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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
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5 | a8083063 | Iustin Pop | #
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6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | a8083063 | Iustin Pop | # (at your option) any later version.
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10 | a8083063 | Iustin Pop | #
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11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | a8083063 | Iustin Pop | # General Public License for more details.
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15 | a8083063 | Iustin Pop | #
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16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | a8083063 | Iustin Pop | # 02110-1301, USA.
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20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | a8083063 | Iustin Pop | """Module dealing with command line parsing"""
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23 | a8083063 | Iustin Pop | |
24 | a8083063 | Iustin Pop | |
25 | a8083063 | Iustin Pop | import sys |
26 | a8083063 | Iustin Pop | import textwrap |
27 | a8083063 | Iustin Pop | import os.path |
28 | a8083063 | Iustin Pop | import copy |
29 | 73702ee7 | Iustin Pop | from cStringIO import StringIO |
30 | a8083063 | Iustin Pop | |
31 | a8083063 | Iustin Pop | from ganeti import utils |
32 | a8083063 | Iustin Pop | from ganeti import logger |
33 | a8083063 | Iustin Pop | from ganeti import errors |
34 | a8083063 | Iustin Pop | from ganeti import mcpu |
35 | a8083063 | Iustin Pop | from ganeti import constants |
36 | 846baef9 | Iustin Pop | from ganeti import opcodes |
37 | a8083063 | Iustin Pop | |
38 | a8083063 | Iustin Pop | from optparse import (OptionParser, make_option, TitledHelpFormatter, |
39 | a8083063 | Iustin Pop | Option, OptionValueError, SUPPRESS_HELP) |
40 | a8083063 | Iustin Pop | |
41 | a8083063 | Iustin Pop | __all__ = ["DEBUG_OPT", "NOHDR_OPT", "SEP_OPT", "GenericMain", "SubmitOpCode", |
42 | 47988778 | Iustin Pop | "cli_option", "GenerateTable", "AskUser", |
43 | a8083063 | Iustin Pop | "ARGS_NONE", "ARGS_FIXED", "ARGS_ATLEAST", "ARGS_ANY", "ARGS_ONE", |
44 | 846baef9 | Iustin Pop | "USEUNITS_OPT", "FIELDS_OPT", "FORCE_OPT", |
45 | 810c50b7 | Iustin Pop | "ListTags", "AddTags", "RemoveTags", "TAG_SRC_OPT", |
46 | 73702ee7 | Iustin Pop | "FormatError",
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47 | 846baef9 | Iustin Pop | ] |
48 | 846baef9 | Iustin Pop | |
49 | 846baef9 | Iustin Pop | |
50 | 846baef9 | Iustin Pop | def _ExtractTagsObject(opts, args): |
51 | 846baef9 | Iustin Pop | """Extract the tag type object.
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52 | 846baef9 | Iustin Pop |
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53 | 846baef9 | Iustin Pop | Note that this function will modify its args parameter.
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54 | 846baef9 | Iustin Pop |
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55 | 846baef9 | Iustin Pop | """
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56 | 846baef9 | Iustin Pop | if not hasattr(opts, "tag_type"): |
57 | 846baef9 | Iustin Pop | raise errors.ProgrammerError("tag_type not passed to _ExtractTagsObject") |
58 | 846baef9 | Iustin Pop | kind = opts.tag_type |
59 | 846baef9 | Iustin Pop | if kind == constants.TAG_CLUSTER:
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60 | 846baef9 | Iustin Pop | retval = kind, kind |
61 | 846baef9 | Iustin Pop | elif kind == constants.TAG_NODE or kind == constants.TAG_INSTANCE: |
62 | 846baef9 | Iustin Pop | if not args: |
63 | 0c434948 | Iustin Pop | raise errors.OpPrereqError("no arguments passed to the command") |
64 | 846baef9 | Iustin Pop | name = args.pop(0)
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65 | 846baef9 | Iustin Pop | retval = kind, name |
66 | 846baef9 | Iustin Pop | else:
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67 | 846baef9 | Iustin Pop | raise errors.ProgrammerError("Unhandled tag type '%s'" % kind) |
68 | 846baef9 | Iustin Pop | return retval
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69 | 846baef9 | Iustin Pop | |
70 | 846baef9 | Iustin Pop | |
71 | 810c50b7 | Iustin Pop | def _ExtendTags(opts, args): |
72 | 810c50b7 | Iustin Pop | """Extend the args if a source file has been given.
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73 | 810c50b7 | Iustin Pop |
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74 | 810c50b7 | Iustin Pop | This function will extend the tags with the contents of the file
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75 | 810c50b7 | Iustin Pop | passed in the 'tags_source' attribute of the opts parameter. A file
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76 | 810c50b7 | Iustin Pop | named '-' will be replaced by stdin.
