updated wallet_server_monitor to update slack

lbry/scripts/wallet_server_monitor.py

@@ -1,5 +1,6 @@
 import sys
 import json
+import random
 import asyncio
 import argparse
 from datetime import datetime
@@ -7,10 +8,11 @@ from datetime import datetime
 try:
     import aiohttp
     import psycopg2
+    import slack
 except ImportError:
-    print(f"To run {sys.argv[0]} you need to install aiohttp and psycopg2:")
+    print(f"To run {sys.argv[0]} you need to install aiohttp, psycopg2 and slackclient:")
     print(f"")
-    print(f"  $ pip install aiohttp psycopg2")
+    print(f"  $ pip install aiohttp psycopg2 slackclient")
     print("")
     sys.exit(1)
 
@@ -19,24 +21,12 @@ if not sys.version_info >= (3, 7):
     sys.exit(1)
 
 
-async def monitor(db, server):
+async def handle_analytics_event(cursor, event, server):
-    c = db.cursor()
+    cursor.execute("""
-    async with aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(10)) as session:
-        try:
-            ws = await session.ws_connect(server)
-        except (aiohttp.ClientConnectorError, asyncio.TimeoutError):
-            print(f"failed connecting to {server}")
-            return
-        print(f"connected to {server}")
-
-        async for msg in ws:
-            r = json.loads(msg.data)
-
-            c.execute("""
     INSERT INTO wallet_server_stats (server, sessions, event_time) VALUES (%s,%s,%s);
-            """, (server, r['status']['sessions'], datetime.now()))
+    """, (server, event['status']['sessions'], datetime.now()))
 
-            for command, stats in r["api"].items():
+    for command, stats in event["api"].items():
         data = {
             'server': server,
             'command': command,
@@ -59,18 +49,71 @@ async def monitor(db, server):
             else:
                 data[key] = value
 
-                c.execute(f"""
+        cursor.execute(f"""
         INSERT INTO wallet_server_command_stats ({','.join(data)})
         VALUES ({','.join('%s' for _ in data)});
         """, list(data.values()))
 
+
+async def boris_says(slackclient, what_boris_says):
+    if slackclient:
+        await slackclient.chat_postMessage(
+            username="boris the wallet monitor",
+            icon_emoji=":boris:",
+            channel='#tech-sdk',
+            text=what_boris_says
+        )
+
+
+async def monitor(db, server, slackclient):
+    c = db.cursor()
+    delay = 30
+    first_attempt = True
+    while True:
+        try:
+            async with aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(10)) as session:
+                try:
+                    ws = await session.ws_connect(server)
+                except (aiohttp.ClientConnectorError, asyncio.TimeoutError):
+                    if first_attempt:
+                        print(f"failed connecting to {server}")
+                        await boris_says(slackclient, random.choice([
+                            f"{server} is not responding, probably dead, will not connect again.",
+                        ]))
+                        return
+                    raise
+
+                if first_attempt:
+                    await boris_says(slackclient, f"{server} is online")
+                else:
+                    await boris_says(slackclient, f"{server} is back online")
+
+                delay = 30
+                first_attempt = False
+                print(f"connected to {server}")
+
+                async for msg in ws:
+                    await handle_analytics_event(c, json.loads(msg.data), server)
                     db.commit()
 
+        except (aiohttp.ClientConnectorError, asyncio.TimeoutError):
+            await boris_says(slackclient, random.choice([
+                f"Guys, we have a problem! Nobody home at {server}. Will check on it again in {delay} seconds."
+                f"Something wrong with {server}. I think dead. Will poke it again in {delay} seconds.",
+                f"Don't hear anything from {server}, maybe dead. Will try it again in {delay} seconds."
+            ]))
+            await asyncio.sleep(delay)
+            delay += 30
 
-async def main(dsn, servers):
+
+async def main(dsn, servers, slackclient):
     db = ensure_database(dsn)
+    await boris_says(slackclient, random.choice([
+        "No fear, Boris is here! I will monitor the servers now and will try not to fall asleep again.",
+        "Comrad the Cat and Boris are here now, monitoring wallet servers.",
+    ]))
     await asyncio.gather(*(
-        asyncio.create_task(monitor(db, server))
+        asyncio.create_task(monitor(db, server, slackclient))
         for server in servers
     ))
 
@@ -199,6 +242,11 @@ def get_servers(args):
     ]
 
 
+def get_slack_client(args):
+    if args.slack_token:
+        return slack.WebClient(token=args.slack_token, run_async=True)
+
+
 def get_args():
     parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
     parser.add_argument("--pg-dbname", default="analytics", help="PostgreSQL database name")
@@ -208,9 +256,21 @@ def get_args():
     parser.add_argument("--pg-port", default="5432", help="PostgreSQL port")
     parser.add_argument("--server-url", default="http://spv{}.lbry.com:50005", help="URL with '{}' placeholder")
     parser.add_argument("--server-range", default="1..5", help="Range of numbers or single number to use in URL placeholder")
+    parser.add_argument("--slack-token")
     return parser.parse_args()
 
 
 if __name__ == "__main__":
+    loop = asyncio.get_event_loop()
     args = get_args()
-    asyncio.run(main(get_dsn(args), get_servers(args)))
+    slackclient = get_slack_client(args)
+    try:
+        loop.run_until_complete(main(get_dsn(args), get_servers(args), slackclient))
+    finally:
+        loop.run_until_complete(
+            boris_says(slackclient, random.choice([
+                "Wallet servers will have to watch themselves, I'm leaving now.",
+                "I'm going to go take a nap, hopefully nothing blows up while I'm gone.",
+                "Babushka is calling, I'll be back later, someone else watch the servers while I'm gone.",
+            ]))
+        )