16306: Merge branch 'master'
[arvados.git] / lib / boot / supervisor.go
index f2e715a76669ed7ea1db21a7720b3fbd382cb8a3..838808df58c267b1939dc2df443f8ba431f41d33 100644 (file)
@@ -14,12 +14,14 @@ import (
        "io"
        "io/ioutil"
        "net"
+       "net/url"
        "os"
        "os/exec"
        "os/signal"
        "os/user"
        "path/filepath"
        "reflect"
+       "strconv"
        "strings"
        "sync"
        "syscall"
@@ -54,7 +56,9 @@ type Supervisor struct {
        tasksReady    map[string]chan bool
        waitShutdown  sync.WaitGroup
 
+       bindir     string
        tempdir    string
+       wwwtempdir string
        configfile string
        environ    []string // for child processes
 }
@@ -131,13 +135,26 @@ func (super *Supervisor) run(cfg *arvados.Config) error {
                return err
        }
 
-       super.tempdir, err = ioutil.TempDir("", "arvados-server-boot-")
-       if err != nil {
-               return err
-       }
-       defer os.RemoveAll(super.tempdir)
-       if err := os.Mkdir(filepath.Join(super.tempdir, "bin"), 0755); err != nil {
-               return err
+       // Choose bin and temp dirs: /var/lib/arvados/... in
+       // production, transient tempdir otherwise.
+       if super.ClusterType == "production" {
+               // These dirs have already been created by
+               // "arvados-server install" (or by extracting a
+               // package).
+               super.tempdir = "/var/lib/arvados/tmp"
+               super.wwwtempdir = "/var/lib/arvados/wwwtmp"
+               super.bindir = "/var/lib/arvados/bin"
+       } else {
+               super.tempdir, err = ioutil.TempDir("", "arvados-server-boot-")
+               if err != nil {
+                       return err
+               }
+               defer os.RemoveAll(super.tempdir)
+               super.wwwtempdir = super.tempdir
+               super.bindir = filepath.Join(super.tempdir, "bin")
+               if err := os.Mkdir(super.bindir, 0755); err != nil {
+                       return err
+               }
        }
 
        // Fill in any missing config keys, and write the resulting
@@ -146,7 +163,7 @@ func (super *Supervisor) run(cfg *arvados.Config) error {
        if err != nil {
                return err
        }
-       conffile, err := os.OpenFile(filepath.Join(super.tempdir, "config.yml"), os.O_CREATE|os.O_WRONLY, 0644)
+       conffile, err := os.OpenFile(filepath.Join(super.wwwtempdir, "config.yml"), os.O_CREATE|os.O_WRONLY, 0644)
        if err != nil {
                return err
        }
@@ -166,7 +183,10 @@ func (super *Supervisor) run(cfg *arvados.Config) error {
        super.setEnv("ARVADOS_CONFIG", super.configfile)
        super.setEnv("RAILS_ENV", super.ClusterType)
        super.setEnv("TMPDIR", super.tempdir)
-       super.prependEnv("PATH", super.tempdir+"/bin:/var/lib/arvados/bin:")
+       super.prependEnv("PATH", "/var/lib/arvados/bin:")
+       if super.ClusterType != "production" {
+               super.prependEnv("PATH", super.tempdir+"/bin:")
+       }
 
        super.cluster, err = cfg.GetCluster("")
        if err != nil {
@@ -182,16 +202,18 @@ func (super *Supervisor) run(cfg *arvados.Config) error {
                "PID": os.Getpid(),
        })
 
