Driver disk.hp3par

Minimal configlet:

[disk#1]
type = hp3par
array = myarray
group = u

Minimal setup command:

om test/vol/foo set \
	--kw="type=hp3par" \
	--kw="array=myarray" \
	--kw="group=u"

Supported keywords:

• array
• auto_takeover
• blocking_post_provision
• blocking_post_start
• blocking_post_stop
• blocking_post_unprovision
• blocking_pre_provision
• blocking_pre_start
• blocking_pre_stop
• blocking_pre_unprovision
• comment
• disable
• encap
• force_sync
• group
• max_delay
• mode
• monitor
• no_preempt_abort
• optional
• pg_blkio_weight
• pg_cpu_burst
• pg_cpu_quota
• pg_cpu_shares
• pg_cpus
• pg_mem_high
• pg_mem_limit
• pg_mem_oom_control
• pg_mem_swappiness
• pg_mems
• pg_pids_max
• pg_vmem_limit
• post_provision
• post_start
• post_stop
• post_unprovision
• pre_provision
• pre_start
• pre_stop
• pre_unprovision
• prkey
• promote_rw
• provision
• provision_requires
• restart
• restart_delay
• scsireserv
• shared
• standby
• start_requires
• start_timeout
• stat_timeout
• stop_requires
• subset
• swap_roles
• tags
• timeout
• type
• unprovision
• unprovision_requires
• update_requires

Keyword array

required:    true
scopable:    true
rbac:        This driver group requires the root grant.

Example:

array=myarray

Description:

Suffix of the array configuration section in cluster.conf (the part after # in array#<suffix>).

Keyword auto_takeover

required:    false
scopable:    true
default:     false
convert:     bool
rbac:        This driver group requires the root grant.

Description:

Allow failover when the arrays are split.

Keyword blocking_post_provision

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute after the resource provision action.

Errors interrupt the action.

This trigger is only executed on leaders.

Keyword blocking_post_start

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute after the resource start action.

Errors interrupt the action.

Keyword blocking_post_stop

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute after the resource stop action.

Errors interrupt the action.

Keyword blocking_post_unprovision

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute after the resource unprovision action.

Errors interrupt the action.

This trigger is only executed on leaders.

Keyword blocking_pre_provision

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute before the resource provision action.

Errors interrupt the action.

Keyword blocking_pre_start

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute before the resource start action.

Errors interrupt the action.

Keyword blocking_pre_stop

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute before the resource stop action.

Errors interrupt the action.

Keyword blocking_pre_unprovision

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute before the resource unprovision action.

Errors interrupt the action.

Keyword comment

required:    false
scopable:    false
rbac:        This driver group requires the root grant.

Description:

A free form text describing the role of the object, of the node, or of the section it is set in.

The keyword is accepted in any section, so the DEFAULT section can document a configuration as a whole, and a resource, pool, heartbeat, array or network section can document itself.

The agent does not interpret the value.

Keyword disable

required:    false
scopable:    true
convert:     bool
rbac:        This driver group requires the root grant.

Description:

A disabled resource will be ignored on start, stop, provision and unprovision actions.

A disabled resource status is n/a.

If set in the DEFAULT section of an object, the object is disabled and ignores start, stop, shutdown, provision and unprovision actions.

These actions immediately return success.

om <path> disable sets DEFAULT.disable=true.

om <path> enable sets DEFAULT.disable=false.

Note: The enable and disable actions preserve the individual resource disable state.

Keyword encap

required:    false
scopable:    false
convert:     bool
rbac:        This driver group requires the root grant.

Description:

Set to true to ignore this resource in the nodes context and consider it in the encapnodes context. The resource is thus handled by agents deployed in the service containers.

Keyword force_sync

required:    false
scopable:    false
default:     false
convert:     bool
rbac:        This driver group requires the root grant.

Description:

Trigger a sync before migrate if the rcg mode is Periodic.

