为什么80%的码农都做不了架构师？>>> 
现象
➜ ~ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3b45b6a8d0fc elasticsearch:latest "/bin/bash" 2 hours ago Up About an hour 0.0.0.0:9200->9200/tcp, 0.0.0.0:9300->9300/tcp ela-slave端口是已经映射的
➜ ~ curl 127.0.0.1:9200
curl: (52) Empty reply from server但是无法访问
原因：
docker里面的host不能配置127.0.0.1 或者192.168.0.1 或则宿主机器将无法访问端口
解决方案
修改 /usr/local/elasticsearch-2.4.1/config 参数
# network.host: 192.168.0.1
network.host: 0.0.0.0
将其改成0.0.0.0
启动后的效果如下
u should upgrade
[2016-10-18 06:48:05,655][INFO ][node ] [Wilson Fisk] version[2.4.1], pid[386], build[c67dc32/2016-09-27T18:57:55Z]
[2016-10-18 06:48:05,657][INFO ][node ] [Wilson Fisk] initializing ...
[2016-10-18 06:48:06,657][INFO ][plugins ] [Wilson Fisk] modules [reindex, lang-expression, lang-groovy], plugins [], sites []
[2016-10-18 06:48:06,707][INFO ][env ] [Wilson Fisk] using [1] data paths, mounts [[/ (none)]], net usable_space [54.9gb], net total_space [59gb], spins? [possibly], types [aufs]
[2016-10-18 06:48:06,709][INFO ][env ] [Wilson Fisk] heap size [1007.3mb], compressed ordinary object pointers [true]
[2016-10-18 06:48:09,754][INFO ][node ] [Wilson Fisk] initialized
[2016-10-18 06:48:09,755][INFO ][node ] [Wilson Fisk] starting ...
[2016-10-18 06:48:10,014][INFO ][transport ] [Wilson Fisk] publish_address {172.17.0.3:9300}, bound_addresses {[::]:9300}
[2016-10-18 06:48:10,030][INFO ][discovery ] [Wilson Fisk] elasticsearch/cbkE0IpITIGpLDXEQduQ1Q
[2016-10-18 06:48:13,193][INFO ][cluster.service ] [Wilson Fisk] new_master {Wilson Fisk}{cbkE0IpITIGpLDXEQduQ1Q}{172.17.0.3}{172.17.0.3:9300}, reason: zen-disco-join(elected_as_master, [0] joins received)
[2016-10-18 06:48:13,276][INFO ][http ] [Wilson Fisk] publish_address {172.17.0.3:9200}, bound_addresses {[::]:9200}
[2016-10-18 06:48:13,277][INFO ][node ] [Wilson Fisk] started
[2016-10-18 06:48:13,342][INFO ][gateway ] [Wilson Fisk] recovered [0] indices into cluster_state
可以再宿主机器正常访问
➜ ~ curl 127.0.0.1:9200
{
"name" : "Wilson Fisk",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "xTeny0KFRHWNkzbqEIzNSg",
"version" : {
"number" : "2.4.1",
"build_hash" : "c67dc32e24162035d18d6fe1e952c4cbcbe79d16",
"build_timestamp" : "2016-09-27T18:57:55Z",
"build_snapshot" : false,
"lucene_version" : "5.5.2"
},
"tagline" : "You Know, for Search"
}
同理，我在docker里面配置了redis ，里面默认也是127.0.0.1 ，结果宿主机器无法访问docker端口
。这里根据上面的情况也将redis 配置成0.0.0.0
#
# Examples:
#
# bind 192.168.1.100 10.0.0.1
#bind 127.0.0.1
bind 0.0.0.0
# Specify the path for the Unix socket that will be used to listen for
# incoming connections. There is no default, so Redis will not listen
# on a unix socket when not specified.
#
后来重启redis ，宿主机器也可以访问了