func logAllSeverities(logger loggo.Logger) {
logger.Criticalf("something critical")
logger.Errorf("an error")
logger.Warningf("a warning message")
logger.Infof("an info message")
logger.Debugf("a debug message")
logger.Tracef("a trace message")
}
func (c *Client) sendRateLimitedRequest(method, URL string, headers http.Header, reqData []byte,
logger *loggo.Logger) (resp *http.Response, err error) {
for i := 0; i < c.maxSendAttempts; i++ {
var reqReader io.Reader
if reqData != nil {
reqReader = bytes.NewReader(reqData)
}
req, err := http.NewRequest(method, URL, reqReader)
if err != nil {
err = errors.Newf(err, "failed creating the request %s", URL)
return nil, err
}
// Setting req.Close to true to avoid malformed HTTP version "nullHTTP/1.1" error
// See http://stackoverflow.com/questions/17714494/golang-http-request-results-in-eof-errors-when-making-multiple-requests-successi
req.Close = true
for header, values := range headers {
for _, value := range values {
req.Header.Add(header, value)
}
}
req.ContentLength = int64(len(reqData))
resp, err = c.Do(req)
if err != nil {
return nil, errors.Newf(err, "failed executing the request %s", URL)
}
if resp.StatusCode != http.StatusRequestEntityTooLarge || resp.Header.Get("Retry-After") == "" {
return resp, nil
}
resp.Body.Close()
retryAfter, err := strconv.ParseFloat(resp.Header.Get("Retry-After"), 64)
if err != nil {
return nil, errors.Newf(err, "Invalid Retry-After header %s", URL)
}
if retryAfter == 0 {
return nil, errors.Newf(err, "Resource limit exeeded at URL %s", URL)
}
if logger != nil {
logger.Warningf("Too many requests, retrying in %dms.", int(retryAfter*1000))
}
time.Sleep(time.Duration(retryAfter) * time.Second)
}
return nil, errors.Newf(err, "Maximum number of attempts (%d) reached sending request to %s", c.maxSendAttempts, URL)
}
func maybeReleaseContainerAddresses(
api APICalls,
instanceID instance.Id,
namespace string,
log loggo.Logger,
) {
if environs.AddressAllocationEnabled() {
// The addresser worker will take care of the addresses.
return
}
// If we're not using addressable containers, we might still have used MAAS
// 1.8+ device to register the container when provisioning. In that case we
// need to attempt releasing the device, but ignore a NotSupported error
// (when we're not using MAAS 1.8+).
namespacePrefix := fmt.Sprintf("%s-", namespace)
tagString := strings.TrimPrefix(string(instanceID), namespacePrefix)
containerTag, err := names.ParseMachineTag(tagString)
if err != nil {
// Not a reason to cause StopInstances to fail though..
log.Warningf("unexpected container tag %q: %v", instanceID, err)
return
}
err = api.ReleaseContainerAddresses(containerTag)
switch {
case err == nil:
log.Infof("released all addresses for container %q", containerTag.Id())
case errors.IsNotSupported(err):
log.Warningf("not releasing all addresses for container %q: %v", containerTag.Id(), err)
default:
log.Warningf(
"unexpected error trying to release container %q addreses: %v",
containerTag.Id(), err,
)
}
}
func releaseContainerAddresses(
api APICalls,
instanceID instance.Id,
namespace instance.Namespace,
log loggo.Logger,
) {
containerTag, err := namespace.MachineTag(string(instanceID))
if err != nil {
// Not a reason to cause StopInstances to fail though..
log.Warningf("unexpected container tag %q: %v", instanceID, err)
return
}
err = api.ReleaseContainerAddresses(containerTag)
switch {
case err == nil:
log.Infof("released all addresses for container %q", containerTag.Id())
case errors.IsNotSupported(err):
log.Warningf("not releasing all addresses for container %q: %v", containerTag.Id(), err)
default:
log.Warningf(
"unexpected error trying to release container %q addreses: %v",
containerTag.Id(), err,
)
}
}
func prepareOrGetContainerInterfaceInfo(
api APICalls,
machineID string,
bridgeDevice string,
allocateOrMaintain bool,
enableNAT bool,
startingNetworkInfo []network.InterfaceInfo,
log loggo.Logger,
providerType string,
) ([]network.InterfaceInfo, error) {
maintain := !allocateOrMaintain
if environs.AddressAllocationEnabled(providerType) {
if maintain {
log.Debugf("running maintenance for container %q", machineID)
} else {
log.Debugf("trying to allocate static IP for container %q", machineID)
}
allocatedInfo, err := configureContainerNetwork(
machineID,
bridgeDevice,
api,
startingNetworkInfo,
allocateOrMaintain,
enableNAT,
)
if err != nil && !maintain {
log.Infof("not allocating static IP for container %q: %v", machineID, err)
}
return allocatedInfo, err
}
if maintain {
log.Debugf("address allocation disabled: Not running maintenance for machine %q", machineID)
return nil, nil
}
log.Debugf("address allocation feature flag not enabled; using multi-bridge networking for container %q", machineID)
// In case we're running on MAAS 1.8+ with devices support, we'll still
// call PrepareContainerInterfaceInfo(), but we'll ignore a NotSupported
// error if we get it (which means we're not using MAAS 1.8+).
