英文:
Parsing a multi valued custom variable in Grafana
问题
以下是代码片段：
max_over_time(PrometheusMetric_$Region{job="JOBNAME"}[1m])
这段代码使用了在Grafana中创建的名为Region的自定义变量，该变量可以取值{North_Europe, East_US, Southeast_Asia}。我希望在Grafana上查看指标时，能够选择同时查看2个或更多地区的图表。
当我选择2个或更多地区时，会出现以下错误：
bad_data: 1:89: parse error: unexpected character: '|'
请问有何修复建议。另外，这里的Region不是Prometheus标签，因此不能将其放在花括号内。
英文:
Following is the code snippet
max_over_time(PrometheusMetric_$Region{job="JOBNAME"}[1m])
which is taking a custom variable made in Grafana named Region which can take values from {North_Europe, East_US, Southeast_Asia}. I want that while viewing metrics on Grafana, we have the option to select 2 or more regions at a time to view the plots collectively.
When I select 2 or more regions, the following error is thrown.
bad_data: 1:89: parse error: unexpected character: '|'
What is the code fix suggested. Also Region here is not a prometheus label, so we cannot keep it inside curly braces.
答案1
得分: 1
假设您有一个具有值1，2和3的变量选择。这是在查询中如何扩展它的方式：
"$myvar" -> "(1|2|3)"
这就是unexpected character: ''|''来自的地方。
要在查询中使用多值变量，您需要使用正则匹配运算符：=~，例如：
foo=~"(1|2|3)"
幸运的是，指标名称也是一个标签，因此您可以尝试类似以下方式：
max_over_time({__name__=~"PrometheusMetric_$Region", job="JOBNAME"}[1m])
英文:
Suppose you have a variable with values 1, 2 and 3 selected. This is how it is expanded, if used in a query:
"$myvar" -> "(1|2|3)"
This is where the unexpected character: '|' comes from.
To use a multi-value variable inside a query you need to use the regex-match operator: =~, e.g.
foo=~"(1|2|3)"
Fortunately for you, metric name is also a label, so you may try something like this:
max_over_time({__name__=~"PrometheusMetric_$Region", job="JOBNAME"}[1m])
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