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foreman.go
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foreman.go
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/*
* Copyright 2018-2019, CS Systemes d'Information, http://www.c-s.fr
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package control
import (
"bytes"
"encoding/json"
"fmt"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
txttmpl "text/template"
"time"
rice "github.com/GeertJohan/go.rice"
"github.com/sirupsen/logrus"
pb "github.com/CS-SI/SafeScale/lib"
"github.com/CS-SI/SafeScale/lib/client"
"github.com/CS-SI/SafeScale/lib/server/cluster/api"
clusterpropsv1 "github.com/CS-SI/SafeScale/lib/server/cluster/control/properties/v1"
clusterpropsv2 "github.com/CS-SI/SafeScale/lib/server/cluster/control/properties/v2"
"github.com/CS-SI/SafeScale/lib/server/cluster/enums/ClusterState"
"github.com/CS-SI/SafeScale/lib/server/cluster/enums/Complexity"
"github.com/CS-SI/SafeScale/lib/server/cluster/enums/NodeType"
"github.com/CS-SI/SafeScale/lib/server/cluster/enums/Property"
"github.com/CS-SI/SafeScale/lib/server/iaas"
"github.com/CS-SI/SafeScale/lib/server/iaas/resources"
"github.com/CS-SI/SafeScale/lib/server/install"
providermetadata "github.com/CS-SI/SafeScale/lib/server/metadata"
srvutils "github.com/CS-SI/SafeScale/lib/server/utils"
"github.com/CS-SI/SafeScale/lib/system"
"github.com/CS-SI/SafeScale/lib/utils"
"github.com/CS-SI/SafeScale/lib/utils/concurrency"
"github.com/CS-SI/SafeScale/lib/utils/data"
"github.com/CS-SI/SafeScale/lib/utils/retry"
"github.com/CS-SI/SafeScale/lib/utils/scerr"
"github.com/CS-SI/SafeScale/lib/utils/template"
"github.com/CS-SI/SafeScale/lib/utils/temporal"
)
var (
timeoutCtxHost = temporal.GetLongOperationTimeout()
// funcMap defines the custom functions to be used in templates
funcMap = txttmpl.FuncMap{
// The name "inc" is what the function will be called in the template text.
"inc": func(i int) int {
return i + 1
},
}
// // systemTemplateBox ...
// systemTemplateBox *rice.Box
// bashLibraryContent contains the script containing bash library
bashLibraryContent *string
)
// Makers ...
type Makers struct {
MinimumRequiredServers func(task concurrency.Task, b Foreman) (int, int, int) // returns masterCount, pruvateNodeCount, publicNodeCount
DefaultGatewaySizing func(task concurrency.Task, b Foreman) pb.HostDefinition // sizing of Gateway(s)
DefaultMasterSizing func(task concurrency.Task, b Foreman) pb.HostDefinition // default sizing of master(s)
DefaultNodeSizing func(task concurrency.Task, b Foreman) pb.HostDefinition // default sizing of node(s)
DefaultImage func(task concurrency.Task, b Foreman) string // default image of server(s)
GetNodeInstallationScript func(task concurrency.Task, b Foreman, nodeType NodeType.Enum) (string, map[string]interface{})
GetGlobalSystemRequirements func(task concurrency.Task, b Foreman) (string, error)
GetTemplateBox func() (*rice.Box, error)
ConfigureGateway func(task concurrency.Task, b Foreman) error
CreateMaster func(task concurrency.Task, b Foreman, index int) error
ConfigureMaster func(task concurrency.Task, b Foreman, index int, pbHost *pb.Host) error
UnconfigureMaster func(task concurrency.Task, b Foreman, pbHost *pb.Host) error
CreateNode func(task concurrency.Task, b Foreman, index int, pbHost *pb.Host) error
ConfigureNode func(task concurrency.Task, b Foreman, index int, pbHost *pb.Host) error
UnconfigureNode func(task concurrency.Task, b Foreman, pbHost *pb.Host, selectedMasterID string) error
ConfigureCluster func(task concurrency.Task, b Foreman) error
UnconfigureCluster func(task concurrency.Task, b Foreman) error
JoinMasterToCluster func(task concurrency.Task, b Foreman, pbHost *pb.Host) error
JoinNodeToCluster func(task concurrency.Task, b Foreman, pbHost *pb.Host) error
LeaveMasterFromCluster func(task concurrency.Task, b Foreman, pbHost *pb.Host) error
LeaveNodeFromCluster func(task concurrency.Task, b Foreman, pbHost *pb.Host, selectedMaster string) error
GetState func(task concurrency.Task, b Foreman) (ClusterState.Enum, error)
}
//go:generate mockgen -destination=../mocks/mock_foreman.go -package=mocks github.com/CS-SI/SafeScale/lib/server/cluster/control Foreman
// Foreman interface, exposes public method
type Foreman interface {
Cluster() api.Cluster
ExecuteScript(*rice.Box, map[string]interface{}, string, map[string]interface{}, string) (int, string, string, error)
}
// foreman is the private side of Foreman...
