Add nodersync

This provides bulk transfer with status to a noderange.

confluent_client/bin/nodersync

@@ -0,0 +1,153 @@
+#!/usr/bin/env python
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2016-2017 Lenovo
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from collections import deque
+import optparse
+import os
+import select
+import shlex
+import signal
+import subprocess
+import sys
+
+try:
+    signal.signal(signal.SIGPIPE, signal.SIG_DFL)
+except AttributeError:
+    pass
+path = os.path.dirname(os.path.realpath(__file__))
+path = os.path.realpath(os.path.join(path, '..', 'lib', 'python'))
+if path.startswith('/opt'):
+    sys.path.append(path)
+
+import confluent.client as client
+import confluent.screensqueeze as sq
+import confluent.sortutil as sortutil
+
+
+def run():
+    argparser = optparse.OptionParser(
+        usage="Usage: %prog location noderange:location",
+    )
+    argparser.add_option('-f', '-c', '--count', type='int', default=168,
+                         help='Number of nodes to concurrently rsync')
+    # among other things, FD_SETSIZE limits.  Besides, spawning too many
+    # processes can be unkind for the unaware on memory pressure and such...
+    argparser.disable_interspersed_args()
+    (options, args) = argparser.parse_args()
+    if len(args) < 2 or ':' not in args[-1]:
+        argparser.print_help()
+        sys.exit(1)
+    concurrentprocs = options.count
+    noderange, targpath = args[-1].split(':', 1)
+    client.check_globbing(noderange)
+    c = client.Command()
+    cmdstr = " ".join(args[:-1])
+    cmdstr = 'rsync -av --info=progress2 ' + cmdstr
+    cmdstr += ' {node}:' + targpath
+
+    currprocs = 0
+    all = set([])
+    pipedesc = {}
+    pendingexecs = deque()
+    exitcode = 0
+
+    for exp in c.create('/noderange/{0}/attributes/expression'.format(noderange),
+                        {'expression': cmdstr}):
+        if 'error' in exp:
+            sys.stderr.write(exp['error'] + '\n')
+            exitcode |= exp.get('errorcode', 1)
+        ex = exp.get('databynode', ())
+        for node in ex:
+            cmd = ex[node]['value'].encode('utf-8')
+            cmdv = shlex.split(cmd)
+            if currprocs < concurrentprocs:
+                currprocs += 1
+                run_cmdv(node, cmdv, all, pipedesc)
+            else:
+                pendingexecs.append((node, cmdv))
+    if not all or exitcode:
+        sys.exit(exitcode)
+    rdy, _, _ = select.select(all, [], [], 10)
+    nodeerrs = {}
+    pernodeout = {}
+    pernodefile = {}
+    output = sq.ScreenPrinter(noderange, c)
+
+    while all:
+        for r in rdy:
+            desc = pipedesc[r]
+            node = desc['node']
+            data = True
+            while data and select.select([r], [], [], 0)[0]:
+                data = r.read(1)
+                if data:
+                    if desc['type'] == 'stdout':
+                        if node not in pernodeout:
+                            pernodeout[node] = ''
+                        pernodeout[node] += data
+                        if '\n' in pernodeout[node]:
+                            currout, pernodeout[node] = pernodeout[node].split('\n', 1)
+                            if currout:
+                                pernodefile[node] = os.path.basename(currout)
+                        if '\r' in pernodeout[node]:
+                            currout, pernodeout[node] = pernodeout[node].split('\r', 1)
+                            if currout:
+                                currout = currout.split()
+                                try:
+                                    currout = currout[1]
+                                    output.set_output(node, '{0}:{1}'.format(pernodefile[node], currout))
+                                except IndexError:
+                                    pernodefile = currout[0]
+                                    pass
+                    else:
+                        output.set_output(node, 'error!')
+                        if node not in nodeerrs:
+                            nodeerrs[node] = ''
+                        nodeerrs[node] += data
+                else:
+                    pop = desc['popen']
+                    ret = pop.poll()
+                    if ret is not None:
+                        exitcode = exitcode | ret
+                        all.discard(r)
+                        r.close()
+                        if node not in nodeerrs:
+                            output.set_output(node, 'complete')
+                        if desc['type'] == 'stdout' and pendingexecs:
+                            node, cmdv = pendingexecs.popleft()
+                            run_cmdv(node, cmdv, all, pipedesc)
+        if all:
+            rdy, _, _ = select.select(all, [], [], 10)
+    for node in nodeerrs:
+        for line in nodeerrs[node].split('\n'):
+            sys.stderr.write('{0}: {1}\n'.format(node, line))
+    sys.exit(exitcode)
+
+
+def run_cmdv(node, cmdv, all, pipedesc):
+    nopen = subprocess.Popen(
+        cmdv, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    pipedesc[nopen.stdout] = {'node': node, 'popen': nopen,
+                              'type': 'stdout'}
+    pipedesc[nopen.stderr] = {'node': node, 'popen': nopen,
+                              'type': 'stderr'}
+    all.add(nopen.stdout)
+    all.add(nopen.stderr)
+
+
+if __name__ == '__main__':
+    run()

confluent_client/confluent/screensqueeze.py

@@ -44,6 +44,8 @@ class ScreenPrinter(object):
         self.fieldwidth = maxlen + textlen + 1  # 1 for column
 
     def set_output(self, node, text):
+        if self.nodeoutput[node] == text:
+            return
         self.nodeoutput[node] = text
         if len(text) >= self.textlen:
             self.textlen = len(text) + 1