summaryrefslogtreecommitdiffstats
path: root/extras/ganesha/ocf/ganesha_grace
blob: 825f716459759c1ff8a7a24e5b2ba6f1a3518c2b (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
#!/bin/bash
#
# Copyright (c) 2014 Anand Subramanian anands@redhat.com
# Copyright (c) 2015 Red Hat Inc.
#                    All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like.  Any license provided herein, whether implied or
# otherwise, applies only to this software file.  Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
#

# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

if [ -n "$OCF_DEBUG_LIBRARY" ]; then
	. $OCF_DEBUG_LIBRARY
else
	: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
	. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
fi

OCF_RESKEY_grace_active_default="grace-active"
: ${OCF_RESKEY_grace_active=${OCF_RESKEY_grace_active_default}}

ganesha_meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="ganesha_grace">
<version>1.0</version>

<longdesc lang="en">
This Linux-specific resource agent acts as a dummy
resource agent for nfs-ganesha.
</longdesc>

<shortdesc lang="en">Manages the user-space nfs-ganesha NFS server</shortdesc>

<parameters>
<parameter name="grace_active">
<longdesc lang="en">NFS-Ganesha grace active attribute</longdesc>
<shortdesc lang="en">NFS-Ganesha grace active attribute</shortdesc>
<content type="string" default="grace-active" />
</parameter>
</parameters>

<actions>
<action name="start"   timeout="40s" />
<action name="stop"    timeout="40s" />
<action name="status"  timeout="20s" interval="60s" />
<action name="monitor" depth="0" timeout="10s" interval="5s" />
<action name="notify"  timeout="10s" />
<action name="meta-data"  timeout="20s" />
</actions>
</resource-agent>
END

return ${OCF_SUCCESS}
}

ganesha_grace_usage() {
	echo "ganesha.nfsd USAGE"
}

# Make sure meta-data and usage always succeed
case $__OCF_ACTION in
	meta-data)	ganesha_meta_data
			exit ${OCF_SUCCESS}
			;;
	usage|help)	ganesha_usage
			exit ${OCF_SUCCESS}
			;;
	*)
			;;
esac

ganesha_grace_start()
{
	local rc=${OCF_ERR_GENERIC}
	local host=$(hostname -s)

	ocf_log debug "ganesha_grace_start()"
	# give ganesha_mon RA a chance to set the crm_attr first
	# I mislike the sleep, but it's not clear that looping
	# with a small sleep is necessarily better
	# start has a 40sec timeout, so a 5sec sleep here is okay
        sleep 5
	attr=$(crm_attribute --query --node=${host} --name=${OCF_RESKEY_grace_active} 2> /dev/null)
        if [ $? -ne 0 ]; then
		host=$(hostname)
		attr=$(crm_attribute --query --node=${host} --name=${OCF_RESKEY_grace_active} 2> /dev/null )
                if [ $? -ne 0 ]; then
	                ocf_log info "grace start: crm_attribute --query --node=${host} --name=${OCF_RESKEY_grace_active} failed"
                fi
        fi

	# Three possibilities:
	# 1. There is no attribute at all and attr_updater returns
	#    a zero length string. This happens when
	#    ganesha_mon::monitor hasn't run at least once to set
	#    the attribute. The assumption here is that the system
	#    is coming up. We pretend, for now, that the node is
	#    healthy, to allow the system to continue coming up.
	#    It will cure itself in a few seconds
	# 2. There is an attribute, and it has the value "1"; this
	#    node is healthy.
	# 3. There is an attribute, but it has no value or the value
	#    "0"; this node is not healthy.

	# case 1
	if [[ -z "${attr}" ]]; then
		return ${OCF_SUCCESS}
	fi

	# case 2
	if [[ "${attr}" = *"value=1" ]]; then
		return ${OCF_SUCCESS}
	fi

	# case 3
	return ${OCF_NOT_RUNNING}
}

ganesha_grace_stop()
{

	ocf_log debug "ganesha_grace_stop()"
	return ${OCF_SUCCESS}
}

ganesha_grace_notify()
{
        # since this is a clone RA we should only ever see pre-start
        # or post-stop
	mode="${OCF_RESKEY_CRM_meta_notify_type}-${OCF_RESKEY_CRM_meta_notify_operation}"
	case "${mode}" in
	pre-start | post-stop)
		dbus-send --print-reply --system --dest=org.ganesha.nfsd /org/ganesha/nfsd/admin org.ganesha.nfsd.admin.grace string:${OCF_RESKEY_CRM_meta_notify_stop_uname}
		if [ $? -ne 0 ]; then
			ocf_log info "dbus-send --print-reply --system --dest=org.ganesha.nfsd /org/ganesha/nfsd/admin org.ganesha.nfsd.admin.grace string:${OCF_RESKEY_CRM_meta_notify_stop_uname} failed"
		fi
		;;
	esac

	return ${OCF_SUCCESS}
}

ganesha_grace_monitor()
{
	local host=$(hostname -s)

	ocf_log debug "monitor"

	attr=$(crm_attribute --query --node=${host} --name=${OCF_RESKEY_grace_active} 2> /dev/null)
        if [ $? -ne 0 ]; then
		host=$(hostname)
	        attr=$(crm_attribute --query --node=${host} --name=${OCF_RESKEY_grace_active} 2> /dev/null)
                if [ $? -ne 0 ]; then
	                ocf_log info "crm_attribute --query --node=${host} --name=${OCF_RESKEY_grace_active} failed"
                fi
        fi

	# if there is no attribute (yet), maybe it's because
	# this RA started before ganesha_mon (nfs-mon) has had
	# chance to create it. In which case we'll pretend
	# everything is okay this time around
	if [[ -z "${attr}" ]]; then
		return ${OCF_SUCCESS}
	fi

	if [[ "${attr}" = *"value=1" ]]; then
		return ${OCF_SUCCESS}
	fi

	return ${OCF_NOT_RUNNING}
}

ganesha_grace_validate()
{
	return ${OCF_SUCCESS}
}

ganesha_grace_validate

# Translate each action into the appropriate function call
case $__OCF_ACTION in
start)          ganesha_grace_start
		;;
stop)           ganesha_grace_stop
		;;
status|monitor) ganesha_grace_monitor
		;;
notify)         ganesha_grace_notify
		;;
*)              ganesha_grace_usage
		exit ${OCF_ERR_UNIMPLEMENTED}
		;;
esac

rc=$?

# The resource agent may optionally log a debug message
ocf_log debug "${OCF_RESOURCE_INSTANCE} ${__OCF_ACTION} returned $rc"
exit $rc