type foreman struct {
cluster *Controller
makers Makers
}
// NewForeman creates a new *foreman to build a cluster
func NewForeman(c *Controller, makers Makers) Foreman {
return &foreman{
cluster: c,
makers: makers,
}
}
// Cluster ...
func (b *foreman) Cluster() api.Cluster {
return b.cluster
}
// ExecuteScript executes the script template with the parameters on tarGetHost
func (b *foreman) ExecuteScript(
box *rice.Box, funcMap map[string]interface{}, tmplName string, data map[string]interface{},
hostID string,
) (errCode int, stdOut string, stdErr string, err error) {
tracer := concurrency.NewTracer(nil, "("+hostID+")", true).GoingIn()
defer tracer.OnExitTrace()()
defer scerr.OnExitLogError(tracer.TraceMessage(""), &err)()
// Configures reserved_BashLibrary template var
bashLibrary, err := system.GetBashLibrary()
if err != nil {
return 0, "", "", err
}
data["reserved_BashLibrary"] = bashLibrary
path, err := uploadTemplateToFile(box, funcMap, tmplName, data, hostID, tmplName)
if err != nil {
return 0, "", "", err
}
// cmd = fmt.Sprintf("sudo bash %s; rc=$?; if [[ rc -eq 0 ]]; then rm %s; fi; exit $rc", path, path)
cmd := fmt.Sprintf("sudo bash %s; rc=$?; exit $rc", path)
return client.New().SSH.Run(hostID, cmd, temporal.GetConnectionTimeout(), 2*temporal.GetLongOperationTimeout())
}
// construct ...
func (b *foreman) construct(task concurrency.Task, req Request) (err error) {
tracer := concurrency.NewTracer(task, "", true).GoingIn()
defer tracer.OnExitTrace()()
defer scerr.OnExitLogError(tracer.TraceMessage(""), &err)()
// Wants to inform about the duration of the operation
defer temporal.NewStopwatch().OnExitLogInfo(
fmt.Sprintf("Starting construction of cluster '%s'...", req.Name),
fmt.Sprintf("Ending construction of cluster '%s'", req.Name),
)()
state := ClusterState.Unknown
defer func() {
if err != nil {
state = ClusterState.Error
} else {
state = ClusterState.Created
}
metaErr := b.cluster.UpdateMetadata(task, func() error {
// Cluster created and configured successfully
return b.cluster.GetProperties(task).LockForWrite(Property.StateV1).ThenUse(func(v interface{}) error {
v.(*clusterpropsv1.State).State = state
return nil
})
})
if metaErr != nil {
err = scerr.AddConsequence(err, metaErr)
}
}()
if task == nil {
task = concurrency.RootTask()
}
// Generate needed password for account cladm
cladmPassword, err := utils.GeneratePassword(16)
if err != nil {
return err
}
// Determine default image
var imageID string
if req.NodesDef != nil {
imageID = req.NodesDef.ImageId
}
if imageID == "" && b.makers.DefaultImage != nil {
imageID = b.makers.DefaultImage(task, b)
}
if imageID == "" {
imageID = "Ubuntu 18.04"
}
// Determine Gateway sizing
var gatewaysDefault *pb.HostDefinition
if b.makers.DefaultGatewaySizing != nil {
gatewaysDefault = complementHostDefinition(nil, b.makers.DefaultGatewaySizing(task, b))
} else {
gatewaysDefault = &pb.HostDefinition{
Sizing: &pb.HostSizing{
MinCpuCount: 2,
MaxCpuCount: 4,
MinRamSize: 7.0,
MaxRamSize: 16.0,
MinDiskSize: 50,
GpuCount: -1,
},
}
}
gatewaysDefault.ImageId = imageID
gatewaysDef := complementHostDefinition(req.GatewaysDef, *gatewaysDefault)
// Determine master sizing
var mastersDefault *pb.HostDefinition
if b.makers.DefaultMasterSizing != nil {
mastersDefault = complementHostDefinition(nil, b.makers.DefaultMasterSizing(task, b))
} else {
mastersDefault = &pb.HostDefinition{
Sizing: &pb.HostSizing{
MinCpuCount: 4,
MaxCpuCount: 8,
MinRamSize: 15.0,
MaxRamSize: 32.0,
MinDiskSize: 100,
GpuCount: -1,
},
}
}
// Note: no way yet to define master sizing from cli...
