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authorMatthew Heon <matthew.heon@gmail.com>2017-11-01 11:24:59 -0400
committerMatthew Heon <matthew.heon@gmail.com>2017-11-01 11:24:59 -0400
commita031b83a09a8628435317a03f199cdc18b78262f (patch)
treebc017a96769ce6de33745b8b0b1304ccf38e9df0 /libpod/pod.go
parent2b74391cd5281f6fdf391ff8ad50fd1490f6bf89 (diff)
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Initial checkin from CRI-O repo
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Diffstat (limited to 'libpod/pod.go')
-rw-r--r--libpod/pod.go137
1 files changed, 137 insertions, 0 deletions
diff --git a/libpod/pod.go b/libpod/pod.go
new file mode 100644
index 000000000..48a761d57
--- /dev/null
+++ b/libpod/pod.go
@@ -0,0 +1,137 @@
+package libpod
+
+import (
+ "sync"
+
+ "github.com/docker/docker/pkg/stringid"
+ "github.com/pkg/errors"
+)
+
+// Pod represents a group of containers that may share namespaces
+type Pod struct {
+ id string
+ name string
+
+ containers map[string]*Container
+
+ valid bool
+ lock sync.RWMutex
+}
+
+// ID retrieves the pod's ID
+func (p *Pod) ID() string {
+ return p.id
+}
+
+// Name retrieves the pod's name
+func (p *Pod) Name() string {
+ return p.name
+}
+
+// Creates a new pod
+func newPod() (*Pod, error) {
+ pod := new(Pod)
+ pod.id = stringid.GenerateNonCryptoID()
+ pod.name = pod.id // TODO generate human-readable name here
+
+ pod.containers = make(map[string]*Container)
+
+ return pod, nil
+}
+
+// Adds a container to the pod
+// Does not check that container's pod ID is set correctly, or attempt to set
+// pod ID after adding
+func (p *Pod) addContainer(ctr *Container) error {
+ p.lock.Lock()
+ defer p.lock.Unlock()
+ ctr.lock.Lock()
+ defer ctr.lock.Unlock()
+
+ if !p.valid {
+ return ErrPodRemoved
+ }
+
+ if !ctr.valid {
+ return ErrCtrRemoved
+ }
+
+ if _, ok := p.containers[ctr.ID()]; ok {
+ return errors.Wrapf(ErrCtrExists, "container with ID %s already exists in pod %s", ctr.ID(), p.id)
+ }
+
+ p.containers[ctr.ID()] = ctr
+
+ return nil
+}
+
+// Removes a container from the pod
+// Does not perform any checks on the container
+func (p *Pod) removeContainer(ctr *Container) error {
+ p.lock.Lock()
+ defer p.lock.Unlock()
+
+ if !p.valid {
+ return ErrPodRemoved
+ }
+
+ if _, ok := p.containers[ctr.ID()]; !ok {
+ return errors.Wrapf(ErrNoSuchCtr, "no container with id %s in pod %s", ctr.ID(), p.id)
+ }
+
+ delete(p.containers, ctr.ID())
+
+ return nil
+}
+
+// Start starts all containers within a pod that are not already running
+func (p *Pod) Start() error {
+ return ErrNotImplemented
+}
+
+// Stop stops all containers within a pod that are not already stopped
+func (p *Pod) Stop() error {
+ return ErrNotImplemented
+}
+
+// Kill sends a signal to all running containers within a pod
+func (p *Pod) Kill(signal uint) error {
+ return ErrNotImplemented
+}
+
+// HasContainer checks if a container is present in the pod
+func (p *Pod) HasContainer(id string) (bool, error) {
+ p.lock.RLock()
+ defer p.lock.RUnlock()
+
+ if !p.valid {
+ return false, ErrPodRemoved
+ }
+
+ _, ok := p.containers[id]
+
+ return ok, nil
+}
+
+// GetContainers retrieves the containers in the pod
+func (p *Pod) GetContainers() ([]*Container, error) {
+ p.lock.RLock()
+ defer p.lock.RUnlock()
+
+ if !p.valid {
+ return nil, ErrPodRemoved
+ }
+
+ ctrs := make([]*Container, 0, len(p.containers))
+ for _, ctr := range p.containers {
+ ctrs = append(ctrs, ctr)
+ }
+
+ return ctrs, nil
+}
+
+// Status gets the status of all containers in the pod
+// TODO This should return a summary of the states of all containers in the pod
+func (p *Pod) Status() error {
+ return ErrNotImplemented
+}