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77 | 810c50b7 | Iustin Pop |
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78 | 810c50b7 | Iustin Pop | """
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79 | 810c50b7 | Iustin Pop | fname = opts.tags_source |
80 | 810c50b7 | Iustin Pop | if fname is None: |
81 | 810c50b7 | Iustin Pop | return
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82 | 810c50b7 | Iustin Pop | if fname == "-": |
83 | 810c50b7 | Iustin Pop | new_fh = sys.stdin |
84 | 810c50b7 | Iustin Pop | else:
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85 | 810c50b7 | Iustin Pop | new_fh = open(fname, "r") |
86 | 810c50b7 | Iustin Pop | new_data = [] |
87 | 810c50b7 | Iustin Pop | try:
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88 | 810c50b7 | Iustin Pop | # we don't use the nice 'new_data = [line.strip() for line in fh]'
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89 | 810c50b7 | Iustin Pop | # because of python bug 1633941
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90 | 810c50b7 | Iustin Pop | while True: |
91 | 810c50b7 | Iustin Pop | line = new_fh.readline() |
92 | 810c50b7 | Iustin Pop | if not line: |
93 | 810c50b7 | Iustin Pop | break
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94 | 810c50b7 | Iustin Pop | new_data.append(line.strip()) |
95 | 810c50b7 | Iustin Pop | finally:
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96 | 810c50b7 | Iustin Pop | new_fh.close() |
97 | 810c50b7 | Iustin Pop | args.extend(new_data) |
98 | 810c50b7 | Iustin Pop | |
99 | 810c50b7 | Iustin Pop | |
100 | 846baef9 | Iustin Pop | def ListTags(opts, args): |
101 | 846baef9 | Iustin Pop | """List the tags on a given object.
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102 | 846baef9 | Iustin Pop |
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103 | 846baef9 | Iustin Pop | This is a generic implementation that knows how to deal with all
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104 | 846baef9 | Iustin Pop | three cases of tag objects (cluster, node, instance). The opts
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105 | 846baef9 | Iustin Pop | argument is expected to contain a tag_type field denoting what
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106 | 846baef9 | Iustin Pop | object type we work on.
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107 | 846baef9 | Iustin Pop |
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108 | 846baef9 | Iustin Pop | """
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109 | 846baef9 | Iustin Pop | kind, name = _ExtractTagsObject(opts, args) |
110 | 846baef9 | Iustin Pop | op = opcodes.OpGetTags(kind=kind, name=name) |
111 | 846baef9 | Iustin Pop | result = SubmitOpCode(op) |
112 | 846baef9 | Iustin Pop | result = list(result)
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113 | 846baef9 | Iustin Pop | result.sort() |
114 | 846baef9 | Iustin Pop | for tag in result: |
115 | 846baef9 | Iustin Pop | print tag
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116 | 846baef9 | Iustin Pop | |
117 | 846baef9 | Iustin Pop | |
118 | 846baef9 | Iustin Pop | def AddTags(opts, args): |
119 | 846baef9 | Iustin Pop | """Add tags on a given object.
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120 | 846baef9 | Iustin Pop |
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121 | 846baef9 | Iustin Pop | This is a generic implementation that knows how to deal with all
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122 | 846baef9 | Iustin Pop | three cases of tag objects (cluster, node, instance). The opts
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123 | 846baef9 | Iustin Pop | argument is expected to contain a tag_type field denoting what
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124 | 846baef9 | Iustin Pop | object type we work on.
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125 | 846baef9 | Iustin Pop |
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126 | 846baef9 | Iustin Pop | """
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127 | 846baef9 | Iustin Pop | kind, name = _ExtractTagsObject(opts, args) |
128 | 810c50b7 | Iustin Pop | _ExtendTags(opts, args) |
129 | 846baef9 | Iustin Pop | if not args: |
130 | 846baef9 | Iustin Pop | raise errors.OpPrereqError("No tags to be added") |
131 | 846baef9 | Iustin Pop | op = opcodes.OpAddTags(kind=kind, name=name, tags=args) |
132 | 846baef9 | Iustin Pop | SubmitOpCode(op) |
133 | 846baef9 | Iustin Pop | |
134 | 846baef9 | Iustin Pop | |
135 | 846baef9 | Iustin Pop | def RemoveTags(opts, args): |
136 | 846baef9 | Iustin Pop | """Remove tags from a given object.
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137 | 846baef9 | Iustin Pop |
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138 | 846baef9 | Iustin Pop | This is a generic implementation that knows how to deal with all
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139 | 846baef9 | Iustin Pop | three cases of tag objects (cluster, node, instance). The opts
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140 | 846baef9 | Iustin Pop | argument is expected to contain a tag_type field denoting what
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141 | 846baef9 | Iustin Pop | object type we work on.
