+SSH = "ssh"
+SCP = "scp"
+
+# reboot types
+INSTANCE_REBOOT_SOFT = "soft"
+INSTANCE_REBOOT_HARD = "hard"
+INSTANCE_REBOOT_FULL = "full"
+
+# Hypervisor constants
+HT_XEN_PVM30 = "xen-3.0"
+HT_FAKE = "fake"
+HT_XEN_HVM31 = "xen-hvm-3.1"
+HYPER_TYPES = frozenset([HT_XEN_PVM30, HT_FAKE, HT_XEN_HVM31])
+HTS_REQ_PORT = frozenset([HT_XEN_HVM31])
+
+HT_HVM_VNC_BASE_PORT = 5900
+HT_HVM_DEFAULT_BOOT_ORDER = 'dc'
+VNC_PASSWORD_FILE = _autoconf.SYSCONFDIR + "/ganeti/vnc-cluster-password"
+
+# Cluster Verify steps
+VERIFY_NPLUSONE_MEM = 'nplusone_mem'
+VERIFY_OPTIONAL_CHECKS = frozenset([VERIFY_NPLUSONE_MEM])
+
+# Allocator framework constants
+IALLOCATOR_DIR_IN = "in"
+IALLOCATOR_DIR_OUT = "out"
+IALLOCATOR_MODE_ALLOC = "allocate"
+IALLOCATOR_MODE_RELOC = "relocate"
+IALLOCATOR_SEARCH_PATH = _autoconf.IALLOCATOR_SEARCH_PATH
+IARUN_NOTFOUND = 1
+IARUN_FAILURE = 2
+IARUN_SUCCESS = 3