-#!/usr/bin/python
+#
#
# Copyright (C) 2006, 2007 Google Inc.
import textwrap
import os.path
import copy
+from cStringIO import StringIO
from ganeti import utils
from ganeti import logger
from ganeti import errors
from ganeti import mcpu
from ganeti import constants
+from ganeti import opcodes
from optparse import (OptionParser, make_option, TitledHelpFormatter,
Option, OptionValueError, SUPPRESS_HELP)
__all__ = ["DEBUG_OPT", "NOHDR_OPT", "SEP_OPT", "GenericMain", "SubmitOpCode",
"cli_option", "GenerateTable", "AskUser",
"ARGS_NONE", "ARGS_FIXED", "ARGS_ATLEAST", "ARGS_ANY", "ARGS_ONE",
- "USEUNITS_OPT", "FIELDS_OPT", "FORCE_OPT"]
+ "USEUNITS_OPT", "FIELDS_OPT", "FORCE_OPT",
+ "ListTags", "AddTags", "RemoveTags", "TAG_SRC_OPT",
+ "FormatError",
+ ]
+
+
+def _ExtractTagsObject(opts, args):
+ """Extract the tag type object.
+
+ Note that this function will modify its args parameter.
+
+ """
+ if not hasattr(opts, "tag_type"):
+ raise errors.ProgrammerError("tag_type not passed to _ExtractTagsObject")
+ kind = opts.tag_type
+ if kind == constants.TAG_CLUSTER:
+ retval = kind, kind
+ elif kind == constants.TAG_NODE or kind == constants.TAG_INSTANCE:
+ if not args:
+ raise errors.OpPrereqError("no arguments passed to the command")
+ name = args.pop(0)
+ retval = kind, name
+ else:
+ raise errors.ProgrammerError("Unhandled tag type '%s'" % kind)
+ return retval
+
+
+def _ExtendTags(opts, args):
+ """Extend the args if a source file has been given.
+
+ This function will extend the tags with the contents of the file
+ passed in the 'tags_source' attribute of the opts parameter. A file
+ named '-' will be replaced by stdin.
+
+ """
+ fname = opts.tags_source
+ if fname is None:
+ return
+ if fname == "-":
+ new_fh = sys.stdin
+ else:
+ new_fh = open(fname, "r")
+ new_data = []
+ try:
+ # we don't use the nice 'new_data = [line.strip() for line in fh]'
+ # because of python bug 1633941
+ while True:
+ line = new_fh.readline()
+ if not line:
+ break
+ new_data.append(line.strip())
+ finally:
+ new_fh.close()
+ args.extend(new_data)
+
+
+def ListTags(opts, args):
+ """List the tags on a given object.
+
+ This is a generic implementation that knows how to deal with all
+ three cases of tag objects (cluster, node, instance). The opts
+ argument is expected to contain a tag_type field denoting what
+ object type we work on.
+
+ """
+ kind, name = _ExtractTagsObject(opts, args)
+ op = opcodes.OpGetTags(kind=kind, name=name)
+ result = SubmitOpCode(op)
+ result = list(result)
+ result.sort()
+ for tag in result:
+ print tag
+
+
+def AddTags(opts, args):
+ """Add tags on a given object.
+
+ This is a generic implementation that knows how to deal with all
+ three cases of tag objects (cluster, node, instance). The opts
+ argument is expected to contain a tag_type field denoting what
+ object type we work on.
+
+ """
+ kind, name = _ExtractTagsObject(opts, args)
+ _ExtendTags(opts, args)
+ if not args:
+ raise errors.OpPrereqError("No tags to be added")
+ op = opcodes.OpAddTags(kind=kind, name=name, tags=args)
+ SubmitOpCode(op)
+
+
+def RemoveTags(opts, args):
+ """Remove tags from a given object.
+
+ This is a generic implementation that knows how to deal with all
+ three cases of tag objects (cluster, node, instance). The opts
+ argument is expected to contain a tag_type field denoting what
+ object type we work on.
+
+ """
+ kind, name = _ExtractTagsObject(opts, args)
+ _ExtendTags(opts, args)
+ if not args:
+ raise errors.OpPrereqError("No tags to be removed")
+ op = opcodes.OpDelTags(kind=kind, name=name, tags=args)
+ SubmitOpCode(op)
+
DEBUG_OPT = make_option("-d", "--debug", default=False,
action="store_true",
_LOCK_OPT = make_option("--lock-retries", default=None,
type="int", help=SUPPRESS_HELP)
+TAG_SRC_OPT = make_option("--from", dest="tags_source",
+ default=None, help="File with tag names")
def ARGS_FIXED(val):
"""Macro-like function denoting a fixed number of arguments"""
new_text.append(textwrap.fill(line, 70, replace_whitespace=False))
text = "\n".join(new_text)
try:
- f = file("/dev/tty", "r+")
+ f = file("/dev/tty", "a+")
except IOError:
return answer
try:
return answer
-def SubmitOpCode(op):
+def SubmitOpCode(op, proc=None, feedback_fn=None):
"""Function to submit an opcode.
