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If you see outdated content please navigate to the page footer and click "Report an issue on GitHub".
It is not user documentation and should not be treated as such.
User Documentation is available here.
mom-balloon.conf
Copy the contents of the box below to /etc/vdsm/mom-balloon.conf on the hypervisor host.
[main]
# The wake up frequency of the main daemon (in seconds)
main-loop-interval: 5
# The data collection interval for host statistics (in seconds)
host-monitor-interval: 5
# The data collection interval for guest statistics (in seconds)
guest-monitor-interval: 5
# The wake up frequency of the guest manager (in seconds). The guest manager
# sets up monitoring and control for newly-created guests and cleans up after
# deleted guests.
guest-manager-interval: 5
# The interface MOM using to discover active guests and collect guest memory
# statistics. There're two choices for it: libvirt or vdsm.
hypervisor-interface: VDSM
# The wake up frequency of the policy engine (in seconds). During each
# interval the policy engine evaluates the policy and passes the results
# to each enabled controller plugin.
policy-engine-interval: 10
# A comma-separated list of Controller plugins to enable
controllers: Balloon, KSM
# Sets the maximum number of statistic samples to keep for the purpose of
# calculating moving averages.
sample-history-length: 10
# Set this to an existing, writable directory to enable plotting. For each
# invocation of the program a subdirectory momplot-NNN will be created where NNN
# is a sequence number. Within that directory, tab-delimited data files will be
# created and updated with all data generated by the configured Collectors.
plot-dir:
# Activate the RPC server on the designated port (-1 to disable). RPC is
# disabled by default until authentication is added to the protocol.
rpc-port: -1
# At startup, load a policy from the given file. If empty, no policy is loaded
policy: /etc/vdsm/mom-balloon.policy
[logging]
# Set the destination for program log messages. This can be either 'stdio' or
# a filename. When the log goes to a file, log rotation will be done
# automatically.
log: /var/log/vdsm/mom.log
# Set the logging verbosity level. The following levels are supported:
# 5 or debug: Debugging messages
# 4 or info: Detailed messages concerning normal program operation
# 3 or warn: Warning messages (program operation may be impacted)
# 2 or error: Errors that severely impact program operation
# 1 or critical: Emergency conditions
# This option can be specified by number or name.
verbosity: info
## The following two variables are used only when logging is directed to a file.
# Set the maximum size of a log file (in bytes) before it is rotated.
max-bytes: 2097152
# Set the maximum number of rotated logs to retain.
backup-count: 5
[host]
# A comma-separated list of Collector plugins to use for Host data collection.
collectors: HostMemory, HostKSM
[guest]
# A comma-separated list of Collector plugins to use for Guest data collection.
collectors: GuestQemuProc, GuestMemory, GuestBalloon