They don't mount by default, so I could unplug them and just have the two SSDs and do the whole thing via SSH. This is another option I'm considering. My main concern with either is how best to make sure everything goes across. I want a carbon copy of the first one onto the second. This is especially important because I have a ZFS volume (my storage) and I'm a bit unfamiliar with how to move everything across. I could just start fresh and reinstall everything on the SSD, but that seems like extra trouble I don't need. So any advice on how best to achieve my goals would be appreciated. Thanks! Server is running Ubuntu Server 12.04. The iMac has 10.8.1.

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• Windows Update Agent Update Failed

  - by Adrian Godong

  I'm trying to install the latest version of Windows Update Agent, v7.2.6001.788, and the installation failed with error code of 0x800b0100. Running Windows Server 2008 SP1. The relevant WindowsUpdate.log section: 2009-08-03 16:17:49:334 3544 d28 Misc =========== Logging initialized (build: 7.2.6001.788, tz: +0100) =========== 2009-08-03 16:17:49:334 3544 d28 Misc = Process: d:\fcc0f96e893296900e6501a601\wusetup.exe 2009-08-03 16:17:49:332 3544 d28 Setup Windows Update Client standalone setup : resource dll path is d:\fcc0f96e893296900e6501a601\en\wusetup.exe.mui 2009-08-03 16:17:49:335 3544 d28 Setup Evaluating CBS package "d:\fcc0f96e893296900e6501a601\WUClient-SelfUpdate-Core-TopLevel.cab" 2009-08-03 16:17:49:556 3544 d28 Setup Package will be installed 2009-08-03 16:17:49:556 3544 d28 Setup Evaluating CBS package "d:\fcc0f96e893296900e6501a601\WUClient-SelfUpdate-ActiveX.cab" 2009-08-03 16:17:49:580 3544 d28 Setup Package will be installed 2009-08-03 16:17:49:580 3544 d28 Setup Evaluating CBS package "d:\fcc0f96e893296900e6501a601\WUClient-SelfUpdate-Aux-TopLevel.cab" 2009-08-03 16:17:49:665 3544 d28 Setup Package will be installed 2009-08-03 16:17:49:709 3544 d28 Setup Windows Update Client standalone setup : eula file path is d:\fcc0f96e893296900e6501a601\en\eula.rtf 2009-08-03 16:17:52:337 3544 de0 Misc WARNING: LoadLibrary failed for srclient.dll with hr:8007007E 2009-08-03 16:17:52:338 3544 de0 Setup Installing CBS package "d:\fcc0f96e893296900e6501a601\WUClient-SelfUpdate-Core-TopLevel.cab" 2009-08-03 16:17:53:895 3544 de0 Setup WARNING: CBS operation failed, error = 0x800B0100 2009-08-03 16:17:53:898 3544 de0 Setup WARNING: Install of setup package "d:\fcc0f96e893296900e6501a601\WUClient-SelfUpdate-Core-TopLevel.cab" failed, error = 0x800B0100 2009-08-03 16:18:04:976 3544 d28 Setup wusetup has finished. Exit code is 0. Reboot is NOT needed I think something went wrong twhen loading the srclient.dll. Things that I have done and still no fix: msiexec /unregister and msiexec /register regsvr32 wuapi.dll Run CheckSUR tool and restart

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• SNAT through Racoon IPSec VPN

  - by Mite fine d'ailes

  I am trying to route traffic from a device (that I will call "target") connected to my Ubuntu box (that I will call "host") to servers at a remote office. The host uses a Racoon IPSec VPN, connected through a NIC called efix. This creates an aliased IF called efix:0 which has IP adress 192.168.190.132. It is able to reach the servers. The link between host and target is an Ethernet link, using IP adresses 10.0.0.1 on IF eusb for the host and 10.0.0.2 on IF eth0 for the target. I have setup the following routes and iptables entries: On target: 10.0.0.0 * 255.255.255.0 U 0 0 0 eth0 default 10.0.0.1 0.0.0.0 UG 0 0 0 eth0 On host: echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -j SNAT --to 192.168.190.132 iptables -A FORWARD -s 10.0.0.0/24 -j ACCEPT iptables -A FORWARD -d 10.0.0.0/24 -j ACCEPT Using Wireshark to monitor an HTTP GET, I can see SYN packets from the target go all the way to the server, but the server's SYNACK packets stop at the host and are not forwarded to the target. Am I missing something here ? Isn't SNAT supposed to keep track of the connections ?

