Refactored multipath support

README.rst

                   size: 40G
                   mount: ${linux:storage:mount:data}
 
+
+Multipath with Fujitsu Eternus DXL
+
+.. code-block:: yaml
+
+    parameters:
+      linux:
+        storage:
+          multipath:
+            enabled: true
+            blacklist_devices:
+            - /dev/sda
+            - /dev/sdb
+            backends:
+            - fujitsu_eternus_dxl
+
+Multipath with Hitachi VSP 1000
+
+.. code-block:: yaml
+
+    parameters:
+      linux:
+        storage:
+          multipath:
+            enabled: true
+            blacklist_devices:
+            - /dev/sda
+            - /dev/sdb
+            backends:
+            - hitachi_vsp1000
+
+Multipath with IBM Storwize
+
+.. code-block:: yaml
+
+    parameters:
+      linux:
+        storage:
+          multipath:
+            enabled: true
+            blacklist_devices:
+            - /dev/sda
+            - /dev/sdb
+            backends:
+            - ibm_storwize
+
+Multipath with multiple backends
+
+.. code-block:: yaml
+
+    parameters:
+      linux:
+        storage:
+          multipath:
+            enabled: true
+            blacklist_devices:
+            - /dev/sda
+            - /dev/sdb
+            - /dev/sdc
+            - /dev/sdd
+            backends:
+            - ibm_storwize
+            - fujitsu_eternus_dxl
+            - hitachi_vsp1000
+
+Disabled multipath (the default setup)
+
+.. code-block:: yaml
+
+    parameters:
+      linux:
+        storage:
+          multipath:
+            enabled: false
+
+
 Usage
 =====
 

linux/files/multipath.conf

 {%- from "linux/map.jinja" import storage with context %}
 ##
-## This is a template multipath-tools configuration file
-## Uncomment the lines relevent to your environment
+## This is multipath-tools configuration file managed by Salt
 ##
-{% set backend = storage.get('backend', 'default') %}
-
-{%- if backend in ['hitachi', 'hds', 'HDS'] %}
 
 defaults {
-#	udev_dir		/dev
-#	polling_interval 	10
-#	selector		"round-robin 0"
-#	path_grouping_policy	multibus
-#	getuid_callout		"/lib/udev/scsi_id --whitelisted --device=/dev/%n"
-#	prio			const
-#	path_checker		directio
-#	rr_min_io		100
-#	flush_on_last_del	no
-#	max_fds			8192
-#	rr_weight		priorities
-#	failback		immediate
-#	no_path_retry		fail
-#	queue_without_daemon    no
-	user_friendly_names	no
-#	mode			644
-#	uid			0
-#	gid			disk
+#       getuid_callout        "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
+        user_friendly_names   no
 }
 
-{%- elif backend in ['fujitsu'] %}
-defaults {
-                user_friendly_names no
-}
 blacklist {
-        wwid "355cd2e404b76b*"
-}
-devices {
-         device {
-                 vendor                  "FUJITSU"
-                 product                 "ETERNUS_DXL"
-                 prio                    alua
-                 path_grouping_policy    group_by_prio
-                 path_selector           "round-robin 0"
-                 failback                immediate
-                 no_path_retry           0
-                 path_checker            tur
-                 dev_loss_tmo            2097151
-                 fast_io_fail_tmo        1
-          }
-}
-
-{%- else %}
-
-defaults {
-	getuid_callout		"/lib/udev/scsi_id --whitelisted --device=/dev/%n"
-	user_friendly_names	no
+        {%- for device in storage.multipath.get('blacklist_devices', []) %}
+        wwid                  {{ salt['cmd.run']('/lib/udev/scsi_id -g -u '+device) }}
+        {%- endfor %}
+        devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st|nbd)[0-9]*"
 }
 
-blacklist {
-#       wwid 26353900f02796769
-#	devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
-#	devnode "^hd[a-z][[0-9]*]"
-#	device {
-#		vendor DEC.*
-#		product MSA[15]00
-#	}
-        #
-        #  POZOR - filtrace vseho krome blacklistovanych veci
-        #
-#        wwid "*"
-}
-blacklist_exceptions {
-#       devnode "^dasd[c-d]+[0-9]*"
-#       wwid    "IBM.75000000092461.4d00.34"
-#	wwid	3600507680280050cd000000000000035
-#	wwid	3600507680280050cd000000000000030
-#	wwid	3600507680280050cd0000000000000ac
-#	wwid	3600507680280050cd0000000000003df
-	wwid "*"
-}
 devices {
-	device {
-		vendor "IBM"
-		product "2145"
-		path_grouping_policy group_by_prio
-		getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
-		features "1 queue_if_no_path"
-		prio alua
-		path_checker tur
-		failback immediate
-		no_path_retry "5"
-		rr_min_io 1
- 		polling_interval 30
-		dev_loss_tmo 120
-	}
+        {%- for backend in storage.multipath.get('backends', []) %}
+        {%- include "linux/files/multipath/_" + backend + ".conf" %}
+        {%- endfor %}
 }
-{%- endif %}

