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version.go
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version.go
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/*
Copyright © 2022 Jan Kiesewetter <jan@t3easy.de>
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 2
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 cmd
import (
"encoding/json"
"io"
"net/http"
"strings"
"time"
"github.com/NETWAYS/go-check"
"github.com/spf13/cobra"
"github.com/t3easy/check_traefik/internal"
"golang.org/x/mod/semver"
)
type Version struct {
Version string `json:"Version"`
Codename string `json:"Codename"`
StartDate time.Time `json:"startDate"`
PilotEnabled bool `json:"pilotEnabled"`
}
// versionCmd represents the version command
var (
minVersion string
versionInformation Version
versionCmd = &cobra.Command{
Use: "version",
Short: "Check the version of your Traefik instance",
Version: version,
Run: func(cmd *cobra.Command, args []string) {
var (
req *http.Request
resp *http.Response
err error
b []byte
)
req = internal.NewRequest(http.MethodGet, ip, hostname, ssl, port, path, username, password)
req.Header.Set("Accept", "application/json")
resp = internal.GetResp(req, timeout, insecure)
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
check.Exitf(
check.Unknown,
"%s returned %s",
req.URL.String(),
http.StatusText(resp.StatusCode),
)
}
b, err = io.ReadAll(resp.Body)
if err != nil {
check.ExitError(err)
}
if err = json.Unmarshal(b, &versionInformation); err != nil {
check.ExitError(err)
}
checkVersion(versionInformation.Version, minVersion)
},
}
)
func init() {
rootCmd.AddCommand(versionCmd)
versionCmd.PersistentFlags().StringVarP(&path, "url", "u", "/api/version", "Path of the Traefik API version endpoint")
versionCmd.PersistentFlags().StringVar(&minVersion, "minVersion", "", "Minimum Traefik version")
}
func normalizeVersion(v string) string {
if !strings.HasPrefix(v, "v") {
v = "v" + v
}
if !semver.IsValid(v) {
check.Exitf(
check.Unknown,
"%s is not a valid samver version.",
v,
)
}
return v
}
func checkVersion(v string, minV string) {
var minCompare int
v = normalizeVersion(v)
minV = normalizeVersion(minV)
minCompare = semver.Compare(v, minV)
switch {
case minCompare == -1:
check.Exitf(
check.Critical,
"Traefik version is %s, which is lower than minimum version %s.",
v,
minV,
)
case minCompare == 0:
check.Exitf(
check.OK,
"Traefik version is %s, which equals the minimum version %s.",
v,
minV,
)
case minCompare == 1:
check.Exitf(
check.OK,
"Traefik version is %s, which is higher than the minimum version %s.",
v,
minV,
)
}
}