hcheck - Cluster checker

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Ganeti                                                                                                 HCHECK(1)

       hcheck  is  the  cluster  checker.   It  prints  information  about cluster's health and checks whether a
       rebalance 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.

       hcheck - Cluster checker

       --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).

       Report bugs to the project's issue tracker or contact the developers using the Ganeti mailing list.

       Ganeti overview and  specifications:  ganeti(7)  (general  overview),  ganeti-os-interface(7)  (guest  OS
       definitions), 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-storage(8)   (storage   commands),   gnt-group(8)  (node  group  commands),  gnt-backup(8)  (instance
       import/export commands), 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).

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

       hcheck --version

       Backend options:

       { -mcluster | -L[path]|-t** data-file | -Ipath }

       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*inst...*][--exclude-instances*inst...*][--no-capacity-checks]

       Reporting options:

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