elasticsearch-head can't connection to elasticsearch with http://localhost:9200 - elasticsearch

Question

elasticsearch version : elasticsearch-5.2.0
elasticsearch-head version : latest version
Start service successfully：
#### node1 ####
deMacBook-Pro:bin yyq$ ./elasticsearch
[2017-02-15T13:08:57,174][INFO ][o.e.n.Node ] [yml-es-node-1] initializing ...
[2017-02-15T13:08:57,303][INFO ][o.e.e.NodeEnvironment ] [yml-es-node-1] using [1] data paths, mounts [[/ (/dev/disk1)]], net usable_space [21.4gb], net total_space [232.6gb], spins? [unknown], types [hfs]
[2017-02-15T13:08:57,304][INFO ][o.e.e.NodeEnvironment ] [yml-es-node-1] heap size [1.9gb], compressed ordinary object pointers [true]
[2017-02-15T13:08:57,355][INFO ][o.e.n.Node ] [yml-es-node-1] node name [yml-es-node-1], node ID [hqVAcDOdRu-LXuAgUEX9oQ]
[2017-02-15T13:08:57,358][INFO ][o.e.n.Node ] [yml-es-node-1] version[5.2.0], pid[93922], build[24e05b9/2017-01-24T19:52:35.800Z], OS[Mac OS X/10.11.6/x86_64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_25/25.25-b02]
[2017-02-15T13:08:58,802][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [aggs-matrix-stats]
[2017-02-15T13:08:58,803][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [ingest-common]
[2017-02-15T13:08:58,803][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [lang-expression]
[2017-02-15T13:08:58,803][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [lang-groovy]
[2017-02-15T13:08:58,803][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [lang-mustache]
[2017-02-15T13:08:58,803][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [lang-painless]
[2017-02-15T13:08:58,803][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [percolator]
[2017-02-15T13:08:58,804][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [reindex]
[2017-02-15T13:08:58,804][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [transport-netty3]
[2017-02-15T13:08:58,804][INFO ][o.e.p.PluginsService ] [yml-es-node-1] loaded module [transport-netty4]
[2017-02-15T13:08:58,805][INFO ][o.e.p.PluginsService ] [yml-es-node-1] no plugins loaded
[2017-02-15T13:09:02,610][INFO ][o.e.n.Node ] [yml-es-node-1] initialized
[2017-02-15T13:09:02,610][INFO ][o.e.n.Node ] [yml-es-node-1] starting ...
[2017-02-15T13:09:02,953][INFO ][o.e.t.TransportService ] [yml-es-node-1] publish_address {127.0.0.1:9300}, bound_addresses {[fe80::1]:9300}, {[::1]:9300}, {127.0.0.1:9300}
[2017-02-15T13:09:06,125][INFO ][o.e.c.s.ClusterService ] [yml-es-node-1] detected_master {yml-es-node-2}{FWhiCkI7TV6hJOlmT_fgQg}{URIaxsK2T0aP7jRRe6TDfg}{127.0.0.1}{127.0.0.1:9301}, added {{yml-es-node-2}{FWhiCkI7TV6hJOlmT_fgQg}{URIaxsK2T0aP7jRRe6TDfg}{127.0.0.1}{127.0.0.1:9301},}, reason: zen-disco-receive(from master [master {yml-es-node-2}{FWhiCkI7TV6hJOlmT_fgQg}{URIaxsK2T0aP7jRRe6TDfg}{127.0.0.1}{127.0.0.1:9301} committed version [385]])
[2017-02-15T13:09:06,175][INFO ][o.e.h.HttpServer ] [yml-es-node-1] publish_address {127.0.0.1:9200}, bound_addresses {[fe80::1]:9200}, {[::1]:9200}, {127.0.0.1:9200}
[2017-02-15T13:09:06,175][INFO ][o.e.n.Node ] [yml-es-node-1] started
#### node2 ####
deMacBook-Pro:bin yyq$ ./elasticsearch
[2017-02-15T10:31:03,936][INFO ][o.e.n.Node ] [yml-es-node-2] initializing ...
[2017-02-15T10:31:04,087][INFO ][o.e.e.NodeEnvironment ] [yml-es-node-2] using [1] data paths, mounts [[/ (/dev/disk1)]], net usable_space [19.3gb], net total_space [232.6gb], spins? [unknown], types [hfs]
[2017-02-15T10:31:04,087][INFO ][o.e.e.NodeEnvironment ] [yml-es-node-2] heap size [1.9gb], compressed ordinary object pointers [true]
[2017-02-15T10:31:04,104][INFO ][o.e.n.Node ] [yml-es-node-2] node name [yml-es-node-2], node ID [FWhiCkI7TV6hJOlmT_fgQg]
[2017-02-15T10:31:04,112][INFO ][o.e.n.Node ] [yml-es-node-2] version[5.2.0], pid[85158], build[24e05b9/2017-01-24T19:52:35.800Z], OS[Mac OS X/10.11.6/x86_64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_25/25.25-b02]
[2017-02-15T10:31:05,830][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [aggs-matrix-stats]
[2017-02-15T10:31:05,830][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [ingest-common]
[2017-02-15T10:31:05,830][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [lang-expression]
[2017-02-15T10:31:05,830][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [lang-groovy]
[2017-02-15T10:31:05,830][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [lang-mustache]
[2017-02-15T10:31:05,830][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [lang-painless]
[2017-02-15T10:31:05,831][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [percolator]
[2017-02-15T10:31:05,831][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [reindex]
[2017-02-15T10:31:05,831][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [transport-netty3]
[2017-02-15T10:31:05,831][INFO ][o.e.p.PluginsService ] [yml-es-node-2] loaded module [transport-netty4]
[2017-02-15T10:31:05,832][INFO ][o.e.p.PluginsService ] [yml-es-node-2] no plugins loaded
[2017-02-15T10:31:09,871][INFO ][o.e.n.Node ] [yml-es-node-2] initialized
[2017-02-15T10:31:09,871][INFO ][o.e.n.Node ] [yml-es-node-2] starting ...
[2017-02-15T10:31:10,171][INFO ][o.e.t.TransportService ] [yml-es-node-2] publish_address {127.0.0.1:9301}, bound_addresses {[fe80::1]:9301}, {[::1]:9301}, {127.0.0.1:9301}
[2017-02-15T10:31:13,327][INFO ][o.e.c.s.ClusterService ] [yml-es-node-2] detected_master {yml-es-node-1}{hqVAcDOdRu-LXuAgUEX9oQ}{VrY6MUvhQNetUmbzcRnKMg}{127.0.0.1}{127.0.0.1:9300}, added {{yml-es-node-1}{hqVAcDOdRu-LXuAgUEX9oQ}{VrY6MUvhQNetUmbzcRnKMg}{127.0.0.1}{127.0.0.1:9300},}, reason: zen-disco-receive(from master [master {yml-es-node-1}{hqVAcDOdRu-LXuAgUEX9oQ}{VrY6MUvhQNetUmbzcRnKMg}{127.0.0.1}{127.0.0.1:9300} committed version [223]])
[2017-02-15T10:31:13,388][INFO ][o.e.h.HttpServer ] [yml-es-node-2] publish_address {127.0.0.1:9201}, bound_addresses {[fe80::1]:9201}, {[::1]:9201}, {127.0.0.1:9201}
[2017-02-15T10:31:13,388][INFO ][o.e.n.Node ] [yml-es-node-2] started
deMacBook-Pro:elasticsearch-head-master yyq$ grunt server
Running "connect:server" (connect) task
Waiting forever...
Started connect web server on http://localhost:9100
When I opened the url：http://localhost:9100 and clicked [connect] button, but I'm unable to connect to elasticsearch.
Could anyone help me?
This is the screenshot

