Statistics in collectd consist of a value list. A value list includes:
| Value list | Example | comment | |||||
|---|---|---|---|---|---|---|---|
| Values | 99.8999 | percentage | |||||
| Value length | the number of values in the data set. | ||||||
| Time | timestamp at which the value was collected. | 1475837857 | epoch | ||||
| Interval | interval at which to expect a new value. | 10 | interval | ||||
| Host | used to identify the host. | localhost | can be uuid for vm or host… or can give host a name | ||||
| Plugin | used to identify the plugin. | cpu | |||||
| Plugin instance (optional) | used to group a set of values together. For e.g. values belonging to a DPDK interface. | 0 | |||||
| Type | unit used to measure a value. In other words used to refer to a data set. | percent | |||||
| Type instance (optional) | used to distinguish between values that have an identical type. | user | |||||
| meta data | an opaque data structure that enables the passing of additional information about a value list. “Meta data in the global cache can be used to store arbitrary information about an identifier” | ||||||
Notifications:
Notifications in collectd are generic messages containing:
| An associated severity, which can be one of OKAY, WARNING, and FAILURE. | ||||||
| A time. | ||||||
| A Message | ||||||
| A host. | ||||||
| A plugin. | ||||||
| A plugin instance (optional). | ||||||
| A type. | ||||||
| A types instance (optional). | ||||||
| Meta-data. |
Example notification:
| Severity:FAILURE |
| Time:1472552207.385 |
| Host:pod3-node1 |
| Plugin:dpdkevents |
| PluginInstance:dpdk0 |
| Type:gauge |
| TypeInstance:link_status |
| DataSource:value |
| CurrentValue:1.000000e+00 |
| WarningMin:nan |
| WarningMax:nan |
| FailureMin:2.000000e+00 |
| FailureMax:nan |
| Hostpod3-node1, plugin dpdkevents (instance dpdk0) type gauge (instance link_status): Data source "value" is currently 1.000000. That is below the failure threshold of 2.000000. |
Supported Metrics and Events
Full list can be found here: https://github.com/collectd/collectd/blob/master/src/types.db
| Where collectd is running | Plugin | Type | Type Instance | comment |
|---|---|---|---|---|
| Host/guest | CPU | percent | idle | can be per cpu/aggregate |
| percent | nice | |||
| percent | interrupt | |||
| percent | softirq | |||
| percent | steal | |||
| percent | system | |||
| percent | user | |||
| percent | wait | |||
| Interface | if_dropped | in | ||
| if_errors | in | |||
| if_octets | in | |||
| if_packets | in | |||
| if_dropped | out | |||
| if_errors | out | |||
| if_octets | out | |||
| if_packets | out | |||
| Memory | memory | buffered | ||
| memory | cached | |||
| memory | free | |||
| memory | slab_recl | |||
| memory | slab_unrecl | |||
| memory | used | |||
| disk | disk_io_time | io_time | ||
| disk_io_time | weighted_io_time | |||
| disk_merged | read | |||
| disk_merged | write | |||
| disk_octects | read | |||
| disk_octects | write | |||
| disk_ops | read | |||
| disk_ops | write | |||
| disk_time | read | |||
| disk_time | write | |||
| pending_operations | ||||
| Ping | ping | Latency | ||
| ping_droprate | droprate | |||
| ping_stddev | standard deviation | |||
| load | load | shortterm | ||
| load | midterm | |||
| load | longterm | |||
| OVS events | gauge | link_status | ||
| OVS Stats | collisions | per interface | ||
| rx_bytes | ||||
| rx_crc_err | ||||
| rx_dropped | ||||
| rx_errors | ||||
| rx_frame_err | ||||
| rx_over_err | ||||
| rx_packets | ||||
| tx_bytes | ||||
| tx_dropped | ||||
| tx_errors | ||||
| tx_packets | ||||
| Hugepages | bytes | used | total/pernode/both | |
| bytes | free | |||
| vmpage_number | used | |||
| vmpage_number | free | |||
| percent | used | |||