mastersDefault.ImageId = imageID
mastersDef := complementHostDefinition(req.MastersDef, *mastersDefault)
// Determine node sizing
var nodesDefault *pb.HostDefinition
if b.makers.DefaultNodeSizing != nil {
nodesDefault = complementHostDefinition(nil, b.makers.DefaultNodeSizing(task, b))
} else {
nodesDefault = &pb.HostDefinition{
Sizing: &pb.HostSizing{
MinCpuCount: 4,
MaxCpuCount: 8,
MinRamSize: 15.0,
MaxRamSize: 32.0,
MinDiskSize: 100,
GpuCount: -1,
},
}
}
nodesDefault.ImageId = imageID
nodesDef := complementHostDefinition(req.NodesDef, *nodesDefault)
// Initialize service to use
clientInstance := client.New()
tenant, err := clientInstance.Tenant.Get(temporal.GetExecutionTimeout())
if err != nil {
return err
}
svc, err := iaas.UseService(tenant.Name)
if err != nil {
return err
}
// Determine if Gateway Failover must be set
caps := svc.GetCapabilities()
gwFailoverDisabled := req.Complexity == Complexity.Small || !caps.PrivateVirtualIP
for k := range req.DisabledDefaultFeatures {
if k == "gateway-failover" {
gwFailoverDisabled = true
break
}
}
// Creates network
logrus.Debugf("[cluster %s] creating network 'net-%s'", req.Name, req.Name)
req.Name = strings.ToLower(req.Name)
networkName := "net-" + req.Name
sizing := srvutils.FromPBHostDefinitionToPBGatewayDefinition(*gatewaysDef)
def := pb.NetworkDefinition{
Name: networkName,
Cidr: req.CIDR,
Gateway: &sizing,
FailOver: !gwFailoverDisabled,
}
clientNetwork := clientInstance.Network
network, err := clientNetwork.Create(def, temporal.GetExecutionTimeout())
if err != nil {
return err
}
logrus.Debugf("[cluster %s] network '%s' creation successful.", req.Name, networkName)
req.NetworkID = network.Id
defer func() {
if err != nil && !req.KeepOnFailure {
derr := clientNetwork.Delete([]string{network.Id}, temporal.GetExecutionTimeout())
if derr != nil {
err = scerr.AddConsequence(err, derr)
}
}
}()
// Saving Cluster parameters, with status 'Creating'
var (
kp *resources.KeyPair
kpName string
primaryGateway, secondaryGateway *resources.Host
)
// Loads primary gateway metadata
primaryGatewayMetadata, err := providermetadata.LoadHost(svc, network.GatewayId)
if err != nil {
if _, ok := err.(scerr.ErrNotFound); ok {
if !ok {
return err
}
}
return err
}
primaryGateway, err = primaryGatewayMetadata.Get()
if err != nil {
return err
}
err = clientInstance.SSH.WaitReady(primaryGateway.ID, temporal.GetExecutionTimeout())
if err != nil {
return client.DecorateError(err, "wait for remote ssh service to be ready", false)
}
// Loads secondary gateway metadata
if !gwFailoverDisabled {
secondaryGatewayMetadata, err := providermetadata.LoadHost(svc, network.SecondaryGatewayId)
if err != nil {
if _, ok := err.(scerr.ErrNotFound); ok {
if !ok {
return err
}
}
return err
}
secondaryGateway, err = secondaryGatewayMetadata.Get()
if err != nil {
return err
}
err = clientInstance.SSH.WaitReady(primaryGateway.ID, temporal.GetExecutionTimeout())
if err != nil {
return client.DecorateError(err, "wait for remote ssh service to be ready", false)
}
}
// Create a KeyPair for the user cladm
kpName = "cluster_" + req.Name + "_cladm_key"
kp, err = svc.CreateKeyPair(kpName)
if err != nil {
return err
}
// Saving Cluster metadata, with status 'Creating'
b.cluster.Identity.Name = req.Name
b.cluster.Identity.Flavor = req.Flavor
