1592525883

Committed 17 Dec 2024 01:50PM UTC coverage: 73.526% (+0.7%) from 72.839%

Build # 1592525883

Build Type

Pull #270

gitlab-ci

Committed by

bahaa-ghazal

Commit Message

test: testing 'deploy to all devices' feature

Changelog = Title
Ticket = MEN-4272
Signed-off-by: Bahaa Aldeen Ghazal <bahaa.ghazal@northern.tech>

Pull Request Pull Request #270: test: testing 'deploy to all devices' feature

Run Details

4244 of 6144 branches covered (69.08%)

Branch coverage included in aggregate %.

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70.8

/backend/services/workflows/app/worker/worker_group.go

// Copyright 2024 Northern.tech AS
//
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//
//        http://www.apache.org/licenses/LICENSE-2.0
//
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.

package worker

import (
        "context"
        "encoding/json"
        "sync"
        "sync/atomic"
        "time"

        natsio "github.com/nats-io/nats.go"
        "github.com/pkg/errors"

        "github.com/mendersoftware/mender-server/pkg/log"

        "github.com/mendersoftware/mender-server/services/workflows/client/nats"
        "github.com/mendersoftware/mender-server/services/workflows/model"
        "github.com/mendersoftware/mender-server/services/workflows/store"
)

type workerGroup struct {
        mu        sync.Mutex    // Mutex to protect the shared firstDone channel
        firstDone chan struct{} // First worker finished
        done      chan struct{} // All workers finished
        termID    int32         // ID of the first worker to finish

        workerCount int32

        input        <-chan *natsio.Msg
        notifyPeriod time.Duration

        client nats.Client
        store  store.DataStore
}

func NewWorkGroup(
        input <-chan *natsio.Msg,
        notifyPeriod time.Duration,
        nc nats.Client,
        ds store.DataStore,
) *workerGroup {
        return &workerGroup{
                done:      make(chan struct{}),
                firstDone: make(chan struct{}),

                input:        input,
                notifyPeriod: notifyPeriod,
                client:       nc,
                store:        ds,
        }
}

// Done returns a channel (barrier) that is closed when the last worker
// has exited.
func (w *workerGroup) Done() <-chan struct{} {
        return w.done
}

// FirstDone returns a channel (barrier) that is closed when the first
// worker has exited.
func (w *workerGroup) FirstDone() <-chan struct{} {
        return w.firstDone
}

// TermID is the ID of the first worker that quit.
func (w *workerGroup) TermID() int32 {
        return w.termID
}

func (w *workerGroup) RunWorker(ctx context.Context) {
        id := atomic.AddInt32(&w.workerCount, 1)
        l := log.FromContext(ctx)
        l = l.F(log.Ctx{"worker_id": id})
        ctx = log.WithContext(ctx, l)

        sidecarChan := make(chan *natsio.Msg, 1)
        sidecarDone := make(chan struct{})
        defer func() {
                l.Info("worker shutting down")
                close(sidecarChan)

                w.mu.Lock()
                remaining := atomic.AddInt32(&w.workerCount, -1)
                // Is this the last worker to quit?
                if remaining <= 0 {
                        select {
                        case <-w.done:

                        default:
                                close(w.done)
                        }
                } else {
                        // Is this the first worker to quit?
                        select {
                        case <-w.firstDone:

                        default:
                                w.termID = id
                                close(w.firstDone)
                        }
                }
                w.mu.Unlock()
        }()
        l.Info("worker starting up")
        // workerSidecar is responsible for notifying the broker about slow workflows
        go w.workerSidecar(ctx, sidecarChan, sidecarDone)
        w.workerMain(ctx, sidecarChan, sidecarDone)
}

func (w *workerGroup) workerMain(
        ctx context.Context,
        sidecarChan chan *natsio.Msg,
        sidecarDone chan struct{},
) {
        l := log.FromContext(ctx)
        ctxDone := ctx.Done()
        timeoutTimer := newStoppedTimer()
        for {
                var (
                        msg    *natsio.Msg
                        isOpen bool
                )
                select {
                case msg, isOpen = <-w.input:
                        if !isOpen {
                                return
                        }

                case <-sidecarDone:
                        return
                case <-ctxDone:
                        return
                }

                // Notify the sidecar routine about the new message
                select {
                case sidecarChan <- msg:

                case <-timeoutTimer.After(w.notifyPeriod / 8):
                        l.Warn("timeout notifying sidecar routine about message")

                case <-sidecarDone:
                        return
                case <-ctxDone:
                        return
                }

                job := &model.Job{}
                err := json.Unmarshal(msg.Data, job)
                if err != nil {
                        l.Error(errors.Wrap(err, "failed to unmarshall message"))
                        if err := msg.Term(); err != nil {
                                l.Error(errors.Wrap(err, "failed to term the message"))
                        }
                        continue
                }
                // process the job
                l.Infof("processing job %s workflow %s", job.ID, job.WorkflowName)
                err = processJob(ctx, job, w.store, w.client)
                if err != nil {
                        l.Errorf("error processing job: %s", err.Error())
                } else {
                        l.Infof("finished job %s workflow %s", job.ID, job.WorkflowName)
                }
                // stop the in progress ticker and ack the message
                select {
                case sidecarChan <- nil:

                case <-timeoutTimer.After(w.notifyPeriod):
                        l.Errorf("timeout notifying sidecar about job completion")

                case <-ctxDone:
                        return
                case <-sidecarDone:
                        return
                }
                // Release message
                if err := msg.AckSync(); err != nil {
                        l.Error(errors.Wrap(err, "failed to ack the message"))
                }
        }
}

