garage/doc/book/reference-manual/monitoring.md

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For information on setting up monitoring, see our dedicated page in the Cookbook section.

List of exported metrics

Garage system metrics

garage_build_info (counter)

Exposes the Garage version number running on a node.

garage_build_info{version="1.0"} 1

garage_replication_factor (counter)

Exposes the Garage replication factor configured on the node

garage_replication_factor 3

Metrics of the API endpoints

api_admin_request_counter (counter)

Counts the number of requests to a given endpoint of the administration API. Example:

api_admin_request_counter{api_endpoint="Metrics"} 127041

api_admin_request_duration (histogram)

Evaluates the duration of API calls to the various administration API endpoint. Example:

api_admin_request_duration_bucket{api_endpoint="Metrics",le="0.5"} 127041
api_admin_request_duration_sum{api_endpoint="Metrics"} 605.250344830999
api_admin_request_duration_count{api_endpoint="Metrics"} 127041

api_s3_request_counter (counter)

Counts the number of requests to a given endpoint of the S3 API. Example:

api_s3_request_counter{api_endpoint="CreateMultipartUpload"} 1

api_s3_error_counter (counter)

Counts the number of requests to a given endpoint of the S3 API that returned an error. Example:

api_s3_error_counter{api_endpoint="GetObject",status_code="404"} 39

api_s3_request_duration (histogram)

Evaluates the duration of API calls to the various S3 API endpoints. Example:

api_s3_request_duration_bucket{api_endpoint="CreateMultipartUpload",le="0.5"} 1
api_s3_request_duration_sum{api_endpoint="CreateMultipartUpload"} 0.046340762
api_s3_request_duration_count{api_endpoint="CreateMultipartUpload"} 1

api_k2v_request_counter (counter), api_k2v_error_counter (counter), api_k2v_error_duration (histogram)

Same as for S3, for the K2V API.

Metrics of the Web endpoint

web_request_counter (counter)

Number of requests to the web endpoint

web_request_counter{method="GET"} 80

web_request_duration (histogram)

Duration of requests to the web endpoint

web_request_duration_bucket{method="GET",le="0.5"} 80
web_request_duration_sum{method="GET"} 1.0528433229999998
web_request_duration_count{method="GET"} 80

web_error_counter (counter)

Number of requests to the web endpoint resulting in errors

web_error_counter{method="GET",status_code="404 Not Found"} 64

Metrics of the data block manager

block_bytes_read, block_bytes_written (counter)

Number of bytes read/written to/from disk in the data storage directory.

block_bytes_read 120586322022
block_bytes_written 3386618077

block_compression_level (counter)

Exposes the block compression level configured for the Garage node.

block_compression_level 3

block_read_duration, block_write_duration (histograms)

Evaluates the duration of the reading/writing of individual data blocks in the data storage directory.

block_read_duration_bucket{le="0.5"} 169229
block_read_duration_sum 2761.6902550310056
block_read_duration_count 169240
block_write_duration_bucket{le="0.5"} 3559
block_write_duration_sum 195.59170078500006
block_write_duration_count 3571

block_delete_counter (counter)

Counts the number of data blocks that have been deleted from storage.

block_delete_counter 122

block_resync_counter (counter), block_resync_duration (histogram)

Counts the number of resync operations the node has executed, and evaluates their duration.

block_resync_counter 308897
block_resync_duration_bucket{le="0.5"} 308892
block_resync_duration_sum 139.64204196100016
block_resync_duration_count 308897

block_resync_queue_length (gauge)

The number of block hashes currently queued for a resync. This is normal to be nonzero for long periods of time.

block_resync_queue_length 0

block_resync_errored_blocks (gauge)

The number of block hashes that we were unable to resync last time we tried. THIS SHOULD BE ZERO, OR FALL BACK TO ZERO RAPIDLY, IN A HEALTHY CLUSTER. Persistent nonzero values indicate that some data is likely to be lost.

block_resync_errored_blocks 0

rpc_netapp_request_counter (counter)

Number of RPC requests emitted

rpc_request_counter{from="<this node>",rpc_endpoint="garage_block/manager.rs/Rpc",to="<remote node>"} 176

rpc_netapp_error_counter (counter)

Number of communication errors (errors in the Netapp library, generally due to disconnected nodes)

rpc_netapp_error_counter{from="<this node>",rpc_endpoint="garage_block/manager.rs/Rpc",to="<remote node>"} 354

rpc_timeout_counter (counter)

Number of RPC timeouts, should be close to zero in a healthy cluster.

rpc_timeout_counter{from="<this node>",rpc_endpoint="garage_rpc/membership.rs/SystemRpc",to="<remote node>"} 1

rpc_duration (histogram)

The duration of internal RPC calls between Garage nodes.

rpc_duration_bucket{from="<this node>",rpc_endpoint="garage_block/manager.rs/Rpc",to="<remote node>",le="0.5"} 166
rpc_duration_sum{from="<this node>",rpc_endpoint="garage_block/manager.rs/Rpc",to="<remote node>"} 35.172253716
rpc_duration_count{from="<this node>",rpc_endpoint="garage_block/manager.rs/Rpc",to="<remote node>"} 174

Metrics of the metadata table manager

table_gc_todo_queue_length (gauge)

Table garbage collector TODO queue length

table_gc_todo_queue_length{table_name="block_ref"} 0

table_get_request_counter (counter), table_get_request_duration (histogram)

Number of get/get_range requests internally made on each table, and their duration.

table_get_request_counter{table_name="bucket_alias"} 315
table_get_request_duration_bucket{table_name="bucket_alias",le="0.5"} 315
table_get_request_duration_sum{table_name="bucket_alias"} 0.048509778000000024
table_get_request_duration_count{table_name="bucket_alias"} 315

table_put_request_counter (counter), table_put_request_duration (histogram)

Number of insert/insert_many requests internally made on this table, and their duration

table_put_request_counter{table_name="block_ref"} 677
table_put_request_duration_bucket{table_name="block_ref",le="0.5"} 677
table_put_request_duration_sum{table_name="block_ref"} 61.617528636
table_put_request_duration_count{table_name="block_ref"} 677

table_internal_delete_counter (counter)

Number of value deletions in the tree (due to GC or repartitioning)

table_internal_delete_counter{table_name="block_ref"} 2296

table_internal_update_counter (counter)

Number of value updates where the value actually changes (includes creation of new key and update of existing key)

table_internal_update_counter{table_name="block_ref"} 5996

table_merkle_updater_todo_queue_length (gauge)

Merkle tree updater TODO queue length (should fall to zero rapidly)

table_merkle_updater_todo_queue_length{table_name="block_ref"} 0

table_sync_items_received, table_sync_items_sent (counters)

Number of data items sent to/recieved from other nodes during resync procedures

table_sync_items_received{from="<remote node>",table_name="bucket_v2"} 3
table_sync_items_sent{table_name="block_ref",to="<remote node>"} 2