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modules/consul-distributed-services: wait for consul to start

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This commit is contained in:
Max Headroom 2023-09-05 00:30:34 +02:00
parent 5267d14b48
commit 4cf87bac0e
1 changed files with 7 additions and 0 deletions
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7
modules/consul-distributed-services/default.nix
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@ -34,9 +34,16 @@ in
''${@}
'';
waitForConsul = pkgs.writeShellScript "wait-for-consul" ''
while ! ${consul}/bin/consul lock --name="pre-flight-check" --n=${toString cfg.replicas} --shell=false "$1" ${pkgs.coreutils}/bin/true; do
sleep 1
done
'';
hasSpecialPrefix = elem (substring 0 1 ExecStart) [ "@" "-" ":" "+" "!" ];
in assert !hasSpecialPrefix; pkgs.writeTextDir "etc/systemd/system/${n}.service.d/distributed.conf" ''
[Service]
ExecStartPre=${waitForConsul} 'services/${n}%i'
ExecStart=
ExecStart=${consul}/bin/consul lock --name=${n} --n=${toString cfg.replicas} --shell=false --child-exit-code 'services/${n}%i' ${optionalString (cfg.registerService != null) runWithRegistration} ${ExecStart}
Environment="CONSUL_HTTP_ADDR=${consulHttpAddr}"