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https://github.com/containers/podman
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20df2196f2
Also prevent containers with dependencies from being removed from in memory states. SQLite already enforced this via FOREIGN KEY constraints. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #220 Approved by: rhatdan
57 lines
2.2 KiB
Go
57 lines
2.2 KiB
Go
package libpod
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// State is a storage backend for libpod's current state
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type State interface {
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// Close performs any pre-exit cleanup (e.g. closing database
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// connections) that may be required
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Close() error
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// Refresh clears container and pod states after a reboot
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Refresh() error
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// Accepts full ID of container
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Container(id string) (*Container, error)
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// Accepts full or partial IDs (as long as they are unique) and names
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LookupContainer(idOrName string) (*Container, error)
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// Checks if a container with the given ID is present in the state
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HasContainer(id string) (bool, error)
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// Adds container to state
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// If the container belongs to a pod, that pod must already be present
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// in the state when the container is added, and the container must be
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// present in the pod
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AddContainer(ctr *Container) error
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// Removes container from state
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// The container will only be removed from the state, not from the pod
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// which the container belongs to
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RemoveContainer(ctr *Container) error
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// UpdateContainer updates a container's state from the backing store
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UpdateContainer(ctr *Container) error
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// SaveContainer saves a container's current state to the backing store
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SaveContainer(ctr *Container) error
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// ContainerInUse checks if other containers depend upon a given
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// container
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// It returns a slice of the IDs of containers which depend on the given
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// container. If the slice is empty, no container depend on the given
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// container.
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// A container cannot be removed if other containers depend on it
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ContainerInUse(ctr *Container) ([]string, error)
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// Retrieves all containers presently in state
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AllContainers() ([]*Container, error)
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// Accepts full ID of pod
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Pod(id string) (*Pod, error)
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// Accepts full or partial IDs (as long as they are unique) and names
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LookupPod(idOrName string) (*Pod, error)
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// Checks if a pod with the given ID is present in the state
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HasPod(id string) (bool, error)
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// Adds pod to state
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// Only empty pods can be added to the state
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AddPod(pod *Pod) error
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// Removes pod from state
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// Containers within a pod will not be removed from the state, and will
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// not be changed to remove them from the now-removed pod
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RemovePod(pod *Pod) error
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// Retrieves all pods presently in state
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AllPods() ([]*Pod, error)
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}
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