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actual_lrp.go
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actual_lrp.go
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package models
import (
"encoding/json"
"errors"
"fmt"
"strings"
"time"
"code.cloudfoundry.org/bbs/format"
)
const (
ActualLRPStateUnclaimed = "UNCLAIMED"
ActualLRPStateClaimed = "CLAIMED"
ActualLRPStateRunning = "RUNNING"
ActualLRPStateCrashed = "CRASHED"
CrashResetTimeout = 5 * time.Minute
RetireActualLRPRetryAttempts = 5
)
var ActualLRPStates = []string{
ActualLRPStateUnclaimed,
ActualLRPStateClaimed,
ActualLRPStateRunning,
ActualLRPStateCrashed,
}
// DEPRECATED
type ActualLRPChange struct {
Before *ActualLRPGroup
After *ActualLRPGroup
}
type ActualLRPFilter struct {
Domain string
CellID string
ProcessGuid string
Index *int32
}
func NewActualLRPKey(processGuid string, index int32, domain string) ActualLRPKey {
return ActualLRPKey{processGuid, index, domain}
}
func NewActualLRPInstanceKey(instanceGuid string, cellId string) ActualLRPInstanceKey {
return ActualLRPInstanceKey{instanceGuid, cellId}
}
func NewActualLRPNetInfo(address string, instanceAddress string, preferredAddress ActualLRPNetInfo_PreferredAddress, ports ...*PortMapping) ActualLRPNetInfo {
return ActualLRPNetInfo{address, ports, instanceAddress, preferredAddress}
}
func EmptyActualLRPNetInfo() ActualLRPNetInfo {
return NewActualLRPNetInfo("", "", ActualLRPNetInfo_PreferredAddressUnknown)
}
func (info ActualLRPNetInfo) Empty() bool {
return info.Address == "" && len(info.Ports) == 0 && info.PreferredAddress == ActualLRPNetInfo_PreferredAddressUnknown
}
func (*ActualLRPNetInfo) Version() format.Version {
return format.V0
}
func (d *ActualLRPNetInfo_PreferredAddress) UnmarshalJSON(data []byte) error {
var name string
if err := json.Unmarshal(data, &name); err != nil {
return err
}
if v, found := ActualLRPNetInfo_PreferredAddress_value[name]; found {
*d = ActualLRPNetInfo_PreferredAddress(v)
return nil
}
return fmt.Errorf("invalid preferred address: %s", name)
}
func (d ActualLRPNetInfo_PreferredAddress) MarshalJSON() ([]byte, error) {
return json.Marshal(d.String())
}
func NewPortMapping(hostPort, containerPort uint32) *PortMapping {
return &PortMapping{
HostPort: hostPort,
ContainerPort: containerPort,
}
}
func NewPortMappingWithTLSProxy(hostPort, containerPort, tlsHost, tlsContainer uint32) *PortMapping {
return &PortMapping{
HostPort: hostPort,
ContainerPort: containerPort,
ContainerTlsProxyPort: tlsContainer,
HostTlsProxyPort: tlsHost,
}
}
func (key ActualLRPInstanceKey) Empty() bool {
return key.InstanceGuid == "" && key.CellId == ""
}
func (a *ActualLRP) Copy() *ActualLRP {
newActualLRP := *a
return &newActualLRP
}
const StaleUnclaimedActualLRPDuration = 30 * time.Second
func (actual ActualLRP) ShouldStartUnclaimed(now time.Time) bool {
if actual.State != ActualLRPStateUnclaimed {
return false
}
if now.Sub(time.Unix(0, actual.Since)) > StaleUnclaimedActualLRPDuration {
return true
}
return false
}
func (actual ActualLRP) CellIsMissing(cellSet CellSet) bool {
if actual.State == ActualLRPStateUnclaimed ||
actual.State == ActualLRPStateCrashed {
return false
}
return !cellSet.HasCellID(actual.CellId)
}
func (actual ActualLRP) ShouldRestartImmediately(calc RestartCalculator) bool {
if actual.State != ActualLRPStateCrashed {
return false
}
return calc.ShouldRestart(0, 0, actual.CrashCount)
}
