Cheeky script to pull IP's out from the cluster w/ ports

Good poc of how to get game server
connection info that we will provide to a bot/user

infra/vultr-kubernetes/dev/.gitignore

@@ -0,0 +1,4 @@
+# created by virtualenv automatically
+bin/
+lib/
+

infra/vultr-kubernetes/dev/find-server.py

@@ -0,0 +1,38 @@
+from argparse import ArgumentParser
+from argparse import Namespace
+from kubernetes import client, config
+import re
+
+def get_args() -> Namespace:
+    parser = ArgumentParser(
+        prog="Cluster Search Thing",
+        description="General utility for finding resources for game server bot"
+    )
+    games = {"reflex", "minecraft", "nginx"}
+    parser.add_argument('-g', '--game', required=True, choices=games)
+    return parser.parse_args()
+
+def k8s_api(config_path: str) -> client.api.core_v1_api.CoreV1Api:
+    config.load_kube_config("../config.yaml")
+    print("Getting pod name of our game requested")
+    return client.CoreV1Api()
+
+if __name__ == '__main__':
+    args = get_args()
+
+    # Setting up k8s stuff
+    api = k8s_api('../config.yaml')
+    print(type(api))
+    pods = api.list_pod_for_all_namespaces(label_selector=f'app={args.game}')
+
+    # Now we collect specific data about the game server we requested
+    port = pods.items[0].spec.containers[0].ports[0].container_port
+
+    # Collecting the IPV4 of the node that contains the pod(container)
+    # we actually care about. Since these pods only have 1 container
+    node_name = pods.items[0].spec.node_name
+    node_ips  = list(filter(lambda a: a.type == 'ExternalIP', api.list_node().items[0].status.addresses))
+    ipv4 = list(filter(lambda item: not re.match('[\d\.]{3}\d', item.address), node_ips))[0].address
+    ipv6 = list(filter(lambda item: re.match('[\d\.]{3}\d', item.address), node_ips))[0].address
+    
+    print(f'{args.game} --> {ipv4}:{port} ~~> {ipv6}:{port}')

infra/vultr-kubernetes/dev/pyvenv.cfg

@@ -0,0 +1,8 @@
+home = /usr
+implementation = CPython
+version_info = 3.10.12.final.0
+virtualenv = 20.13.0+ds
+include-system-site-packages = false
+base-prefix = /usr
+base-exec-prefix = /usr
+base-executable = /usr/bin/python3

infra/vultr-kubernetes/dev/requirements.txt

@@ -0,0 +1,18 @@
+cachetools==5.5.0
+certifi==2024.8.30
+charset-normalizer==3.4.0
+durationpy==0.9
+google-auth==2.36.0
+idna==3.10
+kubernetes==31.0.0
+oauthlib==3.2.2
+pyasn1==0.6.1
+pyasn1_modules==0.4.1
+python-dateutil==2.9.0.post0
+PyYAML==6.0.2
+requests==2.32.3
+requests-oauthlib==2.0.0
+rsa==4.9
+six==1.17.0
+urllib3==2.2.3
+websocket-client==1.8.0

infra/vultr-kubernetes/firewall.tf

@@ -7,3 +7,13 @@ resource vultr_firewall_rule web_inbound {
   subnet_size = 0
   port = each.value
 }
+
+resource vultr_firewall_rule game-server-inbound {
+  for_each = var.game_servers.configs
+  firewall_group_id = vultr_kubernetes.athens.firewall_group_id
+  protocol = "tcp"
+  ip_type = "v4"
+  subnet = "0.0.0.0"
+  subnet_size = 0
+  port = each.value.port
+}

infra/vultr-kubernetes/game-server.tf

@@ -0,0 +1,52 @@
+resource kubernetes_namespace game-servers {
+    metadata {
+        name = var.game_servers.namespace
+    }
+}
+
+resource kubernetes_pod game {
+    for_each = var.game_servers.configs
+
+    metadata {
+        name = each.key
+        namespace = var.game_servers.namespace
+        labels = {
+            app = each.key
+        }
+    }
+    spec {
+        container {
+            image = each.value.image
+            name  = coalesce(each.value.name, each.key)
+            resources {
+                limits = {
+                    cpu    = each.value.cpu
+                    memory = each.value.mem
+                }
+            }
+            port {
+                container_port = each.value.port
+                protocol       = coalesce(each.value.proto, "TCP")
+            }
+        }
+    }
+}
+
+resource kubernetes_service game {
+    for_each = var.game_servers.configs
+    metadata {
+        name = each.key
+        namespace = var.game_servers.namespace
+    }
+    spec {
+        selector = {
+            app = each.key
+        }
+        port {
+            target_port = each.value.port
+            port        = each.value.port
+            node_port   = each.value.port
+        }
+        type = "NodePort"
+    }
+}

infra/vultr-kubernetes/test-nginx.tf

@@ -0,0 +1,64 @@
+# Here we create a super simple pod that we can reach via IP
+# Using nginx as the service to expose
+
+locals {
+    sanity = {
+        namespace = "sanity"
+        service   = "web-health"
+        port      = 30808
+    }
+}
+
+resource kubernetes_namespace sanity {
+    metadata {
+        name = local.sanity.namespace
+    }
+}
+
+resource kubernetes_pod nginx {
+    metadata {
+        name = local.sanity.service
+        labels = {
+            app = local.sanity.service
+        }
+    }
+    spec {
+        container {
+            image = "nginx:latest"
+            name  = "nginx"
+            resources {
+                limits = {
+                    cpu    = "200m"
+                    memory = "64Mi"
+                }
+            }
+            liveness_probe {
+                http_get {
+                    path = "/"
+                    port = 80
+                }
+
+                initial_delay_seconds = 30
+                period_seconds = 30
+            }
+        }
+    }
+}
+
+resource kubernetes_service nginx {
+    metadata {
+        name = local.sanity.service
+    }
+    spec {
+        selector = {
+            app = local.sanity.service
+        }
+        port {
+            port        = 8080
+            target_port = 80
+            node_port   = local.sanity.port
+        }
+        type      = "NodePort"
+    }
+}
+

infra/vultr-kubernetes/variables.tf

@@ -34,6 +34,18 @@ variable cluster {
   })
 }
 
-variable lab_domain {
-  type = string
+variable game_servers {
+  type = object({
+    namespace = string
+    configs = map(object({
+        name  = optional(string)
+        image = string
+        cpu   = string
+        mem   = string
+        port  = number
+        proto = optional(string)
+      })
+    )
+  })
 }
+

infra/vultr-kubernetes/variables.tfvars

@@ -1,4 +1,3 @@
-
 cluster = {
   region = "lax"
   label   = "athens-cluster"
@@ -11,4 +10,14 @@ cluster = {
   }
 }
 
-lab_domain = "temprah-lab.xyz"
+game_servers = {
+  namespace = "games"
+  configs = {
+    nginx = {
+      image = "nginx:latest"
+      cpu   = "200m"
+      mem   = "64Mi"
+      port  = 30808
+    }
+  }
+}