Move default autobackup config to pvc.conf

Ensures that messages are fully read before each append. Adds more
Zookeeper hits, but ensures logs won't be overwritten by multiple
daemons.

Also don't use a set on the client side, to avoid "removing duplicate"
entries erroneously.

build-and-deploy.sh

@@ -46,14 +46,20 @@ $SUDO dpkg -i ../pvc-client*_${version}*.deb &>/dev/null
 echo " done".
 
 for HOST in ${HOSTS[@]}; do
-    echo "> Deploying packages to host ${HOST}"
-    echo -n "Copying packages..."
+    echo -n "Copying packages to host ${HOST}..."
     ssh $HOST $SUDO rm -rf /tmp/pvc &>/dev/null
     ssh $HOST mkdir /tmp/pvc &>/dev/null
     scp ../pvc-*_${version}*.deb $HOST:/tmp/pvc/ &>/dev/null
     echo " done."
+done
+if [[ -z ${KEEP_ARTIFACTS} ]]; then
+    rm ../pvc*_${version}*
+fi
+
+for HOST in ${HOSTS[@]}; do
+    echo "> Deploying packages to host ${HOST}"
     echo -n "Installing packages..."
-    ssh $HOST $SUDO dpkg -i /tmp/pvc/{pvc-client-cli,pvc-daemon-common,pvc-daemon-api,pvc-daemon-node}*.deb &>/dev/null
+    ssh $HOST $SUDO dpkg -i /tmp/pvc/*.deb &>/dev/null
     ssh $HOST rm -rf /tmp/pvc &>/dev/null
     echo " done."
     echo -n "Restarting PVC daemons..."
@@ -68,8 +74,5 @@ for HOST in ${HOSTS[@]}; do
     done
     echo " done."
 done
-if [[ -z ${KEEP_ARTIFACTS} ]]; then
-    rm ../pvc*_${version}*
-fi
 
 popd &>/dev/null

client-cli/pvc/cli/helpers.py

@@ -44,7 +44,7 @@ DEFAULT_STORE_DATA = {"cfgfile": "/etc/pvc/pvcapid.yaml"}
 DEFAULT_STORE_FILENAME = "pvc.json"
 DEFAULT_API_PREFIX = "/api/v1"
 DEFAULT_NODE_HOSTNAME = gethostname().split(".")[0]
-DEFAULT_AUTOBACKUP_FILENAME = "/etc/pvc/autobackup.yaml"
+DEFAULT_AUTOBACKUP_FILENAME = "/etc/pvc/pvc.conf"
 MAX_CONTENT_WIDTH = 120
 
 

client-cli/pvc/lib/node.py

@@ -21,6 +21,8 @@
 
 import time
 
+from collections import deque
+
 import pvc.lib.ansiprint as ansiprint
 from pvc.lib.common import call_api
 
@@ -107,7 +109,9 @@ def follow_node_log(config, node, lines=10):
     API schema: {"name":"{nodename}","data":"{node_log}"}
     """
     # We always grab 200 to match the follow call, but only _show_ `lines` number
-    params = {"lines": 200}
+    max_lines = 200
+
+    params = {"lines": max_lines}
     response = call_api(
         config, "get", "/node/{node}/log".format(node=node), params=params
     )
@@ -117,43 +121,50 @@ def follow_node_log(config, node, lines=10):
 
     # Shrink the log buffer to length lines
     node_log = response.json()["data"]
-    shrunk_log = node_log.split("\n")[-int(lines) :]
-    loglines = "\n".join(shrunk_log)
+    full_log = node_log.split("\n")
+    shrunk_log = full_log[-int(lines) :]
 
     # Print the initial data and begin following
-    print(loglines, end="")
-    print("\n", end="")
+    for line in shrunk_log:
+        print(line)
+
+    # Create the deque we'll use to buffer loglines
+    loglines = deque(full_log, max_lines)
 
     while True:
+        # Wait half a second
+        time.sleep(0.5)
+
         # Grab the next line set (200 is a reasonable number of lines per half-second; any more are skipped)
         try:
-            params = {"lines": 200}
+            params = {"lines": max_lines}
             response = call_api(
                 config, "get", "/node/{node}/log".format(node=node), params=params
             )
             new_node_log = response.json()["data"]
         except Exception:
             break
+
         # Split the new and old log strings into constitutent lines
-        old_node_loglines = node_log.split("\n")
         new_node_loglines = new_node_log.split("\n")
 
