es_client

An OTP application

wget https://s3.amazonaws.com/rebar3/rebar3 && chmod +x rebar3

Build

---

$ rebar3 compile

Build and Run (In Erlang/OTP 20)

Erlang/OTP 20 [erts-9.0] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]

编译启动

% 编译
./rebar3 clean && ./rebar3 compile

% 启动
erl -boot start_sasl -pa _build/default/lib/*/ebin -config config/sys.config

./rebar3 clean && ./rebar3 compile && erl  -boot start_sasl +A 2 +S 2 \
    -pa _build/default/lib/*/ebin -config config/sys.config \
    -sname es_client -mnesia dir '"mnesia.db"'

./rebar3 clean && ./rebar3 compile && erl \
    -pa _build/default/lib/*/ebin -config config/sys.config \
    -sname es_client2 -mnesia dir '"mnesia.db2"'

需要添加 scan_files 配置项检查的功能，便于检查用户是否真的配置好了;
需要添加 reload 配置的功能；

observer:start().
application:start(es_client).


esc_db:save_logfile(b94615e871c908619231418a0d27e4df, 3).
esc_db:get_last_position('4e6b4fb3b23db71c4a51124d9de155a1').

rd(esc_logfile ,{ name_md5, last_position}).
Data = #esc_logfile{
    name_md5='90a1b746a382dc494c3a960b5d3bdba5',
    last_position=3
},
mnesia:dirty_write(Data).
mnesia:dirty_read({esc_logfile, '90a1b746a382dc494c3a960b5d3bdba5'}).

filelib:file_size("/Users/leeyi/workspace/tools/wwwlogs/admin.dev.afd56.com.cn.access.log").

InitArgs={"2a68be7fed46cc80ed9794c77a0041fa",0,
 "/Users/leeyi/workspace/tools/wwwlogs/admin.dev.afd56.com.cn.access.log",[],
 false,"unset_keys","filebeat-esc-test-nginx-access-{Ymd}"},
gen_server:cast(whereis('2a68be7fed46cc80ed9794c77a0041fa'), InitArgs).


InitArgs={"07cac3d69147445787f7493af965bdd9",0,
 "/Users/leeyi/workspace/tools/nginx/logs/task_log.log"},
gen_server:cast(whereis('07cac3d69147445787f7493af965bdd9'), []).


sys:get_status('07cac3d69147445787f7493af965bdd9').
sys:get_state('d200bf5f811538c314a866b6308e0b3d').

process_info(whereid('07cac3d69147445787f7493af965bdd9'),status).

observer:stop(), observer:start().

erlang:is_process_alive(<0.100.0>).

whereis('07cac3d69147445787f7493af965bdd9').


application:start(mnesia).
rr("/Users/leeyi/workspace/erl/es_client/apps/es_client/include/es_client.hrl").
%% 查询 使用 qlc

mnesia:transaction(fun() ->
    Q = qlc:q([E || E <- mnesia:table(esc_logfile)]),
    qlc:e(Q)
end).

whereis(application_controller)

application:get_env(es_client, scan_flies).

{ok, [I1, I2]}=application:get_env(es_client, scan_flies).

 F1 = maps:get(file,I1).
 F2 = maps:get(file,I2).
 filelib:is_regular(F1).

Dir = filename:dirname(F1).
BaseName = filename:basename(F1).
filelib:fold_files(Dir, "."++BaseName, true, fun(F, AccIn) -> [F | AccIn] end, []).

引入 mnesia

• 先 application:stop(mnesia)
• mnesia检查数据库是否创建
• 确保先创建 schema 之后再启动 mnesia
• 确保已经 mnesia:start().

esc_db:get_last_position("07cac3d69147445787f7493af965bdd9").


observer:stop(), observer:start().

application:start(es_client).

应用

% 创建索引
erlastic_search:create_index(<<"lee_index">>).

% 删除
erlastic_search:delete_index(<<"lee_index">>).
% 批量删除
erlastic_search:delete_index(<<"es_index_name*">>).
erlastic_search:delete_index(<<"*index_name*">>).


% 添加记录（自动生成 _id）
erlastic_search:index_doc(<<"lee_index">>, <<"type">>, [{<<"key1">>, <<"value1">>}]).

% 添加记录（自定义 _id）
erlastic_search:index_doc_with_id(<<"lee_index">>, <<"type">>, <<"id1">>, [{<<"key1">>, <<"value1">>}]).

