Add basic skeletons of state handling, containers and pods
Signed-off-by: Matthew Heon <mheon@redhat.com>
This commit is contained in:
Matthew Heon
parent
2850fb60a5
commit
35e951fc8c
5 changed files with 376 additions and 27 deletions
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@ -20,6 +20,7 @@ type RuntimeOption func(*Runtime) error
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// Runtime is the core libpod runtime
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type Runtime struct {
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config *RuntimeConfig
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state State
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store storage.Store
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imageContext *types.SystemContext
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apparmorEnabled bool
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@ -145,45 +146,158 @@ type ContainerFilter func(*Container) bool
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// NewContainer creates a new container from a given OCI config
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func (r *Runtime) NewContainer(spec *spec.Spec, options ...CtrCreateOption) (*Container, error) {
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return nil, ctr.ErrNotImplemented
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r.lock.Lock()
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defer r.lock.Unlock()
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if !r.valid {
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return nil, fmt.Errorf("runtime has already been shut down")
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}
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ctr, err := newContainer(spec)
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if err != nil {
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return nil, err
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}
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for _, option := range options {
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if err := option(ctr); err != nil {
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return nil, errors.Wrapf(err, "error running container create option")
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}
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}
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ctr.valid = true
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if err := r.state.AddContainer(ctr); err != nil {
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// If we joined a pod, remove ourself from it
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if ctr.pod != nil {
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if err2 := ctr.pod.removeContainer(ctr); err2 != nil {
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return nil, errors.Wrapf(err, "error adding new container to state, container could not be removed from pod %s", ctr.pod.ID())
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}
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}
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// TODO: Might be worth making an effort to detect duplicate IDs
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// We can recover from that by generating a new ID for the
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// container
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return nil, errors.Wrapf(err, "error adding new container to state")
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}
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return ctr, nil
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}
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// RemoveContainer removes the given container
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// If force is specified, the container will be stopped first
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// Otherwise, RemoveContainer will return an error if the container is running
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func (r *Runtime) RemoveContainer(c *Container, force bool) error {
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return ctr.ErrNotImplemented
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return errNotImplemented
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}
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// GetContainer retrieves a container by its ID
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func (r *Runtime) GetContainer(id string) (*ctr.Container, error) {
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return nil, ctr.ErrNotImplemented
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func (r *Runtime) GetContainer(id string) (*Container, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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if !r.valid {
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return nil, fmt.Errorf("runtime has already been shut down")
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}
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return r.state.GetContainer(id)
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}
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// HasContainer checks if a container with the given ID is present
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func (r *Runtime) HasContainer(id string) (bool, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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if !r.valid {
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return false, fmt.Errorf("runtime has already been shut down")
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}
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return r.state.HasContainer(id)
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}
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// LookupContainer looks up a container by its name or a partial ID
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// If a partial ID is not unique, an error will be returned
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func (r *Runtime) LookupContainer(idOrName string) (*ctr.Container, error) {
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return nil, ctr.ErrNotImplemented
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func (r *Runtime) LookupContainer(idOrName string) (*Container, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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if !r.valid {
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return nil, fmt.Errorf("runtime has already been shut down")
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}
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return r.state.LookupContainer(idOrName)
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}
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// GetContainers retrieves all containers from the state
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// Filters can be provided which will determine what containers are included in
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// the output. Multiple filters are handled by ANDing their output, so only
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// containers matching all filters are returned
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func (r *Runtime) GetContainers(filters ...ContainerFilter) ([]*ctr.Container, error) {
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return nil, ctr.ErrNotImplemented
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func (r *Runtime) GetContainers(filters ...ContainerFilter) ([]*Container, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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if !r.valid {
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return nil, fmt.Errorf("runtime has already been shut down")
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}
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ctrs, err := r.state.GetAllContainers()
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if err != nil {
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return nil, err
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}
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ctrsFiltered := make([]*Container, 0, len(ctrs))
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for _, ctr := range ctrs {
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include := true
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for _, filter := range filters {
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include = include && filter(ctr)
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}
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if include {
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ctrsFiltered = append(ctrsFiltered, ctr)
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}
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}
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return ctrsFiltered, nil
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}
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// Pod API
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// A PodCreateOption is a functional option which alters the Pod created by
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// NewPod
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type PodCreateOption func(*Pod) error
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// PodFilter is a function to determine whether a pod is included in command
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// output. Pods to be outputted are tested using the function. A true return
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// will include the pod, a false return will exclude it.
