summaryrefslogtreecommitdiff
path: root/cmd/lspipeline/main.go
blob: 0b8ce49470f37d2ae554dca47d636535e76c8a5b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
package main

import (
	"errors"
	"flag"
	"fmt"
	"log"
	"os/exec"
	"sort"
	"strings"

	"rescribe.xyz/bookpipeline"
)

const usage = `Usage: lspipeline [-i key] [-n num]

Lists useful things related to the pipeline.

- Instances running
- Messages in each queue
- Books not completed
- Books done
- Last n lines of bookpipeline logs from each running instance
`

type LsPipeliner interface {
	Init() error
	PreQueueId() string
	WipeQueueId() string
	OCRQueueId() string
	AnalyseQueueId() string
	GetQueueDetails(url string) (string, string, error)
	GetInstanceDetails() ([]bookpipeline.InstanceDetails, error)
	ListObjectsWithMeta(bucket string, prefix string) ([]bookpipeline.ObjMeta, error)
	WIPStorageId() string
}

// NullWriter is used so non-verbose logging may be discarded
type NullWriter bool

func (w NullWriter) Write(p []byte) (n int, err error) {
	return len(p), nil
}

type queueDetails struct {
	name, numAvailable, numInProgress string
}

func getInstances(conn LsPipeliner, detailsc chan bookpipeline.InstanceDetails) {
	details, err := conn.GetInstanceDetails()
	if err != nil {
		log.Println("Error getting instance details:", err)
	}
	for _, d := range details {
		detailsc <- d
	}
	close(detailsc)
}

func getQueueDetails(conn LsPipeliner, qdetails chan queueDetails) {
	queues := []struct{ name, id string }{
		{"preprocess", conn.PreQueueId()},
		{"wipeonly", conn.WipeQueueId()},
		{"ocr", conn.OCRQueueId()},
		{"analyse", conn.AnalyseQueueId()},
	}
	for _, q := range queues {
		avail, inprog, err := conn.GetQueueDetails(q.id)
		if err != nil {
			log.Println("Error getting queue details:", err)
		}
		var qd queueDetails
		qd.name = q.name
		qd.numAvailable = avail
		qd.numInProgress = inprog
		qdetails <- qd
	}
	close(qdetails)
}

type ObjMetas []bookpipeline.ObjMeta

// used by sort.Sort
func (o ObjMetas) Len() int {
	return len(o)
}

// used by sort.Sort
func (o ObjMetas) Swap(i, j int) {
	o[i], o[j] = o[j], o[i]
}

// used by sort.Sort
func (o ObjMetas) Less(i, j int) bool {
	return o[i].Date.Before(o[j].Date)
}

// sortBookList sorts a list of book names by date.
// It uses a list of filenames and dates in an ObjMeta slice to
// determine the date for a book name.
func sortBookList(list []string, fileinfo []bookpipeline.ObjMeta) ([]string, error) {
	var listinfo ObjMetas

	for _, name := range list {
		found := false
		for _, f := range fileinfo {
			parts := strings.Split(f.Name, "/")
			prefix := parts[0]
			if name == prefix {
				listinfo = append(listinfo, bookpipeline.ObjMeta{Name: name, Date: f.Date})
				found = true
				break
			}
		}
		if !found {
			return list, errors.New("Failed to find metadata for list")
		}
	}

	// sort listinfo by date
	sort.Sort(listinfo)

	var l []string
	for _, i := range listinfo {
		l = append(l, i.Name)
	}
	return l, nil
}

// getBookStatus returns a list of in progress and done books.
// It determines this by listing all objects, and splitting the
// prefixes into two lists, those which have a 'graph.png' file,
// which are classed as done, and those which are not. These are
// sorted by date according to file metadata.
func getBookStatus(conn LsPipeliner) (inprogress []string, done []string, err error) {
	allfiles, err := conn.ListObjectsWithMeta(conn.WIPStorageId(), "")
	if err != nil {
		log.Println("Error getting list of objects:", err)
		return inprogress, done, err
	}
	for _, f := range allfiles {
		parts := strings.Split(f.Name, "/")
		if parts[1] != "graph.png" {
			continue
		}
		prefix := parts[0]
		found := false
		for _, i := range done {
			if i == prefix {
				found = true
				continue
			}
		}
		if !found {
			done = append(done, prefix)
		}
	}

