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  • How do the Virtual machine network works ?

    - by Arpit
    I wish to know If I am using 2 VM instance on the same setup and I wish to use heavy data flow between the VMs is there any possibility that I get the Timeout (let say I having one timer on the sending end which stops on getting the ack.) I vague question is How network works in VM . I hope I am clear with the question.

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  • Why don't I have write permission to my vmware virtual network device?

    - by Robert Martin
    I want to allow my VMWare machine to force the virtual network it's on into promiscuous mode so I can play around with honeyd. I received an error message that told me to go to http://vmware.com/info?id=161 to allow this behavior. Based on their advice, I did: $ groupadd promiscuous $ cat /etc/group | grep promiscuous promiscuous:x:1002:robert $ usermod -a -G promiscuous robert $ id robert uid=1000(robert) gid=1000(robert) groups=1000(robert),....,1002(promiscuous) $ chgrp newgroup /dev/vmnet8 $ chmod g+rw /dev/vmnet8 $ ls -l /dev/vmnet8 crw-rw---- 1 root promiscuous 119, 8 2012-03-29 10:29 /dev/vmnet8 Looks like I gave RW permission to the promiscuous group, and added myself. Except that VMWare still gives me an error message that says I cannot enter promiscuous mode. To try out the group thing, I tried: $ echo "1" >/dev/vmnet8 bash: /dev/vmnet8: Permission denied That really surprised me: It makes me think that I still haven't properly given myself the correct permissions... What am I missing?

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  • OpenVPN Cloud for Network monitoring

    - by mezgani
    I'm working on a supervision project based on OpenVPN, a good way to send some network traffic through a secure channel to office from there out to the Internet. On office i have an OpenVPN server installed and i need to monitor all branches servers that are behind firewalls. I know that the point to point solution is very easy so we may only install OpenVPN client on node that i need to monitor. In the fact, is there any other issue that could help to supervise all branches DMZ network, without installing the client on each machines.

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  • Is the Cloud ready for an Enterprise Java web application? Seeking a JEE hosting advice.

    - by Jakub Holý
    Greetings to all the smart people around here! I'd like to ask whether it is feasible or a good idea at all to deploy a Java enterprise web application to a Cloud such as Amazon EC2. More exactly, I'm looking for infrastructure options for an application that shall handle few hundred users with long but neither CPU nor memory intensive sessions. I'm considering dedicated servers, virtual private servers (VPSs) and EC2. I've noticed that there is a project called JBoss Cloud so people are working on enabling such a deployment, on the other hand it doesn't seem to be mature yet and I'm not sure that the cloud is ready for this kind of applications, which differs from the typical cloud-based applications like Twitter. Would you recommend to deploy it to the cloud? What are the pros and cons? The application is a Java EE 5 web application whose main function is to enable users to compose their own customized Product by combining the available Parts. It uses stateless and stateful session beans and JPA for persistence of entities to a RDBMS and fetches information about Parts from the company's inventory system via a web service. Aside of external users it's used also by few internal ones, who are authenticated against the company's LDAP. The application should handle around 300-400 concurrent users building their product and should be reasonably scalable and available though these qualities are only of a medium importance at this stage. I've proposed an architecture consisting of a firewall (FW) and load balancer supporting sticky sessions and https (in the Cloud this would be replaced with EC2's Elastic Load Balancing service and FW on the app. servers, in a physical architecture the load-balancer would be a HW), then two physical clustered application servers combined with web servers (so that if one fails, a user doesn't loose his/her long built product) and finally a database server. The DB server would need a slave backup instance that can replace the master instance if it fails. This should provide reasonable availability and fault tolerance and provide good scalability as long as a single RDBMS can keep with the load, which should be OK for quite a while because most of the operations are done in the memory using a stateful bean and only occasionally stored or retrieved from the DB and the amount of data is low too. A problematic part could be the dependency on the remote inventory system webservice but with good caching of its outputs in the application it should be OK too. Unfortunately I've only vague idea of the system resources (memory size, number and speed of CPUs/cores) that such an "average Java EE application" for few hundred users needs. My rough and mostly unfounded estimate based on actual Amazon offerings is that 1.7GB and a single, 2-core "modern CPU" with speed around 2.5GHz (the High-CPU Medium Instance) should be sufficient for any of the two application servers (since we can handle higher load by provisioning more of them). Alternatively I would consider using the Large instance (64b, 7.5GB RAM, 2 cores at 1GHz) So my question is whether such a deployment to the cloud is technically and financially feasible or whether dedicated/VPS servers would be a better option and whether there are some real-world experiences with something similar. Thank you very much! /Jakub Holy PS: I've found the JBoss EAP in a Cloud Case Study that shows that it is possible to deploy a real-world Java EE application to the EC2 cloud but unfortunately there're no details regarding topology, instance types, or anything :-(