linux/files/multipath.conf.hds

-##
-## This is a template multipath-tools configuration file
-## Uncomment the lines relevent to your environment
-##
-defaults {
-#	udev_dir		/dev
-#	polling_interval 	10
-#	selector		"round-robin 0"
-#	path_grouping_policy	multibus
-#	getuid_callout		"/lib/udev/scsi_id --whitelisted --device=/dev/%n"
-#	prio			const
-#	path_checker		directio
-#	rr_min_io		100
-#	flush_on_last_del	no
-#	max_fds			8192
-#	rr_weight		priorities
-#	failback		immediate
-#	no_path_retry		fail
-#	queue_without_daemon    no
-	user_friendly_names	no
-#	mode			644
-#	uid			0
-#	gid			disk
-}

linux/files/multipath/_fujitsu_eternus_dxl.conf

+
+        device {
+                vendor                  "FUJITSU"
+                product                 "ETERNUS_DXL"
+                prio                    alua
+                path_grouping_policy    group_by_prio
+                path_selector           "round-robin 0"
+                failback                immediate
+                no_path_retry           0 (*1)
+                path_checker            tur
+                dev_loss_tmo            2097151 (*2)
+                fast_io_fail_tmo        1
+        }

linux/files/multipath/_hitachi_vsp1000.conf

+
+# vsp1000 does not have special device config

linux/files/multipath/_ibm_storwize.conf

+
+        device {
+                vendor "IBM"
+                product "2145"
+                path_grouping_policy group_by_prio
+                getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
+                features "1 queue_if_no_path"
+                prio alua
+                path_checker tur
+                failback immediate
+                no_path_retry "5"
+                rr_min_io 1
+                polling_interval 30
+                dev_loss_tmo 120
+        }

linux/map.jinja

         'mount': {},
         'swap': {},
         'lvm': {},
-        'multipath': False,
+        'multipath': {
+             'enabled': False,
+             'pkgs': ['multipath-tools', 'multipath-tools-boot'],
+             'service': ''
+         },
     },
     'Debian': {
         'mount': {},
         'swap': {},
         'lvm': {},
-        'multipath': False,
-        'multipath_pkgs': ['multipath-tools'],
+        'multipath': {
+             'enabled': False,
+             'pkgs': ['multipath-tools', 'multipath-tools-boot'],
+             'service': 'multipath-tools'
+         },
         'lvm_pkgs': ['lvm2'],
     },
     'RedHat': {
         'mount': {},
         'swap': {},
         'lvm': {},
-        'multipath': False,
+        'multipath': {
+             'enabled': False,
+             'pkgs': [],
+             'service': 'multipath'
+         },
     },
 }, grain='os_family', merge=salt['pillar.get']('linux:storage')) %}

linux/storage/init.sls

 {%- if storage.lvm|length > 0 %}
 - linux.storage.lvm
 {%- endif %}
-{%- if storage.multipath %}
+{%- if storage.multipath.enabled %}
 - linux.storage.multipath
 {%- endif %}
 {%- endif %}

linux/storage/multipath.sls

 {%- from "linux/map.jinja" import storage with context %}
-{%- if storage.enabled %}
+{%- if storage.enabled and storage.multipath.enabled %}
 
-{%- if grains.os_family == 'Debian' %}
-
-linux_multipath_pkgs:
-  pkg.installed:
-  - names: {{ storage.multipath_pkgs }}
-
-{%- if storage.multipath.backend not in ['fujitsu'] %}
-
-linux_multipath_boot_pkg:
+linux_storage_multipath_packages:
   pkg.installed:
-  - name: multipath-tools-boot
-
-{%- endif %}
-
-{%- if storage.multipath.backend == 'HDS' %}
-
-/etc/multipath.conf:
-  file.managed:
-  - source: salt://linux/files/multipath.conf.hds
-  - template: jinja
-  - require:
-    - pkg: linux_multipath_pkgs
-
-{%- else %}
+  - names: {{ storage.multipath.pkgs }}
 
-/etc/multipath.conf:
+linux_storage_multipath_config:
   file.managed:
+  - name: /etc/multipath.conf
   - source: salt://linux/files/multipath.conf
   - template: jinja
   - require:
-    - pkg: linux_multipath_pkgs
+    - pkg: linux_storage_multipath_packages
 
-{%- endif %}
-
-multipath_service:
+linux_storage_multipath_service:
   service.running:
-  - enable: True
-  - name: multipath-tools
+  - enable: true
+  - name: {{ storage.multipath.service }}
   - watch:
-    - file: /etc/multipath.conf
+    - file: linux_storage_multipath_config
   - sig: multipathd
 
 {%- endif %}
-
-{%- endif %}