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142 | 846baef9 | Iustin Pop |
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143 | 846baef9 | Iustin Pop | """
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144 | 846baef9 | Iustin Pop | kind, name = _ExtractTagsObject(opts, args) |
145 | 810c50b7 | Iustin Pop | _ExtendTags(opts, args) |
146 | 846baef9 | Iustin Pop | if not args: |
147 | 846baef9 | Iustin Pop | raise errors.OpPrereqError("No tags to be removed") |
148 | 846baef9 | Iustin Pop | op = opcodes.OpDelTags(kind=kind, name=name, tags=args) |
149 | 846baef9 | Iustin Pop | SubmitOpCode(op) |
150 | 846baef9 | Iustin Pop | |
151 | a8083063 | Iustin Pop | |
152 | a8083063 | Iustin Pop | DEBUG_OPT = make_option("-d", "--debug", default=False, |
153 | a8083063 | Iustin Pop | action="store_true",
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154 | a8083063 | Iustin Pop | help="Turn debugging on")
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155 | a8083063 | Iustin Pop | |
156 | a8083063 | Iustin Pop | NOHDR_OPT = make_option("--no-headers", default=False, |
157 | a8083063 | Iustin Pop | action="store_true", dest="no_headers", |
158 | a8083063 | Iustin Pop | help="Don't display column headers")
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159 | a8083063 | Iustin Pop | |
160 | 137161c9 | Michael Hanselmann | SEP_OPT = make_option("--separator", default=None, |
161 | a8083063 | Iustin Pop | action="store", dest="separator", |
162 | a8083063 | Iustin Pop | help="Separator between output fields"
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163 | a8083063 | Iustin Pop | " (defaults to one space)")
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164 | a8083063 | Iustin Pop | |
165 | a8083063 | Iustin Pop | USEUNITS_OPT = make_option("--human-readable", default=False, |
166 | a8083063 | Iustin Pop | action="store_true", dest="human_readable", |
167 | a8083063 | Iustin Pop | help="Print sizes in human readable format")
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168 | a8083063 | Iustin Pop | |
169 | dcb93971 | Michael Hanselmann | FIELDS_OPT = make_option("-o", "--output", dest="output", action="store", |
170 | dcb93971 | Michael Hanselmann | type="string", help="Select output fields", |
171 | dcb93971 | Michael Hanselmann | metavar="FIELDS")
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172 | dcb93971 | Michael Hanselmann | |
173 | fe7b0351 | Michael Hanselmann | FORCE_OPT = make_option("-f", "--force", dest="force", action="store_true", |
174 | fe7b0351 | Michael Hanselmann | default=False, help="Force the operation") |
175 | fe7b0351 | Michael Hanselmann | |
176 | a8083063 | Iustin Pop | _LOCK_OPT = make_option("--lock-retries", default=None, |
177 | a8083063 | Iustin Pop | type="int", help=SUPPRESS_HELP)
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178 | a8083063 | Iustin Pop | |
179 | 810c50b7 | Iustin Pop | TAG_SRC_OPT = make_option("--from", dest="tags_source", |
180 | 810c50b7 | Iustin Pop | default=None, help="File with tag names") |
181 | 810c50b7 | Iustin Pop | |
182 | a8083063 | Iustin Pop | def ARGS_FIXED(val): |
183 | a8083063 | Iustin Pop | """Macro-like function denoting a fixed number of arguments"""
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184 | a8083063 | Iustin Pop | return -val
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185 | a8083063 | Iustin Pop | |
186 | a8083063 | Iustin Pop | |
187 | a8083063 | Iustin Pop | def ARGS_ATLEAST(val): |
188 | a8083063 | Iustin Pop | """Macro-like function denoting a minimum number of arguments"""
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189 | a8083063 | Iustin Pop | return val
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190 | a8083063 | Iustin Pop | |
191 | a8083063 | Iustin Pop | |
192 | a8083063 | Iustin Pop | ARGS_NONE = None
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193 | a8083063 | Iustin Pop | ARGS_ONE = ARGS_FIXED(1)
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194 | a8083063 | Iustin Pop | ARGS_ANY = ARGS_ATLEAST(0)
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195 | a8083063 | Iustin Pop | |
196 | a8083063 | Iustin Pop | |
197 | a8083063 | Iustin Pop | def check_unit(option, opt, value): |
198 | a8083063 | Iustin Pop | try:
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199 | a8083063 | Iustin Pop | return utils.ParseUnit(value)
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200 | a8083063 | Iustin Pop | except errors.UnitParseError, err:
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201 | 3ecf6786 | Iustin Pop | raise OptionValueError("option %s: %s" % (opt, err)) |
202 | a8083063 | Iustin Pop | |
203 | a8083063 | Iustin Pop | |
204 | a8083063 | Iustin Pop | class CliOption(Option): |
205 | a8083063 | Iustin Pop | TYPES = Option.TYPES + ("unit",)
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206 | a8083063 | Iustin Pop | TYPE_CHECKER = copy.copy(Option.TYPE_CHECKER) |
207 | a8083063 | Iustin Pop | TYPE_CHECKER["unit"] = check_unit
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208 | a8083063 | Iustin Pop | |
209 | a8083063 | Iustin Pop | |
210 | a8083063 | Iustin Pop | # optparse.py sets make_option, so we do it for our own option class, too
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211 | a8083063 | Iustin Pop | cli_option = CliOption |
212 | a8083063 | Iustin Pop | |
213 | a8083063 | Iustin Pop | |
214 | a8083063 | Iustin Pop | def _ParseArgs(argv, commands): |
215 | a8083063 | Iustin Pop | """Parses the command line and return the function which must be
