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20

Mnn, you're not really confusing things, or at least you're not more confused than many other people are about "cloud computing". Cloud computing (CC) has become one of those trend-words, fashionable words that get used in lots of different circumstances. To me, cloud computing just implies a service somewhere between Infrastructure as a Service and ...


10

I just wanted to throw this out there, as in my other answer to a Cloud hosting question: "Cloud hosting" is just a re-branded VPS, most cloud solutions scale in no way. You could argue this on several points, but this is what it boils down to. The one thing that I have seen more and more "Cloud" providers offer is instant provisioning of servers - this ...


8

If you want to be discreet, just have the webserver identify itself in a Server: response header (RFC 2616 Sec 14.38). For example, in Apache, the information returned in that header is controlled by the ServerTokens directive. Then, it's just a matter of inspecting the response headers in Firebug, Chrome DevTools, or Safari Web Inspector timeline. If you ...


7

You can use the domain name as usual but override the resolver like so: curl -v --resolve subdomain.example.com:443:x.x.x.x https://subdomain.example.com/ It might be awkward to maintain a lot of such mappings though. You might prefer to just ignore the cert mismatch: curl --insecure https://subdomain.example.com/ IF you want, you could use --insecure ...


6

You should let Google handle the mail reception / sending if your cloud should not take care of it. The MX DNS type is specific to mail and conveniently indicates (with priorities) which server will actually handle mail reception for a given domain. Thus avoiding the need to specify a mail server / subdomain. But it may work also without the mail. prefix, ...


6

I work for Rackspace, and I can help. Take a look at Cloudfuse (https://github.com/redbo/cloudfuse). It enables you to mount your Cloud Files container as a volume for storage and retrieval of static content. There's a good tutorial at http://sandeepsidhu.wordpress.com/2011/03/07/mounting-cloud-files-using-cloudfuse-into-ubuntu-10-10-v2/. It's important ...


6

Some security defenses: OSSEC IPtables firewall (white list instead of blacklist) SSL for phpmyadmin and certain other pages where you use login data Virus scanner like ClamAV update your machines daily The first one is a well documented Intrusion Detection System the second one is a tool to make firewall rules, it runs on top of netfilter. Backups ...


6

You need IPsec, but not in Tunnel (VPN) mode. You want to use IPsec in transport mode. Microsoft makes this comparatively easy to set up and manage servers with the combination of Active Directory group policy and certificate services. On *nix... you've got quite a bit of scripting to do, and lots of reading.


5

You can use the "s3cmd" utility with the "sync" option, although I stumbled on your question because I'm trying to figure out if this syncing mechanism is screwing up my duplicity backups.


5

Our support team can help you determine whether this is expected for your account - http://www.rackspace.com/support/. Thanks! Jeremy Wasner Rackspace Hosting


5

There is a chance that this space is reserved for root user. Please check out how much space is reserved for root,with: tune2fs -l /dev/xvda1 This will give you the block count reserved for root user, multiply it by the block size and you will get the size of reserved space (in bytes). You can modify the reserved space with: tune2fs -m 1 /dev/xvda1 ...


4

I was having the same problem so I whipped up a little program specifically designed to mirror one S3 bucket to another; I call it s3s3mirror. I did try the "s3cmd sync" approach first, but I had a bucket with hundreds of thousands of objects in it, and "s3cmd sync" just sat there, not doing anything but consuming more and more memory until my system died. ...


4

Most 'cloud' providers give you IaaS. That means that you get a set of virtual machines that you're free to manage at will. In short, these are just VPS services, with the added facility of an API to create new servers when you want. Sometimes you can tie that API to some simple metrics (CPU load, traffic, etc), making it a little easier. But it's not ...


4

If what you get after putting the .tar.gz back together and unpacking it results in a disk image, then you should be able to recover files from it. To begin with, for best results you should be working from a Linux system, with plenty of drive space available (50GB or more). I'm not sure if this is even possible with Windows. First put the file back ...


4

Choose option 2 and then use a rackspace loadbalancer that does the following: If varnish cache is up and alive direct all traffic to the varnish instance If varnish is down load balance between the two remaining webservers This prevents you from building a single point of failure but you need a reliable healthcheck in your loadbalancer configuration.


4

You would always backup your files. A CDN keeps a cached copy of your static files at various points on the internet to facilitate a faster load time, but this cache is ephemeral and usually you can't access it or the history of it directly. It is definitely not a substitute for proper backups.


4

There isn't a way to download the server images currently. What you can do right now is create an image of your server (which gets stored in the Saved Images section), then restore the image from there. This isn't what you're asking for, but that's the limit right now. The image storing is part of OpenStack projects called Glance and OpenStack Swift (...


3

Two lists of IaaS providers: www.cloudorado.com - it is actually a price comparison for cloud computing, but could be limited to a list of providers www.cloudharmony.com - they also provide benchmark for subset of the list


3

Since you're using HTTP between your instances the simple solution to prevent any potential snooping of your data on the wire is to switch to HTTPS. It's designed to allow secure communication over an untrusted network, which is exactly what you've got with the shared private Rackspace network. Here are some Ubuntu docs to get you started: https://help....


3

Calculating cloud-costs is simple on the surface, but complex once you get to the spread-sheets. The simple part is you need to know 5 things: How many servers you need What their duty cycle is (probably 24/7 from the sounds of it) What kind of IO you do How much space you consume What kind of bandwidth you need to the internet (or VPC if you're doing ...


3

Which word in the sentence Please contact your Internet service provider since part of their network is on our block list. didn't you understand? Contact Rackspace and bother them. Then contact Hotmail and bother them. Or better: Let Hotmail talk with Rackspace. How can we mediate between those two parties?


3

errno 12 does indeed mean Cannot allocate memory, so you are running out of memory somehow. You should reduce your virtual machine's memory consumption or give it more memory.


3

I'll make this a new answer, since it's going in quite a different direction. In fact it doesn't answer the question as posed, but is perhaps the direction the OP should be looking. The usual configuration when using a load balancer is that the SSL certificate doesn't live on the web server at all, but rather the SSL is handed off to the load balancer. ...


3

Your server's HTTP access logs should show you what their scan did. That's the first place you should be looking. It ought to stick out as a major anomaly, in contrast with your normal logs. I am a little concerned when you say they scanned your "domain". Presumably they resolved a hostname in your domain to an IP address and scanned that. It would be ...


3

They also provide a way to create your own private network and attach your server to it. As explained KB Article ID: 2163. If you did that and had the servicenet connected interface removed, it would no longer be an issue. However, the caveat to this would be that you would no longer have a way to utilize servicenet related services. More on intricacies ...


2

Check out Jungle Disk Server. It works with both Amazon S3 and Rackspace Cloud Files. You could mount S3 and CF in different locations on your filesystem and then use rsync between the two.


2

We use Rackspace Server Backup (a.k.a JungleDisk Server backup), which like Duplicity does local dedupe and compression and then uploads "chunks" via HTTP to a cloud provider. We saw some performance issues, and the underlying reason was our provisioning points for cloud files vs. cloud servers were different. Our cloud servers were being created in the DFW ...


2

Maybe not a full answer, more a suggestion. Could you not set up an Amazon EC2 instance that continually mirrored (or trailed by a few minutes) the main DB servers. Then you could run backups off that EC2 instance directly to S3 and get faster transfer speeds, as well as reducing the load on your primary DB machines. Although 15 hours for 9GB is, if my ...


2

Rackspace is making efforts to improve the control panel but in the meantime, you can use the newly announced DNS API to add TXT/SPF records. Check out the Rackspace blog post. I also wrote a tutorial on using curl to use the API.



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