书写俄歇镜头

Question

我需要编辑/etc/mongodb.conf 中的一行

auth = true

Augas有一个mongo镜头，但它只适用于大于1.0 的Augas

我完全被augeas 0.9卡住了，因为它是epel repo中的最新版本，我无法从github编译augeas。

作为一个变通方案，我正在尝试编写我自己的augeas镜头，它将在augeas 0.9 上工作

到目前为止，我只有这个

module Spencer =
autoload xfm
let entry = key /[a-z]+/ . del /[ t]*=[ t]*/ "=" . store /[a-z]+/
let lns = [ entry . del "n" "n" ] *
test lns get "auth = falsenfoo = barn" = ?
let filter = incl "/etc/mongodb.conf"
let xfm = transform lns filter

当我尝试使用木偶类型将镜头应用于/etc/mongodb.conf时，我会得到一个错误"迭代镜头匹配得比它应该匹配的少"。

puppet apply augmongo.pp --debug --verbose  --summarize
Info: Applying configuration version '1385024927'
Debug: Augeas[auth-mongo](provider=augeas): Opening augeas with root /, lens path , flags 64
Debug: Augeas[auth-mongo](provider=augeas): Augeas version 0.9.0 is installed
Test result: /usr/share/augeas/lenses/dist/spencer.aug:8.0-.44:
  { "auth" = "false" }
  { "foo" = "bar" }
Debug: Augeas[auth-mongo](provider=augeas): Will attempt to save and only run if files changed
Debug: Augeas[auth-mongo](provider=augeas): sending command 'set' with params ["/files/etc/mongodb.conf/auth", "true"]
Debug: Augeas[auth-mongo](provider=augeas): Put failed on one or more files, output from /augeas//error:
Debug: Augeas[auth-mongo](provider=augeas): /augeas/files/etc/mongodb.conf/error = put_failed
Debug: Augeas[auth-mongo](provider=augeas): /augeas/files/etc/mongodb.conf/error/pos = 1
Debug: Augeas[auth-mongo](provider=augeas): /augeas/files/etc/mongodb.conf/error/lens = /usr/share/augeas/lenses/dist/spencer.aug:6.10-.37:
Debug: Augeas[auth-mongo](provider=augeas): /augeas/files/etc/mongodb.conf/error/message = Iterated lens matched less than it should
Debug: Augeas[auth-mongo](provider=augeas): Closed the augeas connection
Error: /Stage[main]/Augmongo/Augeas[auth-mongo]: Could not evaluate: Save failed with return code false, see debug
Debug: Finishing transaction 69857417180740
Debug: Storing state
Debug: Stored state in 0.13 seconds

---

这个镜头怎么了
我如何从命令行测试镜头，并将木偶从等式中删除？

Answer 1

RHEL 6.4刚刚升级到Augas 1.0。看见https://rhn.redhat.com/errata/RHSA-2013-1537.html.

您应该能够重新构建程序包，或者等待CentOS为您执行此操作。

Answer 2

我在augeas&木偶应用更改似乎每次都以错误Could not evaluate: Save failed with return code false结束。结果发现这是一个语法问题。我有：

set spec[user = '%somegroup']/host_group/command/tag  NOPASSWD

（注意tag和NOPASSWD之间有两个空格）。当我在一个空白处尝试相同的命令时，问题就解决了。查看模板/镜头（spencer.au，第6.10-.37行）可能会发现问题所在。