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216 | a8083063 | Iustin Pop | executed together with its arguments
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217 | a8083063 | Iustin Pop |
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218 | a8083063 | Iustin Pop | Arguments:
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219 | a8083063 | Iustin Pop | argv: the command line
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220 | a8083063 | Iustin Pop |
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221 | a8083063 | Iustin Pop | commands: dictionary with special contents, see the design doc for
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222 | a8083063 | Iustin Pop | cmdline handling
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223 | 098c0958 | Michael Hanselmann |
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224 | a8083063 | Iustin Pop | """
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225 | a8083063 | Iustin Pop | if len(argv) == 0: |
226 | a8083063 | Iustin Pop | binary = "<command>"
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227 | a8083063 | Iustin Pop | else:
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228 | a8083063 | Iustin Pop | binary = argv[0].split("/")[-1] |
229 | a8083063 | Iustin Pop | |
230 | a8083063 | Iustin Pop | if len(argv) > 1 and argv[1] == "--version": |
231 | a8083063 | Iustin Pop | print "%s (ganeti) %s" % (binary, constants.RELEASE_VERSION) |
232 | a8083063 | Iustin Pop | # Quit right away. That way we don't have to care about this special
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233 | a8083063 | Iustin Pop | # argument. optparse.py does it the same.
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234 | a8083063 | Iustin Pop | sys.exit(0)
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235 | a8083063 | Iustin Pop | |
236 | a8083063 | Iustin Pop | if len(argv) < 2 or argv[1] not in commands.keys(): |
237 | a8083063 | Iustin Pop | # let's do a nice thing
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238 | a8083063 | Iustin Pop | sortedcmds = commands.keys() |
239 | a8083063 | Iustin Pop | sortedcmds.sort() |
240 | a8083063 | Iustin Pop | print ("Usage: %(bin)s {command} [options...] [argument...]" |
241 | a8083063 | Iustin Pop | "\n%(bin)s <command> --help to see details, or"
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242 | a8083063 | Iustin Pop | " man %(bin)s\n" % {"bin": binary}) |
243 | a8083063 | Iustin Pop | # compute the max line length for cmd + usage
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244 | a8083063 | Iustin Pop | mlen = max([len(" %s %s" % (cmd, commands[cmd][3])) for cmd in commands]) |
245 | a8083063 | Iustin Pop | mlen = min(60, mlen) # should not get here... |
246 | a8083063 | Iustin Pop | # and format a nice command list
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247 | a8083063 | Iustin Pop | print "Commands:" |
248 | a8083063 | Iustin Pop | for cmd in sortedcmds: |
249 | a8083063 | Iustin Pop | cmdstr = " %s %s" % (cmd, commands[cmd][3]) |
250 | a8083063 | Iustin Pop | help_text = commands[cmd][4]
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251 | a8083063 | Iustin Pop | help_lines = textwrap.wrap(help_text, 79-3-mlen) |
252 | a8083063 | Iustin Pop | print "%-*s - %s" % (mlen, cmdstr, |
253 | a8083063 | Iustin Pop | help_lines.pop(0))
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254 | a8083063 | Iustin Pop | for line in help_lines: |
255 | a8083063 | Iustin Pop | print "%-*s %s" % (mlen, "", line) |
256 | a8083063 | Iustin Pop | print
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257 | a8083063 | Iustin Pop | return None, None, None |
258 | a8083063 | Iustin Pop | cmd = argv.pop(1)
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259 | a8083063 | Iustin Pop | func, nargs, parser_opts, usage, description = commands[cmd] |
260 | a8083063 | Iustin Pop | parser_opts.append(_LOCK_OPT) |
261 | a8083063 | Iustin Pop | parser = OptionParser(option_list=parser_opts, |
262 | a8083063 | Iustin Pop | description=description, |
263 | a8083063 | Iustin Pop | formatter=TitledHelpFormatter(), |
264 | a8083063 | Iustin Pop | usage="%%prog %s %s" % (cmd, usage))
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265 | a8083063 | Iustin Pop | parser.disable_interspersed_args() |
266 | a8083063 | Iustin Pop | options, args = parser.parse_args() |
267 | a8083063 | Iustin Pop | if nargs is None: |
268 | a8083063 | Iustin Pop | if len(args) != 0: |
269 | a8083063 | Iustin Pop | print >> sys.stderr, ("Error: Command %s expects no arguments" % cmd) |
270 | a8083063 | Iustin Pop | return None, None, None |
271 | a8083063 | Iustin Pop | elif nargs < 0 and len(args) != -nargs: |
272 | a8083063 | Iustin Pop | print >> sys.stderr, ("Error: Command %s expects %d argument(s)" % |
273 | a8083063 | Iustin Pop | (cmd, -nargs)) |
274 | a8083063 | Iustin Pop | return None, None, None |
275 | a8083063 | Iustin Pop | elif nargs >= 0 and len(args) < nargs: |
276 | a8083063 | Iustin Pop | print >> sys.stderr, ("Error: Command %s expects at least %d argument(s)" % |
277 | a8083063 | Iustin Pop | (cmd, nargs)) |
278 | a8083063 | Iustin Pop | return None, None, None |
279 | a8083063 | Iustin Pop | |
280 | a8083063 | Iustin Pop | return func, options, args
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281 | a8083063 | Iustin Pop | |
282 | a8083063 | Iustin Pop | |
283 | 47988778 | Iustin Pop | def AskUser(text, choices=None): |
284 | 47988778 | Iustin Pop | """Ask the user a question.