func (actual ActualLRP) ShouldRestartCrash(now time.Time, calc RestartCalculator) bool {
if actual.State != ActualLRPStateCrashed {
return false
}
return calc.ShouldRestart(now.UnixNano(), actual.Since, actual.CrashCount)
}
func (before ActualLRP) AllowsTransitionTo(lrpKey *ActualLRPKey, instanceKey *ActualLRPInstanceKey, newState string) bool {
if !before.ActualLRPKey.Equal(lrpKey) {
return false
}
var valid bool
switch before.State {
case ActualLRPStateUnclaimed:
valid = newState == ActualLRPStateUnclaimed ||
newState == ActualLRPStateClaimed ||
newState == ActualLRPStateRunning
case ActualLRPStateClaimed:
valid = newState == ActualLRPStateUnclaimed && instanceKey.Empty() ||
newState == ActualLRPStateClaimed && before.ActualLRPInstanceKey.Equal(instanceKey) ||
newState == ActualLRPStateRunning ||
newState == ActualLRPStateCrashed && before.ActualLRPInstanceKey.Equal(instanceKey)
case ActualLRPStateRunning:
valid = newState == ActualLRPStateUnclaimed && instanceKey.Empty() ||
newState == ActualLRPStateClaimed && before.ActualLRPInstanceKey.Equal(instanceKey) ||
newState == ActualLRPStateRunning && before.ActualLRPInstanceKey.Equal(instanceKey) ||
newState == ActualLRPStateCrashed && before.ActualLRPInstanceKey.Equal(instanceKey)
case ActualLRPStateCrashed:
valid = newState == ActualLRPStateUnclaimed && instanceKey.Empty() ||
newState == ActualLRPStateClaimed && before.ActualLRPInstanceKey.Equal(instanceKey) ||
newState == ActualLRPStateRunning && before.ActualLRPInstanceKey.Equal(instanceKey)
}
return valid
}
func (d *ActualLRP_Presence) UnmarshalJSON(data []byte) error {
var name string
if err := json.Unmarshal(data, &name); err != nil {
return err
}
if v, found := ActualLRP_Presence_value[name]; found {
*d = ActualLRP_Presence(v)
return nil
}
return fmt.Errorf("invalid presence: %s", name)
}
func (d ActualLRP_Presence) MarshalJSON() ([]byte, error) {
return json.Marshal(d.String())
}
// DEPRECATED
func NewRunningActualLRPGroup(actualLRP *ActualLRP) *ActualLRPGroup {
return &ActualLRPGroup{
Instance: actualLRP,
}
}
// DEPRECATED
func NewEvacuatingActualLRPGroup(actualLRP *ActualLRP) *ActualLRPGroup {
return &ActualLRPGroup{
Evacuating: actualLRP,
}
}
// DEPRECATED
func (group ActualLRPGroup) Resolve() (*ActualLRP, bool, error) {
switch {
case group.Instance == nil && group.Evacuating == nil:
return nil, false, ErrActualLRPGroupInvalid
case group.Instance == nil:
return group.Evacuating, true, nil
case group.Evacuating == nil:
return group.Instance, false, nil
case group.Instance.State == ActualLRPStateRunning || group.Instance.State == ActualLRPStateCrashed:
return group.Instance, false, nil
default:
return group.Evacuating, true, nil
}
}
func NewUnclaimedActualLRP(lrpKey ActualLRPKey, since int64) *ActualLRP {
return &ActualLRP{
ActualLRPKey: lrpKey,
State: ActualLRPStateUnclaimed,
Since: since,
}
}
func NewClaimedActualLRP(lrpKey ActualLRPKey, instanceKey ActualLRPInstanceKey, since int64) *ActualLRP {
return &ActualLRP{
ActualLRPKey: lrpKey,
ActualLRPInstanceKey: instanceKey,
State: ActualLRPStateClaimed,
Since: since,
}
}
func NewRunningActualLRP(lrpKey ActualLRPKey, instanceKey ActualLRPInstanceKey, netInfo ActualLRPNetInfo, since int64) *ActualLRP {
return &ActualLRP{
ActualLRPKey: lrpKey,
ActualLRPInstanceKey: instanceKey,
ActualLRPNetInfo: netInfo,
State: ActualLRPStateRunning,
Since: since,
}
}
func (*ActualLRP) Version() format.Version {
return format.V0
}