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  • One bigger Virtual Machine in Cloud

    - by flyer
    I just setup virtual machines on one hardware with Vagrant (this is just a test environment, not production!). I want to use a Puppet to configure them and next try to setup OpenStack. I am not sure If I am understanding how this should look at the end. Is it possible to have below architecture with OpenStack after all where I will run one Virtual Machine with e.g. 12 cores? ------------------------------- | VM (12c) | ------------------------------- | NOVA | NOVA | NOVA | ------------------------------- | OpenStack | ------------------------------- | VM (4c) | VM (4c) | VM (4c) | ------------------------------- | Bare Metal (8c) | ------------------------------- I need this information to have a bigger picture to continue.

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  • File Not Found error launching Guest OS in a non-administrator user account

    - by ToreTrygg
    Hi, I am running Fusion 2.0.6 (196839) on an iMac running 10.6.2 with 3 user accounts (1 Administrator). I have Fusion set up to share the Guest OS, and it's been working splendidly for nearly a year. Within the Guest OS (Windows XP PRO), there are also 3 user accounts (1 Administrator). Last night I went to back up my VM to an external drive, and to minimize the file size and transfer time, I deleted all Snapshots but the most-recent one. I then backed up the VM externally (28.23 GB). Today, one of my users tried to launch the Guest OS from within her user account, and received the following error message: "File Not Found: Windows XP Pro-000006.vmdk "This file is required to power on this virtual machine. If this file was moved, please provide its new location." My two choices are Cancel and Browse. When I browse, I can locate the Windows XP Pro-000006.vmdk file, which appears to be contained within the VM file (Windows XP Pro.vmwarevm). However, it still won't launch from a non-Admin user account. If I view the package contents of the VM file from the user account, the above file is present and appears to be created upon each launch of the Guest OS. If I go back to my Administrator account on the Mac and then launch Fusion, the Guest OS works perfectly for all 3 user accounts within XP Pro. I have tried to delete the Guest OS from Fusion's Library within the problem user account, then re-connect it to that Library, but the result is the same. The Guest OS data integrity is 100% -- but is accessible only from the OS X Administrator account. This problem only surfaced after deleting several older Snapshots. Again, the data is there, the Guest OS powers up normally in the Mac's Administrator account, but persistently returns the above error when attempting to power on from a non-Admin account on the Mac. I'm not sure how this is affecting the error, but when I look at Hard Disk Settings, the "unable-to-locate" file is the filename of the virtual HD. I don't want to make any changes to my (working) VM without any advice from the knowledgeable people on this forum. Any help will be greatly appreciated, thanks!

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  • Why do I get a My Disney window when installing VMWare Workstation?

    - by Marc Esher
    I'm assuming this is a virus, though my virus checker can't find it. I downloaded the latest vmware workstation 7 installer. I'm running Windows 7 64bit. I go to install it, and the installer window is a Disney website. Upon further investigation, what's happening is that the vmware installer extracts/writes a bunch of files to a temp directory. One of those files is an index.htm file. When I open it, sure enough it's the Disney file. I used sysinternals Process Monitor to look for anything fishy, but the only thing I see touching that index.htm file is the vmware installer and explorer.exe

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  • Accessing vSphere ESX/ESXi server through python

    - by William
    Hi, I'd like to automatically obtain a list or array of the VMs (mac address/name/resource pool) currently created on a vSphere server and use it in a python app. Can someone please suggest a good approach or solution to do this? I'm rather new to the vSphere platform. Thanks.

