20 lines
684 B
Go
20 lines
684 B
Go
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// Package lock implements a locking mechanism on shared resources to ensure
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// they don't get used at the same time. There needs to be a lock for the following:
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// - VM on Host: A VM must only exist on one host at a time
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// - Storage attached to VM: Block storage can only be attached to one VM at a time
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package lock
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// Locker interface used to lock and unlock Lockable resources
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type Locker interface {
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Lock(Lockable) error
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Unlock(Lockable) error
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}
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// Lockable interface must be attached to lockable resources, such as
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// Virtual Machines, block devices, and host devices that can be attached
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// to virtual machines.
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type Lockable interface {
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Locked() bool
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HeldBy() Locker
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}
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