Keyword group

required:    true
scopable:    true
aliases:     rcg
rbac:        This driver group requires the root grant.

Example:

group=u

Description:

Name of the Remote Copy Group (RCG) for volume replication.

Keyword max_delay

required:    false
scopable:    false
aliases:     sync_max_delay
convert:     duration
rbac:        This driver group requires the root grant.

Default:

Two times the rcg sync period. Description:

The delay above which the status log of the resource reports a warning about last sync too old.

It should be set according to your application service level agreement.

The rcp sync period should be lower than max_delay minus the expected sync duration.

Keyword mode

required:    false
scopable:    true
default:     sync
rbac:        This driver group requires the root grant.

Example:

mode=sync

Description:

Replication mode. Supported values: sync, async (periodic).

Keyword monitor

required:    false
scopable:    true
convert:     bool
rbac:        This driver group requires the root grant.

Description:

A resource with monitor=true will trigger the monitor_action (crash or reboot the node, freezestop or switch the service) if:

• The resource is down.

• The instance has local_expect=started in its daemon monitor data, which means the daemon considers this instance is and should remain started.

• All restart tentatives failed.

Keyword no_preempt_abort

required:    false
scopable:    true
convert:     bool
rbac:        This driver group requires the root grant.

Description:

If true, the agent will preempt the scsi3 persistent reservation with a preempt command instead of a preempt and and abort.

Some scsi target implementations do not support preempt and and abort (esx).

Keyword optional

required:    false
scopable:    true
convert:     bool
rbac:        This driver group requires the root grant.

Description:

Action errors on optional resources are logged but do not interrupt the action sequence.

The status of optional resources is not included in the instance availability status but is considered in the overall status.

The status of task and sync resources is always included in the overall status, regardless of whether they are marked as optional.

Resources tagged as noaction are considered optional by default.

Dump filesystems are a typical use case for optional=true.

Keyword pg_blkio_weight

required:    false
scopable:    true
rbac:        This driver group requires the root grant.

Example:

pg_blkio_weight=50

Description:

Block IO relative weight. Value: between 10 and 1000.

The kernel default is 100.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_cpu_burst

required:    false
scopable:    true
rbac:        This driver group requires the root grant.

Example:

pg_cpu_burst=20%

Description:

The cpu time the group banks under its quota, and spends above it.

It is the time the processes of the group may bank while under their pg_cpu_quota, and spend above it in a short spike, in the notation of pg_cpu_quota: 20% lets the group run a fifth of a cpu above its quota during a period, out of what it left unused before.

It serves a latency-sensitive service capped tightly: a request arriving after an idle spell is served at the speed of the burst, rather than throttled for the rest of the period. Over a longer time the group still uses no more than its quota.

It needs pg_cpu_quota, and cannot exceed it: the kernel refuses a burst larger than the quota. Only the unified cgroup hierarchy has it.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_cpu_quota

required:    false
scopable:    true
rbac:        This driver group requires the root grant.

Example:

pg_cpu_quota=50%@all

Description:

The percentage of cpu time the processes of the group may use.

Accepted expressions:

• 50% Half of one cpu.

• 50%@all Half of every cpu the node has.

• 10%@2 A tenth of two cpus.

Unlike pg_cpu_shares, which only arbitrates when the node is cpu-bound, a quota caps the group whether or not the node is busy.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_cpu_shares

required:    false
scopable:    true
convert:     size
rbac:        This driver group requires the root grant.

Example:

pg_cpu_shares=512

Description:

The share of cpu the group gets when the node is cpu-bound.

The share is relative to the other groups.

The actual percentile depends on the shares allowed to the other services. Unset, the kernel default is used, which usually is 1024 shares.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_cpus

required:    false
scopable:    true
depends:     create_pg=true
rbac:        This driver group requires the root grant.

Example:

pg_cpus=0-2

Description:

The cpus the processes of the group may run on.

