1 // Copyright (C) The Arvados Authors. All rights reserved.
3 // SPDX-License-Identifier: AGPL-3.0
17 "git.curoverse.com/arvados.git/lib/cloud"
18 "git.curoverse.com/arvados.git/lib/dispatchcloud/container"
19 "git.curoverse.com/arvados.git/lib/dispatchcloud/scheduler"
20 "git.curoverse.com/arvados.git/lib/dispatchcloud/ssh_executor"
21 "git.curoverse.com/arvados.git/lib/dispatchcloud/worker"
22 "git.curoverse.com/arvados.git/sdk/go/arvados"
23 "git.curoverse.com/arvados.git/sdk/go/auth"
24 "git.curoverse.com/arvados.git/sdk/go/ctxlog"
25 "git.curoverse.com/arvados.git/sdk/go/httpserver"
26 "github.com/julienschmidt/httprouter"
27 "github.com/prometheus/client_golang/prometheus"
28 "github.com/prometheus/client_golang/prometheus/promhttp"
29 "github.com/sirupsen/logrus"
30 "golang.org/x/crypto/ssh"
34 defaultPollInterval = time.Second
35 defaultStaleLockTimeout = time.Minute
40 Instances() []worker.InstanceView
41 SetIdleBehavior(cloud.InstanceID, worker.IdleBehavior) error
42 KillInstance(id cloud.InstanceID, reason string) error
46 type dispatcher struct {
47 Cluster *arvados.Cluster
48 Context context.Context
49 ArvClient *arvados.Client
51 Registry *prometheus.Registry
52 InstanceSetID cloud.InstanceSetID
54 logger logrus.FieldLogger
55 instanceSet cloud.InstanceSet
57 queue scheduler.ContainerQueue
58 httpHandler http.Handler
66 // Start starts the dispatcher. Start can be called multiple times
67 // with no ill effect.
68 func (disp *dispatcher) Start() {
69 disp.setupOnce.Do(disp.setup)
72 // ServeHTTP implements service.Handler.
73 func (disp *dispatcher) ServeHTTP(w http.ResponseWriter, r *http.Request) {
75 disp.httpHandler.ServeHTTP(w, r)
78 // CheckHealth implements service.Handler.
79 func (disp *dispatcher) CheckHealth() error {
84 // Stop dispatching containers and release resources. Typically used
86 func (disp *dispatcher) Close() {
89 case disp.stop <- struct{}{}:
95 // Make a worker.Executor for the given instance.
96 func (disp *dispatcher) newExecutor(inst cloud.Instance) worker.Executor {
97 exr := ssh_executor.New(inst)
98 exr.SetTargetPort(disp.Cluster.Containers.CloudVMs.SSHPort)
99 exr.SetSigners(disp.sshKey)
103 func (disp *dispatcher) typeChooser(ctr *arvados.Container) (arvados.InstanceType, error) {
104 return ChooseInstanceType(disp.Cluster, ctr)
107 func (disp *dispatcher) setup() {
112 func (disp *dispatcher) initialize() {
113 disp.logger = ctxlog.FromContext(disp.Context)
115 disp.ArvClient.AuthToken = disp.AuthToken
117 if disp.InstanceSetID == "" {
118 if strings.HasPrefix(disp.AuthToken, "v2/") {
119 disp.InstanceSetID = cloud.InstanceSetID(strings.Split(disp.AuthToken, "/")[1])
121 // Use some other string unique to this token
122 // that doesn't reveal the token itself.
