Pipfile

@@ -17,11 +17,11 @@ lazy-object-proxy = "==1.4.3"
 MarkupSafe = "==1.1.1"
 mccabe = "==0.6.1"
 nanoid = "==2.0.0"
-psycopg2 = "==2.8.5"
+psycopg = "==3.1.14"
+psycopg_pool = "==3.2.0"
 pylint = "==2.5.2"
 six = "==1.14.0"
 toml = "==0.10.0"
-typed-ast = "==1.4.1"
 Werkzeug = "==1.0.1"
 wrapt = "==1.12.1"
 stripe = "*"

README.md

@@ -28,11 +28,18 @@ pipenv run flask run
 ```
 
 ```
+
 # these are some notes I kept related to pipenv troubleshooting:
 python3 -m pip uninstall pipenv
 python3 -m pip uninstall virtualenv
 python3 -m pip install pipenv
 python3 -m pipenv install
+
+...
+
+apt get install python3.11 python3.11-distutils
+pipenv --venv 
+pipenv --rm
 ```
 
 Interested in learning more? How about a trip to the the `docs/` folder:

capsulflask/cli.py

@@ -8,7 +8,6 @@ import click
 from flask.cli import with_appcontext
 from flask import Blueprint
 from flask import current_app
-from psycopg2 import ProgrammingError
 from flask_mail import Message
 
 from capsulflask.db import get_model

capsulflask/db.py

@@ -1,9 +1,9 @@
-import psycopg2
+import psycopg
+import psycopg_pool
 import re
 import sys
 from os import listdir
 from os.path import isfile, join
-from psycopg2 import pool
 from flask import current_app
 from flask import g
 
@@ -13,10 +13,10 @@ from capsulflask.shared import my_exec_info_message
 def init_app(app, is_running_server):
 
   try:
-    app.config['PSYCOPG2_CONNECTION_POOL'] = psycopg2.pool.SimpleConnectionPool(
+    app.config['PSYCOPG_CONNECTION_POOL'] = psycopg_pool.ConnectionPool(
-      1,
+      conninfo=app.config['POSTGRES_CONNECTION_PARAMETERS'],
-      20,
+      min_size=1,
-      app.config['POSTGRES_CONNECTION_PARAMETERS']
+      max_size=20
     )
   except:
     app.logger.error(f"""
@@ -45,7 +45,7 @@ def init_app(app, is_running_server):
     with open(join(schemaMigrationsPath, filename), 'rb') as file:
       schemaMigrations[key] = file.read().decode("utf8")
 
-  connection = app.config['PSYCOPG2_CONNECTION_POOL'].getconn()
+  connection = app.config['PSYCOPG_CONNECTION_POOL'].getconn()
 
   hasSchemaVersionTable = False
   actionWasTaken = False
@@ -119,7 +119,7 @@ def init_app(app, is_running_server):
 
   cursor.close()
   
-  app.config['PSYCOPG2_CONNECTION_POOL'].putconn(connection)
+  app.config['PSYCOPG_CONNECTION_POOL'].putconn(connection)
 
   app.logger.info("{} current schemaVersion: \"{}\"".format(
     ("schema migration completed." if actionWasTaken else "schema is already up to date. "), schemaVersion
@@ -130,7 +130,7 @@ def init_app(app, is_running_server):
 
 def get_model() -> DBModel:
     if 'db_model' not in g:
-        connection = current_app.config['PSYCOPG2_CONNECTION_POOL'].getconn()
+        connection = current_app.config['PSYCOPG_CONNECTION_POOL'].getconn()
         cursor = connection.cursor()
         g.db_model = DBModel(connection, cursor)
     return g.db_model
@@ -141,5 +141,5 @@ def close_db(e=None):
 
   if db_model is not None:
     db_model.cursor.close()
-    current_app.config['PSYCOPG2_CONNECTION_POOL'].putconn(db_model.connection)
+    current_app.config['PSYCOPG_CONNECTION_POOL'].putconn(db_model.connection)
 

capsulflask/db_model.py

@@ -1,8 +1,7 @@
 
 import re
 
-# I was never able to get this type hinting to work correctly 
+import psycopg
-# from psycopg2.extensions import connection as Psycopg2Connection, cursor as Psycopg2Cursor
 from nanoid import generate
 from flask import current_app
 from typing import List
@@ -11,8 +10,7 @@ from capsulflask.shared import OnlineHost
 
 
 class DBModel:
-  #def __init__(self, connection: Psycopg2Connection, cursor: Psycopg2Cursor):
+  def __init__(self, connection: psycopg.Connection, cursor: psycopg.Cursor):
