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package libnetwork
import (
"context"
"fmt"
"strings"
"github.com/containerd/log"
"github.com/docker/docker/libnetwork/datastore"
"github.com/docker/docker/libnetwork/scope"
)
func (c *Controller) initStores() error {
if c.cfg == nil {
return nil
}
var err error
c.store, err = datastore.New(c.cfg.Scope)
if err != nil {
return err
}
return nil
}
func (c *Controller) closeStores() {
if store := c.store; store != nil {
store.Close()
}
}
func (c *Controller) getStore() *datastore.Store {
return c.store
}
func (c *Controller) getNetworkFromStore(nid string) (*Network, error) {
for _, n := range c.getNetworksFromStore(context.TODO()) {
if n.id == nid {
return n, nil
}
}
return nil, ErrNoSuchNetwork(nid)
}
func (c *Controller) getNetworks() ([]*Network, error) {
var nl []*Network
store := c.getStore()
if store == nil {
return nil, nil
}
kvol, err := store.List(&Network{ctrlr: c})
if err != nil && err != datastore.ErrKeyNotFound {
return nil, fmt.Errorf("failed to get networks: %w", err)
}
for _, kvo := range kvol {
n := kvo.(*Network)
n.ctrlr = c
ec := &endpointCnt{n: n}
err = store.GetObject(ec)
if err != nil && !n.inDelete {
log.G(context.TODO()).Warnf("Could not find endpoint count key %s for network %s while listing: %v", datastore.Key(ec.Key()...), n.Name(), err)
continue
}
n.epCnt = ec
if n.scope == "" {
n.scope = scope.Local
}
nl = append(nl, n)
}
return nl, nil
}
func (c *Controller) getNetworksFromStore(ctx context.Context) []*Network { // FIXME: unify with c.getNetworks()
var nl []*Network
store := c.getStore()
kvol, err := store.List(&Network{ctrlr: c})
if err != nil {
if err != datastore.ErrKeyNotFound {
log.G(ctx).Debugf("failed to get networks from store: %v", err)
}
return nil
}
kvep, err := store.Map(datastore.Key(epCntKeyPrefix), &endpointCnt{})
if err != nil && err != datastore.ErrKeyNotFound {
log.G(ctx).Warnf("failed to get endpoint_count map from store: %v", err)
}
for _, kvo := range kvol {
n := kvo.(*Network)
n.mu.Lock()
n.ctrlr = c
ec := &endpointCnt{n: n}
// Trim the leading & trailing "/" to make it consistent across all stores
if val, ok := kvep[strings.Trim(datastore.Key(ec.Key()...), "/")]; ok {
ec = val.(*endpointCnt)
ec.n = n
n.epCnt = ec
}
if n.scope == "" {
n.scope = scope.Local
}
n.mu.Unlock()
nl = append(nl, n)
}
return nl
}
func (n *Network) getEndpointFromStore(eid string) (*Endpoint, error) {
store := n.ctrlr.getStore()
ep := &Endpoint{id: eid, network: n}
err := store.GetObject(ep)
if err != nil {
return nil, fmt.Errorf("could not find endpoint %s: %w", eid, err)
}
return ep, nil
}
func (n *Network) getEndpointsFromStore() ([]*Endpoint, error) {
var epl []*Endpoint
store := n.getController().getStore()
kvol, err := store.List(&Endpoint{network: n})
if err != nil {
if err != datastore.ErrKeyNotFound {
return nil, fmt.Errorf("failed to get endpoints for network %s: %w",
n.Name(), err)
}
return nil, nil
}
for _, kvo := range kvol {
ep := kvo.(*Endpoint)
epl = append(epl, ep)
}
return epl, nil
}
func (c *Controller) updateToStore(kvObject datastore.KVObject) error {
cs := c.getStore()
if cs == nil {
return fmt.Errorf("datastore is not initialized")
}
if err := cs.PutObjectAtomic(kvObject); err != nil {
if err == datastore.ErrKeyModified {
return err
}
return fmt.Errorf("failed to update store for object type %T: %v", kvObject, err)
}
return nil
}
func (c *Controller) deleteFromStore(kvObject datastore.KVObject) error {
cs := c.getStore()
if cs == nil {
return fmt.Errorf("datastore is not initialized")
}
retry:
if err := cs.DeleteObjectAtomic(kvObject); err != nil {
if err == datastore.ErrKeyModified {
if err := cs.GetObject(kvObject); err != nil {
return fmt.Errorf("could not update the kvobject to latest when trying to delete: %v", err)
}
log.G(context.TODO()).Warnf("Error (%v) deleting object %v, retrying....", err, kvObject.Key())
goto retry
}
return err
}
return nil
}
func (c *Controller) networkCleanup() {
for _, n := range c.getNetworksFromStore(context.TODO()) {
if n.inDelete {
log.G(context.TODO()).Infof("Removing stale network %s (%s)", n.Name(), n.ID())
if err := n.delete(true, true); err != nil {
log.G(context.TODO()).Debugf("Error while removing stale network: %v", err)
}
}
}
}
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