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495 lines
15 KiB
495 lines
15 KiB
/*
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* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"fmt"
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"io/ioutil"
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"net"
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"net/http"
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"net/url"
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"os"
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"strings"
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"regexp"
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"runtime"
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"github.com/minio/cli"
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)
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var serverFlags = []cli.Flag{
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cli.StringFlag{
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Name: "address",
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Value: ":9000",
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Usage: `Bind to a specific IP:PORT. Defaults to ":9000".`,
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},
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}
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var serverCmd = cli.Command{
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Name: "server",
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Usage: "Start object storage server.",
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Flags: append(serverFlags, globalFlags...),
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Action: serverMain,
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CustomHelpTemplate: `NAME:
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minio {{.Name}} - {{.Usage}}
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USAGE:
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minio {{.Name}} [FLAGS] PATH [PATH...]
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FLAGS:
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{{range .Flags}}{{.}}
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{{end}}
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ENVIRONMENT VARIABLES:
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ACCESS:
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MINIO_ACCESS_KEY: Custom username or access key of 5 to 20 characters in length.
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MINIO_SECRET_KEY: Custom password or secret key of 8 to 40 characters in length.
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BROWSER:
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MINIO_BROWSER: To disable web browser access, set this value to "off".
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EXAMPLES:
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1. Start minio server on "/home/shared" directory.
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$ minio {{.Name}} /home/shared
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2. Start minio server bound to a specific IP:PORT.
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$ minio {{.Name}} --address 192.168.1.101:9000 /home/shared
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3. Start erasure coded minio server on a 12 disks server.
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$ minio {{.Name}} /mnt/export1/ /mnt/export2/ /mnt/export3/ /mnt/export4/ \
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/mnt/export5/ /mnt/export6/ /mnt/export7/ /mnt/export8/ /mnt/export9/ \
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/mnt/export10/ /mnt/export11/ /mnt/export12/
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4. Start erasure coded distributed minio server on a 4 node setup with 1 drive each. Run following commands on all the 4 nodes.
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$ export MINIO_ACCESS_KEY=minio
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$ export MINIO_SECRET_KEY=miniostorage
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$ minio {{.Name}} http://192.168.1.11/mnt/export/ http://192.168.1.12/mnt/export/ \
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http://192.168.1.13/mnt/export/ http://192.168.1.14/mnt/export/
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`,
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}
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type serverCmdConfig struct {
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serverAddr string
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endpoints []*url.URL
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storageDisks []StorageAPI
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}
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// Parse an array of end-points (from the command line)
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func parseStorageEndpoints(eps []string) (endpoints []*url.URL, err error) {
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for _, ep := range eps {
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if ep == "" {
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return nil, errInvalidArgument
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}
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var u *url.URL
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u, err = url.Parse(ep)
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if err != nil {
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return nil, err
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}
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if u.Host != "" {
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_, port, err := net.SplitHostPort(u.Host)
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// Ignore the missing port error as the default port can be globalMinioPort.
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if err != nil && !strings.Contains(err.Error(), "missing port in address") {
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return nil, err
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}
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if globalMinioHost == "" {
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// For ex.: minio server host1:port1 host2:port2...
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// we return error as port is configurable only
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// using "--address :port"
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if port != "" {
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errorIf(fmt.Errorf("Invalid argument %s, port configurable using --address :<port>", u.Host), "")
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return nil, errInvalidArgument
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}
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u.Host = net.JoinHostPort(u.Host, globalMinioPort)
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} else {
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// For ex.: minio server --address host:port host1:port1 host2:port2...
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// i.e if "--address host:port" is specified
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// port info in u.Host is mandatory else return error.
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if port == "" {
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errorIf(fmt.Errorf("Invalid argument %s, port mandatory when --address <host>:<port> is used", u.Host), "")
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return nil, errInvalidArgument
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}
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}
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}
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endpoints = append(endpoints, u)
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}
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return endpoints, nil
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}
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// getListenIPs - gets all the ips to listen on.