Answer 1

In your elasticsearch.yml configuration, you probably have the following setting:
http.port: 9201
This is also visible in your logs:
[...] publish_address {127.0.0.1:9201}, bound_addresses {[fe80::1]:9201}, {[::1]:9201}, {127.0.0.1:9201}
^
|
your HTTP port
So in your elasticsearch-head interface, you need to connect to localhost:9201 not localhost:9200.
UPDATE
You also need to add http.cors.enabled: true in your elasticsearch.yml configuration and restart your ES server

Answer 2

As mentioned in the previous post, to be able to run the head plugin to check the health status of the ElastiSearch cluster, you need to enable the CORS's environmental variables. One way is to mount the config file for ES as described here. Alternatively, you can define the environmental variables directly in your docker-compose as documented in this GitHub issue. I am adding the code below for completeness, which worked for me:
version: '3'
services:
# search engine
elasticsearch:
image: docker.elastic.co/elasticsearch/elasticsearch-oss:7.0.1
container_name: elasticsearch
environment:
- discovery.type=single-node
- http.port=9200
- http.cors.enabled=true
- http.cors.allow-origin=http://localhost:1358,http://127.0.0.1:1358
- http.cors.allow-headers=X-Requested-With,X-Auth-Token,Content-Type,Content-Length,Authorization
- http.cors.allow-credentials=true
- bootstrap.memory_lock=true
- 'ES_JAVA_OPTS=-Xms512m -Xmx512m'
ports:
- '9200:9200'
- '9300:9300'
# elasticsearch browser
dejavu:
image: appbaseio/dejavu:3.2.3
container_name: dejavu
ports:
- '1358:1358'
links:
- elasticsearch
Note that using - http.cors.allow-origin=* works and it could be handy for certain development setups.