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config: new option dmeventd/thin_command

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This setting will allowing configuring which command gets executed
when thin-pool fullness goes from 50%..100%
This commit is contained in:
Zdenek Kabelac 2017-01-18 09:54:32 +01:00
parent ee754500db
commit 04a9cad499
4 changed files with 16 additions and 0 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.169 -
=====================================
Introduce new dmeventd/thin_command configurable setting.
Use new default units 'r' for displaying sizes.
Also unmount mount point on top of MD device if using blkdeactivate -u.
Restore check preventing resize of cache type volumes (2.02.158).

8
conf/example.conf.in
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@ -2049,6 +2049,14 @@ dmeventd {
# warning is repeated when 85%, 90% and 95% of the pool is filled.
thin_library = "libdevmapper-event-lvm2thin.so"
# Configuration option dmeventd/thin_command.
# The plugin runs command with each 5% increment when thin-pool data volume
# or metadata volume gets above 50%.
# Command which starts with 'lvm ' prefix is internal lvm command.
# You can write your own handler to customise behaviour in more details.
# This configuration option has an automatic default value.
# thin_command = "lvm lvextend --use-policies"
# Configuration option dmeventd/executable.
# The full path to the dmeventd binary.
# This configuration option has an automatic default value.

6
lib/config/config_settings.h
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@ -1859,6 +1859,12 @@ cfg(dmeventd_thin_library_CFG, "thin_library", dmeventd_CFG_SECTION, 0, CFG_TYPE
"and emits a warning through syslog when the usage exceeds 80%. The\n"
"warning is repeated when 85%, 90% and 95% of the pool is filled.\n")
cfg(dmeventd_thin_command_CFG, "thin_command", dmeventd_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_DMEVENTD_THIN_COMMAND, vsn(2, 2, 169), NULL, 0, NULL,
"The plugin runs command with each 5% increment when thin-pool data volume\n"
"or metadata volume gets above 50%.\n"
"Command which starts with 'lvm ' prefix is internal lvm command.\n"
"You can write your own handler to customise behaviour in more details.\n")
cfg(dmeventd_executable_CFG, "executable", dmeventd_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_DMEVENTD_PATH, vsn(2, 2, 73), "@DMEVENTD_PATH@", 0, NULL,
"The full path to the dmeventd binary.\n")

1
lib/config/defaults.h
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@ -81,6 +81,7 @@
#define DEFAULT_DMEVENTD_MIRROR_LIB "libdevmapper-event-lvm2mirror.so"
#define DEFAULT_DMEVENTD_SNAPSHOT_LIB "libdevmapper-event-lvm2snapshot.so"
#define DEFAULT_DMEVENTD_THIN_LIB "libdevmapper-event-lvm2thin.so"
#define DEFAULT_DMEVENTD_THIN_COMMAND "lvm lvextend --use-policies"
#define DEFAULT_DMEVENTD_MONITOR 1
#define DEFAULT_BACKGROUND_POLLING 1