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redis-cluster: run create cluster only if it is not already initalised (#97)

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Shivaraj B H 2024-02-13 19:24:08 +05:30 committed by GitHub
parent 3c3a6f03a2
commit 63ff90eed9
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1 changed files with 18 additions and 1 deletions
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19
nix/redis-cluster.nix
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@ -120,12 +120,29 @@ in
availability.restart = "on_failure";
};
hosts = lib.mapAttrsToList (_: cfg: "${config.bind}:${builtins.toString cfg.port}") config.nodes;
clusterCreateScript = pkgs.writeShellApplication {
name = "redis-cluster-create";
text =
let
primaryNodePort = (lib.head (lib.mapAttrsToList lib.nameValuePair config.nodes)).value.port;
in
''
if ${config.package}/bin/redis-cli --cluster check ${config.bind}:${builtins.toString primaryNodePort}; then
echo
echo
echo "redis-cluster is already created; Skipping initialization"
else
${config.package}/bin/redis-cli --cluster create ${lib.concatStringsSep " " hosts} --cluster-replicas ${builtins.toString config.replicas} --cluster-yes
fi
'';
};
in
{
processes = (lib.mapAttrs' mkNodeProcess config.nodes) // {
"${name}-cluster-create" = {
depends_on = lib.mapAttrs' (nodeName: cfg: lib.nameValuePair "${name}-${nodeName}" { condition = "process_healthy"; }) config.nodes;
command = "${config.package}/bin/redis-cli --cluster create ${lib.concatStringsSep " " hosts} --cluster-replicas ${builtins.toString config.replicas} --cluster-yes";
command = lib.getExe clusterCreateScript;
namespace = name;
};
};