func (actualLRPInfo *ActualLRPInfo) ToActualLRP(lrpKey ActualLRPKey, lrpInstanceKey ActualLRPInstanceKey) *ActualLRP {
if actualLRPInfo == nil {
return nil
}
return &ActualLRP{
ActualLRPKey: lrpKey,
ActualLRPInstanceKey: lrpInstanceKey,
ActualLRPNetInfo: actualLRPInfo.ActualLRPNetInfo,
CrashCount: actualLRPInfo.CrashCount,
CrashReason: actualLRPInfo.CrashReason,
State: actualLRPInfo.State,
PlacementError: actualLRPInfo.PlacementError,
Since: actualLRPInfo.Since,
ModificationTag: actualLRPInfo.ModificationTag,
Presence: actualLRPInfo.Presence,
}
}
func (actual *ActualLRP) ToActualLRPInfo() *ActualLRPInfo {
if actual == nil {
return nil
}
return &ActualLRPInfo{
ActualLRPNetInfo: actual.ActualLRPNetInfo,
CrashCount: actual.CrashCount,
CrashReason: actual.CrashReason,
State: actual.State,
PlacementError: actual.PlacementError,
Since: actual.Since,
ModificationTag: actual.ModificationTag,
Presence: actual.Presence,
}
}
// DEPRECATED
func (actual *ActualLRP) ToActualLRPGroup() *ActualLRPGroup {
if actual == nil {
return nil
}
switch actual.Presence {
case ActualLRP_Evacuating:
return &ActualLRPGroup{Evacuating: actual}
default:
return &ActualLRPGroup{Instance: actual}
}
}
func (actual ActualLRP) Validate() error {
var validationError ValidationError
err := actual.ActualLRPKey.Validate()
if err != nil {
validationError = validationError.Append(err)
}
if actual.Since == 0 {
validationError = validationError.Append(ErrInvalidField{"since"})
}
switch actual.State {
case ActualLRPStateUnclaimed:
if !actual.ActualLRPInstanceKey.Empty() {
validationError = validationError.Append(errors.New("instance key cannot be set when state is unclaimed"))
}
if !actual.ActualLRPNetInfo.Empty() {
validationError = validationError.Append(errors.New("net info cannot be set when state is unclaimed"))
}
if actual.Presence != ActualLRP_Ordinary {
validationError = validationError.Append(errors.New("presence cannot be set when state is unclaimed"))
}
case ActualLRPStateClaimed:
if err := actual.ActualLRPInstanceKey.Validate(); err != nil {
validationError = validationError.Append(err)
}
if !actual.ActualLRPNetInfo.Empty() {
validationError = validationError.Append(errors.New("net info cannot be set when state is claimed"))
}
if strings.TrimSpace(actual.PlacementError) != "" {
validationError = validationError.Append(errors.New("placement error cannot be set when state is claimed"))
}
case ActualLRPStateRunning:
if err := actual.ActualLRPInstanceKey.Validate(); err != nil {
validationError = validationError.Append(err)
}
if err := actual.ActualLRPNetInfo.Validate(); err != nil {
validationError = validationError.Append(err)
}
if strings.TrimSpace(actual.PlacementError) != "" {
validationError = validationError.Append(errors.New("placement error cannot be set when state is running"))
}
case ActualLRPStateCrashed:
if !actual.ActualLRPInstanceKey.Empty() {
validationError = validationError.Append(errors.New("instance key cannot be set when state is crashed"))
}
if !actual.ActualLRPNetInfo.Empty() {
validationError = validationError.Append(errors.New("net info cannot be set when state is crashed"))
}
if strings.TrimSpace(actual.PlacementError) != "" {
validationError = validationError.Append(errors.New("placement error cannot be set when state is crashed"))
}
default:
validationError = validationError.Append(ErrInvalidField{"state"})
}
if !validationError.Empty() {
return validationError
}
return nil
}
func (key *ActualLRPKey) Validate() error {
