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instances.go
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/
instances.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 InstancesCmd struct {
ui boshui.UI
director boshdir.Director
parallel int
}
func NewInstancesCmd(ui boshui.UI, director boshdir.Director, parallel int) InstancesCmd {
return InstancesCmd{ui: ui, director: director, parallel: parallel}
}
func (c InstancesCmd) Run(opts InstancesOpts) error {
instTable := InstanceTable{
Processes: opts.Processes,
Details: opts.Details,
DNS: opts.DNS,
Vitals: opts.Vitals,
}
if len(opts.Deployment) > 0 {
dep, err := c.director.FindDeployment(opts.Deployment)
if err != nil {
return err
}
instanceInfos, err := dep.InstanceInfos()
if err != nil {
return err
}
c.printDeployment(dep, instTable, opts, instanceInfos)
return nil
}
return c.printDeployments(instTable, opts)
}
func (c InstancesCmd) printDeployments(instTable InstanceTable, opts InstancesOpts) error {
deployments, err := c.director.Deployments()
if err != nil {
return err
}
instanceInfos, err := parallelInstanceInfos(deployments, c.parallel)
for _, dep := range deployments {
if instanceInfo, ok := instanceInfos[dep.Name()]; ok {
c.printDeployment(dep, instTable, opts, instanceInfo)
}
}
return err
}
func parallelInstanceInfos(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() {
instanceInfos, err := dep.InstanceInfos()
errorc <- err
resultc <- deploymentInfo{dep.Name(), instanceInfos}
}
}
throttler, err := workpool.NewThrottler(parallel, works)
if err != nil {
return nil, err
}
throttler.Work()
vms := make(map[string][]boshdir.VMInfo, workSize)
var instanceInfoErrors []error
for i := 0; i < workSize; i++ {
errc := <-errorc
result := <-resultc
if errc != nil {
instanceInfoErrors = append(instanceInfoErrors, errc)
} else {
vms[result.depName] = result.vmInfos
}
}
if len(instanceInfoErrors) > 0 {
err = bosherr.NewMultiError(instanceInfoErrors...)
}
return vms, err
}
func (c InstancesCmd) printDeployment(dep boshdir.Deployment, instTable InstanceTable, opts InstancesOpts, instanceInfos []boshdir.VMInfo) {
table := boshtbl.Table{
Title: fmt.Sprintf("Deployment '%s'", dep.Name()),
Content: "instances",
Header: instTable.Headers(),
SortBy: []boshtbl.ColumnSort{
{Column: 0, Asc: true},
{Column: 1, Asc: true}, // sort by process so that VM row is first
},
}
for _, info := range instanceInfos {
if opts.Failing && info.IsRunning() {
continue
}
row := instTable.AsValues(instTable.ForVMInfo(info))
section := boshtbl.Section{
FirstColumn: row[0],
Rows: [][]boshtbl.Value{row},
}
if opts.Processes {
for _, p := range info.Processes {
if opts.Failing && p.IsRunning() {
continue
}
row := instTable.AsValues(instTable.ForProcess(p))
section.Rows = append(section.Rows, row)
}
}
table.Sections = append(table.Sections, section)
}
c.ui.PrintTable(table)
}