corosync-qdevice-tool (8) - Linux Manuals

corosync-qdevice-tool: corosync-qdevice control interface.


corosync-qdevice-tool - corosync-qdevice control interface.


corosync-qdevice-tool [-Hhsv] [-p qdevice_ipc_socket_path]


corosync-qdevice-tool is a frontend to the internal corosync-qdevice IPC. Its main purpose is to show important information about the current internal state of corosync-qdevice.


Properly shutdown the corosync-qdevice process
Display a short usage text
Display the status of the corosync-qdevice process. The output is described in its own section below.
Display more verbose output for the -s option.
Path to the corosync-qdevice communication socket.


Qdevice information
Model:                  Net
Node ID:                1
HB interval:            10000ms
Sync HB interval:       30000ms
Configured node list:
    0   Node ID = 1
Ring ID:                1.a00000000021b48
Membership node list:   1
Quorate:                Yes
Quorum node list:
    0   Node ID = 1, State = member
Expected votes:         2
Last poll call:         2016-06-24T17:05:20 (cast vote)

Qdevice-net information
Cluster name:           Cluster
QNetd host:             localhost:5403
Connect timeout:        8000ms
HB interval:            8000ms
VQ vote timer interval: 5000ms
TLS:                    Supported
Algorithm:              Fifty-Fifty split
Tie-breaker:            Node with lowest node ID
Poll timer running:     Yes (cast vote)
State:                  Connected
TLS active:             Yes (client certificate sent)
Connected since:        2016-06-24T17:02:35
Echo reply received:    2016-06-24T17:05:15

The output is split into a generic qdevice section and a model specific section. Most of the items are just taken from corosync.conf file. It's helpful to note that the Membership node list is the membership list of the current node and should match the quorum node list. Last poll call is the timestamp (in iso format) of the last call to the votequorum_qdevice_poll function.

For model net, it's good to check the Poll timer running state. Internally, model net supports 3 states. Not voting (when Poll timer running is No it means that the corosync-qnetd algorithm decides that the current node shouldn't get a vote), voting (without cast vote) and voting (with cast vote).


Jan Friesse