f2fd8f6835
git-subtree-dir: observability git-subtree-mainline:ae1d9bb534git-subtree-split:19e74af9ca
48 lines
2 KiB
YAML
48 lines
2 KiB
YAML
# The Alloy log-collector agent. Runs on EACH node (prod, beta, LAN dev) — one
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# per node — reading that node's Docker containers, Caddy logs, and the app's
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# JSON logs, and shipping them to the central Loki on beta over the mesh.
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#
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# Per-node config comes from the environment (an .env file next to this, or
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# exported before `up`):
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# ALLOY_NODE this node's label: prod | beta | dev
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# LOKI_URL push endpoint. All nodes push over the mesh:
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# http://10.10.0.2:3100/loki/api/v1/push
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#
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# Deploy on a node:
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# ALLOY_NODE=prod LOKI_URL=http://10.10.0.2:3100/loki/api/v1/push \
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# docker compose -f docker-compose.agent.yml up -d
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#
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# The app's JSON logs are read from its `applogs` Docker volume, named
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# `<project>_applogs`. prod and beta run the app under the compose project
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# `thermograph`, so the external volume below is `thermograph_applogs`. The LAN
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# dev stack uses the project `thermograph-dev` — on that node, change the two
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# `thermograph_applogs` references below to `thermograph-dev_applogs`.
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services:
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alloy:
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image: grafana/alloy:v1.9.1
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command:
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- run
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- /etc/alloy/config.alloy
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- --storage.path=/var/lib/alloy/data
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- --server.http.listen-addr=0.0.0.0:12345
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environment:
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ALLOY_NODE: ${ALLOY_NODE:?set ALLOY_NODE (prod|beta|dev)}
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LOKI_URL: ${LOKI_URL:?set LOKI_URL}
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volumes:
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- ./config.alloy:/etc/alloy/config.alloy:ro
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# Read-only Docker socket: discover + tail every container's stdout/stderr.
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- /var/run/docker.sock:/var/run/docker.sock:ro
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# Caddy's host access logs (runs on the host, not a container).
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- /var/log/caddy:/var/log/caddy:ro
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# The app's structured JSON logs, straight off its named volume.
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- thermograph_applogs:/applogs:ro
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- alloy_data:/var/lib/alloy/data
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restart: unless-stopped
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volumes:
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# The app's existing log volume (created by the app's own stack). external:true
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# means compose references it, never creates or deletes it.
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thermograph_applogs:
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external: true
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alloy_data: {}
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