reduce number of containers and add python reference

main.go

@@ -10,8 +10,8 @@ import (
 var mongoBasePath = "/opt/my-mongo"
 var replicasetName = "techtransthai-db"
 var networkName = "mongonet"
-var numberOfContainers int = 5
+var numberOfContainers int = 2
-var maxMemAllocPercent int = 95
+var maxMemAllocPercent int = 80
 var mongoInitdbRootUsername = "sasha"
 var mongoInitdbRootPassword = "12345"
 var verbosePtr = flag.Bool("v", false, "boolean")

python-reference.py

@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+
+import os
+import subprocess
+import time
+    
+#-----------------
+# Settings
+
+MONGO_BASE_PATH = '/opt/my-mongo'
+REPLICASET_NAME = 'techtransthai-db'
+NETWORK_NAME = 'mongonet'
+NUMBER_OF_CONTAINERS = '5'
+MAX_MEM_ALLOC_PERCENT = '95'
+MONGO_INITDB_ROOT_USERNAME = 'sasha'
+MONGO_INITDB_ROOT_PASSWORD = '12345'
+#-----------------
+
+if os.getuid() != 0:
+    print("You must be root to run this script")
+    exit()
+
+if int(NUMBER_OF_CONTAINERS) < 1 and int(NUMBER_OF_CONTAINERS) > 7:
+    print("Number of containers must be between 1 and 7")
+    exit()
+
+if int(MAX_MEM_ALLOC_PERCENT) < 50 and int(NMAX_MEM_ALLOC_PERCENT) > 100:
+    print("Memory allocation must be between 50% and 100%")
+    exit()
+
+print(f"\n\033[1;32mInstalling Python dependencies and OpenSSL from Ubuntu repo\033[0m\n")
+
+subprocess.run("apt install -y python3-pymongo python3-psutil openssl", shell=True, check=True)
+
+print(f"\n\033[1;32mGenerating keys\033[0m\n")
+
+keyfile_location = MONGO_BASE_PATH + "/mongodb-keyfile"
+subprocess.run("openssl rand -base64 741 > " + keyfile_location, shell=True, check=True)
+subprocess.run("chmod 600 " + keyfile_location, shell=True, check=True)
+subprocess.run("chown 999 " + keyfile_location, shell=True, check=True)
+
+print(f"\n\033[1;32mInstalling Docker CE from official repo\033[0m\n")
+
+docker_install="""
+apt update
+install -m 0755 -d /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
+chmod a+r /etc/apt/keyrings/docker.asc
+
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
+  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
+  tee /etc/apt/sources.list.d/docker.list > /dev/null
+apt update 
+
+apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+"""
+
+subprocess.run(docker_install, shell=True, check=True)
+
+print(f"\n\033[1;32mCreating Docker network {NETWORK_NAME} for MongoDB Cluster\033[0m\n")
+
+network_command = "docker network create " + NETWORK_NAME
+
+subprocess.run(network_command, shell=True, check=True)
+
+print(f"\n\033[1;32mPulling MongoDB Image\033[0m\n")
+
+subprocess.run("docker pull mongo", shell=True, check=True)
+
+import psutil
+
+mem_per_container = f'{(psutil.virtual_memory().total/1073741824)*(int(MAX_MEM_ALLOC_PERCENT)/(int(NUMBER_OF_CONTAINERS)*100)):.2f}'
+
+for container_number in range(int(NUMBER_OF_CONTAINERS)):
+  print(f"\n\033[1;32mStarting MongoDB Container #{container_number} with {mem_per_container} GB of memory\033[0m\n")
+  docker_cmd = f"docker run -d -p 3000{container_number}:27017 --name mongo{container_number} --net {NETWORK_NAME} -e MONGO_INITDB_ROOT_USERNAME={MONGO_INITDB_ROOT_USERNAME} -e MONGO_INITDB_ROOT_PASSWORD={MONGO_INITDB_ROOT_PASSWORD} -v {MONGO_BASE_PATH}/mongo{container_number}:/data/db -v {MONGO_BASE_PATH}:/opt/keyfile  --restart unless-stopped mongo mongod --replSet {REPLICASET_NAME} --wiredTigerCacheSizeGB {mem_per_container} --keyFile /opt/keyfile/mongodb-keyfile"
+
+  subprocess.run(docker_cmd, shell=True, check=True)
+
+print(f"\n\033[1;32mWaiting for all containers to start\033[0m\n")
+
+time.sleep(10)
+#----------------------------------------------------------------------------------
+
+print(f"\n\033[1;32mInitializing replica set {REPLICASET_NAME} of {NUMBER_OF_CONTAINERS} containers\033[0m\n")
+
+from pymongo import MongoClient
+from pymongo.errors import PyMongoError
+
+# Connect to the MongoDB instances
+
+client = MongoClient('mongodb://sasha:12345@localhost:30000')
+
+# Initialize a replica set
+try:
+    # Build the replica set configuration
+    config = {
+    "_id": REPLICASET_NAME,
+    # "keyFile": "/opt/keyfile/mongodb-keyfile",
+    "members": []
+    }
+
+    for i in range(int(NUMBER_OF_CONTAINERS)):
+        member = {
+            "_id": i,
+            "host": "mongo"+str(i)
+        }
+        config["members"].append(member)
+
+    # Initialize the replica set
+    client.admin.command('replSetInitiate', config)
+    print("Replica set "+ REPLICASET_NAME + " initialized successfully.")
+
+except PyMongoError as e:
+    print("Error initializing replica set:", e)