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kevinveenbirkenbachandClaude Opus 5
4986e80dd4
The Production block never set one. inventory provision writes only
ansible_connection for a local host, so DOMAIN_PRIMARY stayed at the
group_vars default of infinito.localhost and the deployment served a zone its
own resolver knows nothing about. CoreDNS templates answers for
INFINITO_DOMAIN_RE and nothing else, so every lookup of the deployment's own
name came back NXDOMAIN.
Mastodon is where that surfaced. tootctl accounts create validates the address
through EmailMxValidator, which resolves MX and then, for the domain itself,
A and AAAA. All six queries returned NXDOMAIN in run 33574056480, the
validator recorded email :unreachable, and the admin account was never created.
Only the guide rows were affected: the matrix rows write
DOMAIN_PRIMARY: "{{ lookup('env', 'INFINITO_DOMAIN') }}" into their host_vars
and resolve fine.
The template now carries DOMAIN=<your-domain> in both the host and the
container form and threads it into --vars, with the container form passing it
through the docker run boundary as well. The two guide runners substitute it
the way they already substitute the SSH key, so the replay deploys under
INFINITO_DOMAIN like every other CI deploy. compose_deploy.sh moves its env
load ahead of the substitutions to have the value; host_deploy.sh had no env
load at all.
A production reader is asked for a domain now instead of silently inheriting
infinito.localhost, which no real deployment wants either. The shipped default
keeps its value: sys-svc-nss documents that *.localhost resolves through the
myhostname NSS module without any zone, and host-side tasks lean on it.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
98 lines
4.1 KiB
Markdown
98 lines
4.1 KiB
Markdown
# Docker Registry Cache
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## Description
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Cluster-local Docker Hub pull-through cache. Worker nodes pull base images via
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this mirror instead of going to `registry-1.docker.io` for every node,
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eliminating duplicate network transfers and avoiding Docker Hub rate limits.
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## Overview
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The role deploys a single `registry:2` instance in pull-through proxy mode on its inventory
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group's host. Because the group typically holds exactly one host (the swarm
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manager), `DEPLOYMENT_MODE` resolves to `compose` for the role; multi-host
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fan-out for the cache itself is out of scope for v1.
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Any host that should consume the cache joins the role's group as well. The
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shared daemon.json template then emits a `registry-mirrors` block pointing at
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`http://<cache-host>:<cache-port>` plus an `insecure-registries` entry so
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plain-HTTP communication with the cache is permitted.
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## Cosmos
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The diagram places Docker Registry Cache in the Infinito.Nexus cosmos: the components it deploys (capabilities), the central services it consumes (dependencies), and its outward reach (federation and bridged external networks).
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```mermaid
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flowchart LR
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subgraph deps [Dependencies]
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dep_svc_bkp_volume_2_local["svc-bkp-volume-2-local 💻"]
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dep_svc_swarm_node["svc-swarm-node 💻"]
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end
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subgraph role [svc-registry-cache 🐳]
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svc_node["node"]
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svc_cache["cache"]
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svc_container_backup["container_backup"]
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end
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dep_svc_bkp_volume_2_local -- "1:1" --> svc_container_backup
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dep_svc_swarm_node -- "1:1" --> svc_node
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```
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Solid `1:1` edges are fixed relationships; dashed `0..1` edges are conditional (enabled only in matching deployments); red `0..0` edges are turned off in this role. Node markers show the role's deploy modes (💻 host, 🐳 compose, 🐝 swarm); ❌ marks a service that is explicitly turned off, and ⚙️ an Ansible role dependency declared in `meta/main.yml`.
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## Features
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- Transparent Docker Hub mirror via `registry:2`'s built-in proxy mode.
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- Idempotent: subsequent role runs reuse the populated cache volume.
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- Zero per-image configuration: any image normally pulled from Docker Hub is
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cached on first access and served from local disk afterwards.
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- First pull of any image: cache miss, fetched upstream, persisted to disk.
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- Subsequent pulls of the same image from any node: served from local cache
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over LAN. On a 3-node cluster pulling identical base images this is the
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difference between three full Hub downloads and one Hub download plus two
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LAN copies.
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## Quick Setup
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### Development
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Clone, set up the workstation, and deploy Docker Registry Cache onto the local stack:
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```bash
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git clone https://github.com/infinito-nexus/core.git
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cd core
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make onboard
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make compose-deploy mode=reinstall apps=svc-registry-cache full_cycle=false
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```
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### Production
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Run the published image to provision the inventory and deploy Docker Registry Cache to a managed server (the mounted volume persists the inventory):
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```bash
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APP=svc-registry-cache
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HOST=<your-server>
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DOMAIN=<your-domain>
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TLS_MODE=self_signed
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SSH_PUBLIC_KEY="<your-ssh-public-key>"
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docker run --rm -it \
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-v "$PWD/inventories:/etc/infinito.nexus/inventories" \
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-e APP="$APP" -e HOST="$HOST" -e DOMAIN="$DOMAIN" -e TLS_MODE="$TLS_MODE" -e SSH_PUBLIC_KEY="$SSH_PUBLIC_KEY" \
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ghcr.io/infinito-nexus/core/debian bash -c '
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INVENTORY=/etc/infinito.nexus/inventories/production
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infinito administration inventory provision "$INVENTORY" \
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--inventory-file "$INVENTORY/devices.yml" \
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--host "$HOST" \
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--include "$APP" \
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--vars "{\"TLS_MODE\": \"$TLS_MODE\", \"DOMAIN_PRIMARY\": \"$DOMAIN\", \"users\": {\"administrator\": {\"authorized_keys\": [\"$SSH_PUBLIC_KEY\"]}}}" &&
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infinito administration deploy dedicated "$INVENTORY/devices.yml" \
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--password-file "$INVENTORY/.password" \
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--diff -vv'
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```
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## Credits
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Implemented by **[Kevin Veen-Birkenbach](https://www.veen.world)**.
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Part of the [Infinito.Nexus Project](https://s.infinito.nexus/code) and maintained by [Kevin Veen-Birkenbach](https://www.veen.world).
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Licensed under the [Infinito.Nexus Community License (Non-Commercial)](https://s.infinito.nexus/license).
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