Add a nodefreshen command

This aims to provide the same shortcuts as 'updatenode'

confluent_client/bin/nodefreshen

@@ -0,0 +1,166 @@
+#!/usr/bin/python3
+# 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 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.sortutil as sortutil
+devnull = None
+
+def run():
+    global devnull
+    devnull = open(os.devnull, 'rb')
+    argparser = optparse.OptionParser(
+        usage="Usage: %prog [options] noderange commandexpression",
+        epilog="Expressions are the same as in attributes, e.g. "
+               "'ipmitool -H {hardwaremanagement.manager}' will be expanded.")
+    argparser.add_option('-f', '-c', '--count', type='int', default=168,
+                         help='Number of commands to run at a time')
+    argparser.add_option('-k', '--security', action='store_true',
+                         help='Update SSH setup')
+    argparser.add_option('-F', '--sync', action='store_true',
+                         help='Run the syncfiles associated with the currently completed OS profile on the noderange')
+    argparser.add_option('-P', '--scripts',
+                         help='Re-run specified scripts, with full path under scripts, e.g. post.d/first,firstboot.d/second')
+    argparser.add_option('-m', '--maxnodes', type='int',
+                    help='Specify a maximum number of '
+                        'nodes to run remote ssh command to, '
+                        'prompting if over the threshold')
+    # 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) < 1:
+        argparser.print_help()
+        sys.exit(1)
+    client.check_globbing(args[0])
+    concurrentprocs = options.count
+    c = client.Command()
+
+    currprocs = 0
+    all = set([])
+    pipedesc = {}
+    pendingexecs = deque()
+    exitcode = 0
+
+    c.stop_if_noderange_over(args[0], options.maxnodes)
+    nodemap = {}
+    cmdparms = []
+    nodes = []
+    for res in c.read('/noderange/{0}/nodes/'.format(args[0])):
+        if 'error' in res:
+            sys.stderr.write(res['error'] + '\n')
+            exitcode |= res.get('errorcode', 1)
+            break
+        node = res['item']['href'][:-1]
+        nodes.append(node)
+    
+    cmdstorun = []
+    if options.security:
+        cmdstorun.append(['run_remote', 'setupssh'])
+    if options.sync:
+        cmdstorun.append(['run_remote_python', 'syncfileclient'])
+    if options.scripts:
+        for script in options.scripts.split(','):
+            cmdstorun.append(['run_remote', script])
+    if not cmdstorun:
+        argparser.print_help()
+        sys.exit(1)
+    idxbynode = {}
+    cmdvbase = ['bash', '/etc/confluent/functions']
+    for sshnode in nodes:
+        idxbynode[sshnode] = 1
+        cmdv = ['ssh', sshnode] + cmdvbase + cmdstorun[0]
+        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)
+    while all:
+        pernodeout = {}
+        for r in rdy:
+            desc = pipedesc[r]
+            node = desc['node']
+            data = True
+            while data and select.select([r], [], [], 0)[0]:
+                data = r.readline()
+                if data:
+                    if desc['type'] == 'stdout':
+                        if node not in pernodeout:
+                            pernodeout[node] = []
+                        pernodeout[node].append(data)
+                    else:
+                        data = client.stringify(data)
+                        sys.stderr.write('{0}: {1}'.format(node, data))
+                        sys.stderr.flush()
+                else:
+                    pop = desc['popen']
+                    ret = pop.poll()
+                    if ret is not None:
+                        exitcode = exitcode | ret
+                        all.discard(r)
+                        r.close()
+                        if desc['type'] == 'stdout':
+                            if idxbynode[node] < len(cmdstorun):
+                                cmdv =  ['ssh', sshnode] + cmdvbase + cmdstorun[idxbynode[node]]
+                                idxbynode[node] += 1
+                                run_cmdv(node, cmdv, all, pipedesc)
+                            elif pendingexecs:
+                                node, cmdv = pendingexecs.popleft()
+                                run_cmdv(node, cmdv, all, pipedesc)
+        for node in sortutil.natural_sort(pernodeout):
+            for line in pernodeout[node]:
+                line = client.stringify(line)
+                line = line.lstrip('\x08')
+                sys.stdout.write('{0}: {1}'.format(node, line))
+        sys.stdout.flush()
+        if all:
+            rdy, _, _ = select.select(all, [], [], 10)
+    sys.exit(exitcode)
+
+
+def run_cmdv(node, cmdv, all, pipedesc):
+    nopen = subprocess.Popen(
+        cmdv, stdin=devnull, 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()