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285 | a8083063 | Iustin Pop |
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286 | a8083063 | Iustin Pop | Args:
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287 | 47988778 | Iustin Pop | text - the question to ask.
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288 | a8083063 | Iustin Pop |
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289 | 47988778 | Iustin Pop | choices - list with elements tuples (input_char, return_value,
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290 | 47988778 | Iustin Pop | description); if not given, it will default to: [('y', True,
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291 | 47988778 | Iustin Pop | 'Perform the operation'), ('n', False, 'Do no do the operation')];
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292 | 47988778 | Iustin Pop | note that the '?' char is reserved for help
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293 | 47988778 | Iustin Pop |
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294 | 47988778 | Iustin Pop | Returns: one of the return values from the choices list; if input is
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295 | 47988778 | Iustin Pop | not possible (i.e. not running with a tty, we return the last entry
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296 | 47988778 | Iustin Pop | from the list
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297 | a8083063 | Iustin Pop |
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298 | a8083063 | Iustin Pop | """
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299 | 47988778 | Iustin Pop | if choices is None: |
300 | 47988778 | Iustin Pop | choices = [('y', True, 'Perform the operation'), |
301 | 47988778 | Iustin Pop | ('n', False, 'Do not perform the operation')] |
302 | 47988778 | Iustin Pop | if not choices or not isinstance(choices, list): |
303 | 47988778 | Iustin Pop | raise errors.ProgrammerError("Invalid choiches argument to AskUser") |
304 | 47988778 | Iustin Pop | for entry in choices: |
305 | 47988778 | Iustin Pop | if not isinstance(entry, tuple) or len(entry) < 3 or entry[0] == '?': |
306 | 47988778 | Iustin Pop | raise errors.ProgrammerError("Invalid choiches element to AskUser") |
307 | 47988778 | Iustin Pop | |
308 | 47988778 | Iustin Pop | answer = choices[-1][1] |
309 | 47988778 | Iustin Pop | new_text = [] |
310 | 47988778 | Iustin Pop | for line in text.splitlines(): |
311 | 47988778 | Iustin Pop | new_text.append(textwrap.fill(line, 70, replace_whitespace=False)) |
312 | 47988778 | Iustin Pop | text = "\n".join(new_text)
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313 | a8083063 | Iustin Pop | try:
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314 | 3023170f | Iustin Pop | f = file("/dev/tty", "a+") |
315 | a8083063 | Iustin Pop | except IOError: |
316 | 47988778 | Iustin Pop | return answer
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317 | a8083063 | Iustin Pop | try:
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318 | 47988778 | Iustin Pop | chars = [entry[0] for entry in choices] |
319 | 47988778 | Iustin Pop | chars[-1] = "[%s]" % chars[-1] |
320 | 47988778 | Iustin Pop | chars.append('?')
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321 | 47988778 | Iustin Pop | maps = dict([(entry[0], entry[1]) for entry in choices]) |
322 | 47988778 | Iustin Pop | while True: |
323 | 47988778 | Iustin Pop | f.write(text) |
324 | 47988778 | Iustin Pop | f.write('\n')
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325 | 47988778 | Iustin Pop | f.write("/".join(chars))
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326 | 47988778 | Iustin Pop | f.write(": ")
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327 | 47988778 | Iustin Pop | line = f.readline(2).strip().lower()
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328 | 47988778 | Iustin Pop | if line in maps: |
329 | 47988778 | Iustin Pop | answer = maps[line] |
330 | 47988778 | Iustin Pop | break
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331 | 47988778 | Iustin Pop | elif line == '?': |
332 | 47988778 | Iustin Pop | for entry in choices: |
333 | 47988778 | Iustin Pop | f.write(" %s - %s\n" % (entry[0], entry[2])) |
334 | 47988778 | Iustin Pop | f.write("\n")
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335 | 47988778 | Iustin Pop | continue
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336 | a8083063 | Iustin Pop | finally:
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337 | a8083063 | Iustin Pop | f.close() |
338 | a8083063 | Iustin Pop | return answer
|
339 | a8083063 | Iustin Pop | |
340 | a8083063 | Iustin Pop | |
341 | 9f33ef86 | Iustin Pop | def SubmitOpCode(op, proc=None, feedback_fn=None): |
342 | a8083063 | Iustin Pop | """Function to submit an opcode.
|
343 | a8083063 | Iustin Pop |
|
344 | a8083063 | Iustin Pop | This is just a simple wrapper over the construction of the processor
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345 | a8083063 | Iustin Pop | instance. It should be extended to better handle feedback and
|
346 | a8083063 | Iustin Pop | interaction functions.