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func getListenIPs(serverAddr string) (hosts []string, port string, err error) {
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var host string
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host, port, err = net.SplitHostPort(serverAddr)
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if err != nil {
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return nil, port, fmt.Errorf("Unable to parse host address %s", err)
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}
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if host == "" {
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var ipv4s []net.IP
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ipv4s, err = getInterfaceIPv4s()
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if err != nil {
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return nil, port, fmt.Errorf("Unable reverse sorted ips from hosts %s", err)
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}
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for _, ip := range ipv4s {
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hosts = append(hosts, ip.String())
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}
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return hosts, port, nil
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} // if host != "" {
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// Proceed to append itself, since user requested a specific endpoint.
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hosts = append(hosts, host)
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return hosts, port, nil
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}
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// Finalizes the endpoints based on the host list and port.
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func finalizeEndpoints(tls bool, apiServer *http.Server) (endPoints []string) {
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// Verify current scheme.
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scheme := "http"
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if tls {
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scheme = "https"
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}
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// Get list of listen ips and port.
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hosts, port, err := getListenIPs(apiServer.Addr)
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fatalIf(err, "Unable to get list of ips to listen on")
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// Construct proper endpoints.
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for _, host := range hosts {
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endPoints = append(endPoints, fmt.Sprintf("%s://%s:%s", scheme, host, port))
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}
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// Success.
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return endPoints
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}
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// loadRootCAs fetches CA files provided in minio config and adds them to globalRootCAs
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// Currently under Windows, there is no way to load system + user CAs at the same time
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func loadRootCAs() {
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caFiles := mustGetCAFiles()
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if len(caFiles) == 0 {
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return
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}
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// Get system cert pool, and empty cert pool under Windows because it is not supported
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globalRootCAs = mustGetSystemCertPool()
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// Load custom root CAs for client requests
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for _, caFile := range mustGetCAFiles() {
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caCert, err := ioutil.ReadFile(caFile)
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if err != nil {
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fatalIf(err, "Unable to load a CA file")
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}
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globalRootCAs.AppendCertsFromPEM(caCert)
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}
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}
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// initServerConfig initialize server config.
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func initServerConfig(c *cli.Context) {
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// Create certs path.
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err := createCertsPath()
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fatalIf(err, "Unable to create \"certs\" directory.")
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// Load user supplied root CAs
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loadRootCAs()
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// When credentials inherited from the env, server cmd has to save them in the disk
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if os.Getenv("MINIO_ACCESS_KEY") != "" && os.Getenv("MINIO_SECRET_KEY") != "" {
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// Env credentials are already loaded in serverConfig, just save in the disk
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err = serverConfig.Save()
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fatalIf(err, "Unable to save credentials in the disk.")
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}
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// Set maxOpenFiles, This is necessary since default operating
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// system limits of 1024, 2048 are not enough for Minio server.
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setMaxOpenFiles()
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// Set maxMemory, This is necessary since default operating
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// system limits might be changed and we need to make sure we
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// do not crash the server so the set the maxCacheSize appropriately.
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setMaxMemory()
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// Do not fail if this is not allowed, lower limits are fine as well.
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}
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// Validate if input disks are sufficient for initializing XL.
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func checkSufficientDisks(eps []*url.URL) error {
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// Verify total number of disks.
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total := len(eps)
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if total > maxErasureBlocks {
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return errXLMaxDisks
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}
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if total < minErasureBlocks {
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return errXLMinDisks
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}
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// isEven function to verify if a given number if even.
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isEven := func(number int) bool {
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return number%2 == 0
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}
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// Verify if we have even number of disks.
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// only combination of 4, 6, 8, 10, 12, 14, 16 are supported.
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if !isEven(total) {
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return errXLNumDisks
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}
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// Success.
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return nil
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}
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// Returns if slice of disks is a distributed setup.
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func isDistributedSetup(eps []*url.URL) bool {
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// Validate if one the disks is not local.
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for _, ep := range eps {
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if !isLocalStorage(ep) {
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// One or more disks supplied as arguments are
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// not attached to the local node.
