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19.6. Obtaining Node Information
A Red Hat Gluster Storage trusted storage pool consists of nodes, volumes, and bricks. The
get-state command outputs information about a node to a specified file.
Using the command line interface, external applications can invoke the command on all nodes of the trusted storage pool, and parse and collate the data obtained from all these nodes to get an easy-to-use and complete picture of the state of the trusted storage pool in a machine parseable format.
Executing the get-state Command
The get-state command outputs information about a node to a specified file and can be invoked in different ways. The table below shows the options that can be used with the get-state command.
# gluster get-state [odir path_to_output_dir] [file filename]
Usage: get-state [options]
| Command | Description |
|---|---|
gluster get-state | glusterd state information is saved in the /var/run/gluster/glusterd_state_time file appended with the time. |
gluster get-state file | glusterd state information is saved in the /var/run/gluster/ directory and in the file name as specified in the command. |
gluster get-state odir | glusterd state information is saved in the directory and in the file name as specified in the command. |
Interpreting the Output with Examples
Each invocation of the get-state command, it saves the information that reflect the node level status of the trusted storage pool as maintained in glusterd (no other daemons are supported as of now) to a file specified in the command. By default, the output will be dumped to /var/run/gluster/glusterd_state_timestamp file .
Each invocation of the get-state command provides the following information:
| Section | Description |
|---|---|
| Global | Displays the UUID and the op-version of the glusterd. |
| Global options | Displays cluster specific options that have been set explicitly through the volume set command. |
| Peers | Displays the peer node information including its hostname and connection status. |
| Volumes | Displays the list of volumes created on this node along with the detailed information on each volume. |
| Services | Displays the list of the services configured on this node along with its status. |
| Misc | Displays miscellaneous information about the node. For example, configured ports. |
Example Output:
# gluster get-state
glusterd state dumped to /var/run/gluster/glusterd_state_20160921_123605
[Global]
MYUUID: 1e20ed87-c22a-4612-ab04-90765bccaea5
op-version: 40000
[Global options]
cluster.server-quorum-ratio: 60
[Peers]
Peer1.primary_hostname: 192.168.122.31
Peer1.uuid: dfc7ff96-b61d-4c88-a3ad-b6852f72c5f0
Peer1.state: Peer in Cluster
Peer1.connected: Connected
Peer1.othernames:
Peer2.primary_hostname: 192.168.122.65
Peer2.uuid: dd83409e-22fa-4186-935a-648a1927cc9d
Peer2.state: Peer in Cluster
Peer2.connected: Connected
Peer2.othernames:
[Volumes]
Volume1.name: tv1
Volume1.id: cf89d345-8cde-4c53-be85-1f3f20e7e410
Volume1.type: Distribute
Volume1.transport_type: tcp
Volume1.status: Started
Volume1.brickcount: 3
Volume1.Brick1.path: 192.168.122.200:/root/bricks/tb11
Volume1.Brick1.hostname: 192.168.122.200
Volume1.Brick1.port: 49152
Volume1.Brick1.rdma_port: 0
Volume1.Brick1.status: Started
Volume1.Brick1.signedin: True
Volume1.Brick2.path: 192.168.122.65:/root/bricks/tb12
Volume1.Brick2.hostname: 192.168.122.65
Volume1.Brick3.path: 192.168.122.31:/root/bricks/tb13
Volume1.Brick3.hostname: 192.168.122.31
Volume1.snap_count: 0
Volume1.stripe_count: 1
Volume1.replica_count: 1
Volume1.subvol_count: 3
Volume1.arbiter_count: 0
Volume1.disperse_count: 0
Volume1.redundancy_count: 0
Volume1.quorum_status: not_applicable
Volume1.snapd_svc.online_status: Online
Volume1.snapd_svc.inited: True
Volume1.rebalance.id: 00000000-0000-0000-0000-000000000000
Volume1.rebalance.status: not_started
Volume1.rebalance.failures: 0
Volume1.rebalance.skipped: 0
Volume1.rebalance.lookedup: 0
Volume1.rebalance.files: 0
Volume1.rebalance.data: 0Bytes
[Volume1.options]
features.uss: on
transport.address-family: inet
performance.readdir-ahead: on
nfs.disable: on
Volume2.name: tv2
Volume2.id: 700fd588-6fc2-46d5-9435-39c434656fe2
Volume2.type: Distribute
Volume2.transport_type: tcp
Volume2.status: Created
Volume2.brickcount: 3