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347 | a8083063 | Iustin Pop |
|
348 | a8083063 | Iustin Pop | """
|
349 | 9f33ef86 | Iustin Pop | if proc is None: |
350 | 9f33ef86 | Iustin Pop | proc = mcpu.Processor() |
351 | 9f33ef86 | Iustin Pop | if feedback_fn is None: |
352 | 9f33ef86 | Iustin Pop | feedback_fn = logger.ToStdout |
353 | 9f33ef86 | Iustin Pop | return proc.ExecOpCode(op, feedback_fn)
|
354 | a8083063 | Iustin Pop | |
355 | a8083063 | Iustin Pop | |
356 | 73702ee7 | Iustin Pop | def FormatError(err): |
357 | 73702ee7 | Iustin Pop | """Return a formatted error message for a given error.
|
358 | 73702ee7 | Iustin Pop |
|
359 | 73702ee7 | Iustin Pop | This function takes an exception instance and returns a tuple
|
360 | 73702ee7 | Iustin Pop | consisting of two values: first, the recommended exit code, and
|
361 | 73702ee7 | Iustin Pop | second, a string describing the error message (not
|
362 | 73702ee7 | Iustin Pop | newline-terminated).
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363 | 73702ee7 | Iustin Pop |
|
364 | 73702ee7 | Iustin Pop | """
|
365 | 73702ee7 | Iustin Pop | retcode = 1
|
366 | 73702ee7 | Iustin Pop | obuf = StringIO() |
367 | 73702ee7 | Iustin Pop | if isinstance(err, errors.ConfigurationError): |
368 | 73702ee7 | Iustin Pop | msg = "Corrupt configuration file: %s" % err
|
369 | 73702ee7 | Iustin Pop | logger.Error(msg) |
370 | 73702ee7 | Iustin Pop | obuf.write(msg + "\n")
|
371 | 73702ee7 | Iustin Pop | obuf.write("Aborting.")
|
372 | 73702ee7 | Iustin Pop | retcode = 2
|
373 | 73702ee7 | Iustin Pop | elif isinstance(err, errors.HooksAbort): |
374 | 73702ee7 | Iustin Pop | obuf.write("Failure: hooks execution failed:\n")
|
375 | 73702ee7 | Iustin Pop | for node, script, out in err.args[0]: |
376 | 73702ee7 | Iustin Pop | if out:
|
377 | 73702ee7 | Iustin Pop | obuf.write(" node: %s, script: %s, output: %s\n" %
|
378 | 73702ee7 | Iustin Pop | (node, script, out)) |
379 | 73702ee7 | Iustin Pop | else:
|
380 | 73702ee7 | Iustin Pop | obuf.write(" node: %s, script: %s (no output)\n" %
|
381 | 73702ee7 | Iustin Pop | (node, script)) |
382 | 73702ee7 | Iustin Pop | elif isinstance(err, errors.HooksFailure): |
383 | 73702ee7 | Iustin Pop | obuf.write("Failure: hooks general failure: %s" % str(err)) |
384 | 73702ee7 | Iustin Pop | elif isinstance(err, errors.ResolverError): |
385 | 73702ee7 | Iustin Pop | this_host = utils.HostInfo.SysName() |
386 | 73702ee7 | Iustin Pop | if err.args[0] == this_host: |
387 | 73702ee7 | Iustin Pop | msg = "Failure: can't resolve my own hostname ('%s')"
|
388 | 73702ee7 | Iustin Pop | else:
|
389 | 73702ee7 | Iustin Pop | msg = "Failure: can't resolve hostname '%s'"
|
390 | 73702ee7 | Iustin Pop | obuf.write(msg % err.args[0])
|
391 | 73702ee7 | Iustin Pop | elif isinstance(err, errors.OpPrereqError): |
392 | 73702ee7 | Iustin Pop | obuf.write("Failure: prerequisites not met for this"
|
393 | 73702ee7 | Iustin Pop | " operation:\n%s" % str(err)) |
394 | 73702ee7 | Iustin Pop | elif isinstance(err, errors.OpExecError): |
395 | 73702ee7 | Iustin Pop | obuf.write("Failure: command execution error:\n%s" % str(err)) |
396 | 73702ee7 | Iustin Pop | elif isinstance(err, errors.TagError): |
397 | 73702ee7 | Iustin Pop | obuf.write("Failure: invalid tag(s) given:\n%s" % str(err)) |
398 | 73702ee7 | Iustin Pop | elif isinstance(err, errors.GenericError): |
399 | 73702ee7 | Iustin Pop | obuf.write("Unhandled Ganeti error: %s" % str(err)) |
400 | 73702ee7 | Iustin Pop | else:
|
401 | 73702ee7 | Iustin Pop | obuf.write("Unhandled exception: %s" % str(err)) |
402 | 73702ee7 | Iustin Pop | return retcode, obuf.getvalue().rstrip('\n') |
403 | 73702ee7 | Iustin Pop | |
404 | 73702ee7 | Iustin Pop | |
405 | 334d1483 | Iustin Pop | def GenericMain(commands, override=None): |
406 | a8083063 | Iustin Pop | """Generic main function for all the gnt-* commands.
