[PATCH 0/6] CTDB monitoring with Performance Co-Pilot

[David Disseldorp]

Hi,

ctdbd currently captures a bunch of interesting and useful runtime
metrics indicating the current load and health of a running node.
Call counters, request processing latencies and operation timeouts are
but a few of the metrics captured.

This patch series adds a CTDB Performance Metrics Domain Agent (PMDA),
which acts as an underlying data source for the Performance Co-Pilot
(PCP) suite of monitoring tools. This allows real-time and retrospective
analysis of distributed CTDB cluster nodes from a single pane with PCP
GUI utilities such as pmchart[1].

The PMDA runs as a separate process, periodically fetching metric data
from the locally running CTDB daemon. Feedback welcome.

Cheers, David

[1] pmchart screenshot - monitoring two CTDB nodes:
    https://milliways.coderausch.org/~ddiss/ctdb_pmda.png

--
The following changes since commit cdbc800a776f213cfd0ed543cee85b0d1714a186:

  tests:ctdb_fetch_lock_once   we must link with @POPT_OBJ@ in case -lpopt is not available (2011-09-02 13:31:41 +1000)

are available in the git repository at:
  git://oss.sgi.com/ddiss/ctdb mstr_pmda

David Disseldorp (6):
      pmda: Initial ctdb pmda check-in
      pmda: Attempt reconnects while ctdbd is unavailable
      pmda: Pull ctdb statistics once per fetch
      pmda: Use CTDB_PATH macro for default socket path
      pmda: document in README how to add a new metric
      pmda: handle struct latency_counter and add num_recoveries

 Makefile.in            |   18 ++-
 client/ctdb_client.c   |    2 +-
 configure.ac           |   20 ++
 include/ctdb_private.h |    1 +
 utils/pmda/Install     |   36 +++
 utils/pmda/README      |   84 +++++++
 utils/pmda/Remove      |   29 +++
 utils/pmda/domain.h    |   19 ++
 utils/pmda/help        |  106 +++++++++
 utils/pmda/pmda_ctdb.c |  596 ++++++++++++++++++++++++++++++++++++++++++++++++
 utils/pmda/pmns        |   73 ++++++
 utils/pmda/root        |   10 +
 12 files changed, 991 insertions(+), 3 deletions(-)
 create mode 100644 utils/pmda/Install
 create mode 100644 utils/pmda/README
 create mode 100644 utils/pmda/Remove
 create mode 100644 utils/pmda/domain.h
 create mode 100644 utils/pmda/help
 create mode 100644 utils/pmda/pmda_ctdb.c
 create mode 100644 utils/pmda/pmns
 create mode 100644 utils/pmda/root