collect logs [cluster_name]
This command collects log files and other related files from all
hosts. When the name of a cluster
cluster_name) is supplied with the
command, it collects all the log files
.log) as well as the configuration files
.err), and option files
.opt) used by all processes belonging to
the cluster, and also all the agent log files.
When an mcmd agent receives the
collect logs command from the
mcm agent it is connected with, it sets up a
TCP server socket using port 0, and lets the operating system
assign the actual port number. All agents in the site are then
instructed to perform the copying, and each of them spawns a TCP
client, which connects to the TCP server socket set up earlier
to copy the files over.
If a firewall or other networking issues prohibit the TCP
clients to connect to the TCP server socket, the
command will never complete.
The collected files are put under the MySQL Cluster Manager data repository
../mcm_data (relative to the installation
directory of MySQL Cluster Manager) by default, or specified by the option
--manager-directory) inside a
collected_files, under which
the files are organized under a hierarchy of timestamps [for the
file collections] and then host names; below the host name
level, the file organization mimics that on the host. For
example, the agent log for the host
collected on 2014-07-31 at
07:44:05, is found
cluster_name is omitted, only the
agent log files are collected.