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/
unload.go
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/
unload.go
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// Copyright 2014 CoreOS, Inc.
//
// 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 main
import (
"os"
"github.com/coreos/fleet/job"
"github.com/coreos/fleet/log"
)
var (
cmdUnloadUnit = &Command{
Name: "unload",
Summary: "Unschedule one or more units in the cluster.",
Usage: "UNIT...",
Run: runUnloadUnit,
}
)
func init() {
cmdUnloadUnit.Flags.IntVar(&sharedFlags.BlockAttempts, "block-attempts", 0, "Wait until the units are inactive, performing up to N attempts before giving up. A value of 0 indicates no limit.")
cmdUnloadUnit.Flags.BoolVar(&sharedFlags.NoBlock, "no-block", false, "Do not wait until the units have become inactive before exiting.")
}
func runUnloadUnit(args []string) (exit int) {
units, err := findUnits(args)
if err != nil {
stderr("%v", err)
return 1
}
wait := make([]string, 0)
for _, s := range units {
if !suToGlobal(s) {
if job.JobState(s.CurrentState) == job.JobStateInactive {
log.Debugf("Target state of Unit(%s) already %s, skipping.", s.Name, job.JobStateInactive)
continue
}
}
log.Debugf("Setting target state of Unit(%s) to %s", s.Name, job.JobStateInactive)
cAPI.SetUnitTargetState(s.Name, string(job.JobStateInactive))
if suToGlobal(s) {
stdout("Triggered global unit %s unload", s.Name)
} else {
wait = append(wait, s.Name)
}
}
if !sharedFlags.NoBlock {
errchan := waitForUnitStates(wait, job.JobStateInactive, sharedFlags.BlockAttempts, os.Stdout)
for err := range errchan {
stderr("Error waiting for units: %v", err)
exit = 1
}
} else {
for _, name := range wait {
stdout("Triggered unit %s unload", name)
}
}
return
}