Add a must-gather plugin for basic must-gather parsing and analysis

This is a first pass idea of some skills for analyzing and extracting
basic data (from yamls, no logs yet) from Openshift must-gathers

Author: Prashanth684

.claude-plugin/marketplace.json

@@ -58,6 +58,11 @@
       "name": "yaml",
       "source": "./plugins/yaml",
       "description": "YAML documentation and utilities"
+    },
+    {
+      "name": "must-gather",
+      "source": "./plugins/must-gather",
+      "description": "A plugin to analyze and report on must-gather data"
     }
   ]
 }

plugins/must-gather/.claude-plugin/plugin.json

@@ -0,0 +1,8 @@
+{
+  "name": "must-gather",
+  "description": "A plugin to analyze and report on must-gather data",
+  "version": "0.0.1",
+  "author": {
+    "name": "openshift"
+  }
+}

plugins/must-gather/README.md

@@ -0,0 +1,330 @@
+# Must-Gather Analyzer Plugin
+
+Claude Code plugin for analyzing OpenShift must-gather diagnostic data.
+
+## Overview
+
+This plugin provides tools to analyze must-gather data collected from OpenShift clusters, displaying resource status in familiar `oc`-like format and identifying cluster issues.
+
+## Features
+
+### Skills
+
+- **Must-Gather Analyzer** - Comprehensive analysis of cluster operators, pods, nodes, and network components
+  - Parses YAML resources from must-gather dumps
+  - Displays output similar to `oc get` commands
+  - Identifies and categorizes issues
+  - Provides actionable diagnostics
+
+### Analysis Scripts
+
+All scripts located in `skills/must-gather-analyzer/scripts/`:
+
+#### `analyze_clusterversion.py`
+Analyzes cluster version, update status, and capabilities.
+
+```bash
+./analyze_clusterversion.py <must-gather-path>
+```
+
+Output format matches `oc get clusterversion`:
+```
+NAME       VERSION                                            AVAILABLE   PROGRESSING   SINCE   STATUS
+version    4.20.0-0.okd-scos-2025-08-18-130459                            False         65d
+```
+
+Also provides detailed information:
+- Cluster ID and version hash
+- Current and desired versions
+- Conditions (Available, Progressing, Failing, etc.)
+- Update history
+- Available updates
+- Enabled capabilities
+
+#### `analyze_clusteroperators.py`
+Analyzes cluster operator status and health.
+
+```bash
+./analyze_clusteroperators.py <must-gather-path>
+```
+
+Output format matches `oc get clusteroperators`:
+```
+NAME                                       VERSION   AVAILABLE   PROGRESSING   DEGRADED   SINCE   MESSAGE
+authentication                             4.18.26   True        False         False      149m
+baremetal                                  4.18.26   True        False         False      169m
+```
+
+#### `analyze_pods.py`
+Analyzes pod status across all namespaces.
+
+```bash
+# All pods in all namespaces
+./analyze_pods.py <must-gather-path>
+
+# Specific namespace
+./analyze_pods.py <must-gather-path> --namespace openshift-etcd
+
+# Only problematic pods
+./analyze_pods.py <must-gather-path> --problems-only
+```
+
+Output format matches `oc get pods -A`:
+```
+NAMESPACE                              NAME                                    READY   STATUS             RESTARTS   AGE
+openshift-kube-apiserver               kube-apiserver-master-0                 4/4     Running            0          5d
+openshift-etcd                         etcd-master-1                           1/1     CrashLoopBackOff   15         2h
+```
+
+#### `analyze_nodes.py`
+Analyzes node status and conditions.
+
+```bash
+# All nodes
+./analyze_nodes.py <must-gather-path>
+
+# Only nodes with issues
+./analyze_nodes.py <must-gather-path> --problems-only
+```
+
+Output format matches `oc get nodes`:
+```
+NAME                                       STATUS                     ROLES          AGE     VERSION
+master-0.example.com                       Ready                      master         10d     v1.27.0+1234
+worker-1.example.com                       Ready,MemoryPressure       worker         10d     v1.27.0+1234
+```
+
+#### `analyze_network.py`
+Analyzes network configuration and health.
+
+```bash
+./analyze_network.py <must-gather-path>
+```
+
+Shows:
+- Network type (OVN-Kubernetes, OpenShift SDN)
+- Network operator status
+- OVN pod health
+- PodNetworkConnectivityCheck results
+
+#### `analyze_events.py`
+Analyzes cluster events sorted by last occurrence.
+
+```bash
+# Recent events (last 100)
+./analyze_events.py <must-gather-path>
+
+# Warning events only
+./analyze_events.py <must-gather-path> --type Warning
+
+# Events in specific namespace
+./analyze_events.py <must-gather-path> --namespace openshift-etcd
+
+# Show last 50 events
+./analyze_events.py <must-gather-path> --count 50
+```
+
+Output format:
+```
+NAMESPACE                      LAST SEEN  TYPE       REASON                         OBJECT                                   MESSAGE
+openshift-etcd                 64d        Warning    Unhealthy                      Pod/etcd-guard-ip-10-0-90-209            Readiness probe failed
