CentOS erlang安裝、emqtt_benchmark配置

阿新 • • 發佈：2019-02-04

由於想對EMQTT進行壓力測試，所有使用了官方推薦的emqtt_benchmark測試，但一解壓就出現了問題。

[[email protected] bak]# cd emqtt_benchmark/
[[email protected] emqtt_benchmark]# ls
CHANGELOG.md  emqtt_bench_pub  emqtt_bench_sub  LICENSE  Makefile  README.md  rebar  rebar.config  src
[[email protected] emqtt_benchmark-master]# make 

/usr/bin/env: escript: No such file or directory
make: *** [get-deps] Error 127

網上檢視escrpt是erlang的一種高階特性，所以需要先安裝Erlang，先安裝的是otp_src_R14B04,但執行emqtt_benchmark時一起報錯，後更新為otp_src_18配置成功。

安裝erlang

如果未安裝以後程式，請先安裝依賴

$sudo yum install gcc gcc-c++ glibc-devel make ncurses-devel openssl-devel autoconf java-1.8 
.0-openjdk-devel git

wget http://erlang.org/download/otp_src_18.3.tar.gz
tar zxvf otp_src_18.tar.gz#（解壓） 
cd otp_src_18.3/ #（進入到解壓好的資料夾中）

編譯安裝

./configure  --prefix=/home/erlang（指定安裝目錄）
make（編譯） 
make install（安裝）

配置環境變數

更新環境變數

vim /etc/profile

在最後一行加上

export PATH=/home/erlang/bin:$PATH

儲存退出後

source /etc/profile

或者

新增系統環境變數

export PATH=$PATH:/home/erlang/bin

檢視環境變數:

echo $PATH

驗證erlang

命令列中輸入erl看是否安裝成功！

[root@iZuf6ixy03u72vzno4jsiuZ bak]# erl
Erlang/OTP 18 [erts-7.3] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V7.3  (abort with ^G)
1>

驗證emqtt_benchmark


[[email protected] emqtt_benchmark-master]# make
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/emqttc to be an app dir (containing ebin/*.app), but no .app found.
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/getopt to be an app dir (containing ebin/*.app), but no .app found.
==> emqtt_benchmark-master (get-deps)
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/emqttc to be an app dir (containing ebin/*.app), but no .app found.
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/getopt to be an app dir (containing ebin/*.app), but no .app found.
Pulling emqttc from {git,"git://github.com/emqtt/emqttc.git",
                         {branch,"master"}}
Cloning into 'emqttc'...
Pulling getopt from {git,"https://github.com/jcomellas/getopt.git",
                         {branch,"master"}}
Cloning into 'getopt'...
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/gen_logger to be an app dir (containing ebin/*.app), but no .app found.
==> emqttc (get-deps)
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/gen_logger to be an app dir (containing ebin/*.app), but no .app found.
Pulling gen_logger from {git,"https://github.com/emqtt/gen_logger.git",
                             {branch,"master"}}
Cloning into 'gen_logger'...
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/lager to be an app dir (containing ebin/*.app), but no .app found.
==> gen_logger (get-deps)
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/lager to be an app dir (containing ebin/*.app), but no .app found.
Pulling lager from {git,"https://github.com/basho/lager.git",
                        {branch,"master"}}
Cloning into 'lager'...
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/goldrush to be an app dir (containing ebin/*.app), but no .app found.
==> lager (get-deps)
WARN:  Expected /chroot/www/bak/emqtt_benchmark-master/deps/goldrush to be an app dir (containing ebin/*.app), but no .app found.
Pulling goldrush from {git,"https://github.com/basho/goldrush.git",
                           {tag,"0.1.9"}}
Cloning into 'goldrush'...
==> goldrush (get-deps)
==> getopt (get-deps)
==> goldrush (compile)
Compiled src/gr_param.erl
Compiled src/gr_counter_sup.erl
Compiled src/glc_ops.erl
Compiled src/gr_app.erl
Compiled src/gr_param_sup.erl
Compiled src/glc_run.erl
Compiled src/gre.erl
Compiled src/gr_sup.erl
Compiled src/gr_manager.erl
Compiled src/gr_context.erl
Compiled src/gr_manager_sup.erl
Compiled src/gr_counter.erl
Compiled src/glc_lib.erl
Compiled src/glc.erl
Compiled src/glc_code.erl
==> lager (compile)
Compiled src/lager_util.erl
Compiled src/lager_transform.erl
Compiled src/lager_backend_throttle.erl
Compiled src/lager_handler_watcher_sup.erl
Compiled src/lager_crash_log.erl
Compiled src/lager_format.erl
Compiled src/lager_sup.erl
Compiled src/lager_file_backend.erl
Compiled src/lager_manager_killer.erl
Compiled src/error_logger_lager_h.erl
Compiled src/lager_msg.erl
Compiled src/lager_default_formatter.erl
Compiled src/lager_common_test_backend.erl
Compiled src/lager_console_backend.erl
Compiled src/lager_trunc_io.erl
Compiled src/lager_handler_watcher.erl
Compiled src/lager_config.erl
Compiled src/lager_app.erl
Compiled src/lager.erl
Compiled src/lager_stdlib.erl
==> gen_logger (compile)
Compiled src/gen_logger.erl
Compiled src/error_logger_logger.erl
Compiled src/console_logger.erl
Compiled src/lager_logger.erl
==> emqttc (compile)
Compiled src/emqttc_reconnector.erl
Compiled src/emqttc_message.erl
Compiled src/emqttc_serialiser.erl
Compiled src/emqttc_socket.erl
Compiled src/emqttc_parser.erl
Compiled src/emqttc_opts.erl
Compiled src/emqttc_protocol.erl
Compiled src/emqttc_keepalive.erl
Compiled src/emqttc_packet.erl
Compiled src/emqttc_topic.erl
/chroot/www/bak/emqtt_benchmark-master/deps/emqttc/src/emqttc.erl:658: Warning: variable 'Logger' is unused
/chroot/www/bak/emqtt_benchmark-master/deps/emqttc/src/emqttc.erl:658: Warning: variable 'Name' is unused
Compiled src/emqttc.erl
==> getopt (compile)
Compiled src/getopt.erl
==> emqtt_benchmark-master (compile)
Compiled src/emqtt_benchmark.erl
==> emqtt_benchmark-master (xref)

