Andrey Smirnov 3a93e65b54 feat: make osd.Dmesg API streaming
This is to prepare for upcoming switch to reading `/dev/kmsg` which
should allow following logs, doing some kind of tail, etc.

The output is far from being perfect, as `dmesg` data is delivered as
single chunk (not as lines), but once server side updates, client side
should match it.

Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
2019-12-09 23:52:35 +03:00

118 lines
3.2 KiB
Go

// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package main
import (
"flag"
"log"
"regexp"
"strings"
"github.com/talos-systems/grpc-proxy/proxy"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"github.com/talos-systems/talos/internal/app/apid/pkg/backend"
"github.com/talos-systems/talos/internal/app/apid/pkg/director"
"github.com/talos-systems/talos/internal/app/apid/pkg/provider"
"github.com/talos-systems/talos/internal/pkg/runtime"
"github.com/talos-systems/talos/pkg/config"
"github.com/talos-systems/talos/pkg/constants"
"github.com/talos-systems/talos/pkg/grpc/factory"
"github.com/talos-systems/talos/pkg/startup"
)
var (
configPath *string
endpoints *string
)
func init() {
log.SetFlags(log.Lshortfile | log.Ldate | log.Lmicroseconds | log.Ltime)
configPath = flag.String("config", "", "the path to the config")
endpoints = flag.String("endpoints", "", "the IPs of the control plane nodes")
flag.Parse()
}
func main() {
if err := startup.RandSeed(); err != nil {
log.Fatalf("failed to seed RNG: %v", err)
}
config, err := loadConfig()
if err != nil {
log.Fatalf("open config: %v", err)
}
tlsConfig, err := provider.NewTLSConfig(config, strings.Split(*endpoints, ","))
if err != nil {
log.Fatalf("failed to create remote certificate provider: %+v", err)
}
serverTLSConfig, err := tlsConfig.ServerConfig()
if err != nil {
log.Fatalf("failed to create OS-level TLS configuration: %v", err)
}
clientTLSConfig, err := tlsConfig.ClientConfig()
if err != nil {
log.Fatalf("failed to create client TLS config: %v", err)
}
backendFactory := backend.NewAPIDFactory(clientTLSConfig)
router := director.NewRouter(backendFactory.Get)
router.RegisterLocalBackend("os.OS", backend.NewLocal("osd", constants.OSSocketPath))
router.RegisterLocalBackend("machine.Machine", backend.NewLocal("machined", constants.MachineSocketPath))
router.RegisterLocalBackend("time.Time", backend.NewLocal("timed", constants.TimeSocketPath))
router.RegisterLocalBackend("network.Network", backend.NewLocal("networkd", constants.NetworkSocketPath))
// all existing streaming methods
for _, methodName := range []string{
"/machine.Machine/CopyOut",
"/machine.Machine/Kubeconfig",
"/machine.Machine/LS",
"/machine.Machine/Logs",
"/machine.Machine/Read",
"/os.OS/Dmesg",
} {
router.RegisterStreamedRegex("^" + regexp.QuoteMeta(methodName) + "$")
}
// register future pattern: method should have suffix "Stream"
router.RegisterStreamedRegex("Stream$")
err = factory.ListenAndServe(
router,
factory.Port(constants.ApidPort),
factory.WithDefaultLog(),
factory.ServerOptions(
grpc.Creds(
credentials.NewTLS(serverTLSConfig),
),
grpc.CustomCodec(proxy.Codec()),
grpc.UnknownServiceHandler(
proxy.TransparentHandler(
router.Director,
proxy.WithStreamedDetector(router.StreamedDetector),
)),
),
)
if err != nil {
log.Fatalf("listen: %v", err)
}
}
func loadConfig() (runtime.Configurator, error) {
content, err := config.FromFile(*configPath)
if err != nil {
return nil, err
}
return config.New(content)
}