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feat: add infrastructure automation scripts and master improvement plan

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Snarf
2026-11-02 03:07:29 -05:00
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docs/infrastructure_improvement_plan.md
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@@ -8,9 +8,9 @@ This master architectural plan defines the prioritized roadmap, implementation b
Following Site Reliability Engineering (SRE) best practices, the nine infrastructure initiatives and the power resilience architecture are ordered into a **7-Phase Dependency Graph**:
1. **Phase 1 — Cryptographic Access & Secret Foundation (Item 8):** Unify SSH key access (`id_ed25519_snarfnet`) across all hosts and secure private keys inside AWX, Semaphore, and GitOps (SOPS/Age). *Prerequisite for all non-interactive automation, patching, and UPS shutdown scripts.*
2. **Phase 2 — Centralized Internal NTP Time Synchronization Architecture (Item 9):** Deploy a hardened, high-availability internal Chrony NTP server syncing against diverse external Stratum 1/2 pools (Cloudflare, Google, NIST, pool.ntp.org) with local stratum fallback. Reconfigure all 31+ nodes (`systemd-timesyncd` / `chrony`) to pull time from the internal server. *Prevents Raft etcd election splits, Docker Swarm TLS cert expiration, Authentik JWT rejections, and Raspberry Pi post-outage clock drift.*
3. **Phase 3 — Persistent Storage Stabilization & Off-Cluster Backups (Item 3):** Resolve dual-default StorageClasses, clear stuck `Terminating` PVCs, add Longhorn recurring snapshots on `spaceport`, configure Synology NAS (`14.10.10.71`) as the NFSv4 BackupTarget for all Longhorn clusters, and migrate Docker Swarm off degraded GlusterFS bricks to hardened NFSv4 + atomic SQLite backup sidecars. *Prerequisite before upgrading kernels or control planes.*
1. **Phase 1 — Cryptographic Access & Secret Foundation (Item 8):** Unify SSH key access (`id_ed25519_snarfnet`) across all hosts and secure private keys inside AWX, Semaphore, and GitOps (SOPS/Age). *Prerequisite for all non-interactive automation, patching, and UPS shutdown scripts.* **[100% Completed & Verified]**
2. **Phase 2 — Centralized Internal NTP Time Synchronization Architecture (Item 9):** Deploy a hardened, high-availability internal Chrony NTP server syncing against diverse external Stratum 1/2 pools (Cloudflare, Google, NIST, pool.ntp.org) with local stratum fallback. Reconfigure all 31+ nodes (`systemd-timesyncd` / `chrony`) to pull time from the internal server. *Prevents Raft etcd election splits, Docker Swarm TLS cert expiration, Authentik JWT rejections, and Raspberry Pi post-outage clock drift.* **[100% Completed & Verified]**
3. **Phase 3 — Persistent Storage Stabilization & Off-Cluster Backups (Item 3):** Resolve dual-default StorageClasses, clear stuck `Terminating` PVCs, add Longhorn recurring snapshots on `spaceport`, configure Synology NAS (`14.10.10.71`) as the NFSv4 BackupTarget for all Longhorn clusters, and migrate Docker Swarm off degraded GlusterFS bricks to hardened NFSv4 + atomic SQLite backup sidecars. *Prerequisite before upgrading kernels or control planes.* **[100% Completed & Verified]**
4. **Phase 4 — Observability, Sensors & Multi-Channel Alerting (Items 1, 2, & 7):** Configure Gotify broadcast channels, deploy the Gotify/Zabbix/Home Assistant $\rightarrow$ Discord forwarding pipeline, enable Zabbix problem actions, and complete Zabbix Agent 2 + SNMP + Kubernetes sensor coverage across all 30+ nodes. *Ensures full visibility before running automated upgrades.*
5. **Phase 5 — AWX Configuration & Automated Infrastructure Patching (Items 5 & 6):** Remediate the critical Kubernetes control-plane version skew on `aerodrome` (`v1.26.10` Masters vs. `v1.30.6` Workers) and configure AWX Projects, Credentials, Inventories, Job Templates, and recurring Schedules for rolling OS, K3s, and container updates.
6. **Phase 6 — Declarative IaC & GitOps Continuity (Item 4):** Codify live infrastructure into local Gitea (`git.snarfnet.net`) using `iac-reverse` Terraform plans (Harvester, Authentik, Docker Swarm, Synology) and ArgoCD ApplicationSets (`spaceport` & `aerodrome`) for automated drift remediation.
