mountstats/linux: fix multiple transports statistics labeling (#3358)

When mounting nfs with nconnect, mountstats will show multiple transports.
Currently the mountstats exporter fails to create metrics from this information
due to repeated entries.

Fix this by adding transport metrics a "transport" label enumerating their
order in the mountstats output.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>

Author: sagigrimberg

collector/fixtures/e2e-64k-page-output.txt

@@ -2267,44 +2267,44 @@ node_mountstats_nfs_total_write_bytes_total{export="192.168.1.1:/srv/test",mount
 node_mountstats_nfs_total_write_bytes_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
 # HELP node_mountstats_nfs_transport_backlog_queue_total Total number of items added to the RPC backlog queue.
 # TYPE node_mountstats_nfs_transport_backlog_queue_total counter
-node_mountstats_nfs_transport_backlog_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 0
-node_mountstats_nfs_transport_backlog_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_backlog_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 0
+node_mountstats_nfs_transport_backlog_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_bad_transaction_ids_total Number of times the NFS server sent a response with a transaction ID unknown to this client.
 # TYPE node_mountstats_nfs_transport_bad_transaction_ids_total counter
-node_mountstats_nfs_transport_bad_transaction_ids_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 0
-node_mountstats_nfs_transport_bad_transaction_ids_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_bad_transaction_ids_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 0
+node_mountstats_nfs_transport_bad_transaction_ids_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_bind_total Number of times the client has had to establish a connection from scratch to the NFS server.
 # TYPE node_mountstats_nfs_transport_bind_total counter
-node_mountstats_nfs_transport_bind_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 0
-node_mountstats_nfs_transport_bind_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_bind_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 0
+node_mountstats_nfs_transport_bind_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_connect_total Number of times the client has made a TCP connection to the NFS server.
 # TYPE node_mountstats_nfs_transport_connect_total counter
-node_mountstats_nfs_transport_connect_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 1
-node_mountstats_nfs_transport_connect_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_connect_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 1
+node_mountstats_nfs_transport_connect_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_idle_time_seconds Duration since the NFS mount last saw any RPC traffic, in seconds.
 # TYPE node_mountstats_nfs_transport_idle_time_seconds gauge
-node_mountstats_nfs_transport_idle_time_seconds{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 11
-node_mountstats_nfs_transport_idle_time_seconds{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_idle_time_seconds{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 11
+node_mountstats_nfs_transport_idle_time_seconds{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_maximum_rpc_slots Maximum number of simultaneously active RPC requests ever used.
 # TYPE node_mountstats_nfs_transport_maximum_rpc_slots gauge
-node_mountstats_nfs_transport_maximum_rpc_slots{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 24
-node_mountstats_nfs_transport_maximum_rpc_slots{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 24
+node_mountstats_nfs_transport_maximum_rpc_slots{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 24
+node_mountstats_nfs_transport_maximum_rpc_slots{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 24
 # HELP node_mountstats_nfs_transport_pending_queue_total Total number of items added to the RPC transmission pending queue.
 # TYPE node_mountstats_nfs_transport_pending_queue_total counter
-node_mountstats_nfs_transport_pending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 5726
-node_mountstats_nfs_transport_pending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 5726
+node_mountstats_nfs_transport_pending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 5726
+node_mountstats_nfs_transport_pending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 5726
 # HELP node_mountstats_nfs_transport_receives_total Number of RPC responses for this mount received from the NFS server.
 # TYPE node_mountstats_nfs_transport_receives_total counter
-node_mountstats_nfs_transport_receives_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 6428
-node_mountstats_nfs_transport_receives_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 6428
+node_mountstats_nfs_transport_receives_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 6428
+node_mountstats_nfs_transport_receives_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 6428
 # HELP node_mountstats_nfs_transport_sending_queue_total Total number of items added to the RPC transmission sending queue.
 # TYPE node_mountstats_nfs_transport_sending_queue_total counter
-node_mountstats_nfs_transport_sending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 26
-node_mountstats_nfs_transport_sending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 26
+node_mountstats_nfs_transport_sending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 26
+node_mountstats_nfs_transport_sending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 26
 # HELP node_mountstats_nfs_transport_sends_total Number of RPC requests for this mount sent to the NFS server.
 # TYPE node_mountstats_nfs_transport_sends_total counter
-node_mountstats_nfs_transport_sends_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 6428
-node_mountstats_nfs_transport_sends_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 6428
+node_mountstats_nfs_transport_sends_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 6428
+node_mountstats_nfs_transport_sends_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 6428
 # HELP node_mountstats_nfs_write_bytes_total Number of bytes written using the write() syscall.
 # TYPE node_mountstats_nfs_write_bytes_total counter
 node_mountstats_nfs_write_bytes_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 0

