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// Copyright (c) 2020, Control Command Inc. All rights reserved.
// Copyright (c) 2019-2023, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package singularity
import (
"fmt"
"os"
"sort"
"text/tabwriter"
scslibclient "github.com/sylabs/scs-library-client/client"
"github.com/sylabs/singularity/v4/internal/pkg/client/library"
"github.com/sylabs/singularity/v4/internal/pkg/remote"
"github.com/sylabs/singularity/v4/internal/pkg/remote/endpoint"
"github.com/sylabs/singularity/v4/pkg/sylog"
"golang.org/x/text/cases"
"golang.org/x/text/language"
)
const statusLine = "%s\t%s\t%s\t%s\n"
type status struct {
name string
uri string
status string
version string
}
// RemoteStatus checks status of services related to an endpoint
// If the supplied remote name is an empty string, it will attempt
// to use the default remote.
func RemoteStatus(usrConfigFile, name string) (err error) {
if name != "" {
sylog.Infof("Checking status of remote: %s", name)
} else {
sylog.Infof("Checking status of default remote.")
}
// opening config file
file, err := os.OpenFile(usrConfigFile, os.O_RDONLY|os.O_CREATE, 0o600)
if err != nil {
if os.IsNotExist(err) {
return fmt.Errorf("no remote configurations")
}
return fmt.Errorf("while opening remote config file: %s", err)
}
defer file.Close()
// read file contents to config struct
c, err := remote.ReadFrom(file)
if err != nil {
return fmt.Errorf("while parsing remote config data: %s", err)
}
if err := syncSysConfig(c); err != nil {
return err
}
var e *endpoint.Config
if name == "" {
e, err = c.GetDefault()
} else {
e, err = c.GetRemote(name)
}
if err != nil {
return err
}
sps, err := e.GetAllServices()
if err != nil {
return fmt.Errorf("while retrieving services: %s", err)
}
ch := make(chan *status)
for name, sp := range sps {
name := name
for _, service := range sp {
service := service
go func() {
ch <- doStatusCheck(name, service)
}()
}
}
// map storing statuses by name
smap := make(map[string]*status)
for _, sp := range sps {
for range sp {
s := <-ch
if s == nil {
continue
}
smap[s.name] = s
}
}
// list in alphanumeric order
names := make([]string, 0, len(smap))
for n := range smap {
names = append(names, n)
}
sort.Strings(names)
tw := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
fmt.Fprintf(tw, statusLine, "SERVICE", "STATUS", "VERSION", "URI")
for _, n := range names {
s := smap[n]
fmt.Fprintf(tw, statusLine, cases.Title(language.English).String(s.name), s.status, s.version, s.uri)
}
tw.Flush()
libClientConfigURI := ""
libClientConfig, err := e.LibraryClientConfig(libClientConfigURI)
if err != nil {
return fmt.Errorf("could not get library client configuration: %v", err)
}
printLoggedInIdentity(libClientConfig)
return doTokenCheck(e)
}
func doStatusCheck(name string, sp endpoint.Service) *status {
uri := sp.URI()
version, err := sp.Status()
if err != nil {
if err == endpoint.ErrStatusNotSupported {
return nil
}
return &status{name: name, uri: uri, status: "N/A"}
}
return &status{name: name, uri: uri, status: "OK", version: version}
}
func printLoggedInIdentity(config *scslibclient.Config) {
username, email, err := library.GetIdentity(config)
if err == nil && len(username) > 0 {
fmt.Printf("\nLogged in as: %s <%s>\n\n", username, email)
}
}
func doTokenCheck(e *endpoint.Config) error {
if e.Token == "" {
fmt.Println("\nNo authentication token set (logged out).")
return nil
}
if err := e.VerifyToken(""); err != nil {
fmt.Println("\nAuthentication token is invalid (please login again).")
return err
}
fmt.Println("\nValid authentication token set (logged in).")
return nil
}
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