// workerSidecar helps notifying the NATS server about slow workflows.
// When workerMain picks up a new task, this routine is woken up and starts
// a timer that sends an "IN PROGRESS" package back to the broker if the worker
// takes too long.
func (w *workerGroup) workerSidecar(
        ctx context.Context,
        msgIn <-chan *natsio.Msg,
        done chan<- struct{},
) {
        var (
                isOpen        bool
                msgInProgress *natsio.Msg
                ctxDone       = ctx.Done()
                l             = log.FromContext(ctx)
        )
        defer close(done)

        t := newStoppedTimer()
        for {
                select {
                case <-t.C:
                        ctx, cancel := context.WithTimeout(ctx, w.notifyPeriod)
                        err := msgInProgress.InProgress(natsio.Context(ctx))
                        cancel()
                        if err != nil {
                                l.Errorf("error notifying broker about message in progress: %s", err)
                                // If the +WPI message fails, let's not try again, but
                                // wait for the next message.
                        } else {
                                t.Reset(w.notifyPeriod)
                        }
                case msgInProgress, isOpen = <-msgIn:
                        if !isOpen {
                                return
                        } else if msgInProgress == nil {
                                t.Stop()
                        } else {
                                t.Reset(w.notifyPeriod)
                        }
                case <-ctxDone:
                        return
                }
        }
}

