func doCreate(c *FleetClient, unit *schema.Unit, wg *sync.WaitGroup, out, ew io.Writer) {
defer wg.Done()
// create unit definition
if err := c.Fleet.CreateUnit(unit); err != nil {
// ignore units that already exist
if err.Error() != "job already exists" {
fmt.Fprintln(ew, err.Error())
return
}
}
desiredState := string(job.JobStateLoaded)
tpl := prettyprint.Colorize("{{.Yellow}}%v:{{.Default}} loaded")
msg := fmt.Sprintf(tpl, unit.Name)
// schedule the unit
if err := c.Fleet.SetUnitTargetState(unit.Name, desiredState); err != nil {
fmt.Fprintln(ew, err)
return
}
// loop until the unit actually exists in unit states
outerLoop:
for {
time.Sleep(250 * time.Millisecond)
unitStates, err := c.Fleet.UnitStates()
if err != nil {
fmt.Fprintln(ew, err)
}
for _, us := range unitStates {
if strings.HasPrefix(us.Name, unit.Name) {
break outerLoop
}
}
}
fmt.Fprintln(out, msg)
}
func doDestroy(c *FleetClient, target string, wg *sync.WaitGroup, out, ew io.Writer) {
defer wg.Done()
// prepare string representation
component, num, err := splitTarget(target)
if err != nil {
fmt.Fprintln(ew, err.Error())
return
}
name, err := formatUnitName(component, num)
if err != nil {
fmt.Fprintln(ew, err.Error())
return
}
tpl := prettyprint.Colorize("{{.Yellow}}%v:{{.Default}} destroyed")
destroyed := fmt.Sprintf(tpl, name)
// tell fleet to destroy the unit
c.Fleet.DestroyUnit(name)
// loop until the unit is actually gone from unit states
outerLoop:
for {
time.Sleep(250 * time.Millisecond)
unitStates, err := c.Fleet.UnitStates()
if err != nil {
fmt.Fprintln(ew, err.Error())
}
for _, us := range unitStates {
if strings.HasPrefix(us.Name, name) {
continue outerLoop
}
}
fmt.Fprintln(out, destroyed)
return
}
}
func doStart(c *FleetClient, target string, wg *sync.WaitGroup, out, ew io.Writer) {
defer wg.Done()
// prepare string representation
component, num, err := splitTarget(target)
if err != nil {
io.WriteString(ew, err.Error())
return
}
name, err := formatUnitName(component, num)
if err != nil {
io.WriteString(ew, err.Error())
return
}
requestState := "launched"
desiredState := "running"
if err := c.Fleet.SetUnitTargetState(name, requestState); err != nil {
io.WriteString(ew, err.Error())
return
}
// start with the likely subState to avoid sending it across the channel
lastSubState := "dead"
for {
// poll for unit states
states, err := c.Fleet.UnitStates()
if err != nil {
io.WriteString(ew, err.Error())
return
}
// FIXME: fleet UnitStates API forces us to iterate for now
var currentState *schema.UnitState
for _, s := range states {
if name == s.Name {
currentState = s
break
}
}
if currentState == nil {
fmt.Fprintf(ew, "Could not find unit: %v\n", name)
return
}
// if subState changed, send it across the output channel
if lastSubState != currentState.SystemdSubState {
l := prettyprint.Overwritef(stateFmt, name, currentState.SystemdActiveState, currentState.SystemdSubState)
fmt.Fprintf(out, l)
}
// break when desired state is reached
if currentState.SystemdSubState == desiredState {
fmt.Fprintln(out)
return
}
lastSubState = currentState.SystemdSubState
if lastSubState == "failed" {
o := prettyprint.Colorize("{{.Red}}The service '%s' failed while starting.{{.Default}}\n")
fmt.Fprintf(ew, o, target)
return
}
time.Sleep(250 * time.Millisecond)
}
}
package fleet
import (
"fmt"
"io"
"sync"
"time"
"github.com/coreos/fleet/schema"
"github.com/deis/deis/pkg/prettyprint"
)
var stateFmt = prettyprint.Colorize("{{.Yellow}}%v:{{.Default}} %v/%v")
// Stop units and wait for their desiredState
func (c *FleetClient) Stop(targets []string, wg *sync.WaitGroup, out, ew io.Writer) {
// expand @* targets
expandedTargets, err := c.expandTargets(targets)
if err != nil {
fmt.Fprintln(ew, err.Error())
return
}
for _, target := range expandedTargets {
wg.Add(1)
go doStop(c, target, wg, out, ew)
}
return
}
func doStop(c *FleetClient, target string, wg *sync.WaitGroup, out, ew io.Writer) {