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return true
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}
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}
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return false
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}
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// Check if the endpoints are following expected syntax, i.e
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// valid scheme, valid path across all platforms.
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func checkEndpointsSyntax(eps []*url.URL, disks []string) error {
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for i, u := range eps {
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switch u.Scheme {
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case "":
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// "/" is not allowed.
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if u.Path == "" || u.Path == "/" {
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return fmt.Errorf("Root path is not allowed : %s (%s)", u.Path, disks[i])
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}
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case "http", "https":
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// "http://server1/" is not allowed
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if u.Path == "" || u.Path == "/" || u.Path == "\\" {
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return fmt.Errorf("Root path is not allowed : %s (%s)", u.Path, disks[i])
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}
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default:
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if runtime.GOOS == "windows" {
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// On windows for "C:\export" scheme will be "C"
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matched, err := regexp.MatchString("^[a-zA-Z]$", u.Scheme)
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if err != nil {
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return fmt.Errorf("Invalid scheme : %s (%s), ERROR %s", u.Scheme, disks[i], err)
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}
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if matched {
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break
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}
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}
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return fmt.Errorf("Invalid scheme : %s (%s)", u.Scheme, disks[i])
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}
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}
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return nil
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}
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// Make sure all the command line parameters are OK and exit in case of invalid parameters.
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func checkServerSyntax(c *cli.Context) {
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serverAddr := c.String("address")
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host, portStr, err := net.SplitHostPort(serverAddr)
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fatalIf(err, "Unable to parse %s.", serverAddr)
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// Verify syntax for all the XL disks.
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disks := c.Args()
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endpoints, err := parseStorageEndpoints(disks)
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fatalIf(err, "Unable to parse storage endpoints %s", strings.Join(disks, " "))
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// Validate if endpoints follow the expected syntax.
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err = checkEndpointsSyntax(endpoints, disks)
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fatalIf(err, "Invalid endpoints found %s", strings.Join(disks, " "))
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// Validate for duplicate endpoints are supplied.
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err = checkDuplicateEndpoints(endpoints)
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fatalIf(err, "Duplicate entries in %s", strings.Join(disks, " "))
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if len(endpoints) > 1 {
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// Validate if we have sufficient disks for XL setup.
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err = checkSufficientDisks(endpoints)
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fatalIf(err, "Storage endpoint error.")
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}
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if !isDistributedSetup(endpoints) {
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// for FS and singlenode-XL validation is done, return.
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return
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}
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// Rest of the checks applies only to distributed XL setup.
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if host != "" {
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// We are here implies --address host:port is passed, hence the user is trying
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// to run one minio process per export disk.
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if portStr == "" {
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fatalIf(errInvalidArgument, "Port missing, Host:Port should be specified for --address")
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}
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foundCnt := 0
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for _, ep := range endpoints {
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if ep.Host == serverAddr {
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foundCnt++
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}
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}
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if foundCnt == 0 {
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// --address host:port should be available in the XL disk list.
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fatalIf(errInvalidArgument, "%s is not available in %s", serverAddr, strings.Join(disks, " "))
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}
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if foundCnt > 1 {
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// --address host:port should match exactly one entry in the XL disk list.
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fatalIf(errInvalidArgument, "%s matches % entries in %s", serverAddr, foundCnt, strings.Join(disks, " "))
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}
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}
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tls := isSSL()
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for _, ep := range endpoints {
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if ep.Scheme == "https" && !tls {
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// Certificates should be provided for https configuration.
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fatalIf(errInvalidArgument, "Certificates not provided for https")
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}
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}
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}
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// Checks if any of the endpoints supplied is local to this server.
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func isAnyEndpointLocal(eps []*url.URL) bool {
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anyLocalEp := false
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for _, ep := range eps {
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if isLocalStorage(ep) {
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anyLocalEp = true
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break
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}
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}
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return anyLocalEp
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}
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// serverMain handler called for 'minio server' command.
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func serverMain(c *cli.Context) {
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if !c.Args().Present() || c.Args().First() == "help" {
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cli.ShowCommandHelpAndExit(c, "server", 1)
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}
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// Set global variables after parsing passed arguments
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setGlobalsFromContext(c)
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// Initialization routine, such as config loading, enable logging, ..
