Since yesterday I can't connect through ssh to all of my Debian wheezy instances on my google cloud. I can connect only through the web console. When the web console tries to negotiate the session, there's a message telling me to update the Linux guest environment. But for wheezy, there is no Linux guest environment package.
Do you have any idea to resolve this issue ?
Debian 7 images were deprecated a while a go and as there are no update packages for the Guest Environment, the best approach would be to migrate to Debian 8 or 9.
To access your VMs you might try one of the following options:
1) According to this public issue the old guest environment still work with deprecated keys. If you have an SSH client configured with an old private key, you might still have access to your VMs through it.
2) Accessing the VM via the serial console
3) Mounting, as secondary, the original disk or a copy of it in a VM you do have access to. The steps are very similar to the section “Inspect an instance without shutting it down” on this document". That would allow you to recover your data.
Related
I am trying to deploy a cent-os 7 VM on a vcenetr from pyvmomi python library and then before powering on the VM I am trying to setup static IP and DNS for the VM.
VM creation goes fine , but guest customization fails, givimg following error:
**Customization of the guest operating system 'rhel6_64Guest' is not sup
ported in this configuration. Microsoft Vista (TM) and Linux guests with Logical
Volume Manager are supported only for recent ESX host and VMware Tools versions
. Refer to vCenter documentation for supported configurations."
faultCause =
faultMessage = (vmodl.LocalizableMessage) []
uncustomizableGuestOS = 'rhel6_64Guest'
Now this customization problem goes away if the VM is just rebooted once. After that we can do the guest customization.
But this reboot takes around 30 seconds of time and for our case , we need to get VMs up and running faster than this time.
Any body who faces similar problem and has some context on it will be very helpful.
Also I don't understand how rebooting the VM solves this problem.
Please share your thoughts even if you don't have exact solutions .
On further Investigation I found that open-vm-tools does not work until the VM is powered on atleast once.
When Machine is powered on , the HOST system detects the open-vm-tools running on guest OS , and from there on open-vm-tools works.
So open-vm-tools can not be used for initial provisioning as it will just not work at the start up.
Cloud-init is the alternative solution which should be used for initial provisioning.
I am new to Hadoop and the Big Data world...
I have installed the Hortonworks Sandbox VM in Virtual Box. It's working great...
Can someone tell me how to install Firefox within the VM? I need it to use NIFI
Thanks a lot for any help!
Installing a browser on the VM and using it through VNC will typically be very slow. The best option is to set up an SSH Tunnel and do a local forward. If you use the PuTTy ssh client on windows then you can follow the following instructions on setting up the local forward which will allow you to use your browser on the host operating system to connect to the NIFI instance running in your VM.
I have several servers running centOS 6 and centOS 7. I am working in an inventory system, and for that I am using ohai, which is installed in all the machines.
When I do ssh myuser#myserver.com ohai it returns a json object with all the information but the network section empty.
However, if I ssh into the server and I run ohai I get the proper network attributes.
Someone has any idea what can be happening? Thanks!
I solved, the problem was that ohai needs root rights to check the nics properties.
I need to run some scripts in a windows remote machine from a terminal linux, I've tried using telnet however in the windows machine it's unable and there isn't installed a ssh server. So I need other way to run the command remotely without a graphical interface.
I have the possibility for run the command from a windows machine, however I need to open a SSH Tunnel to see the remote machine, I've used psexec but it didn't work for me.
Do you have access to install software on the remote server?
Your SSH client will not be able to connect to the remote machine unless that machine is running an SSH server to respond to your client's connection request.
There are a number of possible options for SSH servers to run on Windows.
(Google for ssh server windows)
Because SSH gives an external user some access to/control over your server it is designed to be a secure tool. I would therefore recommend using an SSH server which is still actively maintained, and keep it up to date. Servers which are old and no longer supported are are likely to contain known security issues which may never be addressed, thereby leaving your server vulnerable.
There are a number of good free open-source solutions for this, so you shouldn't need to buy anything.
In the past I've worked with Windows machines running Cygwin, with the OpenSSH ssh server installed. Depending how much of the Cygwin system you choose to install, it can make the target Windows host rather like logging into another Linux box in terms of environment.
You can download the installer for Cygwin from http://www.cygwin.com/
I have Windows 7. Installed VirtualBox and Ubuntu 11.04 as guest OS.
Networking is done by NAT.
Everything is fine: I have internet on Ubuntu.
I can access Windows from Ubuntu by its ip.
But i can't access Ubuntu by it's ip which is shown by ifconfig.
I run rails on Ubuntu.
How can I solve this problem: connect to Ubuntu/Rails server on ort 3000 from my Windows?
By default, VirtualBox's NAT allows the virtual machine to access the Internet ; but doesn't allow the physical machine to access the Virtual one.
The simplest solution would be to use another networking setting than NAT, for your Virtual Machine -- for instance, bridge should work fine (your VM would be visible on your network, though).
Another solution would be to use port forwarding ; about that, this article might help : Howto Access via ssh a Virtualbox Guest machine.
I used to struggle with configuring a similar setup until I found Vagrant. Vagrant makes it very simple to setup, connect to and work with a Linux virtual machine. After Vagrant is configured you can just type vagrant ssh to enter the virtual machine and your account has automatic sudo rights and everything works as expected - you don't even have to deal with logging into the vm. The initial setup for ssh does look to be a little more work under Windows though as you need to configure Putty before you can connect.
There is a simple configuration file in Vagrant that you use to specify which ports from the VM you want forwarded to your machine using a syntax like:
config.vm.forward_port("rails", 80, 3000)
config.vm.forward_port("tomcat", 8000, 8080)
and everything is taken care of. Details are here
If, for example, you are using Rails and you start vagrant with the command vagrant up in your Rails project directory than that directory is available on the VM. Since it is the same shared directory between machines, any changes you make in your Rails project directory on your machine using your regular editor is seen on the VM also. This makes testing in other environments very easy.
Instructions for setting Vagrant up with Windows are here and a RailsCast about it is here. Note that Vagrant has nothing to do directly with Rails - you can use it for setup of any virtual machine environment you need.
In short, you can't.
It is a local host not a public domain therefore not publicly accessible outside of your virtualbox environment.
Maybe someone has a clever hack for this but why would you want to do this in the first place?
Your solution is to either use firefox to browse to your localhost within your virtualbox linux session or develop on windows.
Personally I work the other way round I run Ubuntu 11.04 and I have virtualbox installations of xp, 2,000, me, vista and 7 so I can test in different environments. Inevitably I end up sharing my project folder from Ubuntu so that I can run the project in whatever OS I am testing for.