Cpus are specified as list or range : 0,1,2 or 0-2.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_mem_high

required:    false
scopable:    true
convert:     size
rbac:        This driver group requires the root grant.

Example:

pg_mem_high=384m

Description:

The memory past which the kernel throttles the group, in bytes.

Past it, the kernel slows the processes of the group down, reclaiming their memory and throttling their allocations.

Unlike pg_mem_limit, reaching it does not wake the Out-Of-Memory killer: a group above it keeps running, slower, while the kernel reclaims. Set below pg_mem_limit, it gives a process growing too much the time to be noticed, or to shrink, before it is killed.

It is a soft limit, so it is not what a memory claim counts: the claim counts pg_mem_limit. Only the unified cgroup hierarchy has it.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_mem_limit

required:    false
scopable:    true
convert:     size
rbac:        This driver group requires the root grant.

Example:

pg_mem_limit=512m

Description:

The memory the processes of the group may use, in bytes.

The Out-Of-Memory killer is triggered in case of tresspassing.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_mem_oom_control

required:    false
scopable:    true
rbac:        This driver group requires the root grant.

Example:

pg_mem_oom_control=1

Description:

Whether the Out of Memory killer runs for the group: 0 enables it.

It is a flag (0 or 1) enabling or disabling the Out of Memory killer for the processes of the group.

• If enabled (0), tasks that attempt to consume more memory than they are allowed are immediately killed by the OOM killer.
• If disabled (1), tasks are allowed to continue to try allocating memory, stressing the system.

The OOM killer is enabled by default in every cgroup using the memory controller.

This keyword caps nothing on a node holding the unified cgroup hierarchy, which has no memory.oom_control: that file is of the v1 hierarchy. Setting it there is warned about, and ignored.

Keyword pg_mem_swappiness

required:    false
scopable:    true
rbac:        This driver group requires the root grant.

Example:

pg_mem_swappiness=40

Description:

Set a swappiness percentile value for the process group.

This keyword caps nothing on a node holding the unified cgroup hierarchy, which has no memory.swappiness: that file is of the v1 hierarchy. Setting it there is warned about, and ignored.

Keyword pg_mems

required:    false
scopable:    true
rbac:        This driver group requires the root grant.

Example:

pg_mems=0-2

Description:

The memory nodes the processes of the group may allocate from.

Memory nodes are specified as list or range : 0,1,2 or 0-2.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_pids_max

required:    false
scopable:    true
rbac:        This driver group requires the root grant.

Example:

pg_pids_max=512

Description:

The most processes and threads the group may run at once.

A fork beyond it fails in the process that asked for it, and nothing else of the node is touched: it is what keeps a runaway fork loop from exhausting the process table of the node.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword pg_vmem_limit

required:    false
scopable:    true
convert:     size
rbac:        This driver group requires the root grant.

Example:

pg_vmem_limit=1g

Description:

The memory plus swap the processes of the group may use, in bytes.

The Out-Of-Memory killer is triggered in case of tresspassing. The specified value must be greater than pg_mem_limit.

Setting this keyword to default puts the capping back where a node that never capped anything leaves it. Removing the keyword does not: what was written stays written, whether om wrote it or something else did.

Keyword post_provision

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute after the resource provision action.

Errors do not interrupt the action.

This trigger is only executed on leaders.

Keyword post_start

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute after the resource start action.

Errors do not interrupt the action.

Keyword post_stop

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute after the resource stop action.

Errors do not interrupt the action.

Keyword post_unprovision

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute after the resource unprovision action.

Errors do not interrupt the action.

This trigger is only executed on leaders.

Keyword pre_provision

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute before the resource provision action.

Errors do not interrupt the action.

Keyword pre_start

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute before the resource start action.

Errors do not interrupt the action.

Keyword pre_stop

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute before the resource stop action.

Errors do not interrupt the action.

