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Merge pull request #90215 from jasimmons/pr_agnhost_netexec_http

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Adds HTTPS logic to agnhost netexec
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Kubernetes Prow Robot 2020-05-05 18:01:09 -07:00 committed by GitHub
commit 8e3766f2a8
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4 changed files with 32 additions and 8 deletions
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8
test/images/agnhost/README.md
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@ -375,7 +375,7 @@ HTTP server:
### netexec
Starts a HTTP server on given port with the following endpoints:
Starts a HTTP(S) server on given port with the following endpoints:
- `/`: Returns the request's timestamp.
- `/clientip`: Returns the request's IP address.
@ -407,6 +407,10 @@ Starts a HTTP server on given port with the following endpoints:
Returns a JSON with the fields `output` (containing the file's name on the server) and
`error` containing any potential server side errors.
If `--tls-cert-file` is added (ideally in conjunction with `--tls-private-key-file`, the HTTP server
will be upgraded to HTTPS. The image has default, `localhost`-based cert/privkey files at
`/localhost.crt` and `/localhost.key` (see: [`porter` subcommand](#porter))
It will also start a UDP server on the indicated UDP port that responds to the following commands:
- `hostname`: Returns the server's hostname
@ -419,7 +423,7 @@ responding to the same commands as the UDP server.
Usage:
```console
kubectl exec test-agnhost -- /agnhost netexec [--http-port <http-port>] [--udp-port <udp-port>] [--sctp-port <sctp-port>]
kubectl exec test-agnhost -- /agnhost netexec [--http-port <http-port>] [--udp-port <udp-port>] [--sctp-port <sctp-port>] [--tls-cert-file <cert-file>] [--tls-private-key-file <privkey-file>]
```
### nettest

2
test/images/agnhost/VERSION
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@ -1 +1 @@
2.14
2.15

2
test/images/agnhost/agnhost.go
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@ -49,7 +49,7 @@ import (
)
func main() {
rootCmd := &cobra.Command{Use: "app", Version: "2.14"}
rootCmd := &cobra.Command{Use: "app", Version: "2.15"}
rootCmd.AddCommand(auditproxy.CmdAuditProxy)
rootCmd.AddCommand(connect.CmdConnect)

28
test/images/agnhost/netexec/netexec.go
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@ -44,13 +44,15 @@ var (
sctpPort = -1
shellPath = "/bin/sh"
serverReady = &atomicBool{0}
certFile = ""
privKeyFile = ""
)
// CmdNetexec is used by agnhost Cobra.
var CmdNetexec = &cobra.Command{
Use: "netexec",
Short: "Creates HTTP, UDP, and (optionally) SCTP servers with various endpoints",
Long: `Starts a HTTP server on given port with the following endpoints:
Short: "Creates HTTP(S), UDP, and (optionally) SCTP servers with various endpoints",
Long: `Starts a HTTP(S) server on given port with the following endpoints:
- /: Returns the request's timestamp.
- /clientip: Returns the request's IP address.
@ -97,6 +99,10 @@ responding to the same commands as the UDP server.
func init() {
CmdNetexec.Flags().IntVar(&httpPort, "http-port", 8080, "HTTP Listen Port")
CmdNetexec.Flags().StringVar(&certFile, "tls-cert-file", "",
"File containing an x509 certificate for HTTPS. (CA cert, if any, concatenated after server cert)")
CmdNetexec.Flags().StringVar(&privKeyFile, "tls-private-key-file", "",
"File containing an x509 private key matching --tls-cert-file")
CmdNetexec.Flags().IntVar(&udpPort, "udp-port", 8081, "UDP Listen Port")
CmdNetexec.Flags().IntVar(&sctpPort, "sctp-port", -1, "SCTP Listen Port")
}
@ -125,10 +131,17 @@ func main(cmd *cobra.Command, args []string) {
if sctpPort != -1 {
go startSCTPServer(sctpPort)
}
startHTTPServer(httpPort)
addRoutes()
if len(certFile) > 0 {
// only start HTTPS server if a cert is provided
startHTTPSServer(httpPort, certFile, privKeyFile)
} else {
startHTTPServer(httpPort)
}
}
func startHTTPServer(httpPort int) {
func addRoutes() {
http.HandleFunc("/", rootHandler)
http.HandleFunc("/clientip", clientIPHandler)
http.HandleFunc("/echo", echoHandler)
@ -141,6 +154,13 @@ func startHTTPServer(httpPort int) {
// older handlers
http.HandleFunc("/hostName", hostNameHandler)
http.HandleFunc("/shutdown", shutdownHandler)
}
func startHTTPSServer(httpsPort int, certFile, privKeyFile string) {
log.Fatal(http.ListenAndServeTLS(fmt.Sprintf(":%d", httpPort), certFile, privKeyFile, nil))
}
func startHTTPServer(httpPort int) {
log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", httpPort), nil))
}