b.cluster.Identity.Complexity = req.Complexity
b.cluster.Identity.Keypair = kp
b.cluster.Identity.AdminPassword = cladmPassword
err = b.cluster.UpdateMetadata(task, func() error {
err := b.cluster.GetProperties(task).LockForWrite(Property.DefaultsV2).ThenUse(func(v interface{}) error {
defaultsV2 := v.(*clusterpropsv2.Defaults)
defaultsV2.GatewaySizing = srvutils.FromPBHostSizing(*gatewaysDef.Sizing)
defaultsV2.MasterSizing = srvutils.FromPBHostSizing(*mastersDef.Sizing)
defaultsV2.NodeSizing = srvutils.FromPBHostSizing(*nodesDef.Sizing)
defaultsV2.Image = imageID
return nil
})
if err != nil {
return err
}
err = b.cluster.GetProperties(task).LockForWrite(Property.StateV1).ThenUse(func(v interface{}) error {
v.(*clusterpropsv1.State).State = ClusterState.Creating
return nil
})
if err != nil {
return err
}
err = b.cluster.GetProperties(task).LockForWrite(Property.CompositeV1).ThenUse(func(v interface{}) error {
v.(*clusterpropsv1.Composite).Tenants = []string{req.Tenant}
return nil
})
if err != nil {
return err
}
return b.cluster.GetProperties(task).LockForWrite(Property.NetworkV2).ThenUse(func(v interface{}) error {
networkV2 := v.(*clusterpropsv2.Network)
networkV2.NetworkID = req.NetworkID
networkV2.CIDR = req.CIDR
networkV2.GatewayID = primaryGateway.ID
networkV2.GatewayIP = primaryGateway.GetPrivateIP()
if !gwFailoverDisabled {
networkV2.SecondaryGatewayID = secondaryGateway.ID
networkV2.SecondaryGatewayIP = secondaryGateway.GetPrivateIP()
networkV2.DefaultRouteIP = network.VirtualIp.PrivateIp
// VPL: no public IP on VIP yet...
// networkV2.EndpointIP = network.VirtualIp.PublicIp
networkV2.EndpointIP = primaryGateway.GetPublicIP()
networkV2.PrimaryPublicIP = primaryGateway.GetPublicIP()
networkV2.SecondaryPublicIP = secondaryGateway.GetPublicIP()
} else {
networkV2.DefaultRouteIP = primaryGateway.GetPrivateIP()
networkV2.EndpointIP = primaryGateway.GetPublicIP()
networkV2.PrimaryPublicIP = networkV2.EndpointIP
}
return nil
})
})
if err != nil {
return err
}
defer func() {
if err != nil && !req.KeepOnFailure {
derr := b.cluster.DeleteMetadata(task)
if derr != nil {
err = scerr.AddConsequence(err, derr)
}
}
}()
masterCount, privateNodeCount, _ := b.determineRequiredNodes(task)
var (
primaryGatewayStatus error
secondaryGatewayStatus error
mastersStatus error
privateNodesStatus error
secondaryGatewayTask concurrency.Task
)
// Step 1: starts gateway installation plus masters creation plus nodes creation
primaryGatewayTask, err := task.New()
if err != nil {
return err
}
primaryGatewayTask, err = primaryGatewayTask.Start(b.taskInstallGateway, srvutils.ToPBHost(primaryGateway))
if err != nil {
return err
}
if !gwFailoverDisabled {
secondaryGatewayTask, err = task.New()
if err != nil {
return err
}
secondaryGatewayTask, err = secondaryGatewayTask.Start(b.taskInstallGateway, srvutils.ToPBHost(secondaryGateway))
if err != nil {
return err
}
}
mastersTask, err := task.New()
if err != nil {
return err
}
mastersTask, err = mastersTask.Start(b.taskCreateMasters, data.Map{
"count": masterCount,
"masterDef": mastersDef,
"nokeep": !req.KeepOnFailure,
})
if err != nil {
return err
}
privateNodesTask, err := task.New()
if err != nil {
return err
}
privateNodesTask, err = privateNodesTask.Start(b.taskCreateNodes, data.Map{
"count": privateNodeCount,
"public": false,
"nodeDef": nodesDef,