+openshift-kube-apiserver       64d        Normal     Started                        Pod/kube-apiserver-master-0              Started container
+```
+
+#### `analyze_etcd.py`
+Analyzes etcd cluster health from etcd_info directory.
+
+```bash
+./analyze_etcd.py <must-gather-path>
+```
+
+Shows:
+- Member health status
+- Member list with IDs and URLs
+- Endpoint status (leader, version, DB size)
+- Quorum status and summary
+
+Output includes:
+```
+ETCD CLUSTER SUMMARY
+Total Members: 3
+Healthy Members: 3/3
+  ✅ All members healthy
+  ✅ Quorum achieved (3/2)
+```
+
+#### `analyze_pvs.py`
+Analyzes PersistentVolumes and PersistentVolumeClaims.
+
+```bash
+# All PVs and PVCs
+./analyze_pvs.py <must-gather-path>
+
+# PVCs in specific namespace
+./analyze_pvs.py <must-gather-path> --namespace openshift-monitoring
+```
+
+Output format:
+```
+PERSISTENT VOLUMES
+NAME                                               CAPACITY   ACCESS MODES         RECLAIM    STATUS     CLAIM
+pvc-3d4a0119-b2f2-44fa-9b2f-b11c611c74f2           20Gi       ReadWriteOnce        Delete     Bound      openshift-monitoring/prometheus-data-pro
+
+PERSISTENT VOLUME CLAIMS
+NAMESPACE                      NAME                                STATUS     VOLUME                                         CAPACITY
+openshift-monitoring           prometheus-data-prometheus-0        Bound      pvc-3d4a0119-b2f2-44fa-9b2f-b11c611c74f2       20Gi
+```
+
+### Slash Commands
+
+#### `/analyze-mg [path]`
+Runs comprehensive analysis of must-gather data.
+
+```
+/analyze-mg ./must-gather.local.123456789
+```
+
+Executes all analysis scripts and provides:
+- Executive summary of cluster health
+- Critical issues and warnings
+- Actionable recommendations
+- Suggested logs to review
+
+## Installation
+
+### From Local Repository
+
+If you're working in the must-gather repository:
+
+1. The plugin is already available in `.claude-plugin/`
+2. Claude Code will automatically detect project plugins
+
+### Manual Installation
+
+To use this plugin in other projects:
+
+1. Copy the `.claude-plugin/` directory to your desired location
+2. Add to Claude Code:
+   ```bash
+   /plugin marketplace add /path/to/.claude-plugin
+   /plugin install must-gather-analyzer
+   ```
+
+## Usage Examples
+
+### Analyzing Cluster Version
+
+Ask Claude:
+- "What version is this cluster running?"
+- "Show me the cluster version"
+- "What's the update status?"
+- "What capabilities are enabled?"
+
+### Analyzing Cluster Operators
+
+Ask Claude:
+- "Analyze the cluster operators in this must-gather"
+- "Which operators are degraded?"
+- "Show me operator status"
+
+Claude will automatically use the Must-Gather Analyzer skill and run `analyze_clusteroperators.py`.
+
+### Finding Pod Issues
+
+Ask Claude:
+- "What pods are failing in this must-gather?"
+- "Show me crashlooping pods"
+- "Analyze pods in openshift-etcd namespace"
+
+### Analyzing Events
+
+Ask Claude:
+- "Show me warning events from this must-gather"
+- "What events occurred in openshift-etcd namespace?"
+- "Show me the last 50 events"
+
+### Checking etcd Health
+
+Ask Claude:
+- "Check etcd cluster health"
+- "What's the etcd member status?"
+- "Is etcd quorum healthy?"
+
+### Analyzing Storage
+
+Ask Claude:
+- "Show me PersistentVolumes and PVCs"
+- "What storage resources exist?"
+- "Are there any pending PVCs?"
+
+### Complete Cluster Analysis
+
+```
+/analyze-mg ./must-gather.local.5464029130631179436
+```
+
+This runs all analysis scripts and provides comprehensive diagnostics.
+
+## Requirements
+
+- Python 3.6+
+- PyYAML library (`pip install pyyaml`)
+
+## Must-Gather Directory Structure
+
+Expected directory structure from `oc adm must-gather` output:
+
+```
+must-gather.local.*/
+├── cluster-scoped-resources/
+│   ├── config.openshift.io/
+│   │   └── clusteroperators/
+│   └── core/
+│       └── nodes/
+├── namespaces/
+│   └── <namespace>/
+│       └── core/
+│           └── pods/
+└── network_logs/
+```
+
+## Development
+
+### Adding New Analysis Scripts
+
+1. Create script in `skills/must-gather-analyzer/scripts/`
+2. Follow the output format pattern (matching `oc get` commands)
+3. Update `SKILL.md` with usage instructions
+4. Add to `/analyze-mg` command workflow
+
+### Output Format Guidelines
+
+All scripts should:
+- Use tabular output matching `oc` command format
+- Handle missing resources gracefully
+- Print "No resources found." when appropriate
+- Support common flags like `--namespace`, `--problems-only`
+
+## Troubleshooting
+
+### "No resources found"
+- Verify must-gather path is correct
+- Check that must-gather completed successfully
+- Ensure directory structure matches expected format
+
+### Scripts not executing
+- Verify scripts are executable: `chmod +x scripts/*.py`
+- Check Python 3 is available
+- Install dependencies: `pip install pyyaml`
+
+## Contributing
+
+When adding new analysis capabilities:
+1. Follow existing script patterns
+2. Match `oc` command output format
+3. Include error handling for missing data
+4. Update this README with new features
+
+## License
+
+This plugin is part of the openshift/must-gather repository.