collector/fixtures/e2e-output.txt

@@ -2299,44 +2299,44 @@ node_mountstats_nfs_total_write_bytes_total{export="192.168.1.1:/srv/test",mount
 node_mountstats_nfs_total_write_bytes_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
 # HELP node_mountstats_nfs_transport_backlog_queue_total Total number of items added to the RPC backlog queue.
 # TYPE node_mountstats_nfs_transport_backlog_queue_total counter
-node_mountstats_nfs_transport_backlog_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 0
-node_mountstats_nfs_transport_backlog_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_backlog_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 0
+node_mountstats_nfs_transport_backlog_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_bad_transaction_ids_total Number of times the NFS server sent a response with a transaction ID unknown to this client.
 # TYPE node_mountstats_nfs_transport_bad_transaction_ids_total counter
-node_mountstats_nfs_transport_bad_transaction_ids_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 0
-node_mountstats_nfs_transport_bad_transaction_ids_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_bad_transaction_ids_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 0
+node_mountstats_nfs_transport_bad_transaction_ids_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_bind_total Number of times the client has had to establish a connection from scratch to the NFS server.
 # TYPE node_mountstats_nfs_transport_bind_total counter
-node_mountstats_nfs_transport_bind_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 0
-node_mountstats_nfs_transport_bind_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_bind_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 0
+node_mountstats_nfs_transport_bind_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_connect_total Number of times the client has made a TCP connection to the NFS server.
 # TYPE node_mountstats_nfs_transport_connect_total counter
-node_mountstats_nfs_transport_connect_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 1
-node_mountstats_nfs_transport_connect_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_connect_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 1
+node_mountstats_nfs_transport_connect_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_idle_time_seconds Duration since the NFS mount last saw any RPC traffic, in seconds.
 # TYPE node_mountstats_nfs_transport_idle_time_seconds gauge
-node_mountstats_nfs_transport_idle_time_seconds{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 11
-node_mountstats_nfs_transport_idle_time_seconds{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 0
+node_mountstats_nfs_transport_idle_time_seconds{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 11
+node_mountstats_nfs_transport_idle_time_seconds{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 0
 # HELP node_mountstats_nfs_transport_maximum_rpc_slots Maximum number of simultaneously active RPC requests ever used.
 # TYPE node_mountstats_nfs_transport_maximum_rpc_slots gauge
-node_mountstats_nfs_transport_maximum_rpc_slots{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 24
-node_mountstats_nfs_transport_maximum_rpc_slots{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 24
+node_mountstats_nfs_transport_maximum_rpc_slots{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 24
+node_mountstats_nfs_transport_maximum_rpc_slots{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 24
 # HELP node_mountstats_nfs_transport_pending_queue_total Total number of items added to the RPC transmission pending queue.
 # TYPE node_mountstats_nfs_transport_pending_queue_total counter
-node_mountstats_nfs_transport_pending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 5726
-node_mountstats_nfs_transport_pending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 5726
+node_mountstats_nfs_transport_pending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 5726
+node_mountstats_nfs_transport_pending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 5726
 # HELP node_mountstats_nfs_transport_receives_total Number of RPC responses for this mount received from the NFS server.
 # TYPE node_mountstats_nfs_transport_receives_total counter
-node_mountstats_nfs_transport_receives_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 6428
-node_mountstats_nfs_transport_receives_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 6428
+node_mountstats_nfs_transport_receives_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 6428
+node_mountstats_nfs_transport_receives_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 6428
 # HELP node_mountstats_nfs_transport_sending_queue_total Total number of items added to the RPC transmission sending queue.
 # TYPE node_mountstats_nfs_transport_sending_queue_total counter
-node_mountstats_nfs_transport_sending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 26
-node_mountstats_nfs_transport_sending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 26
+node_mountstats_nfs_transport_sending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 26
+node_mountstats_nfs_transport_sending_queue_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 26
 # HELP node_mountstats_nfs_transport_sends_total Number of RPC requests for this mount sent to the NFS server.
 # TYPE node_mountstats_nfs_transport_sends_total counter
-node_mountstats_nfs_transport_sends_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 6428
-node_mountstats_nfs_transport_sends_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp"} 6428
+node_mountstats_nfs_transport_sends_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp",transport="0"} 6428
+node_mountstats_nfs_transport_sends_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="udp",transport="0"} 6428
 # HELP node_mountstats_nfs_write_bytes_total Number of bytes written using the write() syscall.
 # TYPE node_mountstats_nfs_write_bytes_total counter
 node_mountstats_nfs_write_bytes_total{export="192.168.1.1:/srv/test",mountaddr="192.168.1.1",protocol="tcp"} 0