forked from k3s-io/k3s
/
server.go
191 lines (166 loc) · 6.25 KB
/
server.go
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package server
import (
"context"
"fmt"
net2 "net"
"os"
"path/filepath"
"strings"
"github.com/rancher/k3s/pkg/netutil"
systemd "github.com/coreos/go-systemd/daemon"
"github.com/pkg/errors"
"github.com/rancher/k3s/pkg/agent"
"github.com/rancher/k3s/pkg/cli/cmds"
"github.com/rancher/k3s/pkg/datadir"
"github.com/rancher/k3s/pkg/rootless"
"github.com/rancher/k3s/pkg/server"
"github.com/rancher/wrangler/pkg/signals"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
"k8s.io/apimachinery/pkg/util/net"
"k8s.io/kubernetes/pkg/master"
"k8s.io/kubernetes/pkg/volume/csi"
_ "github.com/go-sql-driver/mysql" // ensure we have mysql
_ "github.com/lib/pq" // ensure we have postgres
_ "github.com/mattn/go-sqlite3" // ensure we have sqlite
)
func Run(app *cli.Context) error {
if err := cmds.InitLogging(); err != nil {
return err
}
return run(app, &cmds.ServerConfig)
}
func run(app *cli.Context, cfg *cmds.Server) error {
var (
err error
)
if !cfg.DisableAgent && os.Getuid() != 0 && !cfg.Rootless {
return fmt.Errorf("must run as root unless --disable-agent is specified")
}
if cfg.Rootless {
dataDir, err := datadir.LocalHome(cfg.DataDir, true)
if err != nil {
return err
}
cfg.DataDir = dataDir
if err := rootless.Rootless(dataDir); err != nil {
return err
}
}
// If running agent in server, set this so that CSI initializes properly
csi.WaitForValidHostName = !cfg.DisableAgent
serverConfig := server.Config{}
serverConfig.ControlConfig.ClusterSecret = cfg.ClusterSecret
serverConfig.ControlConfig.DataDir = cfg.DataDir
serverConfig.ControlConfig.KubeConfigOutput = cfg.KubeConfigOutput
serverConfig.ControlConfig.KubeConfigMode = cfg.KubeConfigMode
serverConfig.ControlConfig.NoScheduler = cfg.DisableScheduler
serverConfig.Rootless = cfg.Rootless
serverConfig.TLSConfig.HTTPSPort = cfg.HTTPSPort
serverConfig.TLSConfig.HTTPPort = cfg.HTTPPort
for _, san := range knownIPs(cfg.TLSSan) {
addr := net2.ParseIP(san)
if addr != nil {
serverConfig.TLSConfig.KnownIPs = append(serverConfig.TLSConfig.KnownIPs, san)
} else {
serverConfig.TLSConfig.Domains = append(serverConfig.TLSConfig.Domains, san)
}
}
serverConfig.TLSConfig.BindAddress = cfg.BindAddress
serverConfig.ControlConfig.HTTPSPort = cfg.HTTPSPort
serverConfig.ControlConfig.ExtraAPIArgs = cfg.ExtraAPIArgs
serverConfig.ControlConfig.ExtraControllerArgs = cfg.ExtraControllerArgs
serverConfig.ControlConfig.ExtraSchedulerAPIArgs = cfg.ExtraSchedulerArgs
serverConfig.ControlConfig.ClusterDomain = cfg.ClusterDomain
serverConfig.ControlConfig.StorageEndpoint = cfg.StorageEndpoint
serverConfig.ControlConfig.StorageBackend = cfg.StorageBackend
serverConfig.ControlConfig.StorageCAFile = cfg.StorageCAFile
serverConfig.ControlConfig.StorageCertFile = cfg.StorageCertFile
serverConfig.ControlConfig.StorageKeyFile = cfg.StorageKeyFile
serverConfig.ControlConfig.AdvertiseIP = cfg.AdvertiseIP
serverConfig.ControlConfig.AdvertisePort = cfg.AdvertisePort
serverConfig.ControlConfig.BootstrapType = cfg.BootstrapType
if cmds.AgentConfig.FlannelIface != "" && cmds.AgentConfig.NodeIP == "" {
