Kubernetes MCP Server

Instructions

Implementation Reference

• server.js:2142-2151 (handler)

  The handler logic for the 'helm-upgrade' tool. It constructs a 'helm upgrade' command using the provided release name, chart, namespace, and values, executes it via execAsync, and returns the stdout or a success message.

  case "helm-upgrade": {
    const { name, chart, namespace, values } = args;
    const nsArg = namespace ? `-n ${namespace}` : "";
    const valuesArg = values ? `-f <(echo '${values}')` : "";
    const cmd = `helm upgrade ${name} ${chart} ${nsArg} ${valuesArg}`;
    const { stdout } = await execAsync(cmd);
    return {
      content: [{ type: "text", text: stdout || `Helm release ${name} upgraded` }]
    };
  }

• server.js:1208-1233 (registration)

  The tool registration entry in the 'tools' array, including name, description, and inputSchema which defines the parameters for the helm-upgrade tool.

  {
    name: "helm-upgrade",
    description: "Upgrade a Helm release",
    inputSchema: {
      type: "object",
      properties: {
        name: { 
          type: "string",
          description: "The name of the release"
        },
        chart: { 
          type: "string",
          description: "The chart reference (repo/chart or path)"
        },
        namespace: { 
          type: "string",
          description: "The namespace of the release (optional, defaults to current context namespace)"
        },
        values: { 
          type: "string",
          description: "Values to override (YAML string)"
        }
      },
      required: ["name", "chart"]
    }
  },

• server.js:1211-1232 (schema)

  The inputSchema definition for the helm-upgrade tool, specifying the structure and requirements for input arguments.

  inputSchema: {
    type: "object",
    properties: {
      name: { 
        type: "string",
        description: "The name of the release"
      },
      chart: { 
        type: "string",
        description: "The chart reference (repo/chart or path)"
      },
      namespace: { 
        type: "string",
        description: "The namespace of the release (optional, defaults to current context namespace)"
      },
      values: { 
        type: "string",
        description: "Values to override (YAML string)"
      }
    },
    required: ["name", "chart"]
  }