Daniel Barlow
7e2b0068e6
There is nothing in this commit except for the changes made by nix-shell -p nixfmt-rfc-style --run "nixfmt ." If this has mucked up your open branches then sorry about that. You can probably nixfmt them to match before merging
49 lines
1.4 KiB
Nix
49 lines
1.4 KiB
Nix
## Health check
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##
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## Runs a service and a separate periodic health process. When the
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## health check starts failing over a period of time, kill the service.
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## (Usually that means the supervisor will restart it, but you can
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## have other behaviours by e.g. combining this service with a round-robin
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## for failover)
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{
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lib,
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pkgs,
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config,
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...
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}:
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let
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inherit (lib) mkOption types;
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inherit (pkgs) liminix;
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in
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# inherit (pkgs.liminix.services) longrun;
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{
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options = {
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system.service.health-check = mkOption {
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description = "run a service while periodically checking it is healthy";
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type = liminix.lib.types.serviceDefn;
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};
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};
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config.system.service.health-check = config.system.callService ./service.nix {
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service = mkOption {
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type = liminix.lib.types.service;
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};
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interval = mkOption {
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description = "interval between checks, in seconds";
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type = types.int;
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default = 10;
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example = 10;
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};
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threshold = mkOption {
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description = "number of consecutive failures required for the service to be kicked";
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type = types.int;
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example = 3;
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};
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healthCheck = mkOption {
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description = "health check command or script. Expected to exit 0 if the service is healthy or any other exit status otherwise";
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type = types.path;
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};
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};
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config.programs.busybox.applets = [ "expr" ];
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}
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