-  def __init__(self, connection, cursor):
     self.connection = connection
     self.cursor = cursor
 
@@ -67,7 +65,7 @@ class DBModel:
         raise ValueError(f"host_id \"{host_id}\" must match \"^[a-zA-Z0-9_-]+\"")
 
       # I kept getting "TypeError: not all arguments converted during string formatting"
-      # when I was trying to mix python string templating with psycopg2 safe parameter passing. 
+      # when I was trying to mix python string templating with psycopg safe parameter passing. 
       # so i just did all of it in python and check the user-provided data for safety myself (no sql injection).
       self.cursor.execute(f"{query} AND host = '{host_id}'")
 
@@ -360,7 +358,7 @@ class DBModel:
         raise ValueError(f"host_id \"{host_id}\" must match \"^[a-zA-Z0-9_-]+\"")
 
       # I kept getting "TypeError: not all arguments converted during string formatting"
-      # when I was trying to mix python query string templating with psycopg2 safe parameter passing. 
+      # when I was trying to mix python query string templating with psycopg safe parameter passing. 
       # so i just did all of it in python and check the user-provided data for safety myself (no sql injection).
       self.cursor.execute(f"{query} WHERE hosts.id = '{host_id}'")
 
@@ -482,26 +480,22 @@ class DBModel:
       return None
 
   def claim_operation(self, operation_id: int, host_id: str) -> bool:
-    # have to make a new cursor to set isolation level
+    
-    # cursor = self.connection.cursor()
+    # https://www.psycopg.org/psycopg3/docs/basic/transactions.html#transaction-contexts
-    # self.cursor.execute("SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;")
+    with self.connection.transaction():
-    # psycopg2.errors.ActiveSqlTransaction: SET TRANSACTION ISOLATION LEVEL must be called before any query
+      self.cursor.execute("""
-    self.cursor.execute("""
+        UPDATE host_operation SET assignment_status = 'assigned' 
-      BEGIN TRANSACTION;
+          WHERE host = %s AND operation = %s AND operation != (
-      UPDATE host_operation SET assignment_status = 'assigned' 
+            SELECT COALESCE(
-        WHERE host = %s AND operation = %s AND operation != (
+              (SELECT operation FROM host_operation WHERE operation = %s AND assignment_status = 'assigned'),
-          SELECT COALESCE(
+              -1
-            (SELECT operation FROM host_operation WHERE operation = %s AND assignment_status = 'assigned'),
+            ) as already_assigned_operation_id
-            -1
+          );
-          ) as already_assigned_operation_id
+      """,  (host_id, operation_id, operation_id))
-        );
+      to_return = self.cursor.rowcount != 0
-      COMMIT TRANSACTION;
-    """,  (host_id, operation_id, operation_id))
 
-    to_return = self.cursor.rowcount != 0
+    # COMMIT is executed at the end of the block.
-
+    # The connection is in idle state again.
-    self.connection.commit()
-    #cursor.close()
 
     return to_return
       
@@ -510,5 +504,6 @@ class DBModel:
 
 
   def set_broadcast_message(self, message):
-    self.cursor.execute("DELETE FROM broadcast_message; INSERT INTO broadcast_message (message) VALUES (%s)", (message, ))
+    self.cursor.execute("DELETE FROM broadcast_message")
+    self.cursor.execute("INSERT INTO broadcast_message (message) VALUES (%s)", (message, ))
     self.connection.commit()

capsulflask/hub_api.py

@@ -165,7 +165,7 @@ def can_claim_create(payload, host_id) -> (str, str):
   # hard-code the network name and IP for now until we can implement https://git.cyberia.club/cyberia/capsul-flask/issues/11
   # enable static IP -> capsul mapping via libvirt (manage MAC addresses)
 
-  payload["network_name"] = 'public3'
