+

.idea/Ubuntu.iml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/Ubuntu.iml" filepath="$PROJECT_DIR$/.idea/Ubuntu.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

.idea/workspace.xml

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AutoImportSettings">
+    <option name="autoReloadType" value="SELECTIVE" />
+  </component>
+  <component name="ChangeListManager">
+    <list default="true" id="e1fbeaad-6efe-4e4e-9cc3-db157d3cbbd0" name="Changes" comment="" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
+  <component name="ProjectColorInfo">{
+  &quot;associatedIndex&quot;: 2
+}</component>
+  <component name="ProjectId" id="2t3w0yc2N4mk67dYNBrpPZpSXiI" />
+  <component name="ProjectViewState">
+    <option name="hideEmptyMiddlePackages" value="true" />
+    <option name="showLibraryContents" value="true" />
+  </component>
+  <component name="PropertiesComponent"><![CDATA[{
+  "keyToString": {
+    "RunOnceActivity.ShowReadmeOnStart": "true",
+    "RunOnceActivity.git.unshallow": "true",
+    "git-widget-placeholder": "master",
+    "ignore.virus.scanning.warn.message": "true",
+    "kotlin-language-version-configured": "true",
+    "last_opened_file_path": "O:/MyDocuments/projects/Workspace_JavaWin/org.ccalm.jwt",
+    "node.js.detected.package.eslint": "true",
+    "node.js.detected.package.tslint": "true",
+    "node.js.selected.package.eslint": "(autodetect)",
+    "node.js.selected.package.tslint": "(autodetect)",
+    "nodejs_package_manager_path": "npm",
+    "vue.rearranger.settings.migration": "true"
+  }
+}]]></component>
+  <component name="SharedIndexes">
+    <attachedChunks>
+      <set>
+        <option value="bundled-jdk-9823dce3aa75-fdfe4dae3a2d-intellij.indexing.shared.core-IU-243.21565.193" />
+        <option value="bundled-js-predefined-d6986cc7102b-e768b9ed790e-JavaScript-IU-243.21565.193" />
+      </set>
+    </attachedChunks>
+  </component>
+  <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="e1fbeaad-6efe-4e4e-9cc3-db157d3cbbd0" name="Changes" comment="" />
+      <created>1739593846366</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1739593846366</updated>
+      <workItem from="1739593847495" duration="18000" />
+      <workItem from="1739594598328" duration="1702000" />
+      <workItem from="1739615418937" duration="12348000" />
+      <workItem from="1739638286710" duration="2801000" />
+      <workItem from="1739696550212" duration="15168000" />
+      <workItem from="1739987384678" duration="5000" />
+      <workItem from="1739987550416" duration="37000" />
+    </task>
+    <servers />
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="3" />
+  </component>
+</project>

HAProxy_install.md

@@ -101,7 +101,10 @@ stats auth igor:i123456
   sudo journalctl -u haproxy --no-pager | tail -n 50
 ````
 Перезагружаем:
-sudo systemctl restart haproxy
+```sh
+  sudo systemctl restart haproxy
+````
+
 И теперь должно открываться но адресу: http://data.ccalm.org:8989/
 Обязательно проверить как установился SSL чекером: https://www.leaderssl.ru/tools/ssl_checker
 

PostgreSQL_Exporter.md

@@ -0,0 +1,135 @@
+Устанавливаю согласно инструкции из:
+
+https://github.com/prometheus-community/postgres_exporter
+
+Подключаюсь к нужной машине
+```sh
+ssh igor@ccalm.org -p 2200
+```
+
+## 1. Установка Docker и Docker Compose