| percent | free | |||
| processes | fork_rate | |||
| ps_state | blocked | |||
| ps_state | paging | |||
| ps_state | running | |||
| ps_state | sleeping | |||
| ps_state | stopped | |||
| ps_state | zombies | |||
| Host only | Libvirt | disk_octets | read | |
| disk_octets | write | |||
| disk_ops | read | |||
| disk_ops | write | |||
| if_dropped | in | |||
| if_dropped | out | |||
| if_errors | in | |||
| if_errors | out | |||
| if_octets | in | |||
| if_octets | out | |||
| if_packets | in | |||
| if_packets | out | |||
| memory | actual | |||
| memory | balloon | |||
| memory | rss | |||
| memory | swap_in | |||
| memory | total | |||
| virt_cpu_total | This is in jiffies! | |||
| virt_vcpu | This is in jiffies! | |||
| RDT | ipc | per core group | ||
| memory_bandwidth | local | |||
| memory_bandwidth | remote | |||
| bytes | llc | |||
dpdkstats compatible with DPDK 16.04 (based on ixgbe, vhost support will be enabled in DPDK 16.11, patch support being upgraded to DPDK 16.07 in progress) | derive | rx_l3_l4_xsum_error | ||
| errors | flow_director_filter_add_errors | |||
| flow_director_filter_remove_errors | ||||
| mac_local_errors | ||||
| mac_remote_errors | ||||
| if_rx_dropped | rx_fcoe_dropped | |||
| rx_mac_short_packet_dropped | ||||
| rx_management_dropped | ||||
| rx_priorityX_dropped | where X is 0 to 7 | |||
| if_rx_errors | rx_crc_errors | |||
| rx_errors | ||||
| rx_fcoe_crc_errors | ||||
| rx_fcoe_mbuf_allocation_errors | ||||
| rx_fcoe_no_direct_data_placement | ||||
| rx_fcoe_no_direct_data_placement_ext_buff | ||||
| rx_fragment_errors | ||||
| rx_illegal_byte_errors | ||||
| rx_jabber_errors | ||||
| rx_length_errors | ||||
| rx_mbuf_allocation_errors | ||||
| rx_oversize_errors | ||||
| rx_priorityX_mbuf_allocation_errors | where X is 0 to 7 | |||
| rx_q0_errors | if more queues are allocated then you get the errors per Queue | |||
| rx_undersize_errors | ||||
| if_rx_octets | rx_error_bytes | bug - will move this to errors | ||
| rx_fcoe_bytes | ||||
| rx_fcoe_bytes | ||||
| rx_good_bytes | ||||
| rx_q0_bytes | per queue | |||
| rx_total_bytes | ||||
| if_rx_packets | rx_broadcast_packets | |||
| rx_fcoe_packets | ||||
| rx_flow_control_xoff_packets | ||||
| rx_flow_control_xon_packets | ||||
| rx_good_packets | ||||
| rx_management_packets | ||||
| rx_multicast_packets | ||||
| rx_priorityX_xoff_packets | where X is 0 to 7 | |||
| rx_priorityX_xon_packets | where X is 0 to 7 | |||
| rx_q0_packets | per queue | |||
| rx_size_1024_to_max_packets | ||||
| rx_size_128_to_255_packets | ||||
| rx_size_256_to_511_packets | ||||
| rx_size_512_to_1023_packets | ||||
| rx_size_64_packets | ||||
| rx_size_65_to_127_packets | ||||
| rx_total_missed_packets | ||||
| rx_total_packets | ||||
| rx_xoff_packets | ||||
| rx_xon_packets | ||||
| if_tx_errors | tx_errors | |||
| if_tx_octets | tx_fcoe_bytes | |||
| tx_good_bytes | ||||
| tx_q0_bytes | per queue | |||
| if_tx_packets | tx_broadcast_packets | |||
| tx_fcoe_packets | ||||
| tx_flow_control_xoff_packets | ||||
| tx_flow_control_xon_packets | ||||
| tx_good_packets | ||||
| tx_management_packets | ||||
| tx_multicast_packets | ||||
| tx_priorityX_xoff_packets | where X is 0 to 7 | |||
| tx_priorityX_xon_packets | where X is 0 to 7 | |||
| tx_q0_packets | per queue | |||
| tx_size_1024_to_max_packets | ||||
| tx_size_128_to_255_packets | ||||
| tx_size_256_to_511_packets | ||||
| tx_size_512_to_1023_packets | ||||
| tx_size_64_packets | ||||
| tx_size_65_to_127_packets | ||||
| tx_total_packets | ||||
| tx_xoff_packets | ||||
| tx_xon_packets | ||||
| operations | flow_director_added_filters | |||
| flow_director_matched_filters | ||||
| flow_director_missed_filters | ||||
| flow_director_removed_filters |