Keyword pre_unprovision

required:    false
scopable:    true
rbac:        Triggers require the root grant.

Description:

A command or script to execute before the resource unprovision action.

Errors do not interrupt the action.

Keyword prkey

required:    false
scopable:    true
default:     {node.node.prkey}
rbac:        This driver group requires the root grant.

Description:

A specific scsi3 persistent reservation key for the resource.

It overrides the object-level prkey and the node-level prkey.

Keyword promote_rw

required:    false
scopable:    false
convert:     bool
rbac:        This driver group requires the root grant.

Description:

If true, OpenSVC will try to promote the exposed devices to read-write on start actions.

Keyword provision

required:    false
scopable:    false
default:     true
convert:     bool
rbac:        This driver group requires the root grant.

Description:

Set to false to ignore the provision and unprovision actions on the resource.

Warning: provision and unprovision use data-destructive operations like formatting.

It is recommended to set provision=false on long-lived critical objects, to force administrators to remove this setting when they really want to destroy data.

Keyword provision_requires

required:    false
scopable:    false
rbac:        This driver group requires the root grant.

Example:

provision_requires=ip#0 fs#0(down,stdby down)

Description:

A whitespace-separated list of conditions to meet to accept a ‘provision’ action.

A condition is expressed as <rid>(<state>,...).

If states are omitted, up,stdby up is used as the default expected states.

Keyword restart

required:    false
scopable:    true
default:     0
convert:     int
rbac:        This driver group requires the root grant.

Description:

The daemon will try to restart a resource if:

• The resource is down, stdby down or warn.

• The instance has local_expect=started in its daemon monitor data, which means the daemon considers this instance is and should remain started.

• The node is not frozen

• The instance is not frozen

In this case, the daemon try restart=<n> times before falling back to the monitor action.

The restart_delay keyword sets the interval after a failed restart before the next tentative.

Resources with standby=true have restart forced to a minimum of 2, to increase chances of a restart success.

Keyword restart_delay

required:    false
scopable:    true
default:     500ms
convert:     duration
rbac:        This driver group requires the root grant.

Description:

The minimum delay between two restart tentatives on the resource.

Keyword scsireserv

required:    false
scopable:    false
convert:     bool
rbac:        This driver group requires the root grant.

Description:

If true, try to acquire a type-5 (write exclusive, registrant only) scsi3 persistent reservation on every path to every disk used by this resource.

Existing reservations are preempted to not block service failover.

If the start was not legitimate the data are still protected from being written concurrently from all nodes.

Keyword shared

required:    false
scopable:    true
convert:     bool
rbac:        This driver group requires the root grant.

Description:

If true, the resource will be considered shared during provision and unprovision actions.

A shared resource driver can implement a different behaviour depending on weither it is run from the leader instance, or not:

• When --leader is set, the driver creates and configures the system objects. For example the disk.disk driver allocates a SAN disk and discover its block devices.

• When --leader is not set, the driver does not redo the actions already done by the leader, but may do some. For example, the disk.disk driver skips the SAN disk allocation, but discovers the block devices.

The daemon takes care of setting the --leader flags on the commands it submits during deploy, purge, provision and unprovision orchestrations.

Warning: If admins want to submit --local provision or unprovision commands themselves, they have to set the --leader flag correctly.

Flex objects usually don’t use shared resources. But if they do, only the flex primary gets --leader commands.

Warning: All resources depending on a shared resource must also be flagged as shared.

Keyword standby

required:    false
scopable:    true
convert:     bool
rbac:        This driver group requires the root grant.

Description:

If true, always start the resource, even on non-started instances.

The daemon is responsible for starting standby resources.

A resource can be set standby on a subset of nodes using keyword scoping.

A typical use-case is a synchronized filesystem on non-shared disks. The remote filesystem must be mounted to not overflow the underlying filesystem.

Warning: In most situation, don’t set shared resources standby, a non-clustered fs on shared disks for example.

