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API网关-apisix初始化环境

作者:互联网

  初始化环境命令make init

  ### init: Initialize the runtime environment

  .PHONY: init

  init: default

  ./bin/apisix init

  ./bin/apisix init_etcd

  可以发现,初始化环境,实际上执行了两个lua命令init和init_etcd

  bin目录下的apisix实际上就是一个lua脚本,脚本中定义了一些cmd命令。

  #!/usr/bin/env lua

  ....

  ....

  _M[cmd_action](arg[2])apisix init

  init命令位于apisix脚本的init函数中:

  大致要做的工作,加载yaml配置文件,解析配置、通过配置文件生成nginx配置文件,检查openresty版本。

  local function init()

  -- read_yaml_conf 读取yaml配置文件

  local yaml_conf, err=read_yaml_conf()

  if not yaml_conf then

  error("failed to read local yaml config of apisix: " .. err)

  end

  -- print("etcd: ", yaml_conf.etcd)

  -- 查看openresty版本

  local or_ver=excute_cmd("openresty -V 2>&1")

  local with_module_status=true

  if or_ver and not or_ver:find("http_stub_status_module", 1, true) then

  io.stderr:write("'http_stub_status_module' module is missing in ",

  "your openresty, please check it out. Without this ",

  "module, there will be fewer monitoring indicators.

  ")

  with_module_status=false

  end

  -- Using templateder

  local sys_conf={

  lua_path=pkg_path_org,

  lua_cpath=pkg_cpath_org,

  os_name=exec("uname"),

  apisix_lua_home=apisix_home,

  with_module_status=with_module_status,

  node_ssl_listen=9443, -- default value

  error_log={level="warn"},

  }

  -- 校验配置

  if not yaml_conf.apisix then

  error("failed to read `apisix` field from yaml file")

  end

  -- 校验配置

  if not yaml_conf.nginx_config then

  error("failed to read `nginx_config` field from yaml file")

  end

  -- 解析配置

  for k,v in pairs(yaml_conf.apisix) do

  sys_conf[k]=v

  end

  for k,v in pairs(yaml_conf.nginx_config) do

  sys_conf[k]=v

  end

  if(sys_conf["enable_dev_mode"]==true) then

  sys_conf["worker_processes"]=1

  else

  sys_conf["worker_processes"]="auto"

  end

  --通过配置文件渲染生成nginx配置

  local conf_render=templatepile(ngx_tpl)

  local ngxconf=conf_render(sys_conf)

  local ok, err=write_file(apisix_home .. "/conf/nginx.conf", ngxconf)

  if not ok then

  error("failed to update nginx.conf: " .. err)

  end

  -- 检查openresty版本

  local op_ver=get_openresty_version()

  if op_ver==nil then

  io.stderr:write("can not find openresty

  ")

  return

  end

  local need_ver="1.15.8"

  if not check_or_version(op_ver, need_ver) then

  io.stderr:write("openresty version must >=", need_ver, " current ", op_ver, "

  ")

  return

  end

  endapisix init_etcd

  大致工作如下,读取yaml配置,check数据源,生成etcd配置,执行etcd接口初始化apisix数据。

  local function init_etcd(show_output)

  -- read_yaml_conf 读取yaml配置文件

  local yaml_conf, err=read_yaml_conf()

  if not yaml_conf then

  error("failed to read local yaml config of apisix: " .. err)

  end

  if not yaml_conf.apisix then

  error("failed to read `apisix` field from yaml file when init etcd")

  end

  -- check 是否用的etcd数据源

  if yaml_conf.apisix.config_center ~="etcd" then

  return true

  end

  if not yaml_conf.etcd then

  error("failed to read `etcd` field from yaml file when init etcd")

  end

  -- 生成etcd配置

  local etcd_conf=yaml_conf.etcd

  local uri=etcd_conf .. "/v2/keys" .. (etcd_conf.prefix or "")

  local timeout=etcd_conf.timeout or 3

  -- 执行相关命令,初始化数据

  for _, dir_name in ipairs({"/routes", "/upstreams", "/services",

  "/plugins", "/consumers", "/node_status",

  "/ssl", "/global_rules", "/stream_routes",

  "/proto"}) do

  local cmd="curl " .. uri .. dir_name

  .. "?prev_exist=false -X PUT -d dir=true "

  .. "--connect-timeout " .. timeout

  .. " --max-time " .. timeout * 2 .. " --retry 1 2>&1"

  local res=exec(cmd)

  if not res:find("index", 1, true)

  and not res:find("createdIndex", 1, true) then

  error(cmd .. "

  " .. res)

  end

  if show_output then

  print(cmd)

  print(res)

  end

  end

  end

标签:网关,end,conf,yaml,API,etcd,local,apisix
来源: https://www.cnblogs.com/linjingyg/p/15802616.html