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healer.go
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healer.go
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// Copyright 2015 tsuru authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package healer
import (
"encoding/json"
"fmt"
"time"
"github.com/globalsign/mgo"
"github.com/globalsign/mgo/bson"
"github.com/pkg/errors"
"github.com/tsuru/config"
"github.com/tsuru/tsuru/app"
"github.com/tsuru/tsuru/db"
"github.com/tsuru/tsuru/db/storage"
"github.com/tsuru/tsuru/event"
"github.com/tsuru/tsuru/healer"
"github.com/tsuru/tsuru/permission"
"github.com/tsuru/tsuru/provision"
"github.com/tsuru/tsuru/provision/docker/types"
permTypes "github.com/tsuru/tsuru/types/permission"
)
var (
consecutiveHealingsTimeframe = 5 * time.Minute
consecutiveHealingsLimitInTimeframe = 3
)
func init() {
event.SetThrottling(event.ThrottlingSpec{
TargetType: event.TargetTypeContainer,
KindName: "healer",
Time: consecutiveHealingsTimeframe,
Max: consecutiveHealingsLimitInTimeframe,
AllTargets: true,
WaitFinish: true,
})
}
func toHealingEvt(evt *event.Event) (types.HealingEvent, error) {
healingEvt := types.HealingEvent{
ID: evt.UniqueID,
StartTime: evt.StartTime,
EndTime: evt.EndTime,
Action: fmt.Sprintf("%s-healing", evt.Target.Type),
Successful: evt.Error == "",
Error: evt.Error,
}
switch evt.Target.Type {
case event.TargetTypeContainer:
err := evt.StartData(&healingEvt.FailingContainer)
if err != nil {
return healingEvt, err
}
err = evt.EndData(&healingEvt.CreatedContainer)
if err != nil {
return healingEvt, err
}
case event.TargetTypeNode:
var data healer.NodeHealerCustomData
err := evt.StartData(&data)
if err != nil {
return healingEvt, err
}
if data.LastCheck != nil {
healingEvt.Extra = data.LastCheck
}
healingEvt.Reason = data.Reason
healingEvt.FailingNode = data.Node
var createdNode provision.NodeSpec
err = evt.EndData(&createdNode)
if err != nil {
return healingEvt, err
}
healingEvt.CreatedNode = createdNode
}
return healingEvt, nil
}
func ListHealingHistory(filter string) ([]types.HealingEvent, error) {
evtFilter := event.Filter{
KindNames: []string{"healer"},
KindType: event.KindTypeInternal,
}
if filter != "" {
t, err := event.GetTargetType(filter)
if err == nil {
evtFilter.Target = event.Target{Type: t}
}
}
evts, err := event.List(&evtFilter)
if err != nil {
return nil, err
}
healingEvts := make([]types.HealingEvent, len(evts))
for i := range evts {
healingEvts[i], err = toHealingEvt(&evts[i])
if err != nil {
return nil, err
}
}
return healingEvts, nil
}
func oldHealingCollection() (*storage.Collection, error) {
name, _ := config.GetString("docker:healing:events_collection")
if name == "" {
name = "healing_events"
}
conn, err := db.Conn()
if err != nil {
return nil, err
}
return conn.Collection(name), nil
}
func healingEventToEvent(data *types.HealingEvent) error {
var evt event.Event
evt.UniqueID = data.ID.(bson.ObjectId)
var startOpts, endOpts interface{}
switch data.Action {
case "node-healing":
evt.Target = event.Target{Type: event.TargetTypeNode, Value: data.FailingNode.Address}
var lastCheck *healer.NodeChecks
if data.Extra != nil {
checkRaw, err := json.Marshal(data.Extra)
if err == nil {
json.Unmarshal(checkRaw, &lastCheck)
}
}
startOpts = healer.NodeHealerCustomData{
Node: data.FailingNode,
Reason: data.Reason,
LastCheck: lastCheck,
}
endOpts = data.CreatedNode
poolName := data.FailingNode.Metadata[provision.PoolMetadataName]
evt.Allowed = event.Allowed(permission.PermPoolReadEvents, permission.Context(permTypes.CtxPool, poolName))
case "container-healing":
evt.Target = event.Target{Type: event.TargetTypeContainer, Value: data.FailingContainer.ID}
startOpts = data.FailingContainer
endOpts = data.CreatedContainer
a, err := app.GetByName(data.FailingContainer.AppName)
if err == nil {
evt.Allowed = event.Allowed(permission.PermAppReadEvents, append(permission.Contexts(permTypes.CtxTeam, a.Teams),
permission.Context(permTypes.CtxApp, a.Name),
permission.Context(permTypes.CtxPool, a.Pool),
)...)
} else {
evt.Allowed = event.Allowed(permission.PermAppReadEvents)
}
default:
return errors.Errorf("invalid action %q", data.Action)
}
evt.Owner = event.Owner{Type: event.OwnerTypeInternal}
evt.Kind = event.Kind{Type: event.KindTypeInternal, Name: "healer"}
evt.StartTime = data.StartTime
evt.EndTime = data.EndTime
evt.Error = data.Error
err := evt.RawInsert(startOpts, nil, endOpts)
if mgo.IsDup(err) {
return nil
}
return err
}
func MigrateHealingToEvents() error {
coll, err := oldHealingCollection()
if err != nil {
return err
}
defer coll.Close()
coll.Find(nil).Iter()
iter := coll.Find(nil).Iter()
var data types.HealingEvent
for iter.Next(&data) {
err = healingEventToEvent(&data)
if err != nil {
return err
}
}
return iter.Close()
}