Beispiel #1
0
// setAllocatedOrRelease tries to associate the newly allocated
// address addr with the container. On failure it makes the best
// effort to cleanup and release addr, logging issues along the way.
func (p *ProvisionerAPI) setAllocatedOrRelease(
	addr *state.IPAddress,
	environ environs.NetworkingEnviron,
	instId instance.Id,
	container *state.Machine,
	subnetId network.Id,
	macAddress string,
) (err error) {
	defer func() {
		if errors.Cause(err) == nil {
			// Success!
			return
		}
		logger.Warningf(
			"failed to mark address %q as %q to container %q: %v (releasing and retrying)",
			addr.String(), state.AddressStateAllocated, container, err,
		)
		// It's as good as unavailable for us, so mark it as
		// such.
		err = setAddrState(addr, state.AddressStateUnavailable)
		if err != nil {
			logger.Warningf(
				"cannot set address %q to %q: %v (ignoring and releasing)",
				addr.String(), state.AddressStateUnavailable, err,
			)
		}
		err = environ.ReleaseAddress(instId, subnetId, addr.Address(), addr.MACAddress(), "")
		if err == nil {
			logger.Infof("address %q released; trying to allocate new", addr.String())
			return
		}
		logger.Warningf(
			"failed to release address %q on instance %q and subnet %q: %v (ignoring and retrying)",
			addr.String(), instId, subnetId, err,
		)
	}()

	// Any errors returned below will trigger the release/cleanup
	// steps above.
	if err = allocateAddrTo(addr, container, macAddress); err != nil {
		return errors.Trace(err)
	}
	if err = setAddrsTo(addr, container); err != nil {
		return errors.Trace(err)
	}

	logger.Infof("assigned address %q to container %q", addr.String(), container)
	return nil
}