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nexedi
slapos
Commits
2e70b0a3
Commit
2e70b0a3
authored
Oct 03, 2013
by
Cédric de Saint Martin
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KVM SR: Update readme about resilience.
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45260afd
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software/kvm/README.txt
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software/kvm/README.txt
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2e70b0a3
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@@ -16,7 +16,7 @@ The following examples list how to request different possible instances of KVM
Software Release from slap console or command line.
KVM instance (1GB of RAM, 10GB of SSD, one core)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~
Note that the KVM instance will try to request a frontend slave instance in order
to be accessible from IPv4.
...
...
@@ -32,22 +32,43 @@ to be accessible from IPv4.
See the instance-kvm-input-schema.json file for more instance parameters (cpu-count, ram-size, disk-size, etc).
NBD instance
KVM instance (1GB of RAM, 10GB of SSD, one core)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This type of instance will allow to host a disk image that will be used by
any KVM instance.
Note that the KVM instance will try to request a frontend slave instance in order
to be accessible from IPv4.
::
myawesomekvm = request(
software_release=kvm,
partition_reference="My awesome KVM",
partition_parameter_kw={
"nbd-host":"ubuntu-1204.nbd.vifib.net",
}
)
See the instance-kvm-input-schema.json file for more instance parameters (cpu-count, ram-size, disk-size, etc).
Resilient KVM instance
~~~~~~~~~~~~~~~~~~~~~
Like KVM instance, but backed-up (with history) in two places.
::
mynbd = request(
kvm = 'http://git.erp5.org/gitweb/slapos.git/blob_plain/refs/tags/slapos-0.188:/software/kvm/software.cfg'
myresilientkvm = request(
software_release=kvm,
partition_reference="my
nbd
",
software_type="
nbd
",
partition_reference="my
resilientkvm
",
software_type="
kvm-resilient
",
)
Then, if you want one of the two clones to takeover, you need to login into
the hosting machine, go to the partition of the clone, and invoke bin/takeover.
KVM Frontend Master Instance (will host all frontend Slave Instances)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This type of instance will allow to host any frontend slave instance requested
by KVM instances. Slave instances (and thus KVM instance) will be accessible
...
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