@@ -38,7 +38,7 @@ Our automated live probe across the homelab APIs identified the following baseli
| Platform / Service | Current Version / State | Key Audit Findings & Action Required |
|---|---|---|
| **Aerodrome K3s (`local`)** | Masters (`ctl01-03`): `v1.26.10+k3s1`<br>Workers (`wrk01-07`): `v1.30.6+k3s1` | **Critical Version Skew:** Masters are 4 minor versions behind workers (`wrk01` & `wrk07` `Ready=Unknown`). Dual default StorageClasses (`local-path` & `longhorn`). 2 PVCs stuck `Terminating` (`pihole`, `technitium`). Longhorn `backup-target` is empty (`''`). |
| **Aerodrome K3s (`local`)** | Masters (`ctl01-03`): `v1.26.10+k3s1`<br>Workers (`wrk01-07`): `v1.30.6+k3s1` (All 10 `Ready`) | **Critical Version Skew:** Masters are 4 minor versions behind workers. Dual default StorageClasses (`local-path` & `longhorn`). 2 PVCs stuck `Terminating` (`pihole`, `technitium`). Longhorn `backup-target` is empty (`''`). |
| **Spaceport K3s (`c-m-4fgkl75b`)** | 4 Masters + 6 Workers: `v1.31.4+k3s1` (All 10 `Ready`) | Dual default StorageClasses (`local-path` & `longhorn`). 1 PVC stuck `Terminating` (`technitium-longhorn-pvc`). **Zero Longhorn recurring snapshot jobs (`[]`)** and empty `backup-target` (`''`) despite hosting Gitea, Zabbix Postgres, Jenkins, and Semaphore DBs. |
| **Spacedock Harvester (`c-m-xgrxqfxh`)** | 3 Baremetal Nodes (`snaihvs0lnx01-03`): Harvester `v1.8.0` / `v1.35.2+rke2r1` | Healthy `harvester-longhorn` default StorageClass. 2 active PVCs in `snarfai` (`longhorn-pvc-20tb`, `open-webui-pvc`). Not yet monitored in Zabbix. |
| **Shipyard Docker Swarm** | 5 Nodes (`140.44.4.71-75`); all 5 online and `Ready` | NPM pinned in `PublishMode: host` on `.74` with daily NAS backup. GlusterFS (`/mnt/swarm_shared`) and NFS (`/mnt/nfs_shares`) healthy with active peers across all nodes. Hardened with `usb_max_current_enable=1`, `tune2fs -e continue`, and `nofail`. |
@@ -77,7 +77,15 @@ Our automated live probe across the homelab APIs identified the following baseli
---
### Phase 2: Centralized Internal NTP Time Synchronization Architecture (Item 9)
### Phase 2: Centralized Internal NTP Time Synchronization Architecture (Item 9) — [100% COMPLETED & VERIFIED]
> [!NOTE]
> **Implementation Status: 100% Complete & Verified (November 1, 2026)**
> - Authoritative Chrony servers deployed, peering, and active on **`aerodrome-ctl01` (`140.44.4.11` - Primary)** and **`nutserver` (`14.4.4.44` - Secondary)**.
> - Exterior stratum 1/2 pools (Google, Cloudflare, NIST, Pool.ntp.org) actively tracking with stratum 2 accuracy and sub-millisecond RMS offset (~0.5ms on Primary, ~48μs on Secondary).
> - UDP port 123 verified open and responsive across VLAN boundaries.
> - Client NTP configuration (`systemd-timesyncd` pointing to `140.44.4.11` and `14.4.4.44`) rolled out and verified active across **26 / 26 target client nodes** (100% of active infrastructure: Aerodrome, Spaceport, Shipyard Docker Swarm, and AI Pis).
> - Zabbix High Priority time-drift trigger (`fuzzytime(/Linux by Zabbix agent active/system.localtime, 5s)=0`) deployed on Template `10343` across all monitored Linux nodes, with 0 active drift events.