+  payload["network_name"] = 'public4'
   payload["public_ipv4"] = ""
 
   return payload, ""

capsulflask/landing.py

@@ -1,6 +1,7 @@
 from flask import Blueprint
 from flask import render_template
 from flask import current_app
+from flask import make_response
 
 from capsulflask.db import get_model
 
@@ -8,7 +9,9 @@ bp = Blueprint("landing", __name__, url_prefix="/")
 
 @bp.route("/")
 def index():
-  return render_template("index.html")
+  resp = make_response(render_template("index.html"), 200)
+  resp.headers['Cache-Control'] = 'no-cache'
+  return resp
 
 @bp.route("/pricing")
 def pricing():

capsulflask/metrics.py

@@ -87,11 +87,11 @@ def get_plot_bytes(metric, capsulid, duration, size):
 
   # Prometheus queries to pull metrics for VMs
   metric_queries = dict(
-    cpu=f"irate(libvirtd_domain_info_cpu_time_seconds_total{{domain='{capsulid}'}}[30s])",
+    cpu=f"irate(libvirt_domain_info_cpu_time_seconds_total{{domain='{capsulid}'}}[30s])",
-    memory=f"libvirtd_domain_info_maximum_memory_bytes{{domain='{capsulid}'}}-libvirtd_domain_info_memory_unused_bytes{{domain='{capsulid}'}}",
+    memory=f"libvirt_domain_info_maximum_memory_bytes{{domain='{capsulid}'}}-libvirtd_domain_info_memory_unused_bytes{{domain='{capsulid}'}}",
-    network_in=f"rate(libvirtd_domain_interface_stats_receive_bytes_total{{domain='{capsulid}'}}[{interval_seconds}s])",
+    network_in=f"rate(libvirt_domain_interface_stats_receive_bytes_total{{domain='{capsulid}'}}[{interval_seconds}s])",
-    network_out=f"rate(libvirtd_domain_interface_stats_transmit_bytes_total{{domain='{capsulid}'}}[{interval_seconds}s])",
+    network_out=f"rate(libvirt_domain_interface_stats_transmit_bytes_total{{domain='{capsulid}'}}[{interval_seconds}s])",
-    disk=f"rate(libvirtd_domain_block_stats_read_bytes_total{{domain='{capsulid}'}}[{interval_seconds}s])%2Brate(libvirtd_domain_block_stats_write_bytes_total{{domain='{capsulid}'}}[{interval_seconds}s])",
+    disk=f"rate(libvirt_domain_block_stats_read_bytes_total{{domain='{capsulid}'}}[{interval_seconds}s])%2Brate(libvirt_domain_block_stats_write_bytes_total{{domain='{capsulid}'}}[{interval_seconds}s])",
   )
 
   # These represent the top of the graph for graphs that are designed to be viewed at a glance.
@@ -112,8 +112,10 @@ def get_plot_bytes(metric, capsulid, duration, size):
   prometheus_range_url = f"{current_app.config['PROMETHEUS_URL']}/api/v1/query_range"
 
   #print(f"{prometheus_range_url}?query={metric_queries[metric]}&{range_and_interval}")
-
+  try:
-  prometheus_response = requests.get(f"{prometheus_range_url}?query={metric_queries[metric]}&{range_and_interval}")
+    prometheus_response = requests.get(f"{prometheus_range_url}?query={metric_queries[metric]}&{range_and_interval}")
+  except:
+    return (502, None)
   if prometheus_response.status_code >= 300:
     return (502, None)
 
@@ -145,7 +147,8 @@ def draw_plot_png_bytes(data, scale, size_x=3, size_y=1):
 
   #current_app.logger.info(json.dumps(data, indent=4, default=str))
 
-  pyplot.style.use("seaborn-dark")
+  # https://stackoverflow.com/questions/74716259/the-seaborn-styles-shipped-by-matplotlib-are-deprecated-since-3-6
+  pyplot.style.use("seaborn-v0_8-dark")
   fig, my_plot = pyplot.subplots(figsize=(size_x, size_y)) 
 
   # x=range(1, 15)
@@ -214,7 +217,7 @@ def draw_plot_png_bytes(data, scale, size_x=3, size_y=1):
 
   my_plot.fill_between( x, max_value, color=bg_color, alpha=0.13)
   my_plot.fill_between( x, y, color=highlight_color, alpha=0.3)
-  my_plot.plot(x, y, 'r-', color=highlight_color)
+  my_plot.plot(x, y, color=highlight_color)
 