+Если Docker не установлен, установим его:
+```sh
+    sudo apt update && sudo apt upgrade -y &&
+    sudo apt install -y docker.io docker-compose &&
+    sudo systemctl enable --now docker
+```
+
+## 2. Установка postgres-exporter в докере из заранее подготовленного образа
+
+```sh
+sudo mkdir -p /opt/postgres-exporter &&
+sudo chown $USER:$USER /opt/postgres-exporter &&
+cd /opt/postgres-exporter
+```
+
+Создаю файл с настройками
+```sh
+cd /opt/postgres-exporter/ &&
+cat > docker-compose.yml <<EOF
+services:
+  postgres-exporter:
+    image: quay.io/prometheuscommunity/postgres-exporter
+    container_name: postgres-exporter
+    restart: unless-stopped
+    network_mode: "host"
+    environment:
+      DATA_SOURCE_URI: "postgresql://postgres:309A86FF65A78FB428F4E38DFE35F730@localhost:5432/postgres?sslmode=disable"
+    volumes:
+      - ./postgres_exporter.yml:/etc/postgres_exporter.yml
+    command:
+      - "--config.file=/etc/postgres_exporter.yml"
+
+EOF
+```
+
+Создаём файл с настройками
+```sh
+cd /opt/postgres-exporter/ &&
+cat > postgres_exporter.yml <<EOF
+collectors:
+  - database
+  - index
+  - query
+  - table
+EOF
+```
+Запускаю:
+```sh
+  cd /opt/postgres-exporter &&
+  sudo docker-compose up -d
+```
+
+Проверяю запущен ли докер
+```sh
+  sudo docker ps
+```
+
+Testing with:
+```sh
+curl "http://127.0.0.1:9187/metrics"
+```
+
+Посмотреть журнал за сегодня:
+```sh
+journalctl --since today
+```
+
+Настраиваем простую авторизацию при помощи HAProxy для скачивания при помощи удаленного сервера
+
+```sh
+sudo mcedit /etc/haproxy/haproxy.cfg
+```
+Настраиваем:
+```text
+    acl v_metrics_nd path_beg /metrics_nd
+    acl v_basic_auth http_auth(prometheus_list)
+    http-request auth realm Metrics_org_ccalm_nd if v_metrics_nd !v_basic_auth
+    use_backend b_metrics_nd if v_metrics_nd v_basic_auth
+
+backend b_metrics_nd
+    mode http
+    option http-keep-alive
+    http-request replace-path .* /metrics
+    server web1 127.0.0.1:9100 check
+```
+
+Проверяем
+```sh
+  haproxy -f /etc/haproxy/haproxy.cfg -c
+````
+Перезагружаем:
+```sh
+  sudo systemctl restart haproxy
+````
+
+
+
+Подключаюсь к машине где Prometeus:
+
+```sh
+ssh igor@192.168.200.84 -p 22
+```
+
+Перезагружаем prometheus чтобы он начал собирать метрики
+```sh
+	sudo systemctl restart prometheus
+```
+
+
+
+
+Теперь можно настраивать графану, вот готовыдашбоард
+Открыть Grafana
+Перейти в Dashboards → Import
+Вставить ID: 9628
+Выбрать источник данных Prometheus (с PostgreSQL Exporter)
+Нажать Import
+
+
+Теперь можно настраивать графану, вот готовыдашбоард
+Открыть Grafana
+Перейти в Dashboards → Import
+Вставить ID: 12273
+Выбрать источник данных Prometheus (с PostgreSQL Exporter)
+Нажать Import

PostgreSQL_replication.md

@@ -0,0 +1,12 @@
+
+Создано на основе https://www.cherryservers.com/blog/how-to-set-up-postgresql-database-replication
+
+Подключаюсь к нужной машине
+```sh
+ssh igor@192.168.200.84 -p 22
+```
+
+
+
+
+

rabbitmq_replication_setup_instructions.md

@@ -0,0 +1,341 @@
+Here’s a step-by-step guide to setting up a **RabbitMQ cluster with replication** correctly:
+
+---
+
+## **Step 1: Prepare the Servers**
+
+Ensure you have at least **three** nodes (recommended for HA) with:
+
+- Ubuntu 22.04 (or a supported OS)
+- Sufficient CPU/RAM based on workload
