luzifer/ipt-loadbalancer
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Add settings help for healthchecks

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Signed-off-by: Knut Ahlers <knut@ahlers.me>
This commit is contained in:
Knut Ahlers 2023-11-14 14:45:55 +01:00
parent 40590071d9
commit 14e437b11e
Signed by: luzifer
GPG key ID: D91C3E91E4CAD6F5
5 changed files with 92 additions and 5 deletions
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12
README.md
View file

@ -9,6 +9,15 @@ Usage of ipt-loadbalancer:
-e, --enable-managed-chain Modify PREROUTING / POSTROUTING chain to contain a jump to managed chain
--log-level string Log level (debug, info, warn, error, fatal) (default "info")
--version Prints current version and exits
# ipt-loadbalancer help
Supported sub-commands are:
checkhelp <checkType> Display available settings for a check
# ipt-loadbalancer checkhelp http
Setting Default Description
code 200 HTTP Status-Code to expect from the request
...
```
### Main Configuration File
@ -47,7 +56,8 @@ healthCheck:
# in parallel
interval: 2s
# Settings defines parameters for the given health-check and are
# individual to the type.
# individual to the type. See the `checkhelp <type>` subcommand for
# all supported settings and their default values.
settings:
insecureTLS: true
path: /healthz

42
cli_checkhelp.go Normal file
View file

@ -0,0 +1,42 @@
package main
import (
"fmt"
"git.luzifer.io/luzifer/ipt-loadbalancer/pkg/healthcheck"
"github.com/Luzifer/go_helpers/v2/cli"
"github.com/fatih/color"
"github.com/rodaine/table"
)
func init() {
registry.Add(cli.RegistryEntry{
Description: "Display available settings for a check",
Name: "checkhelp",
Params: []string{"<checkType>"},
Run: func(args []string) error {
if len(args[1:]) < 1 {
return fmt.Errorf("usage: checkhelp <checkType>")
}
check := healthcheck.ByName(args[1])
if check == nil {
return fmt.Errorf("check %q not found", args[1])
}
headerFmt := color.New(color.FgGreen, color.Underline).SprintfFunc()
columnFmt := color.New(color.FgYellow).SprintfFunc()
tbl := table.New("Setting", "Default", "Description")
tbl.WithHeaderFormatter(headerFmt).WithFirstColumnFormatter(columnFmt)
for _, help := range check.Help() {
tbl.AddRow(help.Name, help.Default, help.Description)
}
tbl.Print()
return nil
},
})
}

9
go.mod
View file

@ -6,16 +6,23 @@ require (
github.com/Luzifer/go_helpers/v2 v2.21.0
github.com/Luzifer/rconfig/v2 v2.4.0
github.com/coreos/go-iptables v0.7.0
github.com/fatih/color v1.16.0
github.com/pkg/errors v0.9.1
github.com/rodaine/table v1.1.0
github.com/sirupsen/logrus v1.9.3
gopkg.in/yaml.v3 v3.0.1
)
require (
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-isatty v0.0.20 // indirect
)
require (
github.com/kr/pretty v0.3.1 // indirect
github.com/mitchellh/hashstructure/v2 v2.0.2
github.com/spf13/pflag v1.0.5 // indirect
golang.org/x/sys v0.13.0 // indirect
golang.org/x/sys v0.14.0 // indirect
gopkg.in/validator.v2 v2.0.0-20210331031555-b37d688a7fb0 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
)

20
go.sum
View file

@ -8,10 +8,21 @@ github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ3
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
github.com/mitchellh/hashstructure/v2 v2.0.2 h1:vGKWl0YJqUNxE8d+h8f6NJLcCJrgbhC4NcD46KavDd4=
github.com/mitchellh/hashstructure/v2 v2.0.2/go.mod h1:MG3aRVU/N29oo/V/IhBX8GR/zz4kQkprJgF2EVszyDE=
github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
@ -19,6 +30,8 @@ github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/rodaine/table v1.1.0 h1:/fUlCSdjamMY8VifdQRIu3VWZXYLY7QHFkVorS8NTr4=
github.com/rodaine/table v1.1.0/go.mod h1:Qu3q5wi1jTQD6B6HsP6szie/S4w1QUQ8pq22pz9iL8g=
github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
@ -26,12 +39,15 @@ github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVs
github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=

14
main.go
View file

@ -9,6 +9,7 @@ import (
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/Luzifer/go_helpers/v2/cli"
"github.com/Luzifer/rconfig/v2"
)
@ -20,7 +21,8 @@ var (
VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"`
}{}
version = "dev"
registry = cli.New()
version = "dev"
)
func initApp() error {
@ -49,6 +51,16 @@ func main() {
os.Exit(0)
}
if len(rconfig.Args()) > 1 {
if err = registry.Call(rconfig.Args()[1:]); err != nil {
if errors.Is(err, cli.ErrHelpCalled) {
os.Exit(1)
}
logrus.WithError(err).Fatal("executing sub-command")
}
os.Exit(0)
}
confFile, err := config.Load(cfg.Config)
if err != nil {
logrus.WithError(err).Fatal("loading config file")