   if size_y < 4:
     my_plot.set_yticks([0, scale])
@@ -257,4 +260,4 @@ def color_gradient(value):
   if value < 0.5:
     return lerp_rgb_tuples(green, blue, value*2)
   else:
-    return lerp_rgb_tuples(blue, red, (value-0.5)*2)
+    return lerp_rgb_tuples(blue, red, (value-0.5)*2)

capsulflask/shell_scripts/capacity-avaliable.sh

@@ -3,7 +3,12 @@
 # check available RAM and IPv4s
 
 ram_bytes_to_allocate="$1"
-ram_bytes_available=$(grep -E "^(size|memory_available_bytes)" /proc/spl/kstat/zfs/arcstats | awk '{sum+=$3} END {printf "%.0f", sum}')
+if [ -d /proc/spl/kstat/zfs ]; then
+  ram_bytes_available=$(grep -E "^(size|memory_available_bytes)" /proc/spl/kstat/zfs/arcstats | awk '{sum+=$3} END {printf "%.0f", sum}')
+else
+  ram_bytes_available=$(grep 'MemAvailable' /proc/meminfo | grep 'kB' | awk '{ printf "%.0f", $2*1000 }')
+fi
+
 ram_bytes_remainder="$((ram_bytes_available - ram_bytes_to_allocate))"
 
 if echo "$ram_bytes_to_allocate" | grep -vqE "^[0-9]+$"; then
@@ -20,11 +25,18 @@ if [ "$ram_bytes_remainder" -le $((20 * 1024 * 1024 * 1024)) ]; then
 fi
 
 ipv4_limit=61
-total_addresses_used=$(virsh net-dhcp-leases public3 | grep -E '.+' | tail -n +3 | wc -l)
+total_addresses_used=$(virsh net-dhcp-leases public4 | grep -E '.+' | tail -n +3 | wc -l)
 
 if [ "$total_addresses_used" -ge "$ipv4_limit" ]; then
   echo "IPv4 address limit reached"
   exit 1
 fi
 
+disk_kb_free="$(df -Bk | grep -E '/tank$' | awk '{ print $4 }' | sed -E 's/[kK]//')"
+if [ "$disk_kb_free" -le $((200 * 1024 * 1024)) ]; then
+  echo "VM is requesting disk when $(hostname -f) has only 200GB available."
+  exit 1
+fi
+
+
 echo "yes"

capsulflask/templates/base.html

@@ -39,7 +39,7 @@
   </div>
 </nav>
 {% for message in get_flashed_messages() %}
-  <div class="flash">{{ message }}</div>
+  <div class="flash green">{{ message }}</div>
 {% endfor %}
 {% block custom_flash %}{% endblock %}
 <main>

capsulflask/templates/changelog.html

@@ -8,6 +8,17 @@
 {% block subcontent %}
 <p>
  <ul>
+  <li>2024-02-11: EPIC emergency server migration 🤯 
+    <ul>
+      <li>Baikal (our old server) could no longer handle the load, was constantly crashing</li>
+      <li>Rathouse (our NEW server) was already racked up and ready to go</li>
+      <li>We wanted to wait until we could get Virtual Machine disk snapshots working on the new system before we migrated... but real life had other plans for us</li>
+      <li>We no longer have automatic backups. Sorry. We are working on it.</li>
+      <li>On the bright side, the new server is faster, has much more reliable disks, 
+        and they are configured in a way that should give you better performance.</li>
+      <li>Capsul was fully down for about a day and a half.</li>
+    </ul> 
+   </li>
    <li>2022-07-18: Add NixOS support</li>
    <li>2022-02-11: Added the <span class="code">/add-ssh-key-to-existing-capsul</span> page
     <ul>

capsulflask/templates/index.html

@@ -19,7 +19,7 @@
 <p>
  <ul>
    <li>Low friction: simply log in with your email address and fund your account with Credit/Debit or Cryptocurrency</li>
-   <li>All root disks are backed up at no charge</li>
+   <li><s>All root disks are backed up at no charge</s> This is being worked on</li>
    <li>All storage is fast, local, and solid-state</li>
    <li>All network connections are low latency</li>
    <li>Supported by amazing volunteers from Cyberia Computer Club</li>

docs/deployment.md

@@ -7,7 +7,7 @@ Capsul has a ["hub and spoke" architecture](./architecture.md). The "Hub" runs t
 On your spoke (see [Architecture](./architecture.md) You'll need `libvirtd`, `dnsmasq`, and `qemu-kvm`, plus a `/tank` diectory with some operating system images in it:
 
