I have a small cloud, configured and set up with SaltStack. The instances are running on Xen right now.
I would like to use oVirt instead, with automatic provisioning of virtual machines (via salt-cloud, I guess).
Apparently, there is no formula for this yet. Also, one cannot just use virsh on the command line or something (oVirt uses its own XML files for configuration and has virsh disabled). There is a REST API for oVirt, but I would prefer something already made before I dive into this and try to make it work with salt.
I have searched for oVirt and salt, but have found almost nothing.
Can I use oVirt with salt-cloud to do automatic provisioning? If so, how?
There doesn't appear to be an oVirt salt cloud driver yet. Here's the list of currently supported clouds:
https://docs.saltstack.com/en/latest/topics/cloud/#cloud-provider-specifics
Related
I have been trying to solve this for the past week.
I'm using the vcenter API to add a new disk to an existing VM
https://vdc-repo.vmware.com/vmwb-repository/dcr-public/1cd28284-3b72-4885-9e31-d1c6d9e26686/71ef7304-a6c9-43b3-a3cd-868b2c236c81/doc/operations/com/vmware/vcenter/vm/hardware/disk.create-operation.html
and as able to do it successfully.
But I cannot figure out how to resize an existing VM disk.
https://vdc-repo.vmware.com/vmwb-repository/dcr-public/1cd28284-3b72-4885-9e31-d1c6d9e26686/71ef7304-a6c9-43b3-a3cd-868b2c236c81/doc/operations/com/vmware/vcenter/vm/hardware/disk.update-operation.html
This disk update operation does not allow to update the "capacity" attribute. So I'm not sure how to resolve this, unless I use an SDK.
Can someone please point me in the right direction?
I'm not 100% up to speed on the latest version, but there are several things that the REST API cannot do compared to the "old" SDK which is based on SOAP / WSDL.
The documentation on the page also states that the call only: "Updates the configuration of a virtual disk. An update operation can be used to detach the existing VMDK file and attach another VMDK file to the virtual machine." So there's no mention of changing the size (which is pretty lame I have to say...).
So I think unfortunately it seems like you either
Wait for a new version and hope this will be included
You use the good old SDK
I'd like to upgrade to the newest version of Perl6,
rakudobrew build moar
Update git reference: rakudo
Cloning into 'rakudo'...
fatal: unable to connect to github.com:
github.com[0: 140.82.114.4]: errno=Connection timed out
Failed running git clone git://github.com/rakudo/rakudo.git rakudo at /home/con/.rakudobrew/bin/rakudobrew line 57.
main::run("git clone git://github.com/rakudo/rakudo.git rakudo") called at /home/con/.rakudobrew/bin/rakudobrew line 397
main::update_git_reference("rakudo") called at /home/con/.rakudobrew/bin/rakudobrew line 368
main::build_impl("moar", undef, "") called at /home/con/.rakudobrew/bin/rakudobrew line 115
this is just a simple connection failure, but how do I fix this?
Your connection problem is not really anything to do with any P6 related software, or in fact any software you're using. It is, as you say, "just a simple connection failure". And most such failures are transient and "fix themselves". As JJ notes, in such scenarios you just wait and then things start working again.
So by the time you read this it'll probably be working for you again without you having fixed anything. But I'm writing an answer anyway with these sections:
Consider not using rakudobrew
Connection problems that "fix themselves"
Connection problems you investigate or fix yourself
Getting around single points of failure
Consider not using rakudobrew
The main purpose of rakudobrew is to support installation of many versions of Rakudo simultaneously and the main audience for the tool is folk hacking on the Rakudo compiler, not those merely using it.
If you're just a regular user, not someone developing the Rakudo compiler and/or don't need to have multiple versions of Rakudo, with complete source code, installed simultaneously, then consider just downloading and installing Rakudo files directly, eg. via rakudo.org/files, rather than via rakudobrew.
Connection problems that "fix themselves"
rakudobrew failed because a git clone ... command failed because the connection with the github.com server timed out.
A server timing out when doing something that usually works using a connection that usually works is likely a transient problem, aka a "please try later" problem.
Transient problems typically "fix themselves" a few seconds, minutes or hours later.
If there's still a problem when you try again, and you want to spend time trying to find out what's going on officially, then look for a status page for that server.
Here are two status pages I know of for github.com:
https://www.githubstatus.com/
https://twitter.com/githubstatus?lang=en-gb.
And for unofficial scuttlebutt I suggest reading the twitter feed.
For me, right now, github.com is working fine and the status page says all systems are go.
So it should now be working for you too.
If it's not, then you can wait longer, or investigate. It you want to investigate, start by looking at the status pages above.
Connection problems you investigate or fix yourself
If github claims it's working fine then there's presumably a problem with your local internet "on-ramp" (your system or your internet service provider's) or somewhere further afield between your on-ramp and the server you're failing to connect to. (You can only know approximately where the server is based on which region of the world administers the IP address the server is associated with at any given moment.)
The next place to look will be places like the internet traffic report; this indicates traffic jams and the like across the planet. (Ignore the visual display, which is broken on some browsers, and click on the links in the table to drill down.)
If it's all green between you and the region that administers the IP address of the server you're failing to connect to, then the next place to turn would be your system's administrator and/or ISP.
Failing that, then perhaps you can ask a question at a sister stackexchange site like serverfault.com or superuser.com.
Getting around single points of failure
Perhaps you were thinking there might be some system redundancy and/or you're interested in that aspect.