-        # Set the node log to the new log value for the next iteration
-        node_log = new_node_log
+        # Find where in the new lines the last entryin the ongoing deque is
+        start_idx = 0
+        for idx, line in enumerate(new_node_loglines):
+            if line == loglines[-1]:
+                start_idx = idx
 
-        # Get the difference between the two sets of lines
-        old_node_loglines_set = set(old_node_loglines)
-        diff_node_loglines = [
-            x for x in new_node_loglines if x not in old_node_loglines_set
-        ]
+        # Get the new lines starting from the found index plus one
+        diff_node_loglines = new_node_loglines[start_idx + 1 :]
 
-        # If there's a difference, print it out
+        # If there's a difference, add the lines to the ongling deque and print then out
         if len(diff_node_loglines) > 0:
-            print("\n".join(diff_node_loglines), end="")
-            print("\n", end="")
+            for line in diff_node_loglines:
+                loglines.append(line)
+                print(line)
 
-        # Wait half a second
-        time.sleep(0.5)
+        del new_node_loglines
+        del diff_node_loglines
 
     return True, ""
 

daemon-common/log.py

@@ -76,7 +76,9 @@ class Logger(object):
         self.config = config
 
         if self.config["file_logging"]:
-            self.logfile = self.config["log_directory"] + "/pvc.log"
+            self.logfile = (
+                self.config["log_directory"] + "/" + self.config["daemon_name"] + ".log"
+            )
             # We open the logfile for the duration of our session, but have a hup function
             self.writer = open(self.logfile, "a", buffering=0)
 
@@ -98,7 +100,7 @@ class Logger(object):
         if self.config["file_logging"]:
             self.writer.close()
         if self.config["zookeeper_logging"]:
-            self.out("Waiting 15s for Zookeeper message queue to drain", state="s")
+            self.out("Waiting for Zookeeper message queue to drain", state="s")
 
             tick_count = 0
             while not self.zookeeper_queue.empty():
@@ -139,20 +141,25 @@ class Logger(object):
         if prefix != "":
             prefix = prefix + " - "
 
-        # Assemble message string
-        message = colour + prompt + endc + date + prefix + message
-
         # Log to stdout
         if self.config["stdout_logging"]:
-            print(message)
+            # Assemble output string
+            output = colour + prompt + endc + date + prefix + message
+            print(output)
 
         # Log to file
         if self.config["file_logging"]:
-            self.writer.write(message + "\n")
+            # Assemble output string
+            output = colour + prompt + endc + date + prefix + message
+            self.writer.write(output + "\n")
 
         # Log to Zookeeper
         if self.config["zookeeper_logging"]:
-            self.zookeeper_queue.put(message)
+            # Set the daemon value (only used here as others do not overlap with different daemons)
+            daemon = f"{self.config['daemon_name']}: "
+            # Assemble output string
+            output = daemon + colour + prompt + endc + date + prefix + message
+            self.zookeeper_queue.put(output)
 
         # Set last message variables
         self.last_colour = colour
@@ -198,16 +205,9 @@ class ZookeeperLogger(Thread):
         self.zkhandler.write([("base.logs", ""), (("logs", self.node), "")])
 
     def run(self):
-        while not self.connected:
         self.start_zkhandler()
-            sleep(1)
-
         self.running = True
-        # Get the logs that are currently in Zookeeper and populate our deque
-        raw_logs = self.zkhandler.read(("logs.messages", self.node))
-        if raw_logs is None:
-            raw_logs = ""
-        logs = deque(raw_logs.split("\n"), self.max_lines)
+
         while self.running:
             # Get a new message
             try:
@@ -222,25 +222,26 @@ class ZookeeperLogger(Thread):
                 date = "{} ".format(datetime.now().strftime("%Y/%m/%d %H:%M:%S.%f"))
             else:
                 date = ""
+
+            try:
+                with self.zkhandler.writelock(("logs.messages", self.node)):
+                    # Get the logs that are currently in Zookeeper and populate our deque
+                    cur_logs = self.zkhandler.read(("logs.messages", self.node))
+                    if cur_logs is None:
+                        cur_logs = ""
+
+                    logs = deque(cur_logs.split("\n"), self.max_lines - 1)
+
                     # Add the message to the deque
                     logs.append(f"{date}{message}")
 
