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instance.go
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instance.go
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package instance
import (
"fmt"
"time"
bicloud "github.com/cloudfoundry/bosh-init/cloud"
bidisk "github.com/cloudfoundry/bosh-init/deployment/disk"
biinstancestate "github.com/cloudfoundry/bosh-init/deployment/instance/state"
bideplmanifest "github.com/cloudfoundry/bosh-init/deployment/manifest"
bisshtunnel "github.com/cloudfoundry/bosh-init/deployment/sshtunnel"
bivm "github.com/cloudfoundry/bosh-init/deployment/vm"
biinstallmanifest "github.com/cloudfoundry/bosh-init/installation/manifest"
bosherr "github.com/cloudfoundry/bosh-init/internal/github.com/cloudfoundry/bosh-utils/errors"
boshlog "github.com/cloudfoundry/bosh-init/internal/github.com/cloudfoundry/bosh-utils/logger"
biui "github.com/cloudfoundry/bosh-init/ui"
)
type Instance interface {
JobName() string
ID() int
Disks() ([]bidisk.Disk, error)
WaitUntilReady(biinstallmanifest.Registry, biui.Stage) error
UpdateDisks(bideplmanifest.Manifest, biui.Stage) ([]bidisk.Disk, error)
UpdateJobs(bideplmanifest.Manifest, biui.Stage) error
Delete(
pingTimeout time.Duration,
pingDelay time.Duration,
stage biui.Stage,
) error
}
type instance struct {
jobName string
id int
vm bivm.VM
vmManager bivm.Manager
sshTunnelFactory bisshtunnel.Factory
stateBuilder biinstancestate.Builder
logger boshlog.Logger
logTag string
}
func NewInstance(
jobName string,
id int,
vm bivm.VM,
vmManager bivm.Manager,
sshTunnelFactory bisshtunnel.Factory,
stateBuilder biinstancestate.Builder,
logger boshlog.Logger,
) Instance {
return &instance{
jobName: jobName,
id: id,
vm: vm,
vmManager: vmManager,
sshTunnelFactory: sshTunnelFactory,
stateBuilder: stateBuilder,
logger: logger,
logTag: "instance",
}
}
func (i *instance) JobName() string {
return i.jobName
}
func (i *instance) ID() int {
return i.id
}
func (i *instance) Disks() ([]bidisk.Disk, error) {
disks, err := i.vm.Disks()
if err != nil {
return disks, bosherr.WrapError(err, "Listing instance disks")
}
return disks, nil
}
func (i *instance) WaitUntilReady(
registryConfig biinstallmanifest.Registry,
stage biui.Stage,
) error {
stepName := fmt.Sprintf("Waiting for the agent on VM '%s' to be ready", i.vm.CID())
err := stage.Perform(stepName, func() error {
if !registryConfig.IsEmpty() {
sshTunnelOptions := bisshtunnel.Options{
Host: registryConfig.SSHTunnel.Host,
Port: registryConfig.SSHTunnel.Port,
User: registryConfig.SSHTunnel.User,
Password: registryConfig.SSHTunnel.Password,
PrivateKey: registryConfig.SSHTunnel.PrivateKey,
LocalForwardPort: registryConfig.Port,
RemoteForwardPort: registryConfig.Port,
}
sshTunnel := i.sshTunnelFactory.NewSSHTunnel(sshTunnelOptions)
sshReadyErrCh := make(chan error)
sshErrCh := make(chan error)
go sshTunnel.Start(sshReadyErrCh, sshErrCh)
defer func() {
if err := sshTunnel.Stop(); err != nil {
i.logger.Warn(i.logTag, "Failed to stop ssh tunnel: %s", err.Error())
}
}()
err := <-sshReadyErrCh
if err != nil {
return bosherr.WrapError(err, "Starting SSH tunnel")
}
}
return i.vm.WaitUntilReady(10*time.Minute, 500*time.Millisecond)
})
return err
}
func (i *instance) UpdateDisks(deploymentManifest bideplmanifest.Manifest, stage biui.Stage) ([]bidisk.Disk, error) {
diskPool, err := deploymentManifest.DiskPool(i.jobName)
if err != nil {
return []bidisk.Disk{}, bosherr.WrapError(err, "Getting disk pool")
}
disks, err := i.vm.UpdateDisks(diskPool, stage)
if err != nil {
