+# Cluster Verify error classes
+CV_TCLUSTER = "cluster"
+CV_TNODE = "node"
+CV_TINSTANCE = "instance"
+
+# Cluster Verify error codes and documentation
+CV_ECLUSTERCFG = \
+ (CV_TCLUSTER, "ECLUSTERCFG", "Cluster configuration verification failure")
+CV_ECLUSTERCERT = \
+ (CV_TCLUSTER, "ECLUSTERCERT",
+ "Cluster certificate files verification failure")
+CV_ECLUSTERFILECHECK = \
+ (CV_TCLUSTER, "ECLUSTERFILECHECK",
+ "Cluster configuration verification failure")
+CV_ECLUSTERDANGLINGNODES = \
+ (CV_TNODE, "ECLUSTERDANGLINGNODES",
+ "Some nodes belong to non-existing groups")
+CV_ECLUSTERDANGLINGINST = \
+ (CV_TNODE, "ECLUSTERDANGLINGINST",
+ "Some instances have a non-existing primary node")
+CV_EINSTANCEBADNODE = \
+ (CV_TINSTANCE, "EINSTANCEBADNODE",
+ "Instance marked as running lives on an offline node")
+CV_EINSTANCEDOWN = \
+ (CV_TINSTANCE, "EINSTANCEDOWN", "Instance not running on its primary node")
+CV_EINSTANCELAYOUT = \
+ (CV_TINSTANCE, "EINSTANCELAYOUT", "Instance has multiple secondary nodes")
+CV_EINSTANCEMISSINGDISK = \
+ (CV_TINSTANCE, "EINSTANCEMISSINGDISK", "Missing volume on an instance")
+CV_EINSTANCEFAULTYDISK = \
+ (CV_TINSTANCE, "EINSTANCEFAULTYDISK",
+ "Impossible to retrieve status for a disk")
+CV_EINSTANCEWRONGNODE = \
+ (CV_TINSTANCE, "EINSTANCEWRONGNODE", "Instance running on the wrong node")
+CV_EINSTANCESPLITGROUPS = \
+ (CV_TINSTANCE, "EINSTANCESPLITGROUPS",
+ "Instance with primary and secondary nodes in different groups")
+CV_EINSTANCEPOLICY = \
+ (CV_TINSTANCE, "EINSTANCEPOLICY",
+ "Instance does not meet policy")
+CV_ENODEDRBD = \
+ (CV_TNODE, "ENODEDRBD", "Error parsing the DRBD status file")
+CV_ENODEDRBDHELPER = \
+ (CV_TNODE, "ENODEDRBDHELPER", "Error caused by the DRBD helper")
+CV_ENODEFILECHECK = \
+ (CV_TNODE, "ENODEFILECHECK",
+ "Error retrieving the checksum of the node files")
+CV_ENODEHOOKS = \
+ (CV_TNODE, "ENODEHOOKS", "Communication failure in hooks execution")
+CV_ENODEHV = \
+ (CV_TNODE, "ENODEHV", "Hypervisor parameters verification failure")
+CV_ENODELVM = \
+ (CV_TNODE, "ENODELVM", "LVM-related node error")
+CV_ENODEN1 = \
+ (CV_TNODE, "ENODEN1", "Not enough memory to accommodate instance failovers")
+CV_ENODENET = \
+ (CV_TNODE, "ENODENET", "Network-related node error")
+CV_ENODEOS = \
+ (CV_TNODE, "ENODEOS", "OS-related node error")
+CV_ENODEORPHANINSTANCE = \
+ (CV_TNODE, "ENODEORPHANINSTANCE", "Unknown intance running on a node")
+CV_ENODEORPHANLV = \
+ (CV_TNODE, "ENODEORPHANLV", "Unknown LVM logical volume")
+CV_ENODERPC = \
+ (CV_TNODE, "ENODERPC",
+ "Error during connection to the primary node of an instance")
+CV_ENODESSH = \
+ (CV_TNODE, "ENODESSH", "SSH-related node error")
+CV_ENODEVERSION = \
+ (CV_TNODE, "ENODEVERSION",
+ "Protocol version mismatch or Ganeti version mismatch")
+CV_ENODESETUP = \
+ (CV_TNODE, "ENODESETUP", "Node setup error")
+CV_ENODETIME = \
+ (CV_TNODE, "ENODETIME", "Node returned invalid time")
+CV_ENODEOOBPATH = \
+ (CV_TNODE, "ENODEOOBPATH", "Invalid Out Of Band path")
+CV_ENODEUSERSCRIPTS = \
+ (CV_TNODE, "ENODEUSERSCRIPTS", "User scripts not present or not executable")
+
+CV_ALL_ECODES = frozenset([
+ CV_ECLUSTERCFG,
+ CV_ECLUSTERCERT,
+ CV_ECLUSTERFILECHECK,
+ CV_ECLUSTERDANGLINGNODES,
+ CV_ECLUSTERDANGLINGINST,
+ CV_EINSTANCEBADNODE,
+ CV_EINSTANCEDOWN,
+ CV_EINSTANCELAYOUT,
+ CV_EINSTANCEMISSINGDISK,
+ CV_EINSTANCEFAULTYDISK,
+ CV_EINSTANCEWRONGNODE,
+ CV_EINSTANCESPLITGROUPS,
+ CV_EINSTANCEPOLICY,
+ CV_ENODEDRBD,
+ CV_ENODEDRBDHELPER,
+ CV_ENODEFILECHECK,
+ CV_ENODEHOOKS,
+ CV_ENODEHV,
+ CV_ENODELVM,
+ CV_ENODEN1,
+ CV_ENODENET,
+ CV_ENODEOS,
+ CV_ENODEORPHANINSTANCE,
+ CV_ENODEORPHANLV,
+ CV_ENODERPC,
+ CV_ENODESSH,
+ CV_ENODEVERSION,
+ CV_ENODESETUP,
+ CV_ENODETIME,
+ CV_ENODEOOBPATH,
+ CV_ENODEUSERSCRIPTS,
+ ])
+
+CV_ALL_ECODES_STRINGS = frozenset(estr for (_, estr, _) in CV_ALL_ECODES)
+