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• Xen dom0 reports incorrect amount of RAM with dom0_mem set

  - by xen_amnesiac

  I've done a fair bit of searching about this, but have found nothing that answers my question. I have a system with 6GB of RAM which acts as a Xen server. For reference, it runs Ubuntu 12.04. I've set the kernel parameter dom0_mem:512M,max:512M in /etc/default/grub as follows: GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=min:512M,max:512M" I've tried variations of that, with the same result. My question is this: With the above set, the dom0 reports in all applications a RAM amount of 422M. cat /proc/meminfo gives the following: $ cat /proc/meminfo MemTotal: 432472 kB MemFree: 54144 kB Buffers: 17640 kB Cached: 220104 kB SwapCached: 30172 kB Active: 136500 kB Inactive: 167780 kB Active(anon): 6156 kB Inactive(anon): 60516 kB Active(file): 130344 kB Inactive(file): 107264 kB Unevictable: 52 kB Mlocked: 52 kB SwapTotal: 1794044 kB SwapFree: 1682012 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 39572 kB Mapped: 8048 kB Shmem: 136 kB Slab: 44324 kB SReclaimable: 22012 kB SUnreclaim: 22312 kB KernelStack: 1280 kB PageTables: 3840 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 2010280 kB Committed_AS: 329192 kB VmallocTotal: 34359738367 kB VmallocUsed: 313988 kB VmallocChunk: 34359417340 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 524696 kB DirectMap2M: 0 kB top, htop, free -m, and byobu's RAM monitor all report the same amount. At first I thought this was because of the onboard graphics borrowing some memory, but have now switched to a dedicated GPU and it persists. Is this normal behavior, or has something gone amiss? It's just about 100MB of RAM that's "gone", and I have no idea where it went. I understand that it's normal that not all RAM is available for allocation, but does the system really take an amount relatively high to the amount of RAM available?

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• SSD - Tweaks/Recommended Configuration

  - by Miky D

  I've just purchased my first SSD drive (a 32GB MLC from Imation) without doing enough research ahead of time in the spirit of giving the new technology a shot and getting myself up to speed by empirical research rather than reading countless reviews and I'm now at a crossroads. I've built a new server to test the new drive and at first I wanted to test it with Windows Server 2003 R2 x86 but after I loaded the OS on it and it had problems loading the drivers of the motherboard I went to the internet and did more research and the more I read the more I got confused. Finally I decided to try out Windows Server 2008 R2 x64 since it supposedly has certain support for SSD drives inherent in the NT 6.1 core. Indeed I've had much better luck with the new OS and got all the drivers installed but now I still have some questions: Should I set the drive to: IDE Emulation or AHCI in the BIOS? Should I make any other changes in the BIOS (I've read on the internet that Write Through should be changed to Write Back) Should I make any other adjustments in Windows (i.e. Tweaks such as disabling prefetching or disabling the Last Accessed Timestamp on the filesystem) and if so, is there a good/reliable online resource with instructions? I'm so tired of reading through countless online posts which spend 80% of coverage on the history of SSDs and benchmarks and explanations of how SSDs work. I got that, now I'd like to know if there's anything I should actually do to make sure Windows Server 2008 R2 makes good use of the SSD.

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• In Windows 7, why can't I use perfmon against a remote server?

  - by SomeGuy

  I am on Windows 7 and trying to run perfmon against Windows 2003 and Windows 2008 servers. I am running into the same issue with all remote machines. When creating a data collector set, I specify a domain account that is in the administrators group on the remote machines (and "Performance Log Users" and "Performance Monitor Users" to be safe). On the "Available Counters" screen, When I type in a remote computer name, PerfMon locks up for a good 2-3 minutes before I can add any counters. I can then save the collector set. However, when I save it, the go/stop buttons are disabled if I click the set in the left panel, and missing if I click the Data collector set itself in the right panel. See the screens below. I can run data collector sets against my local machine with no problem. I am opening perfmon with my local account in both scenarios. I also have Remote Registry Service started on each remote machine. What is going on?

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• Mystery undeletable file

  - by Hugh Allen

  I can't delete C:\Config.Msi\75ce84f.rbf. it's not readonly, system or hidden it's not in use by another process (according to Process Explorer) the NT security permissions aren't the problem either - I am the owner and have Full Control ; as a double-check, the Effective Permissions tab shows that I have permission to delete. Yet trying to delete the file gives "Access is Denied" from both Explorer and cmd. I can however rename it or move it to another folder on the same drive. I can also read it and Virustotal says it's clean which is what I would expect (it's just a Windows Installer temp file - a copy of some DLL I think). The relevant line from Process Monitor is: 6:52:14.3726983 PM 112 Explorer.EXE SetDispositionInformationFile C:\Config.Msi\75ce84f.rbf CANNOT DELETE Delete: True Write 1232 Background: I'm using XP SP2. I recently repaired my Adobe Reader installation to make it the default browser plugin again instead of Foxit. (there seems to be no UI to do it otherwise?) So the installer did its thing and then asked to reboot. As is my habit when rebooting is inconvenient I declined the offer and ran pendmoves to find out what files the installer had scheduled to move / delete. It wanted to delete two files with .rbf extension (rollback files) located in C:\Config.msi\. (this applies to both even though I've been speaking about one). So I tried to delete them manually and couldn't. Does anyone have any ideas what could be preventing deletion? (and I don't think it's malware even though I'm not running AV at the moment)