% 查询
erlastic_search:search(<<"lee_index">>, <<"type">>, <<"key1:value1">>).


f().
File = "/Users/leeyi/workspace/tools/nginx/logs/8082backend-local-access.log",

{ok, S} = file:open(File, [read]),

Str = io:get_line(S, ''),

Sig = erlang:md5(Str),

RowId = iolist_to_binary([io_lib:format("~2.16.0b", [S]) || S <- binary_to_list(Sig)])

erlastic_search:index_doc_with_id(<<"lee_index">>, <<"doc">>, RowId, jsx:decode(list_to_binary(Str))).



f().
File = "/Users/leeyi/workspace/tools/nginx/logs/elk_access.log",

{ok, S} = file:open(File, [read]),

Str = io:get_line(S, ''),

Sig = erlang:md5(Str),

RowId = iolist_to_binary([io_lib:format("~2.16.0b", [S]) || S <- binary_to_list(Sig)])

erlastic_search:index_doc_with_id(<<"lee_index">>, <<"doc">>, RowId, jsx:decode(list_to_binary(Str))).


File = "/Users/leeyi/workspace/tools/nginx/logs/elk_access.log",
Msg = [File, false, "|"],
gen_server:cast({local, "fi"}, Msg).

File = "/Users/leeyi/workspace/tools/nginx/logs/elk_access.log",
{ok,Fd}=file:open(File,read),
file:position(Fd, {bof, 158}),
file:read_line(Fd).
file:read_line(Fd).


Position = file:position(Fd, {cur, 0}).

file_scaner:stop('90a1b746a382dc494c3a960b5d3bdba5').
observer:stop(), observer:start().

application:start(es_client).


f(),
File = "/Users/leeyi/workspace/tools/nginx/logs/8085admin-local-error_test.log",
{ok,Fd} = file:open(File,read),
file:pread(Fd, 133, 800).

f(),
File = "/Users/leeyi/workspace/tools/nginx/logs/8085admin-local-error_test.log",
filelib:file_size(File).

application:start(es_client).

observer:start().

observer:stop(), observer:start().

calendar:now_to_universal_time(os:timestamp()).

调试

observer:start().
application:start(es_client).

application:start(observer).

统计模块函数被调用次数

cprof:start(). % 启动性能分析器
application:start(es_client). % 启动应用程序
cprof:pause(). % 暂停性能分析器

cprof:analyse(es_client_app). % 分析函数调用
cprof:analyse(file_scaner).
cprof:analyse(erlastic_search). % 分析函数调用

cprof:analyse(). %分析所有统计到的模块

cprof:stop(). % 停止性能分析器

测试代码覆盖 (重新启动erl运行)

cover:start(). % 启动覆盖分析器
% 编译  es_client_app 进行覆盖分析

cover:compile('apps/es_client/src/es_client_app').
cover:compile('apps/es_client/src/es_client_sup').
cover:compile('apps/es_client/src/file_scaner').
cover:compile('apps/es_client/src/func').
cover:compile('apps/es_client/src/esc_db').

application:start(es_client). % 运行程序

cover:analyse_to_file(es_client_app). % 分析结果
cover:analyse_to_file(file_scaner).
cover:analyse_to_file(esc_db).
cover:analyse_to_file(func).

% 会输出 es_client_app.COVER.out 文件 ，用编辑器打开就可以看了
% 文件“左侧数字”表示代码行被执行的次数，用0标注的表示没有被执行过

测试

./rebar3 eunit

发布

发布之前要设置 src/es_client.app.src :

{applications, [kernel,stdlib,jsx,erlastic_search,mnesia,iso8601]},

发布命令

rebar3 as product release

rebar3 as prod tar

rebar3 as centos-7 tar

scp _build/centos-7/rel/es_client/es_client-0.1.0.tar.gz root@192.168.2.207:/usr/local/es_client/

mkdir -p /usr/local/es_client

mv es_client-0.1.0.tar.gz /usr/local/es_client/

cd /usr/local/es_client

tar -xzf es_client-0.1.0.tar.gz

bin/es_client console

bin/es_client start

http://192.168.2.212:9100/_cat/indices?v

{include_erts, false} ，开发时使用这个配置，在执行 rebar3 release 时，只是创建一个ERTS的软链接，省下了拷贝文件的时间。在生产环境下，你可以创建一个product的profile，里面定义 {include_erts, true} ，这样执行 rebar3 as product release 时，ERTS会被拷贝到发布文件夹中，在服务器上部署不需要安装Erlang。

详细发布流程请参考 https://my.oschina.net/leeyisoft/blog/1504354

远程监控

首先把需要监控的环境的 config/vm.args 配置做如下修改：

-name es_client@192.168.2.207

192.168.2.207 为目标环境的IP；

修改完成、重启节点后，在本地运行：

erl -name debug@192.168.2.128 -setcookie es_client_cookie -remsh es_client@192.168.2.207

就进入了目标环境，直接 ctrl+c 再输入a 退出；货主 q(). 退出