Paul Angus created CLOUDSTACK-9301:
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Summary: Improve CloudStack Networking Documentation
Key: CLOUDSTACK-9301
URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9301
Project: CloudStack
Issue Type: Bug
Security Level: Public (Anyone can view this level - this is the default.)
Components: Doc
Environment: N/A
Reporter: Paul Angus
Priority: Minor
http://docs.cloudstack.apache.org/en/latest/concepts.html#deployment-architecture-overview
Network section is really unclear.
In about Physical Networking there are 4 Traffic types defined Guest,
Management, Public and Storage.
Later on the term "Direct IP range" is used but never defined. "These IPs are
in the same VLAN as the hosts." is added without any explanation of what this
means or how this relates to various traffic types or any statement about what
VLAN the hosts are in or where their addresses come from.
In Advanced Networking it says "The hosts in a pod are assigned private IP
addresses. These are typically RFC1918 addresses."
Is this different than in Basic Networking? Why is it important in Advanced
Networking but not required in Basic. Is it not true for both?
In the next paragraph it says:
"For zones with advanced networking, we recommend provisioning enough private
IPs for your total number of customers, plus enough for the required CloudStack
System VMs.
Typically, about 10 additional IPs are required for the System VMs."
How is this different in Basic Network?
What has the importance of "customers"? They are never defined or mentioned
earlier and has no relationship to physical hosts as near as I can tell from my
understanding of "customers" and "hosts".
I am not sure how one decides if you are "typical" or what would make your
situation require more or less.
Perhaps it should be a bit more definite "Allow at least 10 IPS for the SYSTEM
VMs unless you xxx xxx xxx in which case you will need on for each yyy"
System VMs are very poorly defined earlier in the Traffic type section.
"system VMs (VMs used by CloudStack to perform various tasks in the cloud), and
any other component that communicates directly with the CloudStack Management
Server. You must configure the IP range for the system VMs to use."
"Various tasks " could hardly be more vague. Surely someone must have a list or
a count with a link to the reference section.
The last sentence about assigning IP addresses System VMs is confusing in a
paragraph about Traffic Types and should be omitted since it will be discussed
later when IP addresses are discussed.
It seems to me that there should be a reorganization of this section with a
clear statement of all the things that are true for both Basic and Advanced
with careful attention paid to vocabulary and proper definition of new
buzzwords as they are added.
Then differentiate the handling of Basic vs Advanced in 2 sections that are
clearly written in a parallel structure and sequence so it is easy to see what
the difference is.
This is an important section and should be an overview.
There are too many references to exceptions related to specific hardware or
hypervisors.
If these have to be in the overview, they should be as footnotes or special
sections at the end of the overview.
Some simple diagrams should be included to make the network topology and IP
address assignments clearer.
Networking is an important part of Cloudstack and is the source of a lot more
confusion that the hierarchy of hosts to region which include 4 diagrams.
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