Ubuntu Manpage: hcheck - Cluster checker

Provided by: ganeti-htools-3.0_3.0.2-1ubuntu1_amd64

NAME

       hcheck - Cluster checker

SYNOPSIS

       hcheck {backend options...} [algorithm options...] [reporting options...]

       hcheck --version

       Backend options:

       { -m cluster | -L[ path ] |-t** data-file | -I path }

       Algorithm options:

       [ --no-simulation ] [ --max-cpu *cpu-ratio* ] [ --min-disk *disk-ratio* ] [ -l *limit* ] [ -e *score* ] [
       -g  *delta* ] [ --min-gain-limit *threshold* ] [ -O *name...* ] [ --no-disk-moves ] [ --no-instance-moves
       ] [ -U *util-file* ] [ --ignore-dynu ] [ --ignore-soft-errors ] [ --evac-mode ] [ --select-instances *in‐
       st...* ] [ --exclude-instances *inst...* ] [ --no-capacity-checks ]

       Reporting options:

       [--machine-readable[=*CHOICE*] ] [ -p[ *fields* ] ] [ --print-instances ] [ -v... | -q ]

DESCRIPTION

       hcheck is the cluster checker.  It prints information about cluster's health and checks whether a  rebal‐
       ance done using hbal would help.

       This information can be presented in both human-readable and machine-readable way.

       Note that it does not take any action, only performs a rebalance simulation if necessary.

       For more information about the algorithm details check hbal(1).

       Additionally,  hcheck also checks if the cluster is globally N+1 redundant.  That is, it checks for every
       node, if after failing over the DRBD instances all instances on that  node  that  with  disks  externally
       stored can be restarted on some other node.

OPTIONS

       --no-simulation
              Only perform checks based on current cluster state, without trying to simulate rebalancing.

       --no-capacity-checks
              Do  not  check for global N+1 redundancy, i.e., do not warn if the shared-storage instances of one
              node cannot be moved to the others should that node fail.

       For a detailed description about the options listed  above  have  a  look  at  htools(1),  hspace(1)  and
       hbal(1).

REPORTING BUGS

       Report  bugs  to the project's issue tracker (https://github.com/ganeti/ganeti/issues) or contact the de‐
       velopers using the Ganeti mailing list.

       Ganeti overview and specifications: ganeti(7) (general overview), ganeti-os-interface(7) (guest OS defin‐
       itions), ganeti-extstorage-interface(7) (external storage providers).

       Ganeti commands: gnt-cluster(8) (cluster-wide commands), gnt-job(8) (job-related  commands),  gnt-node(8)
       (node-related  commands),  gnt-instance(8)  (instance commands), gnt-os(8) (guest OS commands), gnt-stor‐
       age(8) (storage commands), gnt-group(8) (node group commands), gnt-backup(8) (instance import/export com‐
       mands), gnt-debug(8) (debug commands).

       Ganeti daemons: ganeti-watcher(8) (automatic instance restarter), ganeti-cleaner(8) (job queue  cleaner),
       ganeti-noded(8) (node daemon), ganeti-rapi(8) (remote API daemon).

       Ganeti  htools: htools(1) (generic binary), hbal(1) (cluster balancer), hspace(1) (capacity calculation),
       hail(1) (IAllocator plugin), hscan(1) (data gatherer from remote clusters), hinfo(1) (cluster information
       printer), mon-collector(7) (data collectors interface).

COPYRIGHT

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