+- Open necessary firewall ports (**5672, 15672, 25672**)
+
+Set hostnames for clarity:
+
+```bash
+sudo hostnamectl set-hostname rabbitmq-node1  # Change for each node
+```
+
+---
+
+## **Step 2: Install Erlang and RabbitMQ**
+
+Run the following on **all nodes**:
+
+### **1. Add the RabbitMQ Repository**
+
+```bash
+sudo apt update
+sudo apt install -y curl gnupg
+curl -fsSL https://packagecloud.io/rabbitmq/rabbitmq-server/gpgkey | sudo tee /usr/share/keyrings/rabbitmq-key.asc
+echo "deb [signed-by=/usr/share/keyrings/rabbitmq-key.asc] https://packagecloud.io/rabbitmq/rabbitmq-server/ubuntu/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/rabbitmq.list
+```
+
+### **2. Install Erlang and RabbitMQ**
+
+```bash
+sudo apt update
+sudo apt install -y rabbitmq-server
+```
+
+### **3. Enable RabbitMQ**
+
+```bash
+sudo systemctl enable --now rabbitmq-server
+```
+
+---
+
+## **Step 3: Configure Clustering**
+
+### **1. Stop RabbitMQ on All Nodes**
+
+```bash
+sudo systemctl stop rabbitmq-server
+```
+
+### **2. Configure Cookie for Clustering**
+
+Run on **all nodes** (same cookie ensures clustering works):
+
+```bash
+echo "MY_CLUSTER_COOKIE" | sudo tee /var/lib/rabbitmq/.erlang.cookie
+sudo chmod 600 /var/lib/rabbitmq/.erlang.cookie
+```
+
+Replace `"MY_CLUSTER_COOKIE"` with a strong, identical value on all nodes.
+
+---
+
+## **Step 4: Join Nodes to the Cluster**
+
+Perform this on **nodes 2 and 3**, joining them to **node1**:
+
+```bash
+sudo rabbitmqctl stop_app
+sudo rabbitmqctl join_cluster rabbit@rabbitmq-node1
+sudo rabbitmqctl start_app
+```
+
+Check cluster status:
+
+```bash
+sudo rabbitmqctl cluster_status
+```
+
+---
+
+## **Step 5: Enable High Availability (HA) Mirroring**
+
+To replicate all queues, run on **any one node**:
+
+```bash
+rabbitmqctl set_policy ha-all "^.*" '{"ha-mode":"all","ha-sync-mode":"automatic"}'
+```
+
+This ensures all queues are **replicated across all nodes**.
+
+---
+
+## **Step 6: Enable Management UI**
+
+Run on **each node** to enable the web interface:
+
+```bash
+sudo rabbitmq-plugins enable rabbitmq_management
+```
+
+Access at:  
+**http://[NODE_IP]:15672**  
+(Default login: `guest/guest`, change this for security.)
+
+---
+
+## **Step 7: Test the Cluster**
+
+Run on **each node**:
+
+```bash
+rabbitmqctl list_queues
+```
+
+Queues should be visible and synchronized.
+
+---
+
+## **Step 8: Enable Auto-Recovery** (Optional)
+
+Edit `/etc/rabbitmq/rabbitmq.conf` on **each node** and add:
+
+```ini
+cluster_formation.peer_discovery_backend = classic_config
+cluster_formation.classic_config.nodes.1 = rabbit@rabbitmq-node1
+cluster_formation.classic_config.nodes.2 = rabbit@rabbitmq-node2
+cluster_formation.classic_config.nodes.3 = rabbit@rabbitmq-node3
+```
+
+Then restart RabbitMQ:
+
+```bash
+sudo systemctl restart rabbitmq-server
+```
+
+---
+
+## **Step 9: Secure the Cluster** (Recommended)
+
+### **1. Create an Admin User**
+
+```bash
+rabbitmqctl add_user admin StrongPassword123!
+rabbitmqctl set_user_tags admin administrator
+rabbitmqctl set_permissions -p / admin ".*" ".*" ".*"
+```
+
+Then **disable the guest account**:
+
+```bash
+rabbitmqctl delete_user guest
+```
+
+### **2. Enable TLS (Optional)**
+
+For security, configure TLS in `/etc/rabbitmq/rabbitmq.conf`. Refer to RabbitMQ’s [TLS guide](https://www.rabbitmq.com/ssl.html).