return disks, bosherr.WrapError(err, "Updating disks")
}
return disks, nil
}
func (i *instance) UpdateJobs(
deploymentManifest bideplmanifest.Manifest,
stage biui.Stage,
) error {
newState, err := i.stateBuilder.Build(i.jobName, i.id, deploymentManifest, stage)
if err != nil {
return bosherr.WrapErrorf(err, "Building state for instance '%s/%d'", i.jobName, i.id)
}
stepName := fmt.Sprintf("Updating instance '%s/%d'", i.jobName, i.id)
err = stage.Perform(stepName, func() error {
err := i.vm.Stop()
if err != nil {
return bosherr.WrapError(err, "Stopping the agent")
}
err = i.vm.Apply(newState.ToApplySpec())
if err != nil {
return bosherr.WrapError(err, "Applying the agent state")
}
err = i.vm.Start()
if err != nil {
return bosherr.WrapError(err, "Starting the agent")
}
return nil
})
if err != nil {
return err
}
return i.waitUntilJobsAreRunning(deploymentManifest.Update.UpdateWatchTime, stage)
}
func (i *instance) Delete(
pingTimeout time.Duration,
pingDelay time.Duration,
stage biui.Stage,
) error {
vmExists, err := i.vm.Exists()
if err != nil {
return bosherr.WrapErrorf(err, "Checking existance of vm for instance '%s/%d'", i.jobName, i.id)
}
if vmExists {
if err = i.shutdown(pingTimeout, pingDelay, stage); err != nil {
return err
}
}
// non-existent VMs still need to be 'deleted' to clean up related resources owned by the CPI
stepName := fmt.Sprintf("Deleting VM '%s'", i.vm.CID())
return stage.Perform(stepName, func() error {
err := i.vm.Delete()
cloudErr, ok := err.(bicloud.Error)
if ok && cloudErr.Type() == bicloud.VMNotFoundError {
return biui.NewSkipStageError(cloudErr, "VM not found")
}
return err
})
}
func (i *instance) shutdown(
pingTimeout time.Duration,
pingDelay time.Duration,
stage biui.Stage,
) error {
stepName := fmt.Sprintf("Waiting for the agent on VM '%s'", i.vm.CID())
waitingForAgentErr := stage.Perform(stepName, func() error {
if err := i.vm.WaitUntilReady(pingTimeout, pingDelay); err != nil {
return bosherr.WrapError(err, "Agent unreachable")
}
return nil
})
if waitingForAgentErr != nil {
i.logger.Warn(i.logTag, "Gave up waiting for agent: %s", waitingForAgentErr.Error())
return nil
}
if err := i.stopJobs(stage); err != nil {
return err
}
if err := i.unmountDisks(stage); err != nil {
return err
}
return nil
}
func (i *instance) waitUntilJobsAreRunning(updateWatchTime bideplmanifest.WatchTime, stage biui.Stage) error {
start := time.Duration(updateWatchTime.Start) * time.Millisecond
end := time.Duration(updateWatchTime.End) * time.Millisecond
delayBetweenAttempts := 1 * time.Second
maxAttempts := int((end - start) / delayBetweenAttempts)
stepName := fmt.Sprintf("Waiting for instance '%s/%d' to be running", i.jobName, i.id)
return stage.Perform(stepName, func() error {
time.Sleep(start)
return i.vm.WaitToBeRunning(maxAttempts, delayBetweenAttempts)
})
}
func (i *instance) stopJobs(stage biui.Stage) error {
stepName := fmt.Sprintf("Stopping jobs on instance '%s/%d'", i.jobName, i.id)
return stage.Perform(stepName, func() error {
return i.vm.Stop()
})
}
func (i *instance) unmountDisks(stage biui.Stage) error {
disks, err := i.vm.Disks()
if err != nil {
return bosherr.WrapErrorf(err, "Getting VM '%s' disks", i.vm.CID())
}
for _, disk := range disks {
stepName := fmt.Sprintf("Unmounting disk '%s'", disk.CID())
err = stage.Perform(stepName, func() error {
if err := i.vm.UnmountDisk(disk); err != nil {
return bosherr.WrapErrorf(err, "Unmounting disk '%s' from VM '%s'", disk.CID(), i.vm.CID())
}
return nil
})
if err != nil {
return err
}
}
return nil
}