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minioInit()
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// Check for minio updates from dl.minio.io
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checkUpdate()
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// Server address.
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serverAddr := c.String("address")
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// Check if requested port is available.
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host, portStr, err := net.SplitHostPort(serverAddr)
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fatalIf(err, "Unable to parse %s.", serverAddr)
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if portStr == "0" || portStr == "" {
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// Port zero or empty means use requested to choose any freely available
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// port. Avoid this since it won't work with any configured clients,
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// can lead to serious loss of availability.
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fatalIf(errInvalidArgument, "Invalid port `%s`, please use `--address` to pick a specific port", portStr)
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}
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globalMinioHost = host
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// Check if requested port is available.
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fatalIf(checkPortAvailability(portStr), "Port unavailable %s", portStr)
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globalMinioPort = portStr
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// Check server syntax and exit in case of errors.
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// Done after globalMinioHost and globalMinioPort is set as parseStorageEndpoints()
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// depends on it.
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checkServerSyntax(c)
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// Disks to be used in server init.
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endpoints, err := parseStorageEndpoints(c.Args())
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fatalIf(err, "Unable to parse storage endpoints %s", c.Args())
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// Should exit gracefully if none of the endpoints passed
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// as command line args are local to this server.
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if !isAnyEndpointLocal(endpoints) {
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fatalIf(errInvalidArgument, "None of the disks passed as command line args are local to this server.")
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}
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storageDisks, err := initStorageDisks(endpoints)
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fatalIf(err, "Unable to initialize storage disk(s).")
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// Cleanup objects that weren't successfully written into the namespace.
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fatalIf(houseKeeping(storageDisks), "Unable to purge temporary files.")
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// Initialize server config.
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initServerConfig(c)
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// First disk argument check if it is local.
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firstDisk := isLocalStorage(endpoints[0])
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// Check if endpoints are part of distributed setup.
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globalIsDistXL = isDistributedSetup(endpoints)
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// Configure server.
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srvConfig := serverCmdConfig{
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serverAddr: serverAddr,
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endpoints: endpoints,
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storageDisks: storageDisks,
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}
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// Configure server.
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handler, err := configureServerHandler(srvConfig)
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fatalIf(err, "Unable to configure one of server's RPC services.")
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// Set nodes for dsync for distributed setup.
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if globalIsDistXL {
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fatalIf(initDsyncNodes(endpoints), "Unable to initialize distributed locking")
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}
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// Initialize name space lock.
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initNSLock(globalIsDistXL)
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// Initialize a new HTTP server.
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apiServer := NewServerMux(serverAddr, handler)
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// If https.
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tls := isSSL()
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// Fetch endpoints which we are going to serve from.
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endPoints := finalizeEndpoints(tls, apiServer.Server)
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// Initialize local server address
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globalMinioAddr = getLocalAddress(srvConfig)
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// Initialize S3 Peers inter-node communication
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initGlobalS3Peers(endpoints)
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// Start server, automatically configures TLS if certs are available.
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go func(tls bool) {
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var lerr error
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cert, key := "", ""
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if tls {
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cert, key = mustGetCertFile(), mustGetKeyFile()
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}
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lerr = apiServer.ListenAndServe(cert, key)
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fatalIf(lerr, "Failed to start minio server.")
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}(tls)
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// Wait for formatting of disks.
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formattedDisks, err := waitForFormatDisks(firstDisk, endpoints, storageDisks)
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fatalIf(err, "formatting storage disks failed")
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// Once formatted, initialize object layer.
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newObject, err := newObjectLayer(formattedDisks)
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fatalIf(err, "intializing object layer failed")
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globalObjLayerMutex.Lock()
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globalObjectAPI = newObject
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globalObjLayerMutex.Unlock()
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// Prints the formatted startup message once object layer is initialized.
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printStartupMessage(endPoints)
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// Waits on the server.
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<-globalServiceDoneCh
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}
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