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vms.go
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vms.go
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package cmd
import (
"fmt"
"code.cloudfoundry.org/workpool"
boshdir "github.com/cloudfoundry/bosh-cli/director"
boshui "github.com/cloudfoundry/bosh-cli/ui"
boshtbl "github.com/cloudfoundry/bosh-cli/ui/table"
bosherr "github.com/cloudfoundry/bosh-utils/errors"
)
type VMsCmd struct {
ui boshui.UI
director boshdir.Director
parallel int
}
type deploymentInfo struct {
depName string
vmInfos []boshdir.VMInfo
}
func NewVMsCmd(ui boshui.UI, director boshdir.Director, parallel int) VMsCmd {
return VMsCmd{ui: ui, director: director, parallel: parallel}
}
func (c VMsCmd) Run(opts VMsOpts) error {
instTable := InstanceTable{
// VMs command should always show VM specifics
VMDetails: true,
Details: false,
DNS: opts.DNS,
Vitals: opts.Vitals,
CloudProperties: opts.CloudProperties,
}
if len(opts.Deployment) > 0 {
dep, err := c.director.FindDeployment(opts.Deployment)
if err != nil {
return err
}
vmInfos, err := dep.VMInfos()
if err != nil {
return err
}
c.printDeployment(dep, instTable, vmInfos)
return nil
}
return c.printDeployments(instTable, c.parallel)
}
func (c VMsCmd) printDeployments(instTable InstanceTable, parallel int) error {
deployments, err := c.director.Deployments()
if err != nil {
return err
}
vmInfos, err := parallelVMInfos(deployments, parallel)
for _, dep := range deployments {
if vmInfo, ok := vmInfos[dep.Name()]; ok {
c.printDeployment(dep, instTable, vmInfo)
}
}
return err
}
func parallelVMInfos(deployments []boshdir.Deployment, parallel int) (map[string][]boshdir.VMInfo, error) {
if parallel == 0 {
parallel = 1
}
workSize := len(deployments)
resultc := make(chan deploymentInfo, workSize)
errorc := make(chan error, workSize)
defer close(resultc)
defer close(errorc)
works := make([]func(), workSize)
for i, dep := range deployments {
dep := dep
works[i] = func() {
vmInfos, err := dep.VMInfos()
errorc <- err
resultc <- deploymentInfo{dep.Name(), vmInfos}
}
}
throttler, err := workpool.NewThrottler(parallel, works)
if err != nil {
return nil, err
}
throttler.Work()
vms := make(map[string][]boshdir.VMInfo, workSize)
var vmInfoErrors []error
for i := 0; i < workSize; i++ {
errc := <-errorc
result := <-resultc
if errc != nil {
vmInfoErrors = append(vmInfoErrors, errc)
} else {
vms[result.depName] = result.vmInfos
}
}
if len(vmInfoErrors) > 0 {
err = bosherr.NewMultiError(vmInfoErrors...)
}
return vms, err
}
func (c VMsCmd) printDeployment(dep boshdir.Deployment, instTable InstanceTable, vmInfos []boshdir.VMInfo) {
table := boshtbl.Table{
Title: fmt.Sprintf("Deployment '%s'", dep.Name()),
Content: "vms",
Header: instTable.Headers(),
SortBy: []boshtbl.ColumnSort{{Column: 0, Asc: true}},
}
for _, info := range vmInfos {
row := instTable.AsValues(instTable.ForVMInfo(info))
table.Rows = append(table.Rows, row)
}
c.ui.PrintTable(table)
}