-            tick_count = 0
-            while True:
-                try:
                     # Write the updated messages into Zookeeper
                     self.zkhandler.write(
                         [(("logs.messages", self.node), "\n".join(logs))]
                     )
-                    break
             except Exception:
-                    # The write failed (connection loss, etc.) so retry for 15 seconds
-                    sleep(0.5)
-                    tick_count += 1
-                    if tick_count > 30:
-                        break
-                    else:
                 continue
+
         return
 
     def stop(self):

debian/control

@@ -9,7 +9,7 @@ X-Python3-Version: >= 3.2
 Package: pvc-daemon-node
 Architecture: all
 Depends: systemd, pvc-daemon-common, python3-kazoo, python3-psutil, python3-apscheduler, python3-libvirt, python3-psycopg2, python3-dnspython, python3-yaml, python3-distutils, python3-rados, python3-gevent, ipmitool, libvirt-daemon-system, arping, vlan, bridge-utils, dnsmasq, nftables, pdns-server, pdns-backend-pgsql
-Description: Parallel Virtual Cluster node daemon (Python 3)
+Description: Parallel Virtual Cluster node daemon
  A KVM/Zookeeper/Ceph-based VM and private cloud manager
  .
  This package installs the PVC node daemon
@@ -17,7 +17,7 @@ Description: Parallel Virtual Cluster node daemon (Python 3)
 Package: pvc-daemon-api
 Architecture: all
 Depends: systemd, pvc-daemon-common, python3-yaml, python3-flask, python3-flask-restful, python3-celery, python-celery-common, python3-distutils, python3-redis, python3-lxml, python3-flask-migrate, fio
-Description: Parallel Virtual Cluster API daemon (Python 3)
+Description: Parallel Virtual Cluster API daemon
  A KVM/Zookeeper/Ceph-based VM and private cloud manager
  .
  This package installs the PVC API daemon
@@ -25,7 +25,7 @@ Description: Parallel Virtual Cluster API daemon (Python 3)
 Package: pvc-daemon-common
 Architecture: all
 Depends: python3-kazoo, python3-psutil, python3-click, python3-lxml
-Description: Parallel Virtual Cluster common libraries (Python 3)
+Description: Parallel Virtual Cluster common libraries
  A KVM/Zookeeper/Ceph-based VM and private cloud manager
  .
  This package installs the common libraries for the daemon and API
@@ -33,7 +33,7 @@ Description: Parallel Virtual Cluster common libraries (Python 3)
 Package: pvc-client-cli
 Architecture: all
 Depends: python3-requests, python3-requests-toolbelt, python3-yaml, python3-lxml, python3-click
-Description: Parallel Virtual Cluster CLI client (Python 3)
+Description: Parallel Virtual Cluster CLI client
  A KVM/Zookeeper/Ceph-based VM and private cloud manager
  .
  This package installs the PVC API command-line client

node-daemon/pvcnoded/Daemon.py

@@ -63,7 +63,8 @@ def entrypoint():
 
     # Get our configuration
     config = pvcnoded.util.config.get_configuration()
-    config["pvcnoded_version"] = version
+    config["daemon_name"] = "pvcnoded"
+    config["daemon_version"] = version
 
     # Create and validate our directories
     pvcnoded.util.config.validate_directories(config)

node-daemon/pvcnoded/util/zookeeper.py

@@ -123,7 +123,7 @@ def setup_node(logger, config, zkhandler):
                 ),
                 (
                     ("node.data.pvc_version", config["node_hostname"]),
-                    config["pvcnoded_version"],
+                    config["daemon_version"],
                 ),
                 (
                     ("node.ipmi.hostname", config["node_hostname"]),
@@ -159,7 +159,7 @@ def setup_node(logger, config, zkhandler):
                 ),
                 (
                     ("node.data.pvc_version", config["node_hostname"]),
-                    config["pvcnoded_version"],
+                    config["daemon_version"],
                 ),
                 (
                     ("node.ipmi.hostname", config["node_hostname"]),