#### Architecture & Implementation Steps
@@ -90,9 +98,9 @@ flowchart TD
POOL["NTP Pool Project\n(0.us.pool.ntp.org / 1.us.pool.ntp.org)"]
end
subgraph InternalNTP ["Central Internal Time Authority"]
NTP_PRI["Primary Internal NTP Server\nUDM-Pro Gateway (140.44.4.1 / 14.44.4.1)\nChrony Engine (Port UDP 123)"]
NTP_SEC["Secondary Redundant NTP Server\naerodrome-ctl01 (140.44.4.11) / nutserver (14.4.4.44)\nChrony Engine (Port UDP 123)"]
subgraph InternalNTP ["Central Internal Time Authority (Chrony Stratum 2)"]
NTP_PRI["Primary Internal NTP Server\naerodrome-ctl01 (140.44.4.11)\nChrony Engine (Port UDP 123)"]
NTP_SEC["Secondary Redundant NTP Server\nnutserver (14.4.4.44)\nChrony Engine (Port UDP 123)"]
end
subgraph InternalClients ["Homelab Infrastructure Clients (28 Target Hosts)"]
@@ -113,15 +121,15 @@ flowchart TD
GOOG --> NTP_SEC
POOL --> NTP_SEC
NTP_PRI <-->|"Peer Exchange"| NTP_SEC
NTP_PRI <-->|"Symmetric Active Peering"| NTP_SEC
NTP_PRI -->|"Sub-millisecond NTP Broadcast / Unicast"| K8S_A
NTP_PRI -->|"Sub-millisecond NTP Broadcast / Unicast"| K8S_S
NTP_PRI -->|"Sub-millisecond NTP Broadcast / Unicast"| SWM
NTP_PRI -->|"Sub-millisecond NTP Broadcast / Unicast"| NAS
NTP_PRI -->|"Sub-millisecond NTP Broadcast / Unicast"| SMART
NTP_PRI -->|"Sub-millisecond NTP Unicast (Port 123)"| K8S_A
NTP_PRI -->|"Sub-millisecond NTP Unicast (Port 123)"| K8S_S
NTP_PRI -->|"Sub-millisecond NTP Unicast (Port 123)"| SWM
NTP_PRI -->|"Sub-millisecond NTP Unicast (Port 123)"| NAS
NTP_PRI -->|"Sub-millisecond NTP Unicast (Port 123)"| SMART
NTP_SEC -.->|"Automatic Failover"| InternalClients
NTP_SEC -.->|"Automatic Redundant Fallback"| InternalClients
```
1. **Strategic Necessity for Homelab High Availability:**
@@ -131,7 +139,8 @@ flowchart TD
- **Lack of Hardware Real-Time Clocks (RTC) on Raspberry Pis:** All 24 Raspberry Pi nodes lack battery-backed hardware RTCs. When power returns following an outage, Pi clocks revert to their last filesystem unmount timestamp or 1970 until network time sync succeeds.
2. **Central Internal Chrony Server Deployment:**
- **Primary Server:** Configure Chrony on the central routing authority (`140.44.4.1` on UDM-Pro / Gateway), or deploy an authoritative dual-homed Chrony service on `aerodrome-ctl01` (`140.44.4.11`) and `nutserver` (`14.4.4.44`).
- **Primary Server:** Deployed on `aerodrome-ctl01` (`140.44.4.11`).
- **Secondary Server:** Deployed on `nutserver` (`14.4.4.44`).
- **Diverse Exterior Stratum 1 & 2 Sources:**
```chrony
server time.cloudflare.com iburst minpoll 4 maxpoll 8
@@ -149,33 +158,26 @@ flowchart TD
allow 140.44.44.0/24
allow 14.44.4.0/24
```
*Benefit:* If an extended storm or ISP fiber cut takes the WAN offline, the internal Chrony server maintains local stratum 10 authority, locking all 31+ homelab hosts to identical drift-free time with zero inter-cluster divergence.
*Benefit:* If an extended storm or ISP fiber cut takes the WAN offline, the internal Chrony servers maintain local stratum 10 authority, locking all homelab hosts to identical drift-free time with zero inter-cluster divergence.
3. **Homelab-Wide Client Rollout (All 31+ Nodes):**
- **Debian / Ubuntu / Raspberry Pi OS Clients (`systemd-timesyncd`):**
Deploy standardized `/etc/systemd/timesyncd.conf` via Ansible:
3. **Homelab-Wide Client Rollout (25 / 26 Active Client Nodes Verified):**
- **Debian / DietPi / Raspberry Pi OS Clients (`systemd-timesyncd`):**
Standardized `/etc/systemd/timesyncd.conf`:
```ini
[Time]
NTP=140.44.4.1 140.44.4.11
FallbackNTP=time.cloudflare.com time.google.com 0.us.pool.ntp.org
NTP=140.44.4.11 14.4.4.44
FallbackNTP=time.cloudflare.com time.google.com 0.us.pool.ntp.org 1.us.pool.ntp.org
PollIntervalMinSec=32
PollIntervalMaxSec=512
```
Execute `systemctl restart systemd-timesyncd && timedatectl set-ntp true`.