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• How To Set Up A Loadbalanced High-Availability Apache Cluster On Windows

  - by bReAd

  Setting up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another “Single Point Of Failure”, we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently. The following setup is proposed: Apache node 1: webserver1.example.com (webserver1) – IP address: 192.168.0.101; Apache document root: /var/www Apache node 2: webserver2.example.com (webserver2) – IP address: 192.168.0.102; Apache document root: /var/www Load Balancer node 1: loadb1.example.com (loadb1) – IP address: 192.168.0.103 Load Balancer node 2: loadb2.example.com (loadb2) – IP address: 192.168.0.104 Virtual IP Address: 192.168.0.105 (used for incoming requests) Currently, there are many solutions for Linux machines and there aren't any on windows. I've tried searching a long time for solutions on Windows platform How do I create the virtual IP in windows and perform monitoring and make the load balancer listen to the virtual IP Address?

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• DRBD on a disk with existing file system that takes all the place

  - by Karolis T.

  I'm currently trying to simulate the environment via XEN. I have installed two debian systems with such FS layout: cltest1:/etc# df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda2 6.0G 417M 5.2G 8% / tmpfs 257M 0 257M 0% /lib/init/rw udev 10M 16K 10M 1% /dev tmpfs 257M 4.0K 257M 1% /dev/shm Host cltest2 is identical. Here's my drbd.conf global { minor-count 1; } resource mysql { protocol C; syncer { rate 10M; # 10 Megabytes } on cltest1 { device /dev/drbd0; disk /dev/xvda2; address 192.168.1.186:7789; meta-disk internal; } on cltest2 { device /dev/drbd0; disk /dev/xvda2; address 192.168.1.187:7789; meta-disk internal; } } I have not created filesystem on drbd0 Starting DRBD via init.d script errors out with: Starting DRBD resources: [ d(mysql) /dev/drbd0: Failure: (114) Lower device is already claimed. This usually means it is mounted. [mysql] cmd /sbin/drbdsetup /dev/drbd0 disk /dev/xvda2 /dev/xvda2 internal --set-defaults --create-device failed - continuing! Running: drbdadm create-md mysql gives: cltest1:/etc# drbdadm create-md mysql md_offset 6442446848 al_offset 6442414080 bm_offset 6442217472 Found ext3 filesystem which uses 6291456 kB current configuration leaves usable 6291228 kB Device size would be truncated, which would corrupt data and result in 'access beyond end of device' errors. You need to either * use external meta data (recommended) * shrink that filesystem first * zero out the device (destroy the filesystem) Operation refused. Command 'drbdmeta /dev/drbd0 v08 /dev/xvda2 internal create-md' terminated with exit code 40 drbdadm aborting As I understand, all of my problems are because I don't have unallocated disk space on xvda2. What are my options besides shrinking FS and connecting a separate physical disk? Can't the meta-data be stored on a file in the local filesystem?

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• VLAN with trunk to avoid broadcast storm in a network with redundant paths

  - by liv2hak

  I have 6 Juniper switches (EX - 2200) connected to each other as shown in the network topology. I have two PC's that I am using PC1 - (used for configuring the 6 switches via minicom) PC2 - to monitor the traffic between the switches via the Ports that are marked with arrows in the diagram. STEP 1: I create a new vlan On Switch 3 (SW3) that includes Port 12 and Port 22. I also assign l3-interface to the vlan (vlan_2) with ip address - 192.168.1.7. Now I plug-in Port 0 of Switch 3 on PC2. Now I try pinging 192.168.1.7 from PC2 (192.168.1.10) I want to know what will happen? My postulation is that I will not be able to ping SW3 from PC2.This is because SW3 (Port 12 and Port 22) is a part of a vlan_2 and vlan_2 logically breaks up broadcast domains and so 192.168.1.7 will not be reachable from 192.168.1.10. Now I have an l3-interface on SW1 with IP 192.168.1.1 using default vlan( vlan-id 0). Similarly I have enabled IP on SW2 - 192.168.1.2 SW3 - 192.168.1.3 SW4 - 192.168.1.4 SW5 - 192.168.1.5 SW6 - 192.168.1.6 all using default vlan. I create VLAN2 with the following configuration SW3 - Port 12,Port 22. SW6 - Port 14 I create VLAN3 with the following configuration SW3 - Port 0 SW6 - Port 0 I also configure a VLAN trunk between SW3 and SW6 using the following commands. edit interfaces ge-0/0/12 set unit 0 family ethernet-switching port-mode trunk edit interfaces ge-0/0/12 set unit 0 family ethernet-switching vlan members all There is a redundant path in the network as the loop between SW3 and SW6 is closed.There is no broadcast storm in the network? What is the reason for this? I have not enabled STP or RSTP.still there is no broadcast storm.what is the reason for this. (Please ignore the CISCO symbol on the switches in the diagram.All swithes are Junper EX 22-00.)