+
+---
+
+## **Step 10: Setup Monitoring (Optional)**
+
+Install **Prometheus & Grafana** or use **RabbitMQ Prometheus plugin**:
+
+```bash
+sudo rabbitmq-plugins enable rabbitmq_prometheus
+```
+
+---
+
+Now your RabbitMQ cluster is fully set up with **replication and high availability**! 🚀
+
+---
+
+<br>
+<br>
+<br>
+<br>
+
+# Instructions to fix **unexpected** configuration errors
+
+If you can't find the RabbitMQ config file under `/etc/rabbitmq`, it may not exist by default. You need to **create it manually**. Here's how:
+
+## **1️⃣ Create the Configuration File**
+
+RabbitMQ uses either a **`.conf` file** (modern format) or a **`.config` file** (legacy format). The recommended format is `.conf`.
+
+Create the file if it doesn't exist:
+
+```bash
+sudo nano /etc/rabbitmq/rabbitmq.conf
+```
+
+Then add the following cluster configuration:
+
+```
+cluster_formation.peer_discovery_backend = classic_config
+cluster_formation.classic_config.nodes.1 = rabbit@rabbitmq-main
+cluster_formation.classic_config.nodes.2 = rabbit@rabbitmq-replica
+```
+
+Save and exit (`CTRL+X`, then `Y`, then `Enter`).
+
+---
+
+## **2️⃣ Set Correct Permissions**
+
+Ensure the RabbitMQ user can read it:
+
+```bash
+sudo chown rabbitmq:rabbitmq /etc/rabbitmq/rabbitmq.conf
+sudo chmod 644 /etc/rabbitmq/rabbitmq.conf
+```
+
+---
+
+## **3️⃣ Restart RabbitMQ**
+
+After modifying the configuration, restart the RabbitMQ service:
+
+```bash
+sudo systemctl restart rabbitmq-server
+```
+
+Check the status:
+
+```bash
+sudo systemctl status rabbitmq-server
+```
+
+---
+
+## **4️⃣ Verify the Cluster Configuration**
+
+After restarting, verify that clustering is working:
+
+```bash
+rabbitmqctl cluster_status
+```
+
+If the nodes are listed correctly, your setup is working.
+
+---
+
+## **5️⃣ If Using the Legacy `.config` Format**
+
+Some older installations use an **Erlang-based configuration file** (`rabbitmq.config`). If you prefer that, create:
+
+```bash
+sudo nano /etc/rabbitmq/rabbitmq.config
+```
+
+Add this:
+
+```erlang
+[
+ {rabbit, [
+   {cluster_formation, [
+     {peer_discovery_backend, classic_config},
+     {classic_config, [
+       {nodes, ['rabbit@rabbitmq-main', 'rabbit@rabbitmq-replica']}
+     ]}
+   ]}
+ ]}
+].
+```
+
+Then restart RabbitMQ:
+
+```bash
+sudo systemctl restart rabbitmq-server
+```
+
+---
+
+### **🔍 Troubleshooting**
+
+❌ **RabbitMQ doesn't restart?**  
+Check logs for errors:
+
+```bash
+sudo journalctl -u rabbitmq-server --no-pager | tail -50
+```
+
+❌ **Cluster not forming?**  
+Try forcing a node to join manually:
+
+```bash
+rabbitmqctl stop_app
+rabbitmqctl join_cluster rabbit@rabbitmq-main
+rabbitmqctl start_app
+```
+
+---
+
+<br>
+<br>
+<br>
+<br>
+
+# Instructions to fix **unexpected** management UI authentication errors
+
+stackoverflow answer [link](https://stackoverflow.com/a/40845332/27251837)
+
+## Answer
+
+### ❌ **Cannot login with guest/guest credentials**
+
+I had the same Problem..
+
+I installed RabbitMQ and Enabled Web Interface also but still couldn't sign in with any user i newly created, this is because you need to be administrator to access this.
+
+Do not create any config file and mess with it..
+
+This is what i did then,
+
+1. Add a new/fresh user, say user test and password test:
+
+```bash
+rabbitmqctl add_user test test
+```
+
+2. Give administrative access to the new user:
+
+```bash
+rabbitmqctl set_user_tags test administrator
+```
+
+3. Set permission to newly created user:
+
+```bash
+rabbitmqctl set_permissions -p / test ".*" ".*" ".*"
+```
+
+That's it, enjoy :)