flea1lt opened a new issue, #11340:
URL: https://github.com/apache/apisix/issues/11340
### Description
Comment in `config.yaml` shows that APISIX support use environment variables
in yaml
```
# To configure via environment variables, you can use `${{VAR}}` syntax. For
instance:
#
# deployment:
# role: traditional
# role_traditional:
# config_provider: etcd
# etcd:
# host:
# - http://${{ETCD_HOST}}:2379
```
But in `config-defautl.yaml`, it does not work.
```
-- apisix/cli/file.lua
local default_conf = yaml.load(default_conf_yaml)
if not default_conf then
return nil, "invalid config-default.yaml file"
end
local_conf_path = profile:customized_yaml_path()
if not local_conf_path then
local_conf_path = profile:yaml_path("config")
end
local user_conf_yaml, err = util.read_file(local_conf_path)
if not user_conf_yaml then
return nil, err
end
local is_empty_file = true
for line in str_gmatch(user_conf_yaml .. '\n', '(.-)\r?\n') do
if not is_empty_yaml_line(line) then
is_empty_file = false
break
end
end
if not is_empty_file then
local user_conf = yaml.load(user_conf_yaml)
if not user_conf then
return nil, "invalid config.yaml file"
end
local ok, err = resolve_conf_var(user_conf)
if not ok then
return nil, err
end
ok, err = merge_conf(default_conf, user_conf)
if not ok then
return nil, err
end
end
```
The ${{ VAR }} syntax is processed by `resolve_conf_var`, but it is only
called for user_conf.
To support it in config-default.yaml, run `resolve_conf_var` for
default_conf as well.
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