P5's ecosystem and its tools are generally mature and limit spofs. This is unlike the ecosystems and tools of most of the other languages out there; so if you've gotten used to the remarkable reliability/availability of CPAN due to its avoidance of spofs, and by extension perlbrew, well, you've been spoiled by P5.
The P6 ecosystem/tool combinations are evolving in the P5 tradition.
For example, the zef package manager automatically connects to CPAN alongside github, and is built to be able to connect to other repos. The ecosystem is partway there to take advantage of this zef capability in that many modules are redundantly hosted on both CPAN and github.
rakudobrew ignores CPAN and assumes use of git repos. It is impressively configurable via its Variables.pm file which includes a %git_repos variable, which could be re-targeted to an alternative git repo site like gitlab. But no one has, to my knowledge, arranged to redundantly copy and update the relevant rakudo files to another git repo site, so this spof-avoidance ability apparently inherent in rakudobrew's code is, afaik, moot for now.
I just created a aws lightsail instance, which includes nodejs under Ubuntu, and it is quickly setup, which looks cool.
However I only find the command line operation. I still cannot find the GUI, as it is uncomfortable to edit file through command line.
Any idea of how can I use GUI on it?
Welcome to the world.
No, You cannot use the GUI/UI to edit the files on the Amazon Lightsail instances. You can connect to the server using winscp software and edit the web root files on your machine.
To edit the files out side web root you have to rely on the editors suggested by David J Eddy
Well, looks like I'm a bit late in answering this question, but yes, there is a way to edit files using a GUI.
To do this, install an FTP client on your own computer (not Lightsail server). Popular examples include FileZilla and Cyberduck, and both have free versions.
Once downloaded, you just type in your Server IP address and link your .pem keychain file (should be downloaded from lightsail.aws.amazon.com).
With this new software, you can edit files from your instance and the file structure on your own computer.
Nope. The Ubuntu flavors used in LightSail are of the 'Server' variety. You may not like the idea of editing via the CLI but, honestly, learn it. VIM, eMacs, Nano, etc. Find an editor you can handle and learn it as well as you can. This will help you much later.
As in the topic.
I wonder since I cannot find this information anywhere and currently I am using a virtual machine (linux) on my vcenter which is cloned and then a special shell script is run on this freshly cloned machine to setup up environment and IP adresses etc.
Maybe I would be able to benefit from templates this way.
I think this will be helpful
https://www.robertparten.com/virtualization/vmware-difference-between-clone-and-template/
Few Differences in my opinion:-
Virtual machine is the running instance while Template is compact copy of VM ( with baseline and factory settings), which can be stored anywhere.
one need to deploy template to make running VM.
one can create copy from both VM and template but in VM you need to clone it and in case of template you need to deploy it.
moving between different setup is easy with template.
Rest are already mentioned in link provided.
But first you need to search on your own and still have doubts than only ask, that's how we all learn.
Happy Learning!
Looking at these two scenarios:
Create a template from your active VM, then deploy from the template.
Deploy from the active VM directly.
As far as I know, there will be no difference in the end result if you run these scenarios in the near future. You'll still have to run a script in order to get your IPs setup, etc.
So what's the difference?
If you mess stuff up with your active VM, change things around or whatever, you lose the ability to deploy from the (good) setup you had.
Once you make a template from your active VM, that configuration is saved as a file on the ESX (or the storage, not 100% sure) and can be re-deployed in the future.
We have developed a somewhat diffuse system for handling component installation and upgrades across server environments in an automated manner. It worked happily on our development environment, but I've run into a new problem I've not seen before when attempting to deploy it to a live environment.
The environment in question comprises ten servers, five each on two different geographical sites and domains. Each server runs a WCF based windows service that allows it to talk to each of the other servers and thus keep a track of what's installed where. To facilitate this process we make use of machine level environment variables - and modifying these obviously means registry changes.
Having got all this set up, my first attempts to use the system to install stuff seemed to work, but on one box in particular I'm getting "Requested registry access is not allowed" errors when the code tries to modify the environment variables. I've googled this, obviously, but there seem to be a variety of different causes and I'm really not sure which are the applicable ones. It doesn't help that this is a live environment and that our system has relatively limited internal logging capability.
The only clue I've got is that the guy who did the install on the development boxes wrote a very patch set of documentation on the process. This includes an instruction to modify the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\LocalAccountTokenFilterPolicy value in the registry and set it to 1. I skipped this during the installation as it looked like a rather dubious security risk. Reading the documentation about this key, it looks relevant but my initial attempts at installing stuff on other boxes without this setting enabled worked fine. Sadly the author went on extended leave over the holidays yesterday and he left no explanation of why this key was needed, so we're a bit in the dark.
Can anyone help us toward the light?
Cheers,
Matt
I've seen this error when code tries to write to the event log using something like EventLog.WriteEntry() and a source that is not a registered event source is specified. When a source is specified that has not previously been registered, it will attempt to register the source, which involves writing to the registry.
I would suggest taking a look at SysInternals Process Monitor:
http://technet.microsoft.com/en-us/sysinternals/bb896645
You can use this to monitor registry access and find out what key you're getting the access denied error on. This may give you some insight as to what is causing the problem.
Essentially he's disabling part of the Remote User Account Control. Without setting the value, Remote UAC strips administrative privileges from account tokens remotely accessing the machine. Yes, it does have security implications. See Description of User Account Control and remote restrictions in Windows Vista for an explanation.