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type PodFilter func(*Pod) bool
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// NewPod makes a new, empty pod
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func (r *Runtime) NewPod() (*pod.Pod, error) {
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return nil, ctr.ErrNotImplemented
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func (r *Runtime) NewPod(options ...PodCreateOption) (*Pod, error) {
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r.lock.Lock()
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defer r.lock.Unlock()
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if !r.valid {
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return nil, fmt.Errorf("runtime has already been shut down")
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}
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pod, err := newPod()
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if err != nil {
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return nil, errors.Wrapf(err, "error creating pod")
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}
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for _, option := range options {
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if err := option(pod); err != nil {
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return nil, errors.Wrapf(err, "error running pod create option")
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}
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}
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pod.valid = true
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if err := r.state.AddPod(pod); err != nil {
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return nil, errors.Wrapf(err, "error adding pod to state")
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}
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return nil, errNotImplemented
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}
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// RemovePod removes a pod and all containers in it
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@ -191,24 +305,74 @@ func (r *Runtime) NewPod() (*pod.Pod, error) {
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// Otherwise, RemovePod will return an error if any container in the pod is running
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// Remove acts atomically, removing all containers or no containers
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func (r *Runtime) RemovePod(p *Pod, force bool) error {
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return ctr.ErrNotImplemented
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return errNotImplemented
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}
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// GetPod retrieves a pod by its ID
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func (r *Runtime) GetPod(id string) (*pod.Pod, error) {
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return nil, ctr.ErrNotImplemented
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func (r *Runtime) GetPod(id string) (*Pod, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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if !r.valid {
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return nil, fmt.Errorf("runtime has already been shut down")
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}
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return r.state.GetPod(id)
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}
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// HasPod checks to see if a pod with the given ID exists
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func (r *Runtime) HasPod(id string) (bool, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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if !r.valid {
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return false, fmt.Errorf("runtime has already been shut down")
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}
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return r.state.HasPod(id)
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}
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// LookupPod retrieves a pod by its name or a partial ID
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// If a partial ID is not unique, an error will be returned
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func (r *Runtime) LookupPod(idOrName string) (*pod.Pod, error) {
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return nil, ctr.ErrNotImplemented
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func (r *Runtime) LookupPod(idOrName string) (*Pod, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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if !r.valid {
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return nil, fmt.Errorf("runtime has already been shut down")
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}
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return r.state.LookupPod(idOrName)
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}
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// GetPods retrieves all pods
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// Filters can be provided which will determine which pods are included in the
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// output. Multiple filters are handled by ANDing their output, so only pods
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// matching all filters are returned
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func (r *Runtime) GetPods(filters ...PodFilter) ([]*pod.Pod, error) {
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return nil, ctr.ErrNotImplemented
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func (r *Runtime) GetPods(filters ...PodFilter) ([]*Pod, error) {
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r.lock.RLock()
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defer r.lock.RUnlock()
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if !r.valid {
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return nil, fmt.Errorf("runtime has already been shut down")
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}
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pods, err := r.state.GetAllPods()
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if err != nil {
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return nil, err
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}
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podsFiltered := make([]*Pod, 0, len(pods))
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for _, pod := range pods {
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include := true
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for _, filter := range filters {
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include = include && filter(pod)
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}
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if include {
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podsFiltered = append(podsFiltered, pod)
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}
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}
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return podsFiltered, nil
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}
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