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 InstanceSetID cloud.InstanceSetID
53 logger logrus.FieldLogger
54 reg *prometheus.Registry
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 disp.reg = prometheus.NewRegistry()
136 instanceSet, err := newInstanceSet(disp.Cluster, disp.InstanceSetID, disp.logger, disp.reg)
138 disp.logger.Fatalf("error initializing driver: %s", err)
140 disp.instanceSet = instanceSet
141 disp.pool = worker.NewPool(disp.logger, disp.ArvClient, disp.reg, disp.InstanceSetID, disp.instanceSet, disp.newExecutor, disp.sshKey.PublicKey(), disp.Cluster)
142 disp.queue = container.NewQueue(disp.logger, disp.reg, disp.typeChooser, disp.ArvClient)
144 if disp.Cluster.ManagementToken == "" {
145 disp.httpHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
146 http.Error(w, "Management API authentication is not configured", http.StatusForbidden)
149 mux := httprouter.New()
150 mux.HandlerFunc("GET", "/arvados/v1/dispatch/containers", disp.apiContainers)
151 mux.HandlerFunc("POST", "/arvados/v1/dispatch/containers/kill", disp.apiInstanceKill)
152 mux.HandlerFunc("GET", "/arvados/v1/dispatch/instances", disp.apiInstances)
153 mux.HandlerFunc("POST", "/arvados/v1/dispatch/instances/hold", disp.apiInstanceHold)
154 mux.HandlerFunc("POST", "/arvados/v1/dispatch/instances/drain", disp.apiInstanceDrain)
155 mux.HandlerFunc("POST", "/arvados/v1/dispatch/instances/run", disp.apiInstanceRun)
156 mux.HandlerFunc("POST", "/arvados/v1/dispatch/instances/kill", disp.apiInstanceKill)
157 metricsH := promhttp.HandlerFor(disp.reg, promhttp.HandlerOpts{
158 ErrorLog: disp.logger,
160 mux.Handler("GET", "/metrics", metricsH)
161 mux.Handler("GET", "/metrics.json", metricsH)
162 disp.httpHandler = auth.RequireLiteralToken(disp.Cluster.ManagementToken, mux)
166 func (disp *dispatcher) run() {
167 defer close(disp.stopped)
168 defer disp.instanceSet.Stop()
169 defer disp.pool.Stop()
171 staleLockTimeout := time.Duration(disp.Cluster.Containers.StaleLockTimeout)
172 if staleLockTimeout == 0 {
173 staleLockTimeout = defaultStaleLockTimeout
175 pollInterval := time.Duration(disp.Cluster.Containers.CloudVMs.PollInterval)
176 if pollInterval <= 0 {
177 pollInterval = defaultPollInterval
179 sched := scheduler.New(disp.Context, disp.queue, disp.pool, staleLockTimeout, pollInterval)
186 // Management API: all active and queued containers.
187 func (disp *dispatcher) apiContainers(w http.ResponseWriter, r *http.Request) {
189 Items []container.QueueEnt `json:"items"`
191 qEntries, _ := disp.queue.Entries()
192 for _, ent := range qEntries {
193 resp.Items = append(resp.Items, ent)
195 json.NewEncoder(w).Encode(resp)
198 // Management API: all active instances (cloud VMs).
199 func (disp *dispatcher) apiInstances(w http.ResponseWriter, r *http.Request) {
201 Items []worker.InstanceView `json:"items"`
203 resp.Items = disp.pool.Instances()
204 json.NewEncoder(w).Encode(resp)
207 // Management API: set idle behavior to "hold" for specified instance.
208 func (disp *dispatcher) apiInstanceHold(w http.ResponseWriter, r *http.Request) {
209 disp.apiInstanceIdleBehavior(w, r, worker.IdleBehaviorHold)
212 // Management API: set idle behavior to "drain" for specified instance.
213 func (disp *dispatcher) apiInstanceDrain(w http.ResponseWriter, r *http.Request) {
214 disp.apiInstanceIdleBehavior(w, r, worker.IdleBehaviorDrain)
217 // Management API: set idle behavior to "run" for specified instance.
218 func (disp *dispatcher) apiInstanceRun(w http.ResponseWriter, r *http.Request) {
219 disp.apiInstanceIdleBehavior(w, r, worker.IdleBehaviorRun)
222 // Management API: shutdown/destroy specified instance now.
223 func (disp *dispatcher) apiInstanceKill(w http.ResponseWriter, r *http.Request) {
224 id := cloud.InstanceID(r.FormValue("instance_id"))
226 httpserver.Error(w, "instance_id parameter not provided", http.StatusBadRequest)
229 err := disp.pool.KillInstance(id, "via management API: "+r.FormValue("reason"))
231 httpserver.Error(w, err.Error(), http.StatusNotFound)
236 // Management API: send SIGTERM to specified container's crunch-run
238 func (disp *dispatcher) apiContainerKill(w http.ResponseWriter, r *http.Request) {
239 uuid := r.FormValue("container_uuid")
241 httpserver.Error(w, "container_uuid parameter not provided", http.StatusBadRequest)
244 if !disp.pool.KillContainer(uuid, "via management API: "+r.FormValue("reason")) {
245 httpserver.Error(w, "container not found", http.StatusNotFound)
250 func (disp *dispatcher) apiInstanceIdleBehavior(w http.ResponseWriter, r *http.Request, want worker.IdleBehavior) {
251 id := cloud.InstanceID(r.FormValue("instance_id"))
253 httpserver.Error(w, "instance_id parameter not provided", http.StatusBadRequest)
256 err := disp.pool.SetIdleBehavior(id, want)
258 httpserver.Error(w, err.Error(), http.StatusNotFound)