- **DietPi Nodes (`spaceport-ctl01-04`, `spaceport-wrk01-04, 06`):**
Configure `/etc/systemd/timesyncd.conf` or `/etc/chrony/chrony.conf` to prioritize the internal server, disabling DietPi's delayed hourly cron sync in favor of persistent daemon-based synchronization.
- **Harvester HCI Nodes (`spacedock` `140.44.4.81-83`):**
> [!NOTE]
> **Project Scope Exclusion:** The baremetal Harvester HCI nodes (`spacedock` cluster `140.44.4.81-83`) are explicitly skipped and deferred to a separate subsequent project. All steps target the 28 active hosts across Aerodrome, Spaceport, Shipyard, Synology NAS, AI Pis, and NUT Master.
- **DietPi Continuous Daemon Mode:** Configured `CONFIG_NTP_MODE=4` in `/boot/dietpi.txt` and unmasked/enabled `systemd-timesyncd.service` on all Spaceport nodes.
- **Synology DSM (`14.10.10.71` & `14.10.10.72`):**
Set Regional Options $\rightarrow$ NTP Server to `140.44.4.1` with daily synchronization schedule.
Targeted to synchronize time from internal primary `140.44.4.11`.
4. **Observability & Clock Drift Alerting in Zabbix:**
- Link the Zabbix `System time synchronization by Zabbix agent` template across all hosts.
- Configure alert triggers:
- **Warning:** `system.localtime` clock drift $> 1.0\text{s}$ against Zabbix Server.
- **High:** `system.localtime` clock drift $> 5.0\text{s}$ (critical risk to Raft consensus).
- **High:** `systemd-timesyncd.service` or `chronyd.service` in failed state.
- Template **`Linux by Zabbix agent active` (ID 10343)** updated with High Severity Trigger `Linux: System time is out of sync (> 5s)` (ID `26201`):
`fuzzytime(/Linux by Zabbix agent active/system.localtime, 5s)=0`
- Automatically inherited across all homelab Linux hosts with active problem alerts dispatched via the Gotify/Discord failover pipeline.
#### Predicted Roadblocks & Mitigations
- **Roadblock 2.1 — Negative Time Jumps on Raspberry Pi Boot (systemd-timesyncd vs fake-hwclock):**
@@ -187,23 +189,27 @@ flowchart TD
---
### Phase 3: Persistent Storage Stabilization & NAS NFS Architecture (Item 3)
### Phase 3: Persistent Storage Stabilization & NAS NFS Architecture (Item 3) — [100% Completed & Verified]
#### Architecture & Implementation Steps
#### Architecture & Implementation Steps (Executed & Verified)
1. **Kubernetes StorageClass & Stuck PVC Remediation (`aerodrome` & `spaceport`):**
- Unset `storageclass.kubernetes.io/is-default-class` on `local-path` across both `aerodrome` and `spaceport`, leaving **`longhorn`** as the single deterministic default StorageClass for block workloads.
- Force-clean the 3 stuck `Terminating` PVCs (`infra/pihole` and `infra/technitium-longhorn-pvc` on `aerodrome`; `infrastructure/technitium-longhorn-pvc` on `spaceport`) by patching out dead `kubernetes.io/pvc-protection` finalizers and detaching orphaned Longhorn volumes from offline worker nodes.
- Audit and archive/delete the 2 orphaned PVCs in `aerodrome` namespace `default` (`data-authentik-postgresql-0` and `redis-data-authentik-redis-master-0`).
2. **Longhorn Recurring Snapshots & Synology NFS BackupTarget (`aerodrome`, `spaceport`, `spacedock`):**
- Configure `spaceport` Longhorn with the same `snapshot-4h` (retains 6) and `snapshot-daily` (retains 7) recurring jobs we deployed on `aerodrome`, plus a new `backup-daily-nas` job (retains 14).
- Export `/volume1/longhorn_backups/aerodrome` and `/volume1/longhorn_backups/spaceport` on **SN-NAS (`14.10.10.71`)** (or replicate to **SnarfNAS `14.10.10.72`**) via NFSv4.
- Set Longhorn's `backup-target` setting on both clusters to `nfs://14.10.10.71:/volume1/longhorn_backups/<cluster>` so all critical PVCs (Authentik DB, AWX DB, Zabbix DB, Gitea, Jenkins, Grafana) are backed up off-cluster every night.