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• ASUS P8B WS - Endless Reboots

  - by tuxGurl

  I am running a Intel XEON 1245 with 4GBx2 Kingston Memory ECC Unbuffered DDR3 on an ASUS P8B WS motherboard. BIOS Version 0904 x64. This system is a little over a month old. It is running Ubuntu 11.10. This evening I found the machine turned off. When I tried to restart it, it would POST and stop at the GRUB screen. When I selected Ubuntu and hit enter within 2-3 seconds the would shutdown and restart. If I stayed at the GRUB screen and did nothing the system would not cut out. I tried booting off a USB stick and again 2-3 seconds after selecting 'Try Ubuntu without Installing' the machine will cut power and reboot. Things I have tried so far: Resetting the BIOS using the on board jumper Resetting the BIOS settings to default Disconnecting all external hardware - except keyboard & monitor Booting with 1 stick of RAM - I tried different single sticks Ensured that onboard EPU and GPU boost switches are in the off position. I am running a Memtest86 right now and it has been running for 38+ minutes. This is not an OS problem or an overheating issue (I have a CoolerMaster HAF Case with 3 fans besides the CPU fan) I am at a loss as to what to try next. I think the BIOS is mis-configured somehow but I don't know what to look for.

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• Setting up a PC for the Kids

  - by Martin Clarke

  I recently finished building a new PC from scratch; and then I decided to treat myself to a new widescreen monitor. I'm left with a bit of a conundrum with what to do with my old box. I'm considering a few options such as a file server, putting Linux on it, putting it elsewhere in the house or giving it to a member of the family and so on. But to be honest, I don't really think it would get much use. I've started thinking about putting together something for my kids. The oldest is coming up on 4 in a couple of months and he's used my PC and Macbook (supervised!) before for playing jigzaw puzzles, babysmash and so forth. He's also uses the computer at his nursery (Kindergarden for North Americans!). So, its got me thinking about setting something up for him (bonus for his brother who is 2). I was wondering what others had done when trying to put together something for their kids? Some points for consideration: Operating System? Software? Anti-virus Internet (probably blocking?) Hardware (I've seen some keyboards designed with kids in mind)

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• Backing up SQL NetApp Snapshots using TSM

  - by WerkkreW

  In our environment we have a 3 node SQL 2005 Cluster which is on NetApp storage. We are currently using SMSQL (NetApp SnapManager for SQL) to take Snapshot backups of the data. This works great, but due to some audit requirements we are also forced to maintain some copies on tape. We have used NDMP in other places across the enterprise but we do not want to use it in this specific instance. Basically what I need to do is, get the most recent snapshot copy of the databases on tape, via Tivoli Storage Manager (TSM). What I have done is, obtained a basic Windows Server 2003 VM with SnapDrive installed, which is SAN attached and zoned to the NetApp, and I have written a batch file to do the following: Mount the latest __RECENT snapshot lun to the host, using a specific drive letter Perform a TSM based incremental backup Dis-mount the LUN This seems to work fine, except sometimes the LUN's do not mount due to some sort of timeout. Also, due to my limited knowledge of windows batch scripting, I have no way to monitor the success or failure of these backups since I do not know how to send a valid return code back to the TSM scheduling service. Is there a more efficient/elegant way to accomplish this without NDMP?

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• Windows 7: Windows Firewall: Logging/Notifying on Outgoing Request Attempts

  - by Maxim Z.

  I'm trying to configure Windows Firewall with Advanced Security to log and tell me when programs are trying to make outbound requests. I previously tried installing ZoneAlarm, which worked wonders for me with this in XP, but now, I'm unable to install ZA on Win7. My question is, is it possible to somehow monitor a log or get notifications when a program tries to do that if I set all outbound connections to auto-block, so that I can then create a specific rule for the program and block it.? Thanks! UPDATE: I've enabled all the logging options available through the Properties windows of the Windows Firewall with Advanced Security Console, but I am only seeing logs in the %systemroot%\system32\LogFiles\Firewall\pfirewall.log file, not in the Event Viewer, as the first answer suggested. However, the logs that I can see only tell me the request's or response's destination IP and whether the connection was allowed or blocked, but it doesn't tell me what executable it comes from. I want to find out the file path of the executable that each blocked request comes from. So far, I haven't been able to.

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