-       if super.SourceVersion == "" {
+       if super.SourceVersion == "" && super.ClusterType == "production" {
+               // don't need SourceVersion
+       } else if super.SourceVersion == "" {
                // Find current source tree version.
                var buf bytes.Buffer
-               err = super.RunProgram(super.ctx, ".", &buf, nil, "git", "diff", "--shortstat")
+               err = super.RunProgram(super.ctx, ".", runOptions{output: &buf}, "git", "diff", "--shortstat")
                if err != nil {
                        return err
                }
                dirty := buf.Len() > 0
                buf.Reset()
-               err = super.RunProgram(super.ctx, ".", &buf, nil, "git", "log", "-n1", "--format=%H")
+               err = super.RunProgram(super.ctx, ".", runOptions{output: &buf}, "git", "log", "-n1", "--format=%H")
                if err != nil {
                        return err
                }
@@ -224,15 +246,15 @@ func (super *Supervisor) run(cfg *arvados.Config) error {
                runGoProgram{src: "services/keep-web", svc: super.cluster.Services.WebDAV},
                runServiceCommand{name: "ws", svc: super.cluster.Services.Websocket, depends: []supervisedTask{seedDatabase{}}},
                installPassenger{src: "services/api"},
-               runPassenger{src: "services/api", svc: super.cluster.Services.RailsAPI, depends: []supervisedTask{createCertificates{}, seedDatabase{}, installPassenger{src: "services/api"}}},
+               runPassenger{src: "services/api", varlibdir: "railsapi", svc: super.cluster.Services.RailsAPI, depends: []supervisedTask{createCertificates{}, seedDatabase{}, installPassenger{src: "services/api"}}},
                installPassenger{src: "apps/workbench", depends: []supervisedTask{seedDatabase{}}}, // dependency ensures workbench doesn't delay api install/startup
-               runPassenger{src: "apps/workbench", svc: super.cluster.Services.Workbench1, depends: []supervisedTask{installPassenger{src: "apps/workbench"}}},
+               runPassenger{src: "apps/workbench", varlibdir: "workbench1", svc: super.cluster.Services.Workbench1, depends: []supervisedTask{installPassenger{src: "apps/workbench"}}},
                seedDatabase{},
        }
        if super.ClusterType != "test" {
                tasks = append(tasks,
-                       runServiceCommand{name: "dispatch-cloud", svc: super.cluster.Services.Controller},
-                       runGoProgram{src: "services/keep-balance"},
+                       runServiceCommand{name: "dispatch-cloud", svc: super.cluster.Services.DispatchCloud},
+                       runGoProgram{src: "services/keep-balance", svc: super.cluster.Services.Keepbalance},
                )
        }
        super.tasksReady = map[string]chan bool{}
@@ -382,9 +404,11 @@ func dedupEnv(in []string) []string {
 
 func (super *Supervisor) installGoProgram(ctx context.Context, srcpath string) (string, error) {
        _, basename := filepath.Split(srcpath)
-       bindir := filepath.Join(super.tempdir, "bin")
-       binfile := filepath.Join(bindir, basename)
-       err := super.RunProgram(ctx, filepath.Join(super.SourcePath, srcpath), nil, []string{"GOBIN=" + bindir}, "go", "install", "-ldflags", "-X git.arvados.org/arvados.git/lib/cmd.version="+super.SourceVersion+" -X main.version="+super.SourceVersion)
+       binfile := filepath.Join(super.bindir, basename)
+       if super.ClusterType == "production" {
+               return binfile, nil
+       }
+       err := super.RunProgram(ctx, filepath.Join(super.SourcePath, srcpath), runOptions{env: []string{"GOBIN=" + super.bindir}}, "go", "install", "-ldflags", "-X git.arvados.org/arvados.git/lib/cmd.version="+super.SourceVersion+" -X main.version="+super.SourceVersion)
        return binfile, err
 }
 
@@ -401,10 +425,19 @@ func (super *Supervisor) setupRubyEnv() error {
                        "GEM_PATH=",
                })
                gem := "gem"
-               if _, err := os.Stat("/var/lib/arvados/bin/gem"); err == nil {
+               if _, err := os.Stat("/var/lib/arvados/bin/gem"); err == nil || super.ClusterType == "production" {
                        gem = "/var/lib/arvados/bin/gem"
                }
                cmd := exec.Command(gem, "env", "gempath")
+               if super.ClusterType == "production" {
+                       cmd.Args = append([]string{"sudo", "-u", "www-data", "-E", "HOME=/var/www"}, cmd.Args...)
+                       path, err := exec.LookPath("sudo")
+                       if err != nil {
+                               return fmt.Errorf("LookPath(\"sudo\"): %w", err)
+                       }
+                       cmd.Path = path
+               }
+               cmd.Stderr = super.Stderr
                cmd.Env = super.environ
                buf, err := cmd.Output() // /var/lib/arvados/.gem/ruby/2.5.0/bin:...
                if err != nil || len(buf) == 0 {
@@ -438,6 +471,12 @@ func (super *Supervisor) lookPath(prog string) string {
        return prog
 }
 