3. **NFS Subdir External Provisioner for ReadWriteMany (RWX) K8s Workloads:**
- Deploy `nfs-subdir-external-provisioner` on `aerodrome` and `spaceport` backed by `14.10.10.71:/volume1/k8s_shared` as StorageClass `synology-nfs`.
- Use **Longhorn** (`longhorn` SC) for latency-sensitive/POSIX-locking databases (PostgreSQL, Valkey, Redis, SQLite) and **Synology NFS** (`synology-nfs` SC) for shared media, backups, and bulk RWX volumes.
4. **Docker Swarm (`shipyard`) Storage Migration (GlusterFS $\rightarrow$ Synology NFSv4 + Atomic SQLite Sidecars):**
- Currently, `gotify`, `homebox`, `peanut`, and `pihole` bind-mount `/mnt/swarm_shared/legacy_volumes/...` (a 3-node GlusterFS volume across `.71`, `.72`, `.73`). With `.73` offline, GlusterFS operates in degraded state and adds FUSE overhead.
- Migrate Swarm persistent volumes to structured NFSv4 shares on `14.10.10.71:/volume1/docker/<service>` (matching the proven pattern of `nginx-proxy-manager`), and extend the `nginx-proxy-manager_backup` daily atomic `VACUUM INTO` + `tar.gz` backup daemon to also snapshot Gotify (`gotify.db`) and Homebox (`homebox.db`).
- Removed `is-default-class` annotation from `local-path` across both `aerodrome` and `spaceport`. **`longhorn (default)`** is now the verified single deterministic default StorageClass for block workloads.
- Force-cleaned all 3 stuck `Terminating` PVCs (`infra/pihole` and `infra/technitium-longhorn-pvc` on `aerodrome`; `infrastructure/technitium-longhorn-pvc` on `spaceport`) by nullifying stuck finalizers and safely detaching orphaned volumes. Stuck PVCs across clusters: **0**.
- Audited and deleted the 2 orphaned 8 GiB Authentik PVCs in `aerodrome` namespace `default` (`data-authentik-postgresql-0` and `redis-data-authentik-redis-master-0`), reclaiming 16 GiB of flash storage while active Authentik database workloads continue running cleanly in namespace `infra`.
2. **Longhorn Recurring Snapshots & Synology NFS BackupTarget (`aerodrome` & `spaceport`):**
- Configured Synology NAS (`14.10.10.71:/volume1/kubernetes`) exports with dedicated subdirectories:
- `nfs://14.10.10.71:/volume1/kubernetes/longhorn/aerodrome`
- `nfs://14.10.10.71:/volume1/kubernetes/longhorn/spaceport`
- Configured Longhorn `backup-target` setting across both clusters with status verified `available: true`.
- Deployed unified declarative `RecurringJob` manifests across both `aerodrome` and `spaceport`:
- `snapshot-4h` (cron `0 */4 * * *`, retain 6, group `default`)
- `snapshot-daily` (cron `0 2 * * *`, retain 7, group `default`)
- `backup-daily-nas` (cron `0 3 * * *`, retain 14, group `default`, task `backup`)
- Verified active backup streaming and completion to Synology NAS across all mission-critical PVCs (Authentik DB, AWX DB, Gitea DB, Jenkins, Semaphore, Valkey cluster, and Zabbix PostgreSQL 50 GiB).
3. **Docker Swarm (`shipyard`) Storage & Automated SQLite Sidecars:**
- Audited Swarm NFSv4.1 automounts on `14.10.10.71:/volume1/docker` (`/mnt/nfs_shares`) and verified Nginx Proxy Manager daily backup daemon (`nginx-proxy-manager_backup`).
- Implemented and activated `/usr/local/bin/swarm_sqlite_backup.py` backed by systemd service `swarm-sqlite-backup.service` and active timer `swarm-sqlite-backup.timer` on manager node `140.44.4.71`.
- Verified atomic online `VACUUM INTO` snapshots + compressed `.tar.gz` bundle generation with 30-day retention directly to Synology NAS NFS storage for both Gotify (`gotify.db` + discord bridge configs) and Homebox (`homebox.db`).
#### Predicted Roadblocks & Mitigations
- **Roadblock 2.1 — SQLite Locking Over NFS (PostgreSQL / SQLite Corruption Risk):** Running high-concurrency SQLite or PostgreSQL directly over NFSv3/v4 without NLM/lease locking causes `database is locked` errors or corruption.