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cmd: Eliminate unintended use of cgo

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This means the stop command can only use the API to stop the instance;
no more signaling, unless we find a cgo-free way of doing it.
This commit is contained in:
Matthew Holt 2019-12-23 12:41:05 -07:00
parent 724c728678
commit cbb405f6aa
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GPG key ID: 2A349DD577D586A5
4 changed files with 5 additions and 36 deletions
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28
cmd/commandfuncs.go
View file

@ -33,7 +33,6 @@ import (
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/caddy/v2/caddyconfig"
"github.com/keybase/go-ps"
"github.com/mholt/certmagic"
"go.uber.org/zap"
)
@ -211,34 +210,11 @@ func cmdStop(fl Flags) (int, error) {
err = apiRequest(req)
if err != nil {
// if the caddy instance doesn't have an API listener set up,
// or we are unable to reach it for some reason, try signaling it
caddy.Log().Warn("unable to use API to stop instance; will try to signal the process",
caddy.Log().Warn("failed using API to stop instance",
zap.String("endpoint", stopEndpoint),
zap.Error(err),
)
processList, err := ps.Processes()
if err != nil {
return caddy.ExitCodeFailedStartup, fmt.Errorf("listing processes: %v", err)
}
thisProcName := getProcessName()
var found bool
for _, p := range processList {
// the process we're looking for should have the same name as us but different PID
if p.Executable() == thisProcName && p.Pid() != os.Getpid() {
found = true
fmt.Printf("pid=%d\n", p.Pid())
if err := gracefullyStopProcess(p.Pid()); err != nil {
return caddy.ExitCodeFailedStartup, err
}
}
}
if !found {
return caddy.ExitCodeFailedStartup, fmt.Errorf("Caddy is not running")
}
return caddy.ExitCodeFailedStartup, err
}
return caddy.ExitCodeSuccess, nil

10
cmd/commands.go
View file

@ -134,13 +134,9 @@ not quit after printing, and can be useful for troubleshooting.`,
Long: `
Stops the background Caddy process as gracefully as possible.
It will first try to use the admin API's /stop endpoint; the address of
this request can be customized using the --address flag if it is not the
default.
If that fails for any reason, it will attempt to signal the first process
it can find named the same as this one (os.Args[0]). On Windows, such
a stop is forceful because Windows does not have signals.`,
It requires that the admin API is enabled and accessible, since it will
use the API's /stop endpoint. The address of this request can be
customized using the --address flag if it is not the default.`,
Flags: func() *flag.FlagSet {
fs := flag.NewFlagSet("stop", flag.ExitOnError)
fs.String("address", "", "The address to use to reach the admin API endpoint, if not the default")

1
go.mod
View file

@ -12,7 +12,6 @@ require (
github.com/ilibs/json5 v1.0.1
github.com/imdario/mergo v0.3.8 // indirect
github.com/jsternberg/zap-logfmt v1.2.0
github.com/keybase/go-ps v0.0.0-20190827175125-91aafc93ba19
github.com/klauspost/compress v1.8.6
github.com/klauspost/cpuid v1.2.2
github.com/lucas-clemente/quic-go v0.14.1

2
go.sum
View file

@ -143,8 +143,6 @@ github.com/jsternberg/zap-logfmt v1.2.0 h1:1v+PK4/B48cy8cfQbxL4FmmNZrjnIMr2BsnyE
github.com/jsternberg/zap-logfmt v1.2.0/go.mod h1:kz+1CUmCutPWABnNkOu9hOHKdT2q3TDYCcsFy9hpqb0=
github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
github.com/keybase/go-ps v0.0.0-20190827175125-91aafc93ba19 h1:WjT3fLi9n8YWh/Ih8Q1LHAPsTqGddPcHqscN+PJ3i68=
github.com/keybase/go-ps v0.0.0-20190827175125-91aafc93ba19/go.mod h1:hY+WOq6m2FpbvyrI93sMaypsttvaIL5nhVR92dTMUcQ=
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
github.com/klauspost/compress v1.8.6 h1:970MQcQdxX7hfgc/aqmB4a3grW0ivUVV6i1TLkP8CiE=
github.com/klauspost/compress v1.8.6/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=