"nokeep": !req.KeepOnFailure,
})
if err != nil {
return err
}
// FIXME What about cleanup ?, unit test Task class
// Step 2: awaits gateway installation end and masters installation end
_, primaryGatewayStatus = primaryGatewayTask.Wait()
if primaryGatewayStatus != nil {
mastersTask.Abort()
privateNodesTask.Abort()
return primaryGatewayStatus
}
if !gwFailoverDisabled {
if secondaryGatewayTask != nil {
_, secondaryGatewayStatus = secondaryGatewayTask.Wait()
if secondaryGatewayStatus != nil {
mastersTask.Abort()
privateNodesTask.Abort()
return secondaryGatewayStatus
}
}
}
// Starting from here, delete masters if exiting with error and req.KeepOnFailure is not true
defer func() {
if err != nil && !req.KeepOnFailure {
derr := client.New().Host.Delete(b.cluster.ListMasterIDs(task), temporal.GetExecutionTimeout())
if derr != nil {
err = scerr.AddConsequence(err, derr)
}
}
}()
_, mastersStatus = mastersTask.Wait()
if mastersStatus != nil {
privateNodesTask.Abort()
return mastersStatus
}
// Step 3: run (not start so no parallelism here) gateway configuration (needs MasterIPs so masters must be installed first)
// Configure Gateway(s) and waits for the result
primaryGatewayTask, err = task.New()
if err != nil {
return err
}
primaryGatewayTask, err = primaryGatewayTask.Start(b.taskConfigureGateway, srvutils.ToPBHost(primaryGateway))
if err != nil {
return err
}
if !gwFailoverDisabled {
secondaryGatewayTask, err = task.New()
if err != nil {
return err
}
secondaryGatewayTask, err = secondaryGatewayTask.Start(b.taskConfigureGateway, srvutils.ToPBHost(secondaryGateway))
if err != nil {
return err
}
}
_, primaryGatewayStatus = primaryGatewayTask.Wait()
if primaryGatewayStatus != nil {
if !gwFailoverDisabled {
if secondaryGatewayTask != nil {
secondaryGatewayTask.Abort()
}
}
return primaryGatewayStatus
}
if !gwFailoverDisabled {
if secondaryGatewayTask != nil {
_, secondaryGatewayStatus = secondaryGatewayTask.Wait()
if secondaryGatewayStatus != nil {
return secondaryGatewayStatus
}
}
}
// Step 4: configure masters (if masters created successfully and gateway configure successfully)
mt, err := task.New()
if err != nil {
return err
}
_, mastersStatus = mt.Run(b.taskConfigureMasters, nil)
if mastersStatus != nil {
return mastersStatus
}
// Starting from here, delete nodes on failure if exits with error and req.KeepOnFailure is false
defer func() {
if err != nil && !req.KeepOnFailure {
clientHost := clientInstance.Host
derr := clientHost.Delete(b.cluster.ListNodeIDs(task), temporal.GetExecutionTimeout())
if derr != nil {
err = scerr.AddConsequence(err, derr)
}
}
}()
// Step 5: awaits nodes creation
_, privateNodesStatus = privateNodesTask.Wait()
if privateNodesStatus != nil {
return privateNodesStatus
}
// Step 6: Starts nodes configuration, if all masters and nodes
// have been created and gateway has been configured with success
pnt, privateNodesStatus := task.New()
if privateNodesStatus != nil {
return privateNodesStatus
}
_, privateNodesStatus = pnt.Run(b.taskConfigureNodes, nil)
if privateNodesStatus != nil {
return privateNodesStatus
}
// At the end, configure cluster as a whole
err = b.configureCluster(task, data.Map{
"PrimaryGateway": primaryGateway,
"SecondaryGateway": secondaryGateway,
})
if err != nil {
return err
}
return nil
}