Keyword start_requires

required:    false
scopable:    false
rbac:        This driver group requires the root grant.

Example:

start_requires=ip#0 fs#0(down,stdby down)

Description:

A whitespace-separated list of conditions to meet to accept a ‘start’ action.

A condition is expressed as <rid>(<state>,...).

If states are omitted, up,stdby up is used as the default expected states.

Keyword start_timeout

required:    false
scopable:    true
default:     5m
convert:     duration
rbac:        This driver group requires the root grant.

Example:

start_timeout=5m

Description:

Maximum duration to wait for start operations to complete.

Keyword stat_timeout

required:    false
scopable:    true
convert:     duration
rbac:        This driver group requires the root grant.

Description:

The fs resources status evaluation includes a stat syscall test. This keyword defines the maximum wait time for those stat calls to respond.

When expired, the resource status is degraded is to warn, which can trigger a monitor action (reboot or crash the node) if the resource is monitored.

Keyword stop_requires

required:    false
scopable:    false
rbac:        This driver group requires the root grant.

Example:

stop_requires=ip#0 fs#0(down,stdby down)

Description:

A whitespace-separated list of conditions to meet to accept a ‘stop’ action.

A condition is expressed as <rid>(<state>,...).

If states are omitted, up,stdby up is used as the default expected states.

Keyword subset

required:    false
scopable:    true
rbac:        This driver group requires the root grant.

Description:

The name of the subset this resource is assigned to.

Resources of a same driver group and a same subset are ordered and acted upon together, and are configured as a whole in a [subset#<group>:<name>] section, or in a less precise [subset#<name>] one.

That section accepts parallel, to act on the members concurrently rather than one after the other, and the pg_* keywords, to place the members in their own process group.

Keyword swap_roles

required:    false
scopable:    true
default:     false
convert:     bool
rbac:        This driver group requires the root grant.

Description:

Swap the natural replication direction after stopping the replication on migrate.

Keyword tags

required:    false
scopable:    true
convert:     set
rbac:        This driver group requires the root grant.

Description:

A whitespace-separated list of tags.

Tags can be used for resource selection by tag.

Some tags can influence the driver behaviour:

• noaction

  Skip any state changing action on the resource and imply optional=true.

• nostatus

  Force the status n/a.

Keyword timeout

required:    false
scopable:    true
default:     10s
convert:     duration
rbac:        This driver group requires the root grant.

Example:

timeout=10s

Description:

Maximum duration to wait for operations to complete.

Keyword type

required:    false
scopable:    false
rbac:        This driver group requires the root grant.

Description:

The resource driver name.

Keyword unprovision

required:    false
scopable:    false
default:     true
convert:     bool
rbac:        This driver group requires the root grant.

Description:

Set to false to ignore the unprovision action on the resource.

Warning: unprovision use data-destructive operations like formatting.

It is recommended to set provision=false on long-lived critical objects, to force administrators to remove this setting when they really want to destroy data.

Keyword unprovision_requires

required:    false
scopable:    false
rbac:        This driver group requires the root grant.

Example:

unprovision_requires=ip#0 fs#0(down,stdby down)

Description:

A whitespace-separated list of conditions to meet to accept a ‘unprovision’ action.

A condition is expressed as <rid>(<state>,...).

If states are omitted, up,stdby up is used as the default expected states.

Keyword update_requires

required:    false
scopable:    false
aliases:     sync_requires, sync_update_requires, sync_nodes_requires, sync_drp_requires
rbac:        This driver group requires the root grant.

Example:

update_requires=ip#0 fs#0(down,stdby down)

Description:

A whitespace-separated list of conditions to meet to accept an ‘update’ or a ‘full’ action of a sync resource. A scheduled ‘update’ is not scheduled while they are not met.

A condition is expressed as <rid>(<state>,...).

If states are omitted, up,stdby up is used as the default expected states.