cmds.AgentConfig.NodeIP = netutil.GetIPFromInterface(cmds.AgentConfig.FlannelIface)
}
if serverConfig.ControlConfig.AdvertiseIP == "" && cmds.AgentConfig.NodeIP != "" {
serverConfig.ControlConfig.AdvertiseIP = cmds.AgentConfig.NodeIP
}
if serverConfig.ControlConfig.AdvertiseIP != "" {
serverConfig.TLSConfig.KnownIPs = append(serverConfig.TLSConfig.KnownIPs, serverConfig.ControlConfig.AdvertiseIP)
}
_, serverConfig.ControlConfig.ClusterIPRange, err = net2.ParseCIDR(cfg.ClusterCIDR)
if err != nil {
return errors.Wrapf(err, "Invalid CIDR %s: %v", cfg.ClusterCIDR, err)
}
_, serverConfig.ControlConfig.ServiceIPRange, err = net2.ParseCIDR(cfg.ServiceCIDR)
if err != nil {
return errors.Wrapf(err, "Invalid CIDR %s: %v", cfg.ServiceCIDR, err)
}
_, apiServerServiceIP, err := master.DefaultServiceIPRange(*serverConfig.ControlConfig.ServiceIPRange)
if err != nil {
return err
}
serverConfig.TLSConfig.KnownIPs = append(serverConfig.TLSConfig.KnownIPs, apiServerServiceIP.String())
// If cluster-dns CLI arg is not set, we set ClusterDNS address to be ServiceCIDR network + 10,
// i.e. when you set service-cidr to 192.168.0.0/16 and don't provide cluster-dns, it will be set to 192.168.0.10
if cfg.ClusterDNS == "" {
serverConfig.ControlConfig.ClusterDNS = make(net2.IP, 4)
copy(serverConfig.ControlConfig.ClusterDNS, serverConfig.ControlConfig.ServiceIPRange.IP.To4())
serverConfig.ControlConfig.ClusterDNS[3] = 10
} else {
serverConfig.ControlConfig.ClusterDNS = net2.ParseIP(cfg.ClusterDNS)
}
if serverConfig.ControlConfig.StorageBackend != "etcd3" {
serverConfig.ControlConfig.NoLeaderElect = true
}
for _, noDeploy := range app.StringSlice("no-deploy") {
if noDeploy == "servicelb" {
serverConfig.DisableServiceLB = true
continue
}
if !strings.HasSuffix(noDeploy, ".yaml") {
noDeploy = noDeploy + ".yaml"
}
serverConfig.ControlConfig.Skips = append(serverConfig.ControlConfig.Skips, noDeploy)
}
logrus.Info("Starting k3s ", app.App.Version)
notifySocket := os.Getenv("NOTIFY_SOCKET")
os.Unsetenv("NOTIFY_SOCKET")
ctx := signals.SetupSignalHandler(context.Background())
certs, err := server.StartServer(ctx, &serverConfig)
if err != nil {
return err
}
logrus.Info("k3s is up and running")
if notifySocket != "" {
os.Setenv("NOTIFY_SOCKET", notifySocket)
systemd.SdNotify(true, "READY=1\n")
}
if cfg.DisableAgent {
<-ctx.Done()
return nil
}
ip := serverConfig.TLSConfig.BindAddress
if ip == "" {
ip = "localhost"
}
url := fmt.Sprintf("https://%s:%d", ip, serverConfig.TLSConfig.HTTPSPort)
token := server.FormatToken(serverConfig.ControlConfig.Runtime.NodeToken, certs)
agentConfig := cmds.AgentConfig
agentConfig.Debug = app.GlobalBool("bool")
agentConfig.DataDir = filepath.Dir(serverConfig.ControlConfig.DataDir)
agentConfig.ServerURL = url
agentConfig.Token = token
agentConfig.Labels = append(agentConfig.Labels, "node-role.kubernetes.io/master=true")
agentConfig.DisableLoadBalancer = true
return agent.Run(ctx, agentConfig)
}
func knownIPs(ips []string) []string {
ips = append(ips, "127.0.0.1")
ip, err := net.ChooseHostInterface()
if err == nil {
ips = append(ips, ip.String())
}
return ips
}