	for _, f := range allfiles {
		parts := strings.Split(f.Name, "/")
		prefix := parts[0]
		found := false
		for _, i := range done {
			if i == prefix {
				found = true
				continue
			}
		}
		for _, i := range inprogress {
			if i == prefix {
				found = true
				continue
			}
		}
		if !found {
			inprogress = append(inprogress, prefix)
		}
	}

	inprogress, err = sortBookList(inprogress, allfiles)
	if err != nil {
		log.Println("Error sorting list of objects:", err)
		err = nil
	}
	done, err = sortBookList(done, allfiles)
	if err != nil {
		log.Println("Error sorting list of objects:", err)
		err = nil
	}

	return inprogress, done, err
}

func getBookStatusChan(conn LsPipeliner, inprogressc chan string, donec chan string) {
	inprogress, done, err := getBookStatus(conn)
	if err != nil {
		log.Println("Error getting book status:", err)
		close(inprogressc)
		close(donec)
		return
	}
	for _, i := range inprogress {
		inprogressc <- i
	}
	close(inprogressc)
	for _, i := range done {
		donec <- i
	}
	close(donec)
}

func getRecentSSHLogs(ip string, id string, n int) (string, error) {
	addr := fmt.Sprintf("%s@%s", "admin", ip)
	logcmd := fmt.Sprintf("journalctl -n %d -u bookpipeline", n)
	var cmd *exec.Cmd
	if id == "" {
		cmd = exec.Command("ssh", "-o", "StrictHostKeyChecking no", addr, logcmd)
	} else {
		cmd = exec.Command("ssh", "-o", "StrictHostKeyChecking no", "-i", id, addr, logcmd)
	}
	out, err := cmd.Output()
	if err != nil {
		return "", err
	}
	return string(out), nil
}

func getRecentSSHLogsChan(ips []string, id string, lognum int, logs chan string) {
	for _, ip := range ips {
		sshlog, err := getRecentSSHLogs(ip, id, lognum)
		if err != nil {
			log.Printf("Error getting SSH logs for %s: %s\n", ip, err)
			continue
		}
		logs <- fmt.Sprintf("%s\n%s", ip, sshlog)
	}
	close(logs)
}

func main() {
	keyfile := flag.String("i", "", "private key file for SSH")
	lognum := flag.Int("n", 5, "number of lines to include in SSH logs")
	flag.Usage = func() {
		fmt.Fprintf(flag.CommandLine.Output(), usage)
		flag.PrintDefaults()
	}
	flag.Parse()

	var verboselog *log.Logger
	var n NullWriter
	verboselog = log.New(n, "", 0)

	var conn LsPipeliner
	conn = &bookpipeline.AwsConn{Region: "eu-west-2", Logger: verboselog}
	err := conn.Init()
	if err != nil {
		log.Fatalln("Failed to set up cloud connection:", err)
	}

	instances := make(chan bookpipeline.InstanceDetails, 100)
	queues := make(chan queueDetails)
	inprogress := make(chan string, 100)
	done := make(chan string, 100)
	logs := make(chan string, 10)

	go getInstances(conn, instances)
	go getQueueDetails(conn, queues)
	go getBookStatusChan(conn, inprogress, done)

	var ips []string

	fmt.Println("# Instances")
	for i := range instances {
		fmt.Printf("ID: %s, Type: %s, LaunchTime: %s, State: %s", i.Id, i.Type, i.LaunchTime, i.State)
		if i.Name != "" {
			fmt.Printf(", Name: %s", i.Name)
		}
		if i.Ip != "" {
			fmt.Printf(", IP: %s", i.Ip)
			if i.State == "running" && i.Name != "workhorse" {
				ips = append(ips, i.Ip)
			}
		}
		if i.Spot != "" {
			fmt.Printf(", SpotRequest: %s", i.Spot)
		}
		fmt.Printf("\n")
	}

	go getRecentSSHLogsChan(ips, *keyfile, *lognum, logs)

	fmt.Println("\n# Queues")
	for i := range queues {
		fmt.Printf("%s: %s available, %s in progress\n", i.name, i.numAvailable, i.numInProgress)
	}

	fmt.Println("\n# Books not completed")
	for i := range inprogress {
		fmt.Println(i)
	}

	fmt.Println("\n# Books done")
	for i := range done {
		fmt.Println(i)
	}

	if len(ips) > 0 {
		fmt.Println("\n# Recent logs")
		for i := range logs {
			fmt.Printf("\n%s", i)
		}
	}
}