|
407 | a8083063 | Iustin Pop |
|
408 | 334d1483 | Iustin Pop | Arguments:
|
409 | 334d1483 | Iustin Pop | - commands: a dictionary with a special structure, see the design doc
|
410 | 334d1483 | Iustin Pop | for command line handling.
|
411 | 334d1483 | Iustin Pop | - override: if not None, we expect a dictionary with keys that will
|
412 | 334d1483 | Iustin Pop | override command line options; this can be used to pass
|
413 | 334d1483 | Iustin Pop | options from the scripts to generic functions
|
414 | a8083063 | Iustin Pop |
|
415 | a8083063 | Iustin Pop | """
|
416 | a8083063 | Iustin Pop | # save the program name and the entire command line for later logging
|
417 | a8083063 | Iustin Pop | if sys.argv:
|
418 | a8083063 | Iustin Pop | binary = os.path.basename(sys.argv[0]) or sys.argv[0] |
419 | a8083063 | Iustin Pop | if len(sys.argv) >= 2: |
420 | a8083063 | Iustin Pop | binary += " " + sys.argv[1] |
421 | a8083063 | Iustin Pop | old_cmdline = " ".join(sys.argv[2:]) |
422 | a8083063 | Iustin Pop | else:
|
423 | a8083063 | Iustin Pop | old_cmdline = ""
|
424 | a8083063 | Iustin Pop | else:
|
425 | a8083063 | Iustin Pop | binary = "<unknown program>"
|
426 | a8083063 | Iustin Pop | old_cmdline = ""
|
427 | a8083063 | Iustin Pop | |
428 | a8083063 | Iustin Pop | func, options, args = _ParseArgs(sys.argv, commands) |
429 | a8083063 | Iustin Pop | if func is None: # parse error |
430 | a8083063 | Iustin Pop | return 1 |
431 | a8083063 | Iustin Pop | |
432 | 334d1483 | Iustin Pop | if override is not None: |
433 | 334d1483 | Iustin Pop | for key, val in override.iteritems(): |
434 | 334d1483 | Iustin Pop | setattr(options, key, val)
|
435 | 334d1483 | Iustin Pop | |
436 | a8083063 | Iustin Pop | logger.SetupLogging(debug=options.debug, program=binary) |
437 | a8083063 | Iustin Pop | |
438 | a8083063 | Iustin Pop | try:
|
439 | a8083063 | Iustin Pop | utils.Lock('cmd', max_retries=options.lock_retries, debug=options.debug)
|
440 | a8083063 | Iustin Pop | except errors.LockError, err:
|
441 | a8083063 | Iustin Pop | logger.ToStderr(str(err))
|
442 | a8083063 | Iustin Pop | return 1 |
443 | a8083063 | Iustin Pop | |
444 | a8083063 | Iustin Pop | if old_cmdline:
|
445 | a8083063 | Iustin Pop | logger.Info("run with arguments '%s'" % old_cmdline)
|
446 | a8083063 | Iustin Pop | else:
|
447 | a8083063 | Iustin Pop | logger.Info("run with no arguments")
|
448 | a8083063 | Iustin Pop | |
449 | a8083063 | Iustin Pop | try:
|
450 | a8083063 | Iustin Pop | try:
|
451 | a8083063 | Iustin Pop | result = func(options, args) |
452 | 73702ee7 | Iustin Pop | except errors.GenericError, err:
|
453 | 73702ee7 | Iustin Pop | result, err_msg = FormatError(err) |
454 | 73702ee7 | Iustin Pop | logger.ToStderr(err_msg) |
455 | a8083063 | Iustin Pop | finally:
|
456 | a8083063 | Iustin Pop | utils.Unlock('cmd')
|
457 | a8083063 | Iustin Pop | utils.LockCleanup() |
458 | a8083063 | Iustin Pop | |
459 | a8083063 | Iustin Pop | return result
|
460 | 137161c9 | Michael Hanselmann | |
461 | 137161c9 | Michael Hanselmann | |
462 | 16be8703 | Iustin Pop | def GenerateTable(headers, fields, separator, data, |
463 | 16be8703 | Iustin Pop | numfields=None, unitfields=None): |
464 | 137161c9 | Michael Hanselmann | """Prints a table with headers and different fields.
