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very different Propellor.Property.ControlHeir.
Rethought it because it turned out that propigating the PrivData rendered
the loop detection pointless, because when there was a loop, each host
included the other's PrivData, which in turn lead to a loop. And, it was
not possible to break that loop.
So, changed from adding properties to hosts to a top-down hierarchy
that makes changes as needed when applied to the hosts.
Which makes it easy to detect and break loops.
Aka: The Ur Quan know what they're up to.
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Controlling host inherits the privdata for the host it spins, and sends it
along to that host.
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This makes Show Info work, and simplifies the implementation.
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If someone wants to make a container be a controller, that should work,
and it should then detect loops that loop back to the container's host.
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Much less invasive than the other implementation.
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* Ssh.keyImported is replaced with Ssh.userKeys. (API change)
The new property only gets the private key from the privdata; the
public key is provided as a parameter, and so is available as
Info that other properties can use.
* Ssh.keyImported' is renamed to Ssh.userKeyAt, and also changed
to only import the private key from the privdata. (API change)
* While Ssh.keyImported and Ssh.keyImported' avoided updating existing
keys, the new Ssh.userKeys and Ssh.userKeyAt properties will
always update out of date key files.
* Ssh.pubKey renamed to Ssh.hostPubKey. (API change)
This makes eg, setting up ssh for spin controllers work better.
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controller of other hosts.
The hard part of this is avoiding loops of controllers. To make that work,
a ControllerChain is passed to the host that's spun, and is added to the
Info of the host being spun, where the controller property can check it
to detect an avoid a loop.
That needed an expansion of the CmdLine data type. I made the new
ControlledRun only be used when there is a ControllerChain provided.
This avoids breaking backwards compatability with old propellor
deployments, as --spin still uses SimpleRun.
Note: Making an old propellor deployment be controlled by a controller
won't work until it's been updated to this commit, so it knows about
the ControlledRun parameter.
(Untested)
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