Support for publish_address as hostname/ip:port

lib/ConnectionPool.d.ts

@@ -127,7 +127,7 @@ export default class ConnectionPool {
    * @param {object} nodes
    * @returns {array} hosts
    */
-  nodesToHost(nodes: any): any[];
+  nodesToHost(nodes: any, protocol: string): any[];
   /**
    * Transforms an url string to a host object
    *

lib/ConnectionPool.js

@@ -332,18 +332,33 @@ class ConnectionPool {
    * @param {object} nodes
    * @returns {array} hosts
    */
-  nodesToHost (nodes) {
+  nodesToHost (nodes, protocol) {
     const ids = Object.keys(nodes)
     const hosts = []
 
     for (var i = 0, len = ids.length; i < len; i++) {
       const node = nodes[ids[i]]
       // If there is no protocol in
-      // the `publish_address` new URL wil throw
+      // the `publish_address` new URL will throw
+      // the publish_address can have two forms:
+      //   - ip:port
+      //   - hostname/ip:port
+      // if we encounter the second case, we should
+      // use the hostname instead of the ip
       var address = node.http.publish_address
+      const hostAndIpRegex = /^[a-z0-9_.-]*\/\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b/gi
+      const match = address.match(hostAndIpRegex)
+      if (match !== null) {
+        const ipRegex = /\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b/
+        const ip = address.match(ipRegex)[0]
+        // extract the hostname, the -1 at the end removes the final /
+        const hostname = address.slice(0, address.indexOf(ip) - 1)
+        const port = address.split(':')[1]
+        address = `${hostname}:${port}`
+      }
       address = address.slice(0, 4) === 'http'
         ? address
-        : 'http://' + address
+        : `${protocol}//${address}`
       const roles = node.roles.reduce((acc, role) => {
         acc[role] = true
         return acc

lib/Transport.js

@@ -353,7 +353,8 @@ class Transport {
       }
 
       debug('Sniffing ended successfully', result.body)
-      const hosts = this.connectionPool.nodesToHost(result.body.nodes)
+      const protocol = result.meta.connection.url.protocol || 'http:'
+      const hosts = this.connectionPool.nodesToHost(result.body.nodes, protocol)
       this.connectionPool.update(hosts)
 
       result.meta.sniff = { hosts, reason }

test/behavior/sniff.test.js

@@ -93,6 +93,39 @@ test('Should update the connection pool', t => {
   })
 })
 
+test('Should handle hostnames in publish_address', t => {
+  t.plan(10)
+
+  buildCluster({ hostPublishAddress: true }, ({ nodes, shutdown }) => {
+    const client = new Client({
+      node: nodes[Object.keys(nodes)[0]].url
+    })
+    t.strictEqual(client.connectionPool.connections.size, 1)
+
+    client.on(events.SNIFF, (err, request) => {
+      t.error(err)
+      t.strictEqual(
+        request.meta.sniff.reason,
+        Transport.sniffReasons.DEFAULT
+      )
+    })
+
+    // run the sniffer
+    client.transport.sniff((err, hosts) => {
+      t.error(err)
+      t.strictEqual(hosts.length, 4)
+
+      for (var i = 0; i < hosts.length; i++) {
+        // the first node will be an update of the existing one
+        t.strictEqual(hosts[i].url.hostname, 'localhost')
+      }
+
+      t.strictEqual(client.connectionPool.connections.size, 4)
+    })
+    t.teardown(shutdown)
+  })
+})
+
 test('Sniff interval', t => {
   t.plan(10)
 

test/unit/connection-pool.test.js

@@ -282,41 +282,112 @@ test('API', t => {
   })
 
   t.test('nodesToHost', t => {
-    const pool = new ConnectionPool({ Connection })
-    const nodes = {
-      a1: {
-        http: {
-          publish_address: '127.0.0.1:9200'
-        },
-        roles: ['master', 'data', 'ingest']
-      },
-      a2: {
-        http: {
-          publish_address: '127.0.0.1:9202'
+    t.test('publish_address as ip address', t => {
+      const pool = new ConnectionPool({ Connection })
+      const nodes = {
+        a1: {
+          http: {
+            publish_address: '127.0.0.1:9200'
+          },
+          roles: ['master', 'data', 'ingest']
         },
-        roles: ['master', 'data', 'ingest']
+        a2: {
+          http: {
+            publish_address: '127.0.0.1:9201'
+          },
+          roles: ['master', 'data', 'ingest']
+        }
       }
-    }
 