// complementHostDefinition complements req with default values if needed
func complementHostDefinition(req *pb.HostDefinition, def pb.HostDefinition) *pb.HostDefinition {
var finalDef pb.HostDefinition
if req == nil {
finalDef = def
} else {
finalDef = *req
finalDef.Sizing = &pb.HostSizing{}
*finalDef.Sizing = *req.Sizing
if def.Sizing.MinCpuCount > 0 && finalDef.Sizing.MinCpuCount == 0 {
finalDef.Sizing.MinCpuCount = def.Sizing.MinCpuCount
}
if def.Sizing.MaxCpuCount > 0 && finalDef.Sizing.MaxCpuCount == 0 {
finalDef.Sizing.MaxCpuCount = def.Sizing.MaxCpuCount
}
if def.Sizing.MinRamSize > 0.0 && finalDef.Sizing.MinRamSize == 0.0 {
finalDef.Sizing.MinRamSize = def.Sizing.MinRamSize
}
if def.Sizing.MaxRamSize > 0.0 && finalDef.Sizing.MaxRamSize == 0.0 {
finalDef.Sizing.MaxRamSize = def.Sizing.MaxRamSize
}
if def.Sizing.MinDiskSize > 0 && finalDef.Sizing.MinDiskSize == 0 {
finalDef.Sizing.MinDiskSize = def.Sizing.MinDiskSize
}
if finalDef.Sizing.GpuCount <= 0 && def.Sizing.GpuCount > 0 {
finalDef.Sizing.GpuCount = def.Sizing.GpuCount
}
if finalDef.Sizing.MinCpuFreq == 0 && def.Sizing.MinCpuFreq > 0 {
finalDef.Sizing.MinCpuFreq = def.Sizing.MinCpuFreq
}
if finalDef.ImageId == "" {
finalDef.ImageId = def.ImageId
}
if finalDef.Sizing.MinCpuCount <= 0 {
finalDef.Sizing.MinCpuCount = 2
}
if finalDef.Sizing.MaxCpuCount <= 0 {
finalDef.Sizing.MaxCpuCount = 4
}
if finalDef.Sizing.MinRamSize <= 0.0 {
finalDef.Sizing.MinRamSize = 7.0
}
if finalDef.Sizing.MaxRamSize <= 0.0 {
finalDef.Sizing.MaxRamSize = 16.0
}
if finalDef.Sizing.MinDiskSize <= 0 {
finalDef.Sizing.MinDiskSize = 50
}
}
return &finalDef
}
// GetState returns "actively" the current state of the cluster
func (b *foreman) getState(task concurrency.Task) (ClusterState.Enum, error) {
if b.makers.GetState != nil {
return b.makers.GetState(task, b)
}
return ClusterState.Unknown, fmt.Errorf("no maker defined for 'GetState'")
}
// configureNode ...
func (b *foreman) configureNode(task concurrency.Task, index int, pbHost *pb.Host) error {
if b.makers.ConfigureNode != nil {
return b.makers.ConfigureNode(task, b, index, pbHost)
}
// Not finding a callback isn't an error, so return nil in this case
return nil
}
// unconfigureNode executes what has to be done to remove node from cluster
func (b *foreman) unconfigureNode(task concurrency.Task, hostID string, selectedMasterID string) error {
pbHost, err := client.New().Host.Inspect(hostID, temporal.GetExecutionTimeout())
if err != nil {
return err
}
if b.makers.UnconfigureNode != nil {
return b.makers.UnconfigureNode(task, b, pbHost, selectedMasterID)
}
// Not finding a callback isn't an error, so return nil in this case
return nil
}
// configureMaster ...
func (b *foreman) configureMaster(task concurrency.Task, index int, pbHost *pb.Host) error {
if b.makers.ConfigureNode != nil {
return b.makers.ConfigureMaster(task, b, index, pbHost)
}
// Not finding a callback isn't an error, so return nil in this case
return nil
}
// unconfigureMaster executes what has to be done to remove Master from Cluster
func (b *foreman) unconfigureMaster(task concurrency.Task, pbHost *pb.Host) error {
if b.makers.UnconfigureMaster != nil {
return b.makers.UnconfigureMaster(task, b, pbHost)
}
// Not finding a callback isn't an error, so return nil in this case
return nil
}
// configureCluster ...
