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// +build linux
package libpod
import (
"bytes"
"encoding/json"
"path/filepath"
"github.com/boltdb/bolt"
"github.com/containers/storage"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// parseNetNSBoltData sets ctr.state.NetNS, if any, from netNSBytes.
// Returns true if the data is valid.
func parseNetNSBoltData(ctr *Container, netNSBytes []byte) bool {
// The container may not have a network namespace, so it's OK if this is
// nil
if netNSBytes != nil {
nsPath := string(netNSBytes)
netNS, err := joinNetNS(nsPath)
if err == nil {
ctr.state.NetNS = netNS
} else {
logrus.Errorf("error joining network namespace for container %s", ctr.ID())
return false
}
}
return true
}
func (s *BoltState) getContainerFromDB(id []byte, ctr *Container, ctrsBkt *bolt.Bucket) error {
valid := true
ctrBkt := ctrsBkt.Bucket(id)
if ctrBkt == nil {
return errors.Wrapf(ErrNoSuchCtr, "container %s not found in DB", string(id))
}
if s.namespaceBytes != nil {
ctrNamespaceBytes := ctrBkt.Get(namespaceKey)
if !bytes.Equal(s.namespaceBytes, ctrNamespaceBytes) {
return errors.Wrapf(ErrNSMismatch, "cannot retrieve container %s as it is part of namespace %q and we are in namespace %q", string(id), string(ctrNamespaceBytes), s.namespace)
}
}
configBytes := ctrBkt.Get(configKey)
if configBytes == nil {
return errors.Wrapf(ErrInternal, "container %s missing config key in DB", string(id))
}
stateBytes := ctrBkt.Get(stateKey)
if stateBytes == nil {
return errors.Wrapf(ErrInternal, "container %s missing state key in DB", string(id))
}
netNSBytes := ctrBkt.Get(netNSKey)
if err := json.Unmarshal(configBytes, ctr.config); err != nil {
return errors.Wrapf(err, "error unmarshalling container %s config", string(id))
}
if err := json.Unmarshal(stateBytes, ctr.state); err != nil {
return errors.Wrapf(err, "error unmarshalling container %s state", string(id))
}
if !parseNetNSBoltData(ctr, netNSBytes) {
valid = false
}
// Get the lock
lockPath := filepath.Join(s.lockDir, string(id))
lock, err := storage.GetLockfile(lockPath)
if err != nil {
return errors.Wrapf(err, "error retrieving lockfile for container %s", string(id))
}
ctr.lock = lock
ctr.runtime = s.runtime
ctr.valid = valid
return nil
}
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