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  • Does shutdown idle VMs improve the performance?

    - by Samselvaprabu
    Often our team members are coming to me with a compliant that their VMs are slow. Our team members suggested to shutdown some of the VMs temporarily and try to access the VM. But most cases that would not help. Assume that i have assigned 4 GB for and 2 CPUs for my VM. So ideally it should not face performance issue. As our ESXi 4.1 server has multiple VM in the same server (we have overcommited memory and CPU). Does shut down other VM really helps to improve performance or not? [Note : We are using ESXi 4.1 and our hardware is R710 server. We have more number of VMs in single server so we have overcommited memory.]

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  • How is memory allocated in ESXi server?

    - by Samselvaprabu
    We have an ESXi 4.1 server with 48 GB RAM. For each VM, we are allocating 4GB of memory. Since the server will have 13 virtual machines, my manager thinks this is wrong. I am going to explain to them that ESXi will actually manage memory itself, but they asked me how much memory I allocated for the ESXi server itself. I did not allocate any (I have not even heard of an option for allocating memory for the ESXi server itself). How is memory allocated for ESXi server? How does it over-allocate/distribute RAM among virtual machines without issue?

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  • DNS settings for SaaS in the cloud?

    - by Jeremy
    I am building a SaaS product. When a user signs up for an account they must select an alias for their site --------.getlaunchpoint.com. Right now I have an A record *.getlaunchpoint.com that points to the ip address server. However, with Azure I am not given an IP address. The suggested implementation is to make use of a CNAME. I need to create a CNAME for *.getlaunchpoint.com - getlaunchpoint.cloudapp.net GoDaddy does not support CNAME wildcards. Searching on Google I'm getting conflicting information... is CNAME wildcard a bad practice? I run into the same problem with Amazon EC2 if I want to make use of load balancers because you cannot tie a public IP address to an Amazon Load Balancer. Amazon also suggests the use of a CNAME. Any help would be appreciated.

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  • Has anyone managed to virtualise Windows 7 on a physical disk?

    - by Stavros
    I have Windows 7 installed on a partition and running fine, but I want to access them from my Ubuntu installation with VirtualBox. I have created the virtual disk file and everything, but Windows bluescreens after a bit of loading with error 0000007B (it can't find the disk or something). Has anyone managed to solve this problem?

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  • esx5 debian VM vlan setup

    - by Kstro21
    i have a server with ESX5, have a switch with about 20 vlans, this is how setup the trunk port interface GigabitEthernet0/1/1 description ToOper port link-type trunk undo port trunk allow-pass vlan 1 port trunk allow-pass vlan 2 to 14 stp disable ntdp enable ndp enable bpdu enable then, i created a standar switch(sw1) using the vSphere Client, the VLAN ID is set to All (4095), i also created a VM with Debian 6, with a NIC connected to sw1, now, i want to configure this NIC for a selected group of vlans auto vlan10 iface vlan10 inet static address 11.10.1.0 netmask 255.255.255.224 mtu 1500 vlan_raw_device eth0 auto vlan14 iface vlan14 inet static address 11.10.1.65 netmask 255.255.255.248 mtu 1500 vlan_raw_device eth0 so, when i restart the network using /etc/init.d/networking restart, i got this error Reconfiguring network interfaces...SIOCSIFADDR: No such device vlan14: ERROR while getting interface flags: No such device SIOCSIFNETMASK: No such device SIOCSIFBRDADDR: No such device vlan14: ERROR while getting interface flags: No such device SIOCSIFMTU: No such device vlan14: ERROR while getting interface flags: No such device Failed to bring up vlan14. done. this is just part of the error, so, my questions is: is this possible?, i mean, what i'm trying to achieve using ESX Virtual Machines, VLANS, etc is this a Debian problem? can be solved? i've read about a file named z25_persistent-net.rules in Debian but it doesn't exist in my installation. in the In the vSphere Networking for ESX5 guide, you can read: If you enter 0 or leave the option blank, the port group can see only untagged (non-VLAN) traffic. If you enter 4095, the port group can see traffic on any VLAN while leaving the VLAN tags intact. So, in theory, it should work, right? Hope you can help me up with this one Thanks