containerTag := names.NewMachineTag(machineID)
preparedInfo, err := api.PrepareContainerInterfaceInfo(containerTag)
if err != nil && errors.IsNotSupported(err) {
log.Warningf("new container %q not registered as device: not running on MAAS 1.8+", machineID)
return nil, nil
} else if err != nil {
return nil, errors.Trace(err)
}
log.Tracef("PrepareContainerInterfaceInfo returned %+v", preparedInfo)
dnsServersFound := false
for _, info := range preparedInfo {
if len(info.DNSServers) > 0 {
dnsServersFound = true
break
}
}
if !dnsServersFound {
logger.Warningf("no DNS settings found, discovering the host settings")
dnsServers, searchDomain, err := localDNSServers()
if err != nil {
return nil, errors.Trace(err)
}
// Since the result is sorted, the first entry is the primary NIC.
preparedInfo[0].DNSServers = dnsServers
preparedInfo[0].DNSSearchDomains = []string{searchDomain}
logger.Debugf(
"setting DNS servers %+v and domains %+v on container interface %q",
preparedInfo[0].DNSServers, preparedInfo[0].DNSSearchDomains, preparedInfo[0].InterfaceName,
)
}
return preparedInfo, nil
}
func prepareOrGetContainerInterfaceInfo(
api APICalls,
machineID string,
bridgeDevice string,
allocateOrMaintain bool,
enableNAT bool,
startingNetworkInfo []network.InterfaceInfo,
log loggo.Logger,
) ([]network.InterfaceInfo, error) {
maintain := !allocateOrMaintain
if environs.AddressAllocationEnabled() {
if maintain {
log.Debugf("running maintenance for container %q", machineID)
} else {
log.Debugf("trying to allocate static IP for container %q", machineID)
}
allocatedInfo, err := configureContainerNetwork(
machineID,
bridgeDevice,
api,
startingNetworkInfo,
allocateOrMaintain,
enableNAT,
)
if err != nil && !maintain {
log.Infof("not allocating static IP for container %q: %v", machineID, err)
}
return allocatedInfo, err
}
if maintain {
log.Debugf("address allocation disabled: Not running maintenance for machine %q", machineID)
return nil, nil
}
log.Debugf("address allocation feature flag not enabled; using DHCP for container %q", machineID)
// In case we're running on MAAS 1.8+ with devices support, we'll still
// call PrepareContainerInterfaceInfo(), but we'll ignore a NotSupported
// error if we get it (which means we're not using MAAS 1.8+).
containerTag := names.NewMachineTag(machineID)
preparedInfo, err := api.PrepareContainerInterfaceInfo(containerTag)
if err != nil && errors.IsNotSupported(err) {
log.Warningf("new container %q not registered as device: not running on MAAS 1.8+", machineID)
return nil, nil
} else if err != nil {
return nil, errors.Trace(err)
}
dnsServers, searchDomain, dnsErr := localDNSServers()
if dnsErr != nil {
return nil, errors.Trace(dnsErr)
}
for i, _ := range preparedInfo {
preparedInfo[i].DNSServers = dnsServers
preparedInfo[i].DNSSearch = searchDomain
}
log.Tracef("PrepareContainerInterfaceInfo returned %#v", preparedInfo)
// Most likely there will be only one item in the list, but check
// all of them for forward compatibility.
macAddresses := set.NewStrings()
for _, prepInfo := range preparedInfo {
macAddresses.Add(prepInfo.MACAddress)
}
log.Infof(
"new container %q registered as a MAAS device with MAC address(es) %v",
machineID, macAddresses.SortedValues(),
)
return preparedInfo, nil
}