// params contains a data.Map with primary and secondary Gateway hosts
func (b *foreman) configureCluster(task concurrency.Task, params concurrency.TaskParameters) (err error) {
tracer := concurrency.NewTracer(task, "", true).GoingIn()
defer tracer.OnExitTrace()()
defer scerr.OnExitLogError(tracer.TraceMessage(""), &err)()
logrus.Infof("[cluster %s] configuring cluster...", b.cluster.Name)
defer func() {
if err == nil {
logrus.Infof("[cluster %s] configuration successful.", b.cluster.Name)
} else {
logrus.Errorf("[cluster %s] configuration failed: %s", b.cluster.Name, err.Error())
}
}()
err = b.createSwarm(task, params)
if err != nil {
return err
}
// Installs reverseproxy feature on cluster (gateways)
err = b.installReverseProxy(task)
if err != nil {
return err
}
// Installs remotedesktop feature on cluster (all masters)
err = b.installRemoteDesktop(task)
if err != nil {
return err
}
// configure what has to be done cluster-wide
if b.makers.ConfigureCluster != nil {
return b.makers.ConfigureCluster(task, b)
}
// Not finding a callback isn't an error, so return nil in this case
return nil
}
func (b *foreman) determineRequiredNodes(task concurrency.Task) (int, int, int) {
if b.makers.MinimumRequiredServers != nil {
return b.makers.MinimumRequiredServers(task, b)
}
return 0, 0, 0
}
// configureCluster configures cluster
func (b *foreman) createSwarm(task concurrency.Task, params concurrency.TaskParameters) (err error) {
if params == nil {
return scerr.InvalidParameterError("params", "cannot be nil")
}
tracer := concurrency.NewTracer(task, "", true).WithStopwatch().GoingIn()
defer tracer.OnExitTrace()()
defer scerr.OnExitLogError(tracer.TraceMessage(""), &err)()
var (
p = data.Map{}
ok bool
primaryGateway, secondaryGateway *resources.Host
)
if p, ok = params.(data.Map); !ok {
return scerr.InvalidParameterError("params", "must be a data.Map")
}
if primaryGateway, ok = p["PrimaryGateway"].(*resources.Host); !ok || primaryGateway == nil {
return scerr.InvalidParameterError("params", "key 'PrimaryGateway' must be defined and cannot be nil")
}
secondaryGateway, ok = p["SecondaryGateway"].(*resources.Host)
if !ok {
logrus.Debugf("secondary gateway not configured")
}
clientInstance := client.New()
clientHost := clientInstance.Host
clientSSH := clientInstance.SSH
cluster := b.cluster
// Join masters in Docker Swarm as managers
joinCmd := ""
for _, hostID := range cluster.ListMasterIDs(task) {
host, err := clientHost.Inspect(hostID, client.DefaultExecutionTimeout)
if err != nil {
return fmt.Errorf("failed to get metadata of host: %s", err.Error())
}
if joinCmd == "" {
retcode, _, _, err := clientSSH.Run(hostID, "docker swarm init && docker node update "+host.Name+" --label-add safescale.host.role=master",
client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to init docker swarm")
}
retcode, token, stderr, err := clientSSH.Run(hostID, "docker swarm join-token manager -q", client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to generate token to join swarm as manager: %s", stderr)
}
token = strings.Trim(token, "\n")
joinCmd = fmt.Sprintf("docker swarm join --token %s %s", token, host.PrivateIp)
} else {
masterJoinCmd := joinCmd + " && docker node update " + host.Name + " --label-add safescale.host.role=master"
retcode, _, stderr, err := clientSSH.Run(hostID, masterJoinCmd, client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to join host '%s' to swarm as manager: %s", host.Name, stderr)
}
}
}
selectedMasterID, err := b.Cluster().FindAvailableMaster(task)
if err != nil {
return fmt.Errorf("failed to find an available docker manager: %v", err)
}
selectedMaster, err := clientHost.Inspect(selectedMasterID, client.DefaultExecutionTimeout)
if err != nil {
return fmt.Errorf("failed to get metadata of docker manager: %s", err.Error())
}
// build command to join Docker Swarm as workers
joinCmd, err = b.getSwarmJoinCommand(task, selectedMaster, true)
if err != nil {
return err
}
// Join private node in Docker Swarm as workers
for _, hostID := range cluster.ListNodeIDs(task) {
host, err := clientHost.Inspect(hostID, client.DefaultExecutionTimeout)
if err != nil {
return fmt.Errorf("failed to get metadata of host: %s", err.Error())
}
retcode, _, stderr, err := clientSSH.Run(hostID, joinCmd, client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to join host '%s' to swarm as worker: %s", host.Name, stderr)
}
labelCmd := "docker node update " + host.Name + " --label-add safescale.host.role=node"
