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Diffstat (limited to 'health/REFERENCE.md')
| -rw-r--r-- | health/REFERENCE.md | 64 |
1 files changed, 33 insertions, 31 deletions
diff --git a/health/REFERENCE.md b/health/REFERENCE.md index a36edd8c..e5179b4e 100644 --- a/health/REFERENCE.md +++ b/health/REFERENCE.md @@ -485,7 +485,7 @@ The full [database query API](https://github.com/netdata/netdata/blob/master/web `,` or `|` instead of spaces)_ and the `match-ids` and `match-names` options affect the searches for dimensions. -- `foreach DIMENSIONS` is optional, will always be the last parameter, and uses the same `,`/`|` +- `foreach DIMENSIONS` is optional and works only with [templates](#alarm-line-alarm-or-template), will always be the last parameter, and uses the same `,`/`|` rules as the `of` parameter. Each dimension you specify in `foreach` will use the same rule to trigger an alarm. If you set both `of` and `foreach`, Netdata will ignore the `of` parameter and replace it with one of the dimensions you gave to `foreach`. This option allows you to @@ -1068,18 +1068,18 @@ alarm to it. Check if user or system dimension is using more than 50% of cpu: ```yaml - alarm: dim_template - on: system.cpu - os: linux -lookup: average -3s percentage foreach system,user - units: % - every: 10s - warn: $this > 50 - crit: $this > 80 +template: cpu_template + on: system.cpu + os: linux + lookup: average -1m foreach system,user + units: % + every: 10s + warn: $this > 50 + crit: $this > 80 ``` -The `lookup` line will calculate the average CPU usage from system and user in the last 3 seconds. Because we have -the foreach in the `lookup` line, Netdata will create two independent alarms called `dim_template_system` +The `lookup` line will calculate the average CPU usage from system and user over the last minute. Because we have +the foreach in the `lookup` line, Netdata will create two independent alarms called `cpu_template_system` and `dim_template_user` that will have all the other parameters shared among them. ### Example 6 - CPU usage @@ -1087,17 +1087,17 @@ and `dim_template_user` that will have all the other parameters shared among the Check if all dimensions are using more than 50% of cpu: ```yaml - alarm: dim_template - on: system.cpu - os: linux -lookup: average -3s percentage foreach * - units: % - every: 10s - warn: $this > 50 - crit: $this > 80 +template: cpu_template + on: system.cpu + os: linux + lookup: average -1m foreach * + units: % + every: 10s + warn: $this > 50 + crit: $this > 80 ``` -The `lookup` line will calculate the average of CPU usage from system and user in the last 3 seconds. In this case +The `lookup` line will calculate the average of CPU usage from system and user over the last minute. In this case Netdata will create alarms for all dimensions of the chart. ### Example 7 - Z-Score based alarm @@ -1199,6 +1199,8 @@ Dimension templates can condense many individual entities into one—no more cop ### The fundamentals of `foreach` +> **Note**: works only with [templates](#alarm-line-alarm-or-template). + Our dimension templates update creates a new `foreach` parameter to the existing [`lookup` line](#alarm-line-lookup). This is where the magic happens. @@ -1224,38 +1226,38 @@ Before dimension templates, you would need the following three entities: ```yaml alarm: cpu_system on: system.cpu -lookup: average -10m percentage of system +lookup: average -10m of system every: 1m warn: $this > 50 crit: $this > 80 alarm: cpu_user on: system.cpu -lookup: average -10m percentage of user +lookup: average -10m of user every: 1m warn: $this > 50 crit: $this > 80 alarm: cpu_nice on: system.cpu -lookup: average -10m percentage of nice +lookup: average -10m of nice every: 1m warn: $this > 50 crit: $this > 80 ``` -With dimension templates, you can condense these into a single alarm. Take note of the `alarm` and `lookup` lines. +With dimension templates, you can condense these into a single template. Take note of the `alarm` and `lookup` lines. ```yaml - alarm: cpu_template - on: system.cpu -lookup: average -10m percentage foreach system,user,nice - every: 1m - warn: $this > 50 - crit: $this > 80 +template: cpu_template + on: system.cpu + lookup: average -10m foreach system,user,nice + every: 1m + warn: $this > 50 + crit: $this > 80 ``` -The `alarm` line specifies the naming scheme Netdata will use. You can use whatever naming scheme you'd like, with `.` +The `template` line specifies the naming scheme Netdata will use. You can use whatever naming scheme you'd like, with `.` and `_` being the only allowed symbols. The `lookup` line has changed from `of` to `foreach`, and we're now passing three dimensions. |