1	// Copyright 2024 Northern.tech AS
2	//
3	// Licensed under the Apache License, Version 2.0 (the "License");
4	// you may not use this file except in compliance with the License.
5	// You may obtain a copy of the License at
6	//
7	// http://www.apache.org/licenses/LICENSE-2.0
8	//
9	// Unless required by applicable law or agreed to in writing, software
10	// distributed under the License is distributed on an "AS IS" BASIS,
11	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12	// See the License for the specific language governing permissions and
13	// limitations under the License.
14
15	package worker
16
17	import (
18	"context"
19	"encoding/json"
20	"sync"
21	"sync/atomic"
22	"time"
23
24	natsio "github.com/nats-io/nats.go"
25	"github.com/pkg/errors"
26
27	"github.com/mendersoftware/mender-server/pkg/log"
28
29	"github.com/mendersoftware/mender-server/services/workflows/client/nats"
30	"github.com/mendersoftware/mender-server/services/workflows/model"
31	"github.com/mendersoftware/mender-server/services/workflows/store"
32	)
33
34	type workerGroup struct {
35	mu sync.Mutex // Mutex to protect the shared firstDone channel
36	firstDone chan struct{} // First worker finished
37	done chan struct{} // All workers finished
38	termID int32 // ID of the first worker to finish
39
40	workerCount int32
41
42	input <-chan *natsio.Msg
43	notifyPeriod time.Duration
44
45	client nats.Client
46	store store.DataStore
47	}
48
49	func NewWorkGroup(
50	input <-chan *natsio.Msg,
51	notifyPeriod time.Duration,
52	nc nats.Client,
53	ds store.DataStore,
54	) *workerGroup {	2✔
55	return &workerGroup{	2✔
56	done: make(chan struct{}),	2✔
57	firstDone: make(chan struct{}),	2✔
58		2✔
59	input: input,	2✔
60	notifyPeriod: notifyPeriod,	2✔
61	client: nc,	2✔
62	store: ds,	2✔
63	}	2✔
64	}	2✔
65
66	// Done returns a channel (barrier) that is closed when the last worker
67	// has exited.
68	func (w *workerGroup) Done() <-chan struct{} {	2✔
69	return w.done	2✔
70	}	2✔
71
72	// FirstDone returns a channel (barrier) that is closed when the first
73	// worker has exited.
74	func (w *workerGroup) FirstDone() <-chan struct{} {	2✔
75	return w.firstDone	2✔
76	}	2✔
77
78	// TermID is the ID of the first worker that quit.
79	func (w *workerGroup) TermID() int32 {	×
80	return w.termID	×
81	}	×
82
83	func (w *workerGroup) RunWorker(ctx context.Context) {	2✔
84	id := atomic.AddInt32(&w.workerCount, 1)	2✔
85	l := log.FromContext(ctx)	2✔
86	l = l.F(log.Ctx{"worker_id": id})	2✔
87	ctx = log.WithContext(ctx, l)	2✔
88		2✔
89	sidecarChan := make(chan *natsio.Msg, 1)	2✔
90	sidecarDone := make(chan struct{})	2✔
91	defer func() {	4✔
92	l.Info("worker shutting down")	2✔
93	close(sidecarChan)	2✔
94		2✔
95	w.mu.Lock()	2✔
96	remaining := atomic.AddInt32(&w.workerCount, -1)	2✔
97	// Is this the last worker to quit?	2✔
98	if remaining <= 0 {	4✔
99	select {	2✔
100	case <-w.done:	×
101
102	default:	2✔
103	close(w.done)	2✔
104	}
105	} else {	2✔
106	// Is this the first worker to quit?	2✔
107	select {	2✔
108	case <-w.firstDone:	2✔
109
110	default:	2✔
111	w.termID = id	2✔
112	close(w.firstDone)	2✔
113	}
114	}
115	w.mu.Unlock()	2✔
116	}()
117	l.Info("worker starting up")	2✔
118	// workerSidecar is responsible for notifying the broker about slow workflows	2✔
119	go w.workerSidecar(ctx, sidecarChan, sidecarDone)	2✔
120	w.workerMain(ctx, sidecarChan, sidecarDone)	2✔
121	}
122
123	func (w *workerGroup) workerMain(
124	ctx context.Context,
125	sidecarChan chan *natsio.Msg,
126	sidecarDone chan struct{},
127	) {	2✔
128	l := log.FromContext(ctx)	2✔
129	ctxDone := ctx.Done()	2✔
130	timeoutTimer := newStoppedTimer()	2✔
131	for {	4✔
132	var (	2✔
133	msg *natsio.Msg	2✔
134	isOpen bool	2✔
135	)	2✔
136	select {	2✔
137	case msg, isOpen = <-w.input:	2✔
138	if !isOpen {	4✔
139	return	2✔
140	}	2✔
141
142	case <-sidecarDone:	×
143	return	×
144	case <-ctxDone:	×
145	return	×
146	}
147
148	// Notify the sidecar routine about the new message
149	select {	2✔
150	case sidecarChan <- msg:	2✔
151
152	case <-timeoutTimer.After(w.notifyPeriod / 8):	×
153	l.Warn("timeout notifying sidecar routine about message")	×
154
155	case <-sidecarDone:	×
156	return	×
157	case <-ctxDone:	×
158	return	×
159	}
160
161	job := &model.Job{}	2✔
162	err := json.Unmarshal(msg.Data, job)	2✔
163	if err != nil {	2✔
164	l.Error(errors.Wrap(err, "failed to unmarshall message"))	×
165	if err := msg.Term(); err != nil {	×
166	l.Error(errors.Wrap(err, "failed to term the message"))	×
167	}	×
168	continue	×
169	}
170	// process the job
171	l.Infof("processing job %s workflow %s", job.ID, job.WorkflowName)	2✔
172	err = processJob(ctx, job, w.store, w.client)	2✔
173	if err != nil {	4✔
174	l.Errorf("error processing job: %s", err.Error())	2✔
175	} else {	4✔
176	l.Infof("finished job %s workflow %s", job.ID, job.WorkflowName)	2✔
177	}	2✔
178	// stop the in progress ticker and ack the message
179	select {	2✔
180	case sidecarChan <- nil:	2✔
181
182	case <-timeoutTimer.After(w.notifyPeriod):	×
183	l.Errorf("timeout notifying sidecar about job completion")	×
184
185	case <-ctxDone:	×
186	return	×
187	case <-sidecarDone:	×
188	return	×
189	}
190	// Release message
191	if err := msg.AckSync(); err != nil {	2✔
192	l.Error(errors.Wrap(err, "failed to ack the message"))	×
193	}	×
194	}
195	}
196
197	// workerSidecar helps notifying the NATS server about slow workflows.
198	// When workerMain picks up a new task, this routine is woken up and starts
199	// a timer that sends an "IN PROGRESS" package back to the broker if the worker
200	// takes too long.
201	func (w *workerGroup) workerSidecar(
202	ctx context.Context,
203	msgIn <-chan *natsio.Msg,
204	done chan<- struct{},
205	) {	2✔
206	var (	2✔
207	isOpen bool	2✔
208	msgInProgress *natsio.Msg	2✔
209	ctxDone = ctx.Done()	2✔
210	l = log.FromContext(ctx)	2✔
211	)	2✔
212	defer close(done)	2✔
213		2✔
214	t := newStoppedTimer()	2✔
215	for {	4✔
216	select {	2✔
217	case <-t.C:	×
218	ctx, cancel := context.WithTimeout(ctx, w.notifyPeriod)	×
219	err := msgInProgress.InProgress(natsio.Context(ctx))	×
220	cancel()	×
221	if err != nil {	×
222	l.Errorf("error notifying broker about message in progress: %s", err)	×
223	// If the +WPI message fails, let's not try again, but	×
224	// wait for the next message.	×
225	} else {	×
226	t.Reset(w.notifyPeriod)	×
227	}	×
228	case msgInProgress, isOpen = <-msgIn:	2✔
229	if !isOpen {	4✔
230	return	2✔
231	} else if msgInProgress == nil {	6✔
232	t.Stop()	2✔
233	} else {	4✔
234	t.Reset(w.notifyPeriod)	2✔
235	}	2✔
236	case <-ctxDone:	×
237	return	×
238	}
239	}
240	}

mendersoftware / mender-server / 1592525883

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