ocf_heartbeat_mpathpersist(7)

1OCF_HEARTBEAT_MPATHP(7)       OCF resource agents      OCF_HEARTBEAT_MPATHP(7)
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NAME

6       ocf_heartbeat_mpathpersist - Manages SCSI persistent reservations on
7       multipath devices
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SYNOPSIS

10       mpathpersist [start | stop | monitor | promote | demote | meta-data |
11                    validate-all]
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DESCRIPTION

14       This resource agent manages SCSI persistent reservations on multipath
15       devices. "mpathpersist" from multipath-tools is used, please see its
16       documentation. Should be used as multistate (Master/Slave) resource
17       Slave registers its node id ("crm_node -i") as reservation key (
18       --param-sark ) on each device in the params "devs" list. Master
19       reserves all devices from params "devs" list with reservation
20       "--prout-type" value from "reservation_type" parameter. Please see man
21       sg_persist(8) and mpathpersist(8) for reservation_type details.
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SUPPORTED PARAMETERS

24       binary
25           The name of the binary that manages the resource.
26
27           (optional, string, default "mpathpersist")
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29       devs
30           Device list. Multiple devices can be listed with blank space as
31           separator. Shell wildcards are allowed.
32
33           (required, string, no default)
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35       required_devs_no
36           Minimum number of "working" devices from device list 1) existing 2)
37           "mpathpersist --in --read-keys <device>" works (Return code 0)
38           resource actions "start","monitor","promote" and "validate-all"
39           return "OCF_ERR_INSTALLED" if the actual number of "working"
40           devices is less than "required_devs_no". resource actions "stop"
41           and "demote" tries to remove reservations and registration keys
42           from all working devices, but always return "OCF_SUCCESS"
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44           (optional, string, default "1")
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46       reservation_type
47           reservation type
48
49           (optional, string, default "1")
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51       master_score_base
52           master_score_base value "master_score_base" value is used in
53           "master_score" calculation: master_score = master_score_base +
54           master_score_dev_factor * working_devs if set to bigger value in
55           mpathpersist resource configuration on some node, this node will be
56           "preferred" for master role.
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58           (optional, string, default "0")
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60       master_score_dev_factor
61           Working device factor in master_score calculation each "working"
62           device provides additional value to "master_score", so the node
63           that sees more devices will be preferred for the "Master"-role
64           Setting it to 0 will disable this behavior.
65
66           (optional, string, default "100")
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68       master_score_delay
69           master/slave decreases/increases its master_score after delay of
70           "master_score_delay" seconds so if some device gets inaccessible,
71           the slave decreases its master_score first and the resource will no
72           be watched and after this device reappears again the master
73           increases its master_score first this can work only if the
74           master_score_delay is bigger then monitor interval on both master
75           and slave Setting it to 0 will disable this behavior.
76
77           (optional, string, default "30")
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SUPPORTED ACTIONS

80       This resource agent supports the following actions (operations):
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82       start
83           Starts the resource. Suggested minimum timeout: 30s.
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85       promote
86           Promotes the resource to the Master role. Suggested minimum
87           timeout: 30s.
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89       demote
90           Demotes the resource to the Slave role. Suggested minimum timeout:
91           30s.
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93       notify
94           Suggested minimum timeout: 30s.
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96       stop
97           Stops the resource. Suggested minimum timeout: 30s.
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99       monitor (Slave role)
100           Performs a detailed status check. Suggested minimum timeout: 20s.
101           Suggested interval: 29s.
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103       monitor (Master role)
104           Performs a detailed status check. Suggested minimum timeout: 20s.
105           Suggested interval: 60s.
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107       meta-data
108           Retrieves resource agent metadata (internal use only). Suggested
109           minimum timeout: 5s.
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111       validate-all
112           Performs a validation of the resource configuration. Suggested
113           minimum timeout: 30s.
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EXAMPLE CRM SHELL

116       The following is an example configuration for a mpathpersist resource
117       using the crm(8) shell:
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119           primitive p_mpathpersist ocf:heartbeat:mpathpersist \
120             params \
121               devs=string \
122             op monitor depth="0" timeout="20s" interval="29s" role="Slave" \
123             op monitor depth="0" timeout="20s" interval="60s" role="Master"
124
125           ms ms_mpathpersist p_mpathpersist \
126             meta notify="true" interleave="true"
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EXAMPLE PCS

129       The following is an example configuration for a mpathpersist resource
130       using pcs(8)
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132           pcs resource create p_mpathpersist ocf:heartbeat:mpathpersist \
133             devs=string \
134             op monitor OCF_CHECK_LEVEL="0" timeout="20s" interval="29s" role="Slave" \
135             op monitor OCF_CHECK_LEVEL="0" timeout="20s" interval="60s" role="Master" promotable
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AUTHOR

141       ClusterLabs contributors (see the resource agent source for information
142       about individual authors)
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146resource-agents UNKNOWN           04/06/2022           OCF_HEARTBEAT_MPATHP(7)