|
465 | 137161c9 | Michael Hanselmann |
|
466 | 137161c9 | Michael Hanselmann | Args:
|
467 | 137161c9 | Michael Hanselmann | headers: Dict of header titles or None if no headers should be shown
|
468 | 137161c9 | Michael Hanselmann | fields: List of fields to show
|
469 | 137161c9 | Michael Hanselmann | separator: String used to separate fields or None for spaces
|
470 | 137161c9 | Michael Hanselmann | data: Data to be printed
|
471 | 137161c9 | Michael Hanselmann | numfields: List of fields to be aligned to right
|
472 | 137161c9 | Michael Hanselmann | unitfields: List of fields to be formatted as units
|
473 | 137161c9 | Michael Hanselmann |
|
474 | 137161c9 | Michael Hanselmann | """
|
475 | 137161c9 | Michael Hanselmann | if numfields is None: |
476 | 137161c9 | Michael Hanselmann | numfields = [] |
477 | 137161c9 | Michael Hanselmann | if unitfields is None: |
478 | 137161c9 | Michael Hanselmann | unitfields = [] |
479 | 137161c9 | Michael Hanselmann | |
480 | 137161c9 | Michael Hanselmann | format_fields = [] |
481 | 137161c9 | Michael Hanselmann | for field in fields: |
482 | 137161c9 | Michael Hanselmann | if separator is not None: |
483 | 137161c9 | Michael Hanselmann | format_fields.append("%s")
|
484 | 137161c9 | Michael Hanselmann | elif field in numfields: |
485 | 137161c9 | Michael Hanselmann | format_fields.append("%*s")
|
486 | 137161c9 | Michael Hanselmann | else:
|
487 | 137161c9 | Michael Hanselmann | format_fields.append("%-*s")
|
488 | 137161c9 | Michael Hanselmann | |
489 | 137161c9 | Michael Hanselmann | if separator is None: |
490 | 137161c9 | Michael Hanselmann | mlens = [0 for name in fields] |
491 | 137161c9 | Michael Hanselmann | format = ' '.join(format_fields)
|
492 | 137161c9 | Michael Hanselmann | else:
|
493 | 137161c9 | Michael Hanselmann | format = separator.replace("%", "%%").join(format_fields) |
494 | 137161c9 | Michael Hanselmann | |
495 | 137161c9 | Michael Hanselmann | for row in data: |
496 | 137161c9 | Michael Hanselmann | for idx, val in enumerate(row): |
497 | 137161c9 | Michael Hanselmann | if fields[idx] in unitfields: |
498 | 137161c9 | Michael Hanselmann | try:
|
499 | 137161c9 | Michael Hanselmann | val = int(val)
|
500 | 137161c9 | Michael Hanselmann | except ValueError: |
501 | 137161c9 | Michael Hanselmann | pass
|
502 | 137161c9 | Michael Hanselmann | else:
|
503 | 137161c9 | Michael Hanselmann | val = row[idx] = utils.FormatUnit(val) |
504 | 137161c9 | Michael Hanselmann | if separator is None: |
505 | 137161c9 | Michael Hanselmann | mlens[idx] = max(mlens[idx], len(val)) |
506 | 137161c9 | Michael Hanselmann | |
507 | 16be8703 | Iustin Pop | result = [] |
508 | 137161c9 | Michael Hanselmann | if headers:
|
509 | 137161c9 | Michael Hanselmann | args = [] |
510 | 137161c9 | Michael Hanselmann | for idx, name in enumerate(fields): |
511 | 137161c9 | Michael Hanselmann | hdr = headers[name] |
512 | 137161c9 | Michael Hanselmann | if separator is None: |
513 | 137161c9 | Michael Hanselmann | mlens[idx] = max(mlens[idx], len(hdr)) |
514 | 137161c9 | Michael Hanselmann | args.append(mlens[idx]) |
515 | 137161c9 | Michael Hanselmann | args.append(hdr) |
516 | 16be8703 | Iustin Pop | result.append(format % tuple(args))
|
517 | 137161c9 | Michael Hanselmann | |
518 | 137161c9 | Michael Hanselmann | for line in data: |
519 | 137161c9 | Michael Hanselmann | args = [] |
520 | 137161c9 | Michael Hanselmann | for idx in xrange(len(fields)): |
521 | 137161c9 | Michael Hanselmann | if separator is None: |
522 | 137161c9 | Michael Hanselmann | args.append(mlens[idx]) |
523 | 137161c9 | Michael Hanselmann | args.append(line[idx]) |
524 | 16be8703 | Iustin Pop | result.append(format % tuple(args))
|
525 | 16be8703 | Iustin Pop | |
526 | 16be8703 | Iustin Pop | return result |