linuxutil
Gathers TCP/UDP statistics and network interface statistics from the netstats and ethtool Node utilities (respectively).
Architecture
The plugin uses the following utilities as data sources:
netstat- TCP Socket information
- UDP Socket information
- "/proc/net/netstat" for IP and UDP statistics
ethtool- Interface statistics
Code Locations
- Plugin code interfacing with the Node utilities: pkg/plugin/linuxutil/
Metrics
See metrics for Basic Mode (Advanced modes have identical metrics).
Configuration (in Code)
Both ethtool and netstat data can be curated to remove unwanted data. Below options in a struct in linuxutil.go can be used to configure the same.
type EthtoolOpts struct {
// when true will only include keys with err or drop in its name
errOrDropKeysOnly bool
// when true will include all keys with value 0
addZeroVal bool
}
type NetstatOpts struct {
// when true only includes curated list of keys
CuratedKeys bool
// when true will include all keys with value 0
AddZeroVal bool
// get only listening sockets
ListenSock bool
}
These are initialized in the linuxutil.go file.
Label Values for tcp_connection_stats
Below is a running list of all statistics for the metric tcp_connection_stats, captured from the netstats utility:
DelayedACKLockedDelayedACKLostDelayedACKsIPReversePathFilterPAWSEstabTCPACKSkippedPAWSTCPACKSkippedSeqTCPAbortOnCloseTCPAbortOnDataTCPAckCompressedTCPAutoCorkingTCPBacklogCoalesceTCPChallengeACKTCPDSACKIgnoredNoUndoTCPDSACKOldSentTCPDSACKRecvTCPDSACKRecvSegsTCPDSACKUndoTCPDeliveredTCPFastRetransTCPFromZeroWindowAdvTCPFullUndoTCPHPAcksTCPHPHitsTCPHystartTrainCwndTCPHystartTrainDetectTCPKeepAliveTCPLossProbeRecoveryTCPLossProbesTCPLossUndoTCPOFOQueueTCPOrigDataSentTCPPartialUndoTCPPureAcksTCPRcvCoalesceTCPSACKReorderTCPSackMergedTCPSackRecoveryTCPSackShiftFallbackTCPSackShiftedTCPSpuriousRtxHostQueuesTCPSynRetransTCPTSReorderTCPTimeoutsTCPToZeroWindowAdvTCPWantZeroWindowAdvTWTWRecycledTcpDuplicateDataRehashTcpTimeoutRehash