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  • additional space on microsoft's cloud

    - by Narcolapser
    Question: How do you get more space on Live Mesh/Live Sync? Info: I'm looking into corporate data backs for my company's dealers. each dealership will have data back up demands ranging from 100mb to 20gb. We are an entirely Microsoft solution so when I was asked to look into back ups, of course I would look to Micro$oft. even if we have too buy this space, is there a way to get more space on Live Mesh/Live Sync (Live Mync hehe)? The 5 gb that Mesh provides or the 2gb that Sync provides isn't enough for our larger dealerships. The 25gb that SkyDrive provides is probably enough for now, but I don't know if it will be in the future. However, SkyDrive is not automatically synced. So it isn't a viable option anyway. ~n

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  • arp "who-has tell" on cloned machine

    - by mcmorry
    I have a urgent problem to solve today, but I'm lost. Please help. I've cloned a Virtual Machine hosted on VM Ware ESXi 4.1 The OS is now Ubuntu Server 12.04 LTS, but at the time of cloning it was 10.04 LTS. I fixed the MAC address manually inside /etc/udev/rules.d/70-persistent-net.rules. It is a known problem on Ubuntu. I had to remove the old MAC address and set the new one as eth0. Everything seems to work fine, except ARP. My provider OVH sent me a warning to resolve it today (this is the second day) or they will block my IP! The log contains many lines like this: Tue Jun 5 01:04:29 2012 : arp who-has 178.32.136.212 tell 178.32.136.224 where .224 is the cloned server that is causing problems, and .212 is the cloned one. arp -na returns: ? (178.33.230.254) at 00:07:b4:00:00:02 [ether] on eth0 ? (178.32.136.212) at 00:50:56:09:8e:f1 [ether] on eth0 The first IP is the ESXi machine. The second one should not be there. I'm not an expert and I don't know what else to do to fix this problem. Any help will be very appreciated. Thanks. EDIT: ifcofig on .224: eth0 Link encap:Ethernet HWaddr 00:50:56:01:32:c6 inet addr:178.32.136.224 Bcast:178.32.136.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe01:32c6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:399924 errors:0 dropped:465 overruns:0 frame:0 TX packets:241884 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:58006071 (58.0 MB) TX bytes:663603166 (663.6 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:516216 errors:0 dropped:0 overruns:0 frame:0 TX packets:516216 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:236284275 (236.2 MB) TX bytes:236284275 (236.2 MB) ifconfig on .212: eth0 Link encap:Ethernet HWaddr 00:50:56:09:8e:f1 inet addr:178.32.136.212 Bcast:178.32.136.255 Mask:255.255.255.0 inet6 addr: fe80::250:56ff:fe09:8ef1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:16014 errors:0 dropped:0 overruns:0 frame:0 TX packets:14511 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:15134444 (15.1 MB) TX bytes:2683025 (2.6 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:9944 errors:0 dropped:0 overruns:0 frame:0 TX packets:9944 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1139347 (1.1 MB) TX bytes:1139347 (1.1 MB)

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  • Recommend a Rackspace Cloud Server API Language Binding?

    - by Alex R
    Rackspace publishes only a hard-to-use HTTP and JSON/XML based "API" (they call it an API but it's really a non-standard Web Service without a WSDL). There are dozens of open-source language bindings to choose from. I have tried three of them so far and they're all horrible (incomplete, buggy, and/or undocumented). Can anybody recommend a language binding which is reasonably complete, well documented, and bug-free? I can use Perl, Python, PHP, or Java. My ultimate objective is to create a script/program that will provision a server, launch a process inside it, wait for the process to finish, copy the results to the local server, and destroy the remote server. What's the best choice for that? Thanks

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  • Resource Pool sharing in Hyper-V Virtual Machines

    - by user67905
    I understand that we can install Hyper-V on one server and run a number of Virtual Machines on it, upto the limit of resources of that server. I want to know if it is possible to install Hyper-V lumped on two or more servers, so that the Virtual Machines can use the underlying resources pool of both the servers? And also if that same is possible for an “n” number of servers, instead of just 2 servers.