var validationError ValidationError
if key.ProcessGuid == "" {
validationError = validationError.Append(ErrInvalidField{"process_guid"})
}
if key.Index < 0 {
validationError = validationError.Append(ErrInvalidField{"index"})
}
if key.Domain == "" {
validationError = validationError.Append(ErrInvalidField{"domain"})
}
if !validationError.Empty() {
return validationError
}
return nil
}
func (key *ActualLRPNetInfo) Validate() error {
var validationError ValidationError
if key.Address == "" {
return validationError.Append(ErrInvalidField{"address"})
}
return nil
}
func (key *ActualLRPInstanceKey) Validate() error {
var validationError ValidationError
if key.CellId == "" {
validationError = validationError.Append(ErrInvalidField{"cell_id"})
}
if key.InstanceGuid == "" {
validationError = validationError.Append(ErrInvalidField{"instance_guid"})
}
if !validationError.Empty() {
return validationError
}
return nil
}
// hasHigherPriority returns true if lrp1 takes precendence over lrp2
func hasHigherPriority(lrp1, lrp2 *ActualLRP) bool {
if lrp1 == nil {
return false
}
if lrp2 == nil {
return true
}
if lrp1.Presence == ActualLRP_Ordinary {
switch lrp1.State {
case ActualLRPStateRunning:
return true
case ActualLRPStateClaimed:
return lrp2.State != ActualLRPStateRunning && lrp2.State != ActualLRPStateClaimed
}
} else if lrp1.Presence == ActualLRP_Suspect {
switch lrp1.State {
case ActualLRPStateRunning:
return lrp2.State != ActualLRPStateRunning
case ActualLRPStateClaimed:
return lrp2.State != ActualLRPStateRunning
}
}
// Cases where we are comparing two LRPs with the same presence have undefined behavior since it shouldn't happen
// with the way they're stored in the database
return false
}
// DEPRECATED
// ResolveActualLRPGroups convert the given set of lrp instances into
// ActualLRPGroup. This conversion is lossy. A suspect LRP is given
// precendence over an Ordinary instance if it is Running. Otherwise, the
// Ordinary instance is returned in the Instance field of the ActualLRPGroup.
func ResolveActualLRPGroups(lrps []*ActualLRP) []*ActualLRPGroup {
mapOfGroups := map[ActualLRPKey]*ActualLRPGroup{}
result := []*ActualLRPGroup{}
for _, actualLRP := range lrps {
// Every actual LRP has potentially 2 rows in the database: one for the instance
// one for the evacuating. When building the list of actual LRP groups (where
// a group is the instance and corresponding evacuating), make sure we don't add the same
// actual lrp twice.
if mapOfGroups[actualLRP.ActualLRPKey] == nil {
mapOfGroups[actualLRP.ActualLRPKey] = &ActualLRPGroup{}
result = append(result, mapOfGroups[actualLRP.ActualLRPKey])
}
if actualLRP.Presence == ActualLRP_Evacuating {
mapOfGroups[actualLRP.ActualLRPKey].Evacuating = actualLRP
} else if hasHigherPriority(actualLRP, mapOfGroups[actualLRP.ActualLRPKey].Instance) {
mapOfGroups[actualLRP.ActualLRPKey].Instance = actualLRP
}
}
return result
}
// DEPRECATED
// ResolveToActualLRPGroup calls ResolveActualLRPGroups and return the first
// LRP group. It panics if there are more than one group. If there no LRP
// groups were returned by ResolveActualLRPGroups, then an empty ActualLRPGroup
// is returned.
func ResolveActualLRPGroup(lrps []*ActualLRP) *ActualLRPGroup {
actualLRPGroups := ResolveActualLRPGroups(lrps)
switch len(actualLRPGroups) {
case 0:
return &ActualLRPGroup{}
case 1:
return actualLRPGroups[0]
default:
panic("shouldn't get here")
}
}