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fix: allow HAProxy to start with unresolved inactive backend

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NetworkCats
2026-03-08 03:02:10 +08:00
parent f0b6a18083
commit bc282c4279
1 changed files with 11 additions and 2 deletions
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deploy/ansible/roles/app/templates/haproxy.cfg.j2
+11 -2
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@@ -65,11 +65,20 @@ frontend https_in
backend global_rate_tracking
stick-table type string len 6 size 1 expire 10m store http_req_rate(1s)
resolvers docker_dns
nameserver dns1 127.0.0.11:53
resolve_retries 3
timeout resolve 1s
timeout retry 1s
hold valid 10s
hold nx 5s
backend app
balance roundrobin
option httpchk GET /health
http-check expect status 200
# Blue-green backends: only the active color is enabled
server blue app-blue:3000 check inter 2s fall 3 rise 2 {{ 'disabled' if active_color == 'green' else '' }}
server green app-green:3000 check inter 2s fall 3 rise 2 {{ 'disabled' if active_color == 'blue' else '' }}
# init-addr none allows HAProxy to start when the inactive container does not exist
server blue app-blue:3000 resolvers docker_dns check inter 2s fall 3 rise 2 init-addr none {{ 'disabled' if active_color == 'green' else '' }}
server green app-green:3000 resolvers docker_dns check inter 2s fall 3 rise 2 init-addr none {{ 'disabled' if active_color == 'blue' else '' }}