retcode, _, stderr, err = clientSSH.Run(selectedMaster.Id, labelCmd, client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to label swarm worker '%s' as node: %s", host.Name, stderr)
}
}
// Join gateways in Docker Swarm as workers
retcode, _, stderr, err := clientSSH.Run(primaryGateway.ID, joinCmd, client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to join host '%s' to swarm as worker: %s", primaryGateway.Name, stderr)
}
labelCmd := "docker node update " + primaryGateway.Name + " --label-add safescale.host.role=gateway"
retcode, _, stderr, err = clientSSH.Run(selectedMaster.Id, labelCmd, client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to label docker Swarm worker '%s' as gateway: %s", primaryGateway.Name, stderr)
}
if secondaryGateway != nil {
retcode, _, stderr, err := clientSSH.Run(secondaryGateway.ID, joinCmd, client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to join host '%s' to swarm as worker: %s", primaryGateway.Name, stderr)
}
labelCmd := "docker node update " + secondaryGateway.Name + " --label-add safescale.host.role=gateway"
retcode, _, stderr, err = clientSSH.Run(selectedMaster.Id, labelCmd, client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return fmt.Errorf("failed to label docker swarm worker '%s' as gateway: %s", secondaryGateway.Name, stderr)
}
}
return nil
}
// getSwarmJoinCommand builds the command to obtain swarm token
func (b *foreman) getSwarmJoinCommand(task concurrency.Task, selectedMaster *pb.Host, worker bool) (string, error) {
clientInstance := client.New()
var memberType string
if worker {
memberType = "worker"
} else {
memberType = "manager"
}
tokenCmd := fmt.Sprintf("docker swarm join-token %s -q", memberType)
retcode, token, stderr, err := clientInstance.SSH.Run(selectedMaster.Id, tokenCmd, client.DefaultConnectionTimeout, client.DefaultExecutionTimeout)
if err != nil || retcode != 0 {
return "", fmt.Errorf("failed to generate token to join swarm as worker: %s", stderr)
}
token = strings.Trim(token, "\n")
return fmt.Sprintf("docker swarm join --token %s %s", token, selectedMaster.PrivateIp), nil
}
// uploadTemplateToFile uploads a template named 'tmplName' coming from rice 'box' in a file to a remote host
func uploadTemplateToFile(
box *rice.Box, funcMap map[string]interface{}, tmplName string, data map[string]interface{},
hostID string, fileName string,
) (string, error) {
if box == nil {
return "", scerr.InvalidParameterError("box", "cannot be nil!")
}
host, err := client.New().Host.Inspect(hostID, temporal.GetExecutionTimeout())
if err != nil {
return "", fmt.Errorf("failed to get host information: %s", err)
}
tmplString, err := box.String(tmplName)
if err != nil {
return "", fmt.Errorf("failed to load template: %s", err.Error())
}
tmplCmd, err := txttmpl.New(fileName).Funcs(template.MergeFuncs(funcMap, false)).Parse(tmplString)
if err != nil {
return "", fmt.Errorf("failed to parse template: %s", err.Error())
}
dataBuffer := bytes.NewBufferString("")
err = tmplCmd.Execute(dataBuffer, data)
if err != nil {
return "", fmt.Errorf("failed to realize template: %s", err.Error())
}
cmd := dataBuffer.String()
remotePath := srvutils.TempFolder + "/" + fileName
err = install.UploadStringToRemoteFile(cmd, host, remotePath, "", "", "")
if err != nil {
return "", err
}
return remotePath, nil
}
// configureNodesFromList configures nodes from a list
func (b *foreman) configureNodesFromList(task concurrency.Task, hosts []string) (err error) {
tracer := concurrency.NewTracer(task, "", true).GoingIn()
defer tracer.OnExitTrace()()
defer scerr.OnExitLogError(tracer.TraceMessage(""), &err)()
var (
host *pb.Host
hostID string
errs []string
)
var subtasks []concurrency.Task
clientHost := client.New().Host
length := len(hosts)
for i := 0; i < length; i++ {
host, err = clientHost.Inspect(hosts[i], temporal.GetExecutionTimeout())
if err != nil {
break
}
subtask, err := task.New()
if err != nil {
break
}
subtask, err = subtask.Start(b.taskConfigureNode, data.Map{
"index": i + 1,
"host": host,
})
if err != nil {
break
}
subtasks = append(subtasks, subtask)
}
// Deals with the metadata read failure
if err != nil {
errs = append(errs, "failed to get metadata of host '%s': %s", hostID, err.Error())
}
for _, s := range subtasks {
_, state := s.Wait()
if state != nil {
errs = append(errs, state.Error())
}
}
if len(errs) > 0 {
return fmt.Errorf(strings.Join(errs, "\n"))
}
return nil
}
// joinNodesFromList makes nodes from a list join the cluster
func (b *foreman) joinNodesFromList(task concurrency.Task, hosts []string) error {