 ```
-sudo apt  install  --no-install-recommends   git dnsmasq qemu-system-x86 libvirt-clients libvirt-daemon-system  virtinst
+sudo apt  install  git dnsmasq qemu-system-x86 libvirt-clients libvirt-daemon-system  virtinst cloud-image-utils
 sudo mkdir -p /var/www /tank/{vm,img,config}
 sudo mkdir -p /tank/img/debian/10
 cd !$

docs/local-set-up.md

@@ -2,10 +2,10 @@
 
 ## <a name="manually"></a>Manually
 
-Ensure you have the pre-requisites for the psycopg2 Postgres database adapter package:
+Ensure you have the pre-requisites for the psycopg Postgres database adapter package:
 
 ```sh
-sudo apt install python3-dev libpq-dev
+sudo apt install gcc python3-dev libpq-dev
 pg_config --version
 ```
 
@@ -21,12 +21,29 @@ Create python virtual environment and install packages:
 pipenv install
 ```
 
-Run an instance of Postgres (I used docker for this, you can use whatever you want, point is its listening on `localhost:5432`):
+Install and configure Postgres:
 
 ```sh
-docker run --rm -it -e POSTGRES_PASSWORD=dev -p 5432:5432 postgres
+sudo apt install -y postgresql
+
+sudo -u postgres psql 
+psql (15.5 (Debian 15.5-0+deb12u1))
+Type "help" for help.
+
+postgres=# create database "capsul-flask";
+CREATE DATABASE
+postgres=# create user "capsul-flask" WITH PASSWORD 'blah';
+CREATE ROLE
+postgres=# alter database "capsul-flask" owner to "capsul-flask";
+ALTER DATABASE
+postgres=# grant all privileges on database "capsul-flask" to "capsul-flask";
+GRANT
+postgres=# quit
 ```
 
+> NOTE: you can also use docker for this if you wish. See the postgres docker hub page for more details.
+> `docker run --rm -it -e POSTGRES_PASSWORD=dev -p 5432:5432 postgres`
+
 Run the app 
 
 ```sh

setup.cfg

@@ -15,7 +15,7 @@ include_package_data = true
 install_requires =
     Flask
     Flask-Mail
-    psycopg2
+    psycopg
     nanoid
     matplotlib
     stripe