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  • How secure is cloud computing?

    - by Rhubarb
    By secure, I don't mean the machines itself and access to it from the network. I mean, and I suppose this could be applied to any kind of hosting service, when you put all your intellectual property onto a hosted provider, what happens to the hard disks as they cycle through them? Say I've invested million into my software, and the information and data that I have is valuable, how can I be sure it isn't read off old disks as they're recycled? Is there some kind of standard to look for that ensures a provider is going to use the strictest form of intellectual property protection? Is SAS70 applicable here?

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  • Should I choose KVM/XEN over OpenVZ or use them together?

    - by Krystian
    I've got a dual xeon e5504 server, with [for now] only 8GB of ram. Storage is'n impressive either: 3x 146GB sas in raid5 + 500GB sata drives. Currently it works as a development server, but it's over speced for our needs and since our development methods changed through last 2 years we decided it will work as a production system for some of our applications + we would like to have a separate system for testing/research. Our apps are mainly web apps deployed on tomcats [plural as some of the apps require older versions] and connected to Postgres. I would like to have a production system, where only httpd+tomcat+db are setup and nothing else runs there. Sterile system. Apart from that, I would like a test system, where I can play with different JVM settings, deploy my test apps, play with tomcat/httpd settings and restart them without interfering with the production system. Apart from that, I would like to be able to play with different linux flavors, with newer kernels to test how they work etc. I know, this is not possible with OpenVZ and I would have to choose KVM for that. I am thinking about merging the two, and setting up a KVM to be able to work with different systems [linux only to be frank] + use openVZ to setup separate machines for my development needs. I would simply go with that, but reading here and there about the performance impact full virtualization has over containers and looking at the specs of my server makes me think twice about it. I don't want to loose too much performance, especially because of the nature of my apps [few JVMs running at the same time]. It will be my first time with virtualization, apart from using desktop virtualbox/vmserver. Although I am a fast learner I don't want to mess with the main system so much that it will break the production apps or make them crawl. Although they are more or less internal apps and they don't produce much load, they need to be stable. I've read, that KVM host is a normal linux installation and it allows to run normal processes on it. If that is so, does it allow to run openVZ as well? I mean... can I have KVM and OpenVZ running on the same system/kernel? Or do I have to setup another system to run OpenVZ containers? How much performance impact can this have for me? Will my hardware suffice? oh and one more thing... unfortunately I'm quite limited with the funds... I'm looking for a free solution only :/

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  • How to hide a program that is running on a virtual machine?

    - by Femto Trader
    Some softwares contain tests to see if they are running on a virtual machine. It's very unpleasant to see alert messages such as "Sorry, this application cannot run under a Virtual Machine." and have your software stopped! There is a lot of legal reasons to override such tests. Moreover such limitations are (most of the time) not written in User License Agreement. So... how to hide a program that is running on a virtual machine? I'm using a Virtual Private Server (VPS) with Hyper-V... I'm administrator of the Operating System (Windows 2003) installed on this VPS, not administrator of Hyper-V.

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  • Unable to SSH into ESXi 4.1 host - "Access Denied"

    - by Andrew White
    I am unable to SSH into an existing ESXi server. I have a user which is in the "root" and "users" group and is able to connect via vSphere. However after enabling "Remote support (SSH)", attempting to connect by putty and entering my username/password when prompted I am presented with an "Access Denied" message. I have run through the options presented at this KB article to no avail. I have taken down the firewall on the machine (it is remote) temporarily to check if this helped - no change. The username/password are definitely correct and I can obviously get connectivity if I am presented with the username/password prompt. I am at a bit of a loss what else I can try. Thanks all

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