红帽全球峰会3.6. 管理 CLI 操作
3.6.1. 用管理 CLI 显示资源属性
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概述
read-attribute 操作是一个用来读取选定属性的当前 runtime 值的全局操作。它可以用来只开放用户设置的值而忽略任何默认或未定义的值。请求属性包括下列参数。
请求属性
name- 获取所选资源下的值的属性的名称。
include-defaults- 布尔型参数，可以设置为
false来限制操作结果，只显示用户设置的属性并忽略默认的值。
过程 3.13. 显示所选属性的当前 Runtime 值
运行
read-attribute操作在管理 CLI 里，使用read-attribute操作来显示资源属性的值。关于操作请求的更多细节，请参考 第 3.5.8 节 “在管理 CLI 里使用操作和命令”。[standalone@localhost:9999 /]:read-attribute(name=name-of-attribute)
read-attribute 操作的优势是开放专有属性的当前 runtime 值的能力。用 read-resource 操作可获得类似的结果，但只能通过 include-runtime 请求属性，而且只作为该节点的所有可用资源的列表的一部分。read-attribute 操作用于细颗粒度的属性查询，如下例所示。
例 3.7. 运行 read-attribute 操作来开放公共的接口 IP。
如果您知道要开放的属性的名称，您可以使用
read-attribute 来获取当前 runtime 里的确切的值。
[standalone@localhost:9999 /] /interface=public:read-attribute(name=resolved-address)
{
"outcome" => "success",
"result" => "127.0.0.1"
}
resolved-address 属性是一个 runtime 值，所以不会显示在标准的 read-resource 操作的结果里。
[standalone@localhost:9999 /] /interface=public:read-resource
{
"outcome" => "success",
"result" => {
"any" => undefined,
"any-address" => undefined,
"any-ipv4-address" => undefined,
"any-ipv6-address" => undefined,
"inet-address" => expression "${jboss.bind.address:127.0.0.1}",
"link-local-address" => undefined,
"loopback" => undefined,
"loopback-address" => undefined,
"multicast" => undefined,
"name" => "public",
"nic" => undefined,
"nic-match" => undefined,
"not" => undefined,
"point-to-point" => undefined,
"public-address" => undefined,
"site-local-address" => undefined,
"subnet-match" => undefined,
"up" => undefined,
"virtual" => undefined
}
}
要显示
resolved-address 和其他 runtime 值，您必须使用 include-runtime 请求属性。
[standalone@localhost:9999 /] /interface=public:read-resource(include-runtime=true)
{
"outcome" => "success",
"result" => {
"any" => undefined,
"any-address" => undefined,
"any-ipv4-address" => undefined,
"any-ipv6-address" => undefined,
"inet-address" => expression "${jboss.bind.address:127.0.0.1}",
"link-local-address" => undefined,
"loopback" => undefined,
"loopback-address" => undefined,
"multicast" => undefined,
"name" => "public",
"nic" => undefined,
"nic-match" => undefined,
"not" => undefined,
"point-to-point" => undefined,
"public-address" => undefined,
"resolved-address" => "127.0.0.1",
"site-local-address" => undefined,
"subnet-match" => undefined,
"up" => undefined,
"virtual" => undefined
}
}
结果
显示当前的 runtime 属性值。
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