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2017-10-03, Gary Kramlich
345a52ef04c6
closing merged branch
/*
* Convey
* Copyright 2016-2017 Gary Kramlich <grim@reaperworld.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package
docker
import
(
"strings"
"time"
"github.com/aphistic/gomol"
"bitbucket.org/rw_grim/convey/state"
)
type
HealthCheck
struct
{
Command
string
`yaml:"command"`
Interval
time
.
Duration
`yaml:"interval"`
Retries
int
`yaml:"retries"`
StartPeriod
time
.
Duration
`yaml:"start-period"`
Timeout
time
.
Duration
`yaml:"timeout"`
}
const
(
containerHasHealthCheckTemplate
=
`inspect -f "{{.Format}}" {{.Cid}}`
containerHasHealthCheckFormat
=
`{{if .Config.Healthcheck}}true{{else}}false{{end}}`
containerIsHealthyTemplate
=
`inspect -f "{{.Format}}" {{.Cid}}`
containerIsHealthyFormat
=
`{{.State.Health.Status}}`
)
func
containerHasHealthCheck
(
name
,
cid
string
,
st
*
state
.
State
,
logger
*
gomol
.
LogAdapter
)
(
bool
,
error
)
{
params
:=
map
[
string
]
interface
{}{
"Format"
:
containerHasHealthCheckFormat
,
"Cid"
:
cid
,
}
stdout
,
stderr
,
err
:=
DockerOutput
(
name
+
"/healthcheck"
,
containerHasHealthCheckTemplate
,
params
,
st
,
)
if
err
!=
nil
{
logger
.
Error
(
stderr
)
return
false
,
err
}
if
strings
.
TrimSpace
(
stdout
)
==
"true"
{
return
true
,
nil
}
return
false
,
nil
}
func
containerIsHealthy
(
name
,
cid
string
,
st
*
state
.
State
,
logger
*
gomol
.
LogAdapter
)
(
bool
,
error
)
{
params
:=
map
[
string
]
interface
{}{
"Format"
:
containerIsHealthyFormat
,
"Cid"
:
cid
,
}
stdout
,
stderr
,
err
:=
DockerOutput
(
name
+
"/healthcheck"
,
containerIsHealthyTemplate
,
params
,
st
,
)
if
err
!=
nil
{
logger
.
Error
(
stderr
)
return
false
,
err
}
if
strings
.
ToLower
(
strings
.
TrimSpace
(
stdout
))
==
"healthy"
{
return
true
,
err
}
return
false
,
nil
}