# Achieving 100% ‘Ready-to-Code’ Availability with Hexnode Self-Healing For a global enterprise, developer downtime caused by broken local environments (e.g., Docker crashes, corrupted system paths) is a critical cost driver. This framework operationalizes autonomous endpoint self-remediation by leveraging Hexnode UEM’s **Custom Scripting engine**. By chaining **Dynamic Groups** (The Detector) with **Genie-authored Scripts** (The Enforcer), the system creates a continuous “Self-Healing” loop that ensures developer tools remain in a “Ready-to-Code” state on macOS and Linux without manual IT intervention. The Hexnode Self-Healing Architecture ------------------------------------- Hexnode’s self-healing operates as a closed-loop system where the device’s own state triggers the necessary repair through the portal. - **The Detector (Dynamic Groups)**: The **Hexnode UEM Agent** (HLA/HMA) monitors device attributes and compliance status. When a device deviates from the “Ready-to-Code” state, it is automatically moved into a pre-configured [Dynamic Group](https://www.hexnode.com/mobile-device-management/help/dynamic-device-groups/). - **The Enforcer**: A remediation configuration (policy-based on macOS, action/automation-based on Linux) containing the repair payload is associated with the Dynamic Group. When a device enters the group, the remediation mechanism becomes active based on its configured trigger. - **The Remediation ([Hexnode Genie](https://www.hexnode.com/mobile-device-management/help/create-scripts-with-ai-powered-terminal-script-generator-hexnode-genie/))**: Uses AI-generated scripts to perform localized repairs (e.g., restarting Docker, fixing $PATH) that are delivered through [Scripts policy](https://www.hexnode.com/mobile-device-management/help/automate-the-execution-of-custom-scripts-on-mac/) (macOS) or [Execute Custom Script action](https://www.hexnode.com/mobile-device-management/help/how-to-create-and-execute-custom-scripts-on-linux/)(Linux). The “Working State” Health Checks --------------------------------- The Self-Healing Loop proactively identifies and corrects failures across three primary categories: ### 1. Container Runtime Health (Docker/Podman) - **Trigger**: The Docker daemon is not responding to a docker info query, or the local socket is inaccessible. - **Hexnode Logic**: A scheduled **Custom Script** identifies if the failure is due to a hung process, exhausted disk space, or configuration drift in /etc/docker/daemon.json. ### 2. Environment & Toolchain Integrity - **Trigger**: Mandatory binaries (e.g., git, python3, kubectl) are missing from the shell path or have been superseded by incompatible versions. - **Hexnode Logic**: The **Hexnode Agent** executes a diagnostic script to inspect .bashrc or .zshrc integrity and verify that corporate-mandated symlinks are intact. ### 3. IDE & Plugin Stability - **Trigger**: High crash frequency of VS Code or IntelliJ IDEA, or the absence of mandatory security plugins (e.g., **Snyk** or **SonarLint**). - **Hexnode Logic**: Scripts identify corrupted plugin caches. **Required Apps** ([macOS](https://www.hexnode.com/mobile-device-management/help/how-to-enforce-app-installation-on-mac-devices-using-hexnode-uem/)/[Linux](https://www.hexnode.com/mobile-device-management/help/manage-application-installation-on-linux-from-hexnode-uem/)) are used to force-install or repair missing extensions silently. Execution Logic: The 4-Phase Response ------------------------------------- ### Phase 1: Deep Diagnostic (SENSE) The **Hexnode Agent (HLA/HMA)** identifies that a core service is down through a “Detector” script. - **Hexnode Workflow**: A scheduled **Custom Script** runs locally. It doesn’t just check if a process is running; it queries the service (e.g., docker info). - **Signaling**: If the service fails, the script output can be used to update a **[Custom Attribute](https://www.hexnode.com/mobile-device-management/help/add-custom-attributes/)** or triggers a **Non-Compliant** status. This automatically sucks the device into a **Dynamic Group** (the “Trap”). ### Phase 2: Dependency Verification (THINK) Before the repair is enforced, the orchestrator (via the logic in the remediation script) checks for blockers to avoid “fixing” a device that has a physical limitation. - **Disk Check**: The script checks if the failure is a byproduct of **Critical Disk Space**. If so, it triggers a docker system prune instead of a service restart. - **Network Check**: Hexnode verifies if the device is “Offline” or “Roaming” (via **Network Usage** reports) to prevent failed registry syncs during repair. ### Phase 3: Targeted Remediation (ACT) Hexnode dispatches a context-aware **Hexnode Genie AI Bash Script** for near-instant execution. - **Service Reset**: The script restarts the daemon (e.g., systemctl restart docker) with inherited environment variables. - **Link Restoration**: The script re-applies corporate standard $PATH variables and symlinks to the user’s .zshrc or .bashrc. - **Enforcement**: This is handled via **Script Policy** (macOS) and **Execute Custom Script** action (Linux) associated with the Dynamic Group. ### Phase 4: Productivity Handshake (VERIFY) The Hexnode Agent performs a final verification check to ensure the “Ready-to-Code” state is restored. - **Compliance Update**: Once the script confirms the service is active, the device’s status is updated. It leaves the Dynamic Group, which removes the remediation policy. - **User Notification**: A message is sent via **Broadcast Message action**: “*IT noticed your Docker service was unresponsive and has performed an automated restart. You are ready to go.*” Scale Impact & ROI (500k Fleet) ----------------------------------- Metric Manual Engineering SupportHexnode Self-HealingAverage TTR45 – 90 Minutes< 3 MinutesHelpdesk LoadHigh (Repetitive tasks)Zero (Autonomous)Developer FrustrationHigh (Blocker)Low (Silent/Fast Fix)Fleet UniformityVariableHigh (Deterministic Stack)Power-User Governance & Safety Rails ---------------------------------------- - **“Experimental” Opt-out**: Developers can apply a [HEXNODE_IGNORE_SHELL] tag. The repair script is coded to exit if this tag is found. - **Interactive Mode**: Configure the script to “Ask Before Fixing” via an interactive prompt. - **Audit Trail**: Every autonomous action is logged in [Hexnode Audit History](https://www.hexnode.com/mobile-device-management/help/managing-audit-reports-in-hexnode-uem/) (portal events) and [Hexnode Action History](https://www.hexnode.com/mobile-device-management/help/manage-action-reports-in-hexnode-uem/) (command statuses). Implementation Checklist ------------------------ 1. Configure **Diagnostic Scripts** to detect Docker failures, broken $PATH, missing binaries, and IDE/plugin issues. 2. Create **Dynamic Groups** for “Ready-to-Code Drift” using Compliance Status or Custom Attributes (e.g., Docker_Status = Down). 3. Use **Hexnode Genie** to generate macOS/Linux self-healing scripts for Docker, shell paths, and toolchain repair. 4. Upload and validate all Genie scripts in the **Content Repository**. 5. Create a **Remediation assignments**: - **macOS: Script Policy** attached to the Dynamic Group - **Linux: Execute Custom Script action** triggered via automation or scheduling for the Dynamic Group. 6. Use **Required Apps** to silently re-install mandatory IDE plugins and developer tools when missing. 7. Track success and failures using **Action History** and **Audit History**.