[[email protected] emqtt_benchmark-master]# ./emqtt_bench_sub --help
Usage: emqtt_bench_sub [--help <help>] [-h [<host>]] [-p [<port>]]
                       [-c [<count>]] [-n [<startnumber>]]
                       [-i [<interval>]] [-t <topic>] [-q [<qos>]]
                       [-u <username>] [-P <password>] [-k [<keepalive>]]
                       [-C [<clean>]] [-S [<ssl>]]
                       [--certfile <certfile>] [--keyfile <keyfile>]
                       [--ifaddr <ifaddr>]

  --help             help information
  -h, --host         mqtt server hostname or IP address [default: 
                     localhost]
  -p, --port         mqtt server port number [default: 1883]
  -c, --count        max count of clients [default: 200]
  -n, --startnumber  start number [default: 0]
  -i, --interval     interval of connecting to the broker [default: 10]
  -t, --topic        topic subscribe, support %u, %c, %i variables
  -q, --qos          subscribe qos [default: 0]
  -u, --username     username for connecting to server
  -P, --password     password for connecting to server
  -k, --keepalive    keep alive in seconds [default: 300]
  -C, --clean        clean session [default: true]
  -S, --ssl          ssl socoket for connecting to server [default: false]
  --certfile         client certificate for authentication, if required by 
                     server
  --keyfile          client private key for authentication, if required by 
                     server
  --ifaddr           local ipaddress or interface address

什麼是Erlang

Erlang([‘ə:læŋ])是一種通用的面向併發的程式語言，它由瑞典電信裝置製造商愛立信所轄的CS-Lab開發，目的是創造一種可以應對大規模併發活動的程式語言和執行環境。Erlang問世於1987年，經過十年的發展，於1998年釋出開源版本。Erlang是運行於虛擬機器的解釋性語言，但是現在也包含有烏普薩拉大學高效能Erlang計劃（HiPE）開發的原生代碼編譯器，自R11B-4版本開始，Erlang也開始支援指令碼式直譯器。在程式設計範型上，Erlang屬於多重範型程式語言，涵蓋函式式、併發式及分散式。順序執行的Erlang是一個及早求值, 單次賦值和動態型別的函數語言程式設計語言。
Erlang是一個結構化，動態型別程式語言，內建平行計算支援。最初是由愛立信專門為通訊應用設計的，比如控制交換機或者變換協議等，因此非常適合於構建分散式，實時軟平行計算系統。使用Erlang編寫出的應用執行時通常由成千上萬個輕量級程序組成，並通過訊息傳遞相互通訊。程序間上下文切換對於Erlang來說僅僅只是一兩個環節，比起C程式的執行緒切換要高效得多得多了。
使用Erlang來編寫分散式應用要簡單的多，因為它的分散式機制是透明的：對於程式來說並不知道自己是在分散式執行。Erlang執行時環境是一個虛擬機器，有點像Java虛擬機器，這樣程式碼一經編譯，同樣可以隨處執行。它的執行時系統甚至允許程式碼在不被中斷的情況下更新。另外如果需要更高效的話，位元組程式碼也可以編譯成原生代碼執行。

CentOS erlang安裝、emqtt_benchmark配置

安裝erlang

配置環境變數

驗證erlang

驗證emqtt_benchmark

什麼是Erlang

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