Now that I've moved to multiple app servers, gotta log multiple server logs. Rtail to the rescue.

utils/rtail.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+
+"""
+Usage:
+
+  ./rtail.py user@host:path/foo.log bar.log host2:/path/baz.log
+"""
+
+import optparse
+import os
+import re
+import select
+import subprocess
+import sys
+
+
+def main():
+    op = optparse.OptionParser()
+    options, args = op.parse_args()
+    streams = list()
+    for arg in args:
+        if re.match(r"^(.+@)?[a-zA-Z0-9.-]+:.+", arg):
+            # this is a remote location
+            hostname, path = arg.split(":", 1)
+            s = subprocess.Popen(["ssh", hostname, "tail -f " + path], stdout=subprocess.PIPE)
+            s.name = arg
+            streams.append(s)
+        else:
+            s = subprocess.Popen(["tail", "-f", arg], stdout=subprocess.PIPE)
+            s.name = arg
+            streams.append(s)
+
+    try:
+        while True:
+            r, _, _ = select.select(
+                [stream.stdout.fileno() for stream in streams], [], [])
+            for fileno in r:
+                for stream in streams:
+                    if stream.stdout.fileno() != fileno:
+                        continue
+                    data = os.read(fileno, 4096)
+                    if not data:
+                        streams.remove(stream)
+                        break
+                    host = re.match(r'^(.*?)\.', stream.name)
+                    combination_message = "[%s] %s" % (host.group(1), data)
+                    sys.stdout.write(combination_message)
+                    break
+    except KeyboardInterrupt:
+        print " --- End of Logging ---"
+
+if __name__ == "__main__":
+    main()