123 disp.InstanceSetID = cloud.InstanceSetID(fmt.Sprintf("%x", md5.Sum([]byte(disp.AuthToken))))
126 disp.stop = make(chan struct{}, 1)
127 disp.stopped = make(chan struct{})
129 if key, err := ssh.ParsePrivateKey([]byte(disp.Cluster.Containers.DispatchPrivateKey)); err != nil {
130 disp.logger.Fatalf("error parsing configured Containers.DispatchPrivateKey: %s", err)
135 instanceSet, err := newInstanceSet(disp.Cluster, disp.InstanceSetID, disp.logger, disp.Registry)
137 disp.logger.Fatalf("error initializing driver: %s", err)
139 disp.instanceSet = instanceSet
140 disp.pool = worker.NewPool(disp.logger, disp.ArvClient, disp.Registry, disp.InstanceSetID, disp.instanceSet, disp.newExecutor, disp.sshKey.PublicKey(), disp.Cluster)
141 disp.queue = container.NewQueue(disp.logger, disp.Registry, disp.typeChooser, disp.ArvClient)
143 if disp.Cluster.ManagementToken == "" {
144 disp.httpHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
145 http.Error(w, "Management API authentication is not configured", http.StatusForbidden)
148 mux := httprouter.New()
149 mux.HandlerFunc("GET", "/arvados/v1/dispatch/containers", disp.apiContainers)
150 mux.HandlerFunc("POST", "/arvados/v1/dispatch/containers/kill", disp.apiInstanceKill)
151 mux.HandlerFunc("GET", "/arvados/v1/dispatch/instances", disp.apiInstances)
152 mux.HandlerFunc("POST", "/arvados/v1/dispatch/instances/hold", disp.apiInstanceHold)
153 mux.HandlerFunc("POST", "/arvados/v1/dispatch/instances/drain", disp.apiInstanceDrain)
154 mux.HandlerFunc("POST", "/arvados/v1/dispatch/instances/run", disp.apiInstanceRun)
155 mux.HandlerFunc("POST", "/arvados/v1/dispatch/instances/kill", disp.apiInstanceKill)
156 metricsH := promhttp.HandlerFor(disp.Registry, promhttp.HandlerOpts{
157 ErrorLog: disp.logger,
159 mux.Handler("GET", "/metrics", metricsH)
160 mux.Handler("GET", "/metrics.json", metricsH)
161 disp.httpHandler = auth.RequireLiteralToken(disp.Cluster.ManagementToken, mux)
165 func (disp *dispatcher) run() {
166 defer close(disp.stopped)
167 defer disp.instanceSet.Stop()
168 defer disp.pool.Stop()
170 staleLockTimeout := time.Duration(disp.Cluster.Containers.StaleLockTimeout)
171 if staleLockTimeout == 0 {
172 staleLockTimeout = defaultStaleLockTimeout
174 pollInterval := time.Duration(disp.Cluster.Containers.CloudVMs.PollInterval)
175 if pollInterval <= 0 {
176 pollInterval = defaultPollInterval
178 sched := scheduler.New(disp.Context, disp.queue, disp.pool, staleLockTimeout, pollInterval)
185 // Management API: all active and queued containers.
186 func (disp *dispatcher) apiContainers(w http.ResponseWriter, r *http.Request) {
188 Items []container.QueueEnt `json:"items"`
190 qEntries, _ := disp.queue.Entries()
191 for _, ent := range qEntries {
192 resp.Items = append(resp.Items, ent)
194 json.NewEncoder(w).Encode(resp)
197 // Management API: all active instances (cloud VMs).
198 func (disp *dispatcher) apiInstances(w http.ResponseWriter, r *http.Request) {
200 Items []worker.InstanceView `json:"items"`
202 resp.Items = disp.pool.Instances()
203 json.NewEncoder(w).Encode(resp)
206 // Management API: set idle behavior to "hold" for specified instance.
207 func (disp *dispatcher) apiInstanceHold(w http.ResponseWriter, r *http.Request) {
208 disp.apiInstanceIdleBehavior(w, r, worker.IdleBehaviorHold)
211 // Management API: set idle behavior to "drain" for specified instance.
212 func (disp *dispatcher) apiInstanceDrain(w http.ResponseWriter, r *http.Request) {
213 disp.apiInstanceIdleBehavior(w, r, worker.IdleBehaviorDrain)
216 // Management API: set idle behavior to "run" for specified instance.
217 func (disp *dispatcher) apiInstanceRun(w http.ResponseWriter, r *http.Request) {
218 disp.apiInstanceIdleBehavior(w, r, worker.IdleBehaviorRun)
221 // Management API: shutdown/destroy specified instance now.
222 func (disp *dispatcher) apiInstanceKill(w http.ResponseWriter, r *http.Request) {
223 id := cloud.InstanceID(r.FormValue("instance_id"))
225 httpserver.Error(w, "instance_id parameter not provided", http.StatusBadRequest)
228 err := disp.pool.KillInstance(id, "via management API: "+r.FormValue("reason"))
230 httpserver.Error(w, err.Error(), http.StatusNotFound)
235 // Management API: send SIGTERM to specified container's crunch-run
237 func (disp *dispatcher) apiContainerKill(w http.ResponseWriter, r *http.Request) {
238 uuid := r.FormValue("container_uuid")
240 httpserver.Error(w, "container_uuid parameter not provided", http.StatusBadRequest)
243 if !disp.pool.KillContainer(uuid, "via management API: "+r.FormValue("reason")) {
244 httpserver.Error(w, "container not found", http.StatusNotFound)
249 func (disp *dispatcher) apiInstanceIdleBehavior(w http.ResponseWriter, r *http.Request, want worker.IdleBehavior) {
250 id := cloud.InstanceID(r.FormValue("instance_id"))
252 httpserver.Error(w, "instance_id parameter not provided", http.StatusBadRequest)
255 err := disp.pool.SetIdleBehavior(id, want)
257 httpserver.Error(w, err.Error(), http.StatusNotFound)