This is just a simple wrapper over the construction of the processor
interaction functions.
"""
- proc = mcpu.Processor()
- return proc.ExecOpCode(op, logger.ToStdout)
+ if feedback_fn is None:
+ feedback_fn = logger.ToStdout
+ if proc is None:
+ proc = mcpu.Processor(feedback=feedback_fn)
+ return proc.ExecOpCode(op)
+
+
+def FormatError(err):
+ """Return a formatted error message for a given error.
+
+ This function takes an exception instance and returns a tuple
+ consisting of two values: first, the recommended exit code, and
+ second, a string describing the error message (not
+ newline-terminated).
+
+ """
+ retcode = 1
+ obuf = StringIO()
+ if isinstance(err, errors.ConfigurationError):
+ msg = "Corrupt configuration file: %s" % err
+ logger.Error(msg)
+ obuf.write(msg + "\n")
+ obuf.write("Aborting.")
+ retcode = 2
+ elif isinstance(err, errors.HooksAbort):
+ obuf.write("Failure: hooks execution failed:\n")
+ for node, script, out in err.args[0]:
+ if out:
+ obuf.write(" node: %s, script: %s, output: %s\n" %
+ (node, script, out))
+ else:
+ obuf.write(" node: %s, script: %s (no output)\n" %
+ (node, script))
+ elif isinstance(err, errors.HooksFailure):
+ obuf.write("Failure: hooks general failure: %s" % str(err))
+ elif isinstance(err, errors.ResolverError):
+ this_host = utils.HostInfo.SysName()
+ if err.args[0] == this_host:
+ msg = "Failure: can't resolve my own hostname ('%s')"
+ else:
+ msg = "Failure: can't resolve hostname '%s'"
+ obuf.write(msg % err.args[0])
+ elif isinstance(err, errors.OpPrereqError):
+ obuf.write("Failure: prerequisites not met for this"
+ " operation:\n%s" % str(err))
+ elif isinstance(err, errors.OpExecError):
+ obuf.write("Failure: command execution error:\n%s" % str(err))
+ elif isinstance(err, errors.TagError):
+ obuf.write("Failure: invalid tag(s) given:\n%s" % str(err))
+ elif isinstance(err, errors.GenericError):
+ obuf.write("Unhandled Ganeti error: %s" % str(err))
+ else:
+ obuf.write("Unhandled exception: %s" % str(err))
+ return retcode, obuf.getvalue().rstrip('\n')
-def GenericMain(commands):
+def GenericMain(commands, override=None):
"""Generic main function for all the gnt-* commands.
- Argument: a dictionary with a special structure, see the design doc
- for command line handling.
+ Arguments:
+ - commands: a dictionary with a special structure, see the design doc
+ for command line handling.
+ - override: if not None, we expect a dictionary with keys that will
+ override command line options; this can be used to pass
+ options from the scripts to generic functions
"""
# save the program name and the entire command line for later logging
if func is None: # parse error
return 1
+ if override is not None:
+ for key, val in override.iteritems():
+ setattr(options, key, val)
+
logger.SetupLogging(debug=options.debug, program=binary)
try:
try:
try:
result = func(options, args)
- except errors.ConfigurationError, err:
- logger.Error("Corrupt configuration file: %s" % err)
- logger.ToStderr("Aborting.")
- result = 2
- except errors.HooksAbort, err:
- logger.ToStderr("Failure: hooks execution failed:")
- for node, script, out in err.args[0]:
- if out:
- logger.ToStderr(" node: %s, script: %s, output: %s" %
- (node, script, out))
- else:
- logger.ToStderr(" node: %s, script: %s (no output)" %
- (node, script))
- result = 1
- except errors.HooksFailure, err:
- logger.ToStderr("Failure: hooks general failure: %s" % str(err))
- result = 1
- except errors.ResolverError, err:
- this_host = utils.HostInfo.SysName()
- if err.args[0] == this_host:
- msg = "Failure: can't resolve my own hostname ('%s')"
- else:
- msg = "Failure: can't resolve hostname '%s'"
- logger.ToStderr(msg % err.args[0])
- result = 1
- except errors.OpPrereqError, err:
- logger.ToStderr("Failure: prerequisites not met for this"
- " operation:\n%s" % str(err))
- result = 1
- except errors.OpExecError, err:
- logger.ToStderr("Failure: command execution error:\n%s" % str(err))
- result = 1
+ except errors.GenericError, err:
+ result, err_msg = FormatError(err)
+ logger.ToStderr(err_msg)
finally:
utils.Unlock('cmd')
utils.LockCleanup()
format_fields = []
for field in fields:
+ if headers and field not in headers:
+ raise errors.ProgrammerError("Missing header description for field '%s'"
+ % field)
if separator is not None:
format_fields.append("%s")
elif field in numfields:
pass
else:
val = row[idx] = utils.FormatUnit(val)
+ val = row[idx] = str(val)
if separator is None:
mlens[idx] = max(mlens[idx], len(val))
projects / ganeti-local / blobdiff