+type runOptions struct {
+       output io.Writer // attach stdout
+       env    []string  // add/replace environment variables
+       user   string    // run as specified user
+}
+
 // RunProgram runs prog with args, using dir as working directory. If ctx is
 // cancelled while the child is running, RunProgram terminates the child, waits
 // for it to exit, then returns.
@@ -446,22 +485,36 @@ func (super *Supervisor) lookPath(prog string) string {
 //
 // Child's stdout will be written to output if non-nil, otherwise the
 // boot command's stderr.
-func (super *Supervisor) RunProgram(ctx context.Context, dir string, output io.Writer, env []string, prog string, args ...string) error {
+func (super *Supervisor) RunProgram(ctx context.Context, dir string, opts runOptions, prog string, args ...string) error {
        cmdline := fmt.Sprintf("%s", append([]string{prog}, args...))
        super.logger.WithField("command", cmdline).WithField("dir", dir).Info("executing")
 
        logprefix := prog
-       if logprefix == "setuidgid" && len(args) >= 2 {
-               logprefix = args[1]
-       }
-       logprefix = strings.TrimPrefix(logprefix, super.tempdir+"/bin/")
-       if logprefix == "bundle" && len(args) > 2 && args[0] == "exec" {
-               logprefix = args[1]
-       } else if logprefix == "arvados-server" && len(args) > 1 {
-               logprefix = args[0]
-       }
-       if !strings.HasPrefix(dir, "/") {
-               logprefix = dir + ": " + logprefix
+       {
+               innerargs := args
+               if logprefix == "sudo" {
+                       for i := 0; i < len(args); i++ {
+                               if args[i] == "-u" {
+                                       i++
+                               } else if args[i] == "-E" || strings.Contains(args[i], "=") {
+                               } else {
+                                       logprefix = args[i]
+                                       innerargs = args[i+1:]
+                                       break
+                               }
+                       }
+               }
+               logprefix = strings.TrimPrefix(logprefix, "/var/lib/arvados/bin/")
+               logprefix = strings.TrimPrefix(logprefix, super.tempdir+"/bin/")
+               if logprefix == "bundle" && len(innerargs) > 2 && innerargs[0] == "exec" {
+                       _, dirbase := filepath.Split(dir)
+                       logprefix = innerargs[1] + "@" + dirbase
+               } else if logprefix == "arvados-server" && len(args) > 1 {
+                       logprefix = args[0]
+               }
+               if !strings.HasPrefix(dir, "/") {
+                       logprefix = dir + ": " + logprefix
+               }
        }
 
        cmd := exec.Command(super.lookPath(prog), args...)
@@ -482,10 +535,10 @@ func (super *Supervisor) RunProgram(ctx context.Context, dir string, output io.W
        }()
        copiers.Add(1)
        go func() {
-               if output == nil {
+               if opts.output == nil {
                        io.Copy(logwriter, stdout)
                } else {
-                       io.Copy(output, stdout)
+                       io.Copy(opts.output, stdout)
                }
                copiers.Done()
        }()
@@ -495,10 +548,34 @@ func (super *Supervisor) RunProgram(ctx context.Context, dir string, output io.W
        } else {
                cmd.Dir = filepath.Join(super.SourcePath, dir)
        }
-       env = append([]string(nil), env...)
+       env := append([]string(nil), opts.env...)
        env = append(env, super.environ...)
        cmd.Env = dedupEnv(env)
 
