From af983c7e662fb28df0353298fe0ee89edfc15074 Mon Sep 17 00:00:00 2001 From: Aayush Gupta Date: Fri, 1 Dec 2023 18:34:32 +0530 Subject: [PATCH] use node:net to directly send 4lw commands for zookeeper health check Signed-off-by: Aayush Gupta --- package-lock.json | 377 ++---------------------------------------- package.json | 3 +- server/util-server.js | 62 ++++--- 3 files changed, 53 insertions(+), 389 deletions(-) diff --git a/package-lock.json b/package-lock.json index 17d352d98..cf5ff68cf 100644 --- a/package-lock.json +++ b/package-lock.json @@ -78,8 +78,7 @@ "tcp-ping": "~0.1.1", "thirty-two": "~1.0.2", "tough-cookie": "~4.1.3", - "ws": "^8.13.0", - "zookeeper": "^6.0.0" + "ws": "^8.13.0" }, "devDependencies": { "@actions/github": "~5.0.1", @@ -5187,7 +5186,8 @@ "node_modules/async": { "version": "3.2.5", "resolved": "https://registry.npmjs.org/async/-/async-3.2.5.tgz", - "integrity": "sha512-baNZyqaaLhyLVKm/DlvdW051MSgO6b8eVfIezl9E5PqWxFgzLm/wQntEW4zOytVburDEr0JlALEpdOFwvErLsg==" + "integrity": "sha512-baNZyqaaLhyLVKm/DlvdW051MSgO6b8eVfIezl9E5PqWxFgzLm/wQntEW4zOytVburDEr0JlALEpdOFwvErLsg==", + "dev": true }, "node_modules/asynckit": { "version": "0.4.0", @@ -5738,24 +5738,11 @@ "ieee754": "^1.1.13" } }, - 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"util-deprecate": "~1.0.1" - } - }, - "node_modules/tar-stream/node_modules/string_decoder": { - "version": "1.1.1", - "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz", - "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==", - "dependencies": { - "safe-buffer": "~5.1.0" - } - }, "node_modules/tar/node_modules/minipass": { "version": "5.0.0", "resolved": "https://registry.npmjs.org/minipass/-/minipass-5.0.0.tgz", @@ -15596,7 +15280,8 @@ "node_modules/through": { "version": "2.3.8", "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz", - "integrity": "sha512-w89qg7PI8wAdvX60bMDP+bFoD5Dvhm9oLheFp5O4a2QF0cSBGsBX4qZmadPMvVqlLJBBci+WqGGOAPvcDeNSVg==" + "integrity": "sha512-w89qg7PI8wAdvX60bMDP+bFoD5Dvhm9oLheFp5O4a2QF0cSBGsBX4qZmadPMvVqlLJBBci+WqGGOAPvcDeNSVg==", + "dev": true }, "node_modules/tildify": { "version": "2.0.0", @@ -15630,11 +15315,6 @@ "integrity": "sha512-3f0uOEAQwIqGuWW2MVzYg8fV/QNnc/IpuJNG837rLuczAaLVHslWHZQj4IGiEl5Hs3kkbhwL9Ab7Hrsmuj+Smw==", "dev": true }, - 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}, - "node_modules/zookeeper": { - "version": "6.0.0", - "resolved": "https://registry.npmjs.org/zookeeper/-/zookeeper-6.0.0.tgz", - "integrity": "sha512-Z35PpQ8aKmkKaGwtMHRJecobeNXDMIQiH3wkJYe7/Zn8Cps9SFd+gc/r24YXzb5y02IDBa7tkZKnekRZgx9tGA==", - "hasInstallScript": true, - "dependencies": { - "async": "3.2.x", - "decompress": "4.2.x", - "decompress-targz": "4.1.x", - "nan": "2.x", - "node-gyp-build": "^4.2.3", - "shelljs": "0.8.x" - }, - "engines": { - "node": ">=14.15.4" - } } } } diff --git a/package.json b/package.json index ac51bdcee..d462eeed1 100644 --- a/package.json +++ b/package.json @@ -143,8 +143,7 @@ "tcp-ping": "~0.1.1", "thirty-two": "~1.0.2", "tough-cookie": "~4.1.3", - "ws": "^8.13.0", - "zookeeper": "^6.0.0" + "ws": "^8.13.0" }, "devDependencies": { "@actions/github": "~5.0.1", diff --git a/server/util-server.js b/server/util-server.js index 448e2132a..2862c17a9 100644 --- a/server/util-server.js +++ b/server/util-server.js @@ -23,7 +23,7 @@ const radiusClient = require("node-radius-client"); const redis = require("redis"); const oidc = require("openid-client"); const tls = require("tls"); -const ZooKeeper = require("zookeeper"); +const net = require("node:net"); const { dictionaries: { @@ -1167,38 +1167,48 @@ module.exports.axiosAbortSignal = (timeoutMs) => { }; /** - * Attempt to connect to the given zookeeper host under the given timeout. + * Connects to zookeeper host and sends "ruok", if response is "imok", then host is UP. * @param {string} zookeeperHost - The connection string for a single host in the form 'host:port' * @param {number} timeoutMs - Timeout in milliseconds under which connection must be established. - * @returns {Promise} The result of connection attempt + * @returns {Promise} The result of connection check */ exports.zookeeperConnect = function (zookeeperHost, timeoutMs = 5000) { + const hostPort = zookeeperHost.split(":"); + const host = hostPort.shift(); + const port = hostPort.shift(); + return new Promise((resolve, reject) => { - // Seems like zookeeper client behavior is to retry indefitiely on timeout. - // So, an explicit timer is needed to prevent the monitor from getting stuck. - const timer = setTimeout(() => { - reject(Error("Zookeeper operation timed out")); - }, timeoutMs); + let socket = net.connect({ + host: host, + port: port, + timeout: timeoutMs, + onread: { + buffer: Buffer.alloc(1 * 1024), // 1KB fixed to cap very large response + callback: function (nread, buf) { + let response = buf.toString("utf8", 0, nread); + log.debug("zookeeper", `got response: [${response}]`); + if (response === "imok") { + resolve("imok"); + } else { + reject(Error("zookeeper did not respond with imok")); + } + }, + }, + }); - const config = { - connect: zookeeperHost, - timeout: timeoutMs, // Causes the client to retry and does not fail. - debug_level: ZooKeeper.ZOO_LOG_LEVEL_WARN, - host_order_deterministic: false, - }; + socket.once("error", function (err) { + log.debug("zookeeper", `error connecting to zookeeper [${err.message}]`); + reject(err); + }); - const client = new ZooKeeper(config); - - client.connect(config, (err, _) => { - if (err) { - clearTimeout(timer); - reject(err); - } else { - clearTimeout(timer); - resolve("Successfully connected"); - } - - client.close(); + socket.on("connect", function () { + log.debug("zookeeper", `connected to zookeeper: ${host}:${port}`); + socket.write(`ruok\n`, (err) => { + if (err) { + log.debug("zookeeper", `error while writing to host [${err.message}]`); + reject(err); + } + }); }); }); };