-    t.deepEqual(pool.nodesToHost(nodes), [{
-      url: new URL('http://127.0.0.1:9200'),
-      id: 'a1',
-      roles: {
-        master: true,
-        data: true,
-        ingest: true,
-        ml: false
+      t.deepEqual(pool.nodesToHost(nodes, 'http:'), [{
+        url: new URL('http://127.0.0.1:9200'),
+        id: 'a1',
+        roles: {
+          master: true,
+          data: true,
+          ingest: true,
+          ml: false
+        }
+      }, {
+        url: new URL('http://127.0.0.1:9201'),
+        id: 'a2',
+        roles: {
+          master: true,
+          data: true,
+          ingest: true,
+          ml: false
+        }
+      }])
+
+      t.strictEqual(pool.nodesToHost(nodes, 'http:')[0].url.host, '127.0.0.1:9200')
+      t.strictEqual(pool.nodesToHost(nodes, 'http:')[1].url.host, '127.0.0.1:9201')
+      t.end()
+    })
+
+    t.test('publish_address as host/ip', t => {
+      const pool = new ConnectionPool({ Connection })
+      const nodes = {
+        a1: {
+          http: {
+            publish_address: 'example.com/127.0.0.1:9200'
+          },
+          roles: ['master', 'data', 'ingest']
+        },
+        a2: {
+          http: {
+            publish_address: 'example.com/127.0.0.1:9201'
+          },
+          roles: ['master', 'data', 'ingest']
+        }
       }
-    }, {
-      url: new URL('http://127.0.0.1:9201'),
-      id: 'a2',
-      roles: {
-        master: true,
-        data: true,
-        ingest: true,
-        ml: false
+
+      t.deepEqual(pool.nodesToHost(nodes, 'http:'), [{
+        url: new URL('http://example.com:9200'),
+        id: 'a1',
+        roles: {
+          master: true,
+          data: true,
+          ingest: true,
+          ml: false
+        }
+      }, {
+        url: new URL('http://example.com:9201'),
+        id: 'a2',
+        roles: {
+          master: true,
+          data: true,
+          ingest: true,
+          ml: false
+        }
+      }])
+
+      t.strictEqual(pool.nodesToHost(nodes, 'http:')[0].url.host, 'example.com:9200')
+      t.strictEqual(pool.nodesToHost(nodes, 'http:')[1].url.host, 'example.com:9201')
+      t.end()
+    })
+
+    t.test('Should use the configure protocol', t => {
+      const pool = new ConnectionPool({ Connection })
+      const nodes = {
+        a1: {
+          http: {
+            publish_address: 'example.com/127.0.0.1:9200'
+          },
+          roles: ['master', 'data', 'ingest']
+        },
+        a2: {
+          http: {
+            publish_address: 'example.com/127.0.0.1:9201'
+          },
+          roles: ['master', 'data', 'ingest']
+        }
       }
-    }])
+
+      t.strictEqual(pool.nodesToHost(nodes, 'https:')[0].url.protocol, 'https:')
+      t.strictEqual(pool.nodesToHost(nodes, 'http:')[1].url.protocol, 'http:')
+      t.end()
+    })
+
     t.end()
   })
 

test/utils/buildCluster.js

@@ -53,12 +53,14 @@ function buildCluster (options, callback) {
 
     buildServer(options.handler || handler, ({ port }, server) => {
       nodes[opts.id] = {
-        url: `http://localhost:${port}`,
+        url: `http://127.0.0.1:${port}`,
         server
       }
       sniffResult.nodes[opts.id] = {
         http: {
-          publish_address: `http://localhost:${port}`
+          publish_address: options.hostPublishAddress
+            ? `localhost/127.0.0.1:${port}`
+            : `127.0.0.1:${port}`
         },
         roles: ['master', 'data', 'ingest']
       }