+       if opts.user != "" {
+               // Note: We use this approach instead of "sudo"
+               // because in certain circumstances (we are pid 1 in a
+               // docker container, and our passenger child process
+               // changes to pgid 1) the intermediate sudo process
+               // notices we have the same pgid as our child and
+               // refuses to propagate signals from us to our child,
+               // so we can't signal/shutdown our passenger/rails
+               // apps. "chpst" or "setuidgid" would work, but these
+               // few lines avoid depending on runit/daemontools.
+               u, err := user.Lookup(opts.user)
+               if err != nil {
+                       return fmt.Errorf("user.Lookup(%q): %w", opts.user, err)
+               }
+               uid, _ := strconv.Atoi(u.Uid)
+               gid, _ := strconv.Atoi(u.Gid)
+               cmd.SysProcAttr = &syscall.SysProcAttr{
+                       Credential: &syscall.Credential{
+                               Uid: uint32(uid),
+                               Gid: uint32(gid),
+                       },
+               }
+       }
+
        exited := false
        defer func() { exited = true }()
        go func() {
@@ -605,27 +682,26 @@ func (super *Supervisor) autofillConfig(cfg *arvados.Config) error {
                        }
                }
        }
-       if cluster.SystemRootToken == "" {
-               cluster.SystemRootToken = randomHexString(64)
-       }
-       if cluster.ManagementToken == "" {
-               cluster.ManagementToken = randomHexString(64)
-       }
-       if cluster.Collections.BlobSigningKey == "" {
-               cluster.Collections.BlobSigningKey = randomHexString(64)
-       }
-       if cluster.Users.AnonymousUserToken == "" {
-               cluster.Users.AnonymousUserToken = randomHexString(64)
-       }
-
-       if super.ClusterType != "production" && cluster.Containers.DispatchPrivateKey == "" {
-               buf, err := ioutil.ReadFile(filepath.Join(super.SourcePath, "lib", "dispatchcloud", "test", "sshkey_dispatch"))
-               if err != nil {
-                       return err
-               }
-               cluster.Containers.DispatchPrivateKey = string(buf)
-       }
        if super.ClusterType != "production" {
+               if cluster.SystemRootToken == "" {
+                       cluster.SystemRootToken = randomHexString(64)
+               }
+               if cluster.ManagementToken == "" {
+                       cluster.ManagementToken = randomHexString(64)
+               }
+               if cluster.Collections.BlobSigningKey == "" {
+                       cluster.Collections.BlobSigningKey = randomHexString(64)
+               }
+               if cluster.Users.AnonymousUserToken == "" {
+                       cluster.Users.AnonymousUserToken = randomHexString(64)
+               }
+               if cluster.Containers.DispatchPrivateKey == "" {
+                       buf, err := ioutil.ReadFile(filepath.Join(super.SourcePath, "lib", "dispatchcloud", "test", "sshkey_dispatch"))
+                       if err != nil {
+                               return err
+                       }
+                       cluster.Containers.DispatchPrivateKey = string(buf)
+               }
                cluster.TLS.Insecure = true
        }
        if super.ClusterType == "test" {
@@ -695,11 +771,10 @@ func internalPort(svc arvados.Service) (string, error) {
                return "", errors.New("internalPort() doesn't work with multiple InternalURLs")
        }
        for u := range svc.InternalURLs {
-               if _, p, err := net.SplitHostPort(u.Host); err != nil {
-                       return "", err
-               } else if p != "" {
+               u := url.URL(u)
+               if p := u.Port(); p != "" {
                        return p, nil
-               } else if u.Scheme == "https" {
+               } else if u.Scheme == "https" || u.Scheme == "ws" {
                        return "443", nil
                } else {
                        return "80", nil
@@ -709,11 +784,10 @@ func internalPort(svc arvados.Service) (string, error) {
 }
 
 func externalPort(svc arvados.Service) (string, error) {
-       if _, p, err := net.SplitHostPort(svc.ExternalURL.Host); err != nil {
-               return "", err
-       } else if p != "" {
+       u := url.URL(svc.ExternalURL)
+       if p := u.Port(); p != "" {
                return p, nil
-       } else if svc.ExternalURL.Scheme == "https" {
+       } else if u.Scheme == "https" || u.Scheme == "wss" {
                return "443", nil
        } else {
                return "80", nil