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package libkpod
import (
"fmt"
cstorage "github.com/containers/storage"
"github.com/pkg/errors"
"github.com/projectatomic/libpod/libkpod/sandbox"
"github.com/projectatomic/libpod/oci"
"github.com/projectatomic/libpod/pkg/registrar"
)
// GetStorageContainer searches for a container with the given name or ID in the given store
func (c *ContainerServer) GetStorageContainer(container string) (*cstorage.Container, error) {
ociCtr, err := c.LookupContainer(container)
if err != nil {
return nil, err
}
return c.store.Container(ociCtr.ID())
}
// GetContainerTopLayerID gets the ID of the top layer of the given container
func (c *ContainerServer) GetContainerTopLayerID(containerID string) (string, error) {
ctr, err := c.GetStorageContainer(containerID)
if err != nil {
return "", err
}
return ctr.LayerID, nil
}
// GetContainerRwSize Gets the size of the mutable top layer of the container
func (c *ContainerServer) GetContainerRwSize(containerID string) (int64, error) {
container, err := c.store.Container(containerID)
if err != nil {
return 0, err
}
// Get the size of the top layer by calculating the size of the diff
// between the layer and its parent. The top layer of a container is
// the only RW layer, all others are immutable
layer, err := c.store.Layer(container.LayerID)
if err != nil {
return 0, err
}
return c.store.DiffSize(layer.Parent, layer.ID)
}
// GetContainerRootFsSize gets the size of the container's root filesystem
// A container FS is split into two parts. The first is the top layer, a
// mutable layer, and the rest is the RootFS: the set of immutable layers
// that make up the image on which the container is based
func (c *ContainerServer) GetContainerRootFsSize(containerID string) (int64, error) {
container, err := c.store.Container(containerID)
if err != nil {
return 0, err
}
// Ignore the size of the top layer. The top layer is a mutable RW layer
// and is not considered a part of the rootfs
rwLayer, err := c.store.Layer(container.LayerID)
if err != nil {
return 0, err
}
layer, err := c.store.Layer(rwLayer.Parent)
if err != nil {
return 0, err
}
size := int64(0)
for layer.Parent != "" {
layerSize, err := c.store.DiffSize(layer.Parent, layer.ID)
if err != nil {
return size, errors.Wrapf(err, "getting diffsize of layer %q and its parent %q", layer.ID, layer.Parent)
}
size += layerSize
layer, err = c.store.Layer(layer.Parent)
if err != nil {
return 0, err
}
}
// Get the size of the last layer. Has to be outside of the loop
// because the parent of the last layer is "", andlstore.Get("")
// will return an error
layerSize, err := c.store.DiffSize(layer.Parent, layer.ID)
return size + layerSize, err
}
// GetContainerFromRequest gets an oci container matching the specified full or partial id
func (c *ContainerServer) GetContainerFromRequest(cid string) (*oci.Container, error) {
if cid == "" {
return nil, fmt.Errorf("container ID should not be empty")
}
containerID, err := c.ctrIDIndex.Get(cid)
if err != nil {
return nil, fmt.Errorf("container with ID starting with %s not found: %v", cid, err)
}
ctr := c.GetContainer(containerID)
if ctr == nil {
return nil, fmt.Errorf("specified container not found: %s", containerID)
}
return ctr, nil
}
func (c *ContainerServer) getSandboxFromRequest(pid string) (*sandbox.Sandbox, error) {
if pid == "" {
return nil, fmt.Errorf("pod ID should not be empty")
}
podID, err := c.podIDIndex.Get(pid)
if err != nil {
return nil, fmt.Errorf("pod with ID starting with %s not found: %v", pid, err)
}
sb := c.GetSandbox(podID)
if sb == nil {
return nil, fmt.Errorf("specified pod not found: %s", podID)
}
return sb, nil
}
// LookupContainer returns the container with the given name or full or partial id
func (c *ContainerServer) LookupContainer(idOrName string) (*oci.Container, error) {
if idOrName == "" {
return nil, fmt.Errorf("container ID or name should not be empty")
}
ctrID, err := c.ctrNameIndex.Get(idOrName)
if err != nil {
if err == registrar.ErrNameNotReserved {
ctrID = idOrName
} else {
return nil, err
}
}
return c.GetContainerFromRequest(ctrID)
}
// LookupSandbox returns the pod sandbox with the given name or full or partial id
func (c *ContainerServer) LookupSandbox(idOrName string) (*sandbox.Sandbox, error) {
if idOrName == "" {
return nil, fmt.Errorf("container ID or name should not be empty")
}
podID, err := c.podNameIndex.Get(idOrName)
if err != nil {
if err == registrar.ErrNameNotReserved {
podID = idOrName
} else {
return nil, err
}
}
return c.getSandboxFromRequest(podID)
}
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