Volume2.Brick1.path: 192.168.122.200:/root/bricks/tb21
Volume2.Brick1.hostname: 192.168.122.200
Volume2.Brick1.port: 0
Volume2.Brick1.rdma_port: 0
Volume2.Brick1.status: Stopped
Volume2.Brick1.signedin: False
Volume2.Brick2.path: 192.168.122.65:/root/bricks/tb22
Volume2.Brick2.hostname: 192.168.122.65
Volume2.Brick3.path: 192.168.122.31:/root/bricks/tb23
Volume2.Brick3.hostname: 192.168.122.31
Volume2.snap_count: 0
Volume2.stripe_count: 1
Volume2.replica_count: 1
Volume2.subvol_count: 3
Volume2.arbiter_count: 0
Volume2.disperse_count: 0
Volume2.redundancy_count: 0
Volume2.quorum_status: not_applicable
Volume2.snapd_svc.online_status: Offline
Volume2.snapd_svc.inited: False
Volume2.rebalance.id: 00000000-0000-0000-0000-000000000000
Volume2.rebalance.status: not_started
Volume2.rebalance.failures: 0
Volume2.rebalance.skipped: 0
Volume2.rebalance.lookedup: 0
Volume2.rebalance.files: 0
Volume2.rebalance.data: 0Bytes
[Volume2.options]
transport.address-family: inet
performance.readdir-ahead: on
nfs.disable: on
Volume3.name: tv3
Volume3.id: 97b94d77-116a-4595-acfc-9676e4ebcbd2
Volume3.type: Tier
Volume3.transport_type: tcp
Volume3.status: Stopped
Volume3.brickcount: 4
Volume3.Brick1.path: 192.168.122.31:/root/bricks/tb34
Volume3.Brick1.hostname: 192.168.122.31
Volume3.Brick2.path: 192.168.122.65:/root/bricks/tb33
Volume3.Brick2.hostname: 192.168.122.65
Volume3.Brick3.path: 192.168.122.200:/root/bricks/tb31
Volume3.Brick3.hostname: 192.168.122.200
Volume3.Brick3.port: 49154
Volume3.Brick3.rdma_port: 0
Volume3.Brick3.status: Stopped
Volume3.Brick3.signedin: False
Volume3.Brick3.tier: Cold
Volume3.Brick4.path: 192.168.122.65:/root/bricks/tb32
Volume3.Brick4.hostname: 192.168.122.65
Volume3.snap_count: 0
Volume3.stripe_count: 1
Volume3.replica_count: 2
Volume3.subvol_count: 2
Volume3.arbiter_count: 0
Volume3.disperse_count: 0
Volume3.redundancy_count: 0
Volume3.quorum_status: not_applicable
Volume3.snapd_svc.online_status: Offline
Volume3.snapd_svc.inited: True
Volume3.rebalance.id: 00000000-0000-0000-0000-000000000000
Volume3.rebalance.status: not_started
Volume3.rebalance.failures: 0
Volume3.rebalance.skipped: 0
Volume3.rebalance.lookedup: 0
Volume3.rebalance.files: 0
Volume3.rebalance.data: 0Bytes
Volume3.tier_info.cold_tier_type: Replicate
Volume3.tier_info.cold_brick_count: 2
Volume3.tier_info.cold_replica_count: 2
Volume3.tier_info.cold_disperse_count: 0
Volume3.tier_info.cold_dist_leaf_count: 2
Volume3.tier_info.cold_redundancy_count: 0
Volume3.tier_info.hot_tier_type: Replicate
Volume3.tier_info.hot_brick_count: 2
Volume3.tier_info.hot_replica_count: 2
Volume3.tier_info.promoted: 0
Volume3.tier_info.demoted: 0
[Volume3.options]
cluster.tier-mode: cache
features.ctr-enabled: on
transport.address-family: inet
performance.readdir-ahead: on
nfs.disable: on
Volume4.name: tv4
Volume4.id: ad7260ac-0d5c-461f-a39c-a0f4a4ff854b
Volume4.type: Distribute
Volume4.transport_type: tcp
Volume4.status: Started
Volume4.brickcount: 2
Volume4.Brick1.path: 192.168.122.31:/root/bricks/tb41
Volume4.Brick1.hostname: 192.168.122.31
Volume4.Brick2.path: 192.168.122.31:/root/bricks/tb42
Volume4.Brick2.hostname: 192.168.122.31
Volume4.snapshot1.name: tv4-snap_GMT-2016.11.24-12.10.15
Volume4.snapshot1.id: 2eea76ae-c99f-4128-b5c0-3233048312f2
Volume4.snapshot1.time: 2016-11-24 12:10:15
Volume4.snapshot1.status: in_use
Volume4.snap_count: 1
Volume4.stripe_count: 1
Volume4.subvol_count: 2
Volume4.arbiter_count: 0
Volume4.disperse_count: 0
Volume4.redundancy_count: 0
Volume4.quorum_status: not_applicable
Volume4.snapd_svc.online_status: Offline
Volume4.snapd_svc.inited: True
Volume4.rebalance.id: 00000000-0000-0000-0000-000000000000
Volume4.rebalance.status: not_started
Volume4.rebalance.failures: 0
Volume4.rebalance.skipped: 0
Volume4.rebalance.lookedup: 0
Volume4.rebalance.files: 0
Volume4.rebalance.data: 0
Volume4.rebalance.data: 0
[Volume4.options]
features.uss: on
transport.address-family: inet
performance.readdir-ahead: on
nfs.disable: on
[Services]
svc1.name: glustershd
svc1.online_status: Offline
svc2.name: nfs
svc2.online_status: Offline
svc3.name: bitd
svc3.online_status: Offline
svc4.name: scrub
svc4.online_status: Offline
svc5.name: quotad
svc5.online_status: Offline
[Misc]
Base port: 49152
Last allocated port: 49154
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