-
Notifications
You must be signed in to change notification settings - Fork 108
/
wait-for-it.sh
executable file
·178 lines (166 loc) · 4.96 KB
/
wait-for-it.sh
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
#!/usr/bin/env bash
# Use this script to test if a given TCP host/port are available
WAITFORIT_cmdname=${0##*/}
echoerr() { if [[ $WAITFORIT_QUIET -ne 1 ]]; then echo "$@" 1>&2; fi }
usage()
{
cat << USAGE >&2
Usage:
$WAITFORIT_cmdname host:port [-s] [-t timeout] [-- command args]
-h HOST | --host=HOST Host or IP under test
-p PORT | --port=PORT TCP port under test
Alternatively, you specify the host and port as host:port
-s | --strict Only execute subcommand if the test succeeds
-q | --quiet Don't output any status messages
-t TIMEOUT | --timeout=TIMEOUT
Timeout in seconds, zero for no timeout
-- COMMAND ARGS Execute command with args after the test finishes
USAGE
exit 1
}
wait_for()
{
if [[ $WAITFORIT_TIMEOUT -gt 0 ]]; then
echoerr "$WAITFORIT_cmdname: waiting $WAITFORIT_TIMEOUT seconds for $WAITFORIT_HOST:$WAITFORIT_PORT"
else
echoerr "$WAITFORIT_cmdname: waiting for $WAITFORIT_HOST:$WAITFORIT_PORT without a timeout"
fi
WAITFORIT_start_ts=$(date +%s)
while :
do
if [[ $WAITFORIT_ISBUSY -eq 1 ]]; then
nc -z $WAITFORIT_HOST $WAITFORIT_PORT
WAITFORIT_result=$?
else
(echo > /dev/tcp/$WAITFORIT_HOST/$WAITFORIT_PORT) >/dev/null 2>&1
WAITFORIT_result=$?
fi
if [[ $WAITFORIT_result -eq 0 ]]; then
WAITFORIT_end_ts=$(date +%s)
echoerr "$WAITFORIT_cmdname: $WAITFORIT_HOST:$WAITFORIT_PORT is available after $((WAITFORIT_end_ts - WAITFORIT_start_ts)) seconds"
break
fi
sleep 1
done
return $WAITFORIT_result
}
wait_for_wrapper()
{
# In order to support SIGINT during timeout: http://unix.stackexchange.com/a/57692
if [[ $WAITFORIT_QUIET -eq 1 ]]; then
timeout $WAITFORIT_BUSYTIMEFLAG $WAITFORIT_TIMEOUT $0 --quiet --child --host=$WAITFORIT_HOST --port=$WAITFORIT_PORT --timeout=$WAITFORIT_TIMEOUT &
else
timeout $WAITFORIT_BUSYTIMEFLAG $WAITFORIT_TIMEOUT $0 --child --host=$WAITFORIT_HOST --port=$WAITFORIT_PORT --timeout=$WAITFORIT_TIMEOUT &
fi
WAITFORIT_PID=$!
trap "kill -INT -$WAITFORIT_PID" INT
wait $WAITFORIT_PID
WAITFORIT_RESULT=$?
if [[ $WAITFORIT_RESULT -ne 0 ]]; then
echoerr "$WAITFORIT_cmdname: timeout occurred after waiting $WAITFORIT_TIMEOUT seconds for $WAITFORIT_HOST:$WAITFORIT_PORT"
fi
return $WAITFORIT_RESULT
}
# process arguments
while [[ $# -gt 0 ]]
do
case "$1" in
*:* )
WAITFORIT_hostport=(${1//:/ })
WAITFORIT_HOST=${WAITFORIT_hostport[0]}
WAITFORIT_PORT=${WAITFORIT_hostport[1]}
shift 1
;;
--child)
WAITFORIT_CHILD=1
shift 1
;;
-q | --quiet)
WAITFORIT_QUIET=1
shift 1
;;
-s | --strict)
WAITFORIT_STRICT=1
shift 1
;;
-h)
WAITFORIT_HOST="$2"
if [[ $WAITFORIT_HOST == "" ]]; then break; fi
shift 2
;;
--host=*)
WAITFORIT_HOST="${1#*=}"
shift 1
;;
-p)
WAITFORIT_PORT="$2"
if [[ $WAITFORIT_PORT == "" ]]; then break; fi
shift 2
;;
--port=*)
WAITFORIT_PORT="${1#*=}"
shift 1
;;
-t)
WAITFORIT_TIMEOUT="$2"
if [[ $WAITFORIT_TIMEOUT == "" ]]; then break; fi
shift 2
;;
--timeout=*)
WAITFORIT_TIMEOUT="${1#*=}"
shift 1
;;
--)
shift
WAITFORIT_CLI=("$@")
break
;;
--help)
usage
;;
*)
echoerr "Unknown argument: $1"
usage
;;
esac
done
if [[ "$WAITFORIT_HOST" == "" || "$WAITFORIT_PORT" == "" ]]; then
echoerr "Error: you need to provide a host and port to test."
usage
fi
WAITFORIT_TIMEOUT=${WAITFORIT_TIMEOUT:-15}
WAITFORIT_STRICT=${WAITFORIT_STRICT:-0}
WAITFORIT_CHILD=${WAITFORIT_CHILD:-0}
WAITFORIT_QUIET=${WAITFORIT_QUIET:-0}
# check to see if timeout is from busybox?
WAITFORIT_TIMEOUT_PATH=$(type -p timeout)
WAITFORIT_TIMEOUT_PATH=$(realpath $WAITFORIT_TIMEOUT_PATH 2>/dev/null || readlink -f $WAITFORIT_TIMEOUT_PATH)
if [[ $WAITFORIT_TIMEOUT_PATH =~ "busybox" ]]; then
WAITFORIT_ISBUSY=1
WAITFORIT_BUSYTIMEFLAG=""
else
WAITFORIT_ISBUSY=0
WAITFORIT_BUSYTIMEFLAG="-t"
fi
if [[ $WAITFORIT_CHILD -gt 0 ]]; then
wait_for
WAITFORIT_RESULT=$?
exit $WAITFORIT_RESULT
else
if [[ $WAITFORIT_TIMEOUT -gt 0 ]]; then
wait_for_wrapper
WAITFORIT_RESULT=$?
else
wait_for
WAITFORIT_RESULT=$?
fi
fi
if [[ $WAITFORIT_CLI != "" ]]; then
if [[ $WAITFORIT_RESULT -ne 0 && $WAITFORIT_STRICT -eq 1 ]]; then
echoerr "$WAITFORIT_cmdname: strict mode, refusing to execute subprocess"
exit $WAITFORIT_RESULT
fi
exec "${WAITFORIT_CLI[@]}"
else
exit $WAITFORIT_RESULT
fi