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Constant Quality Monitoring
- technical details
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F.1.3. Authenticated access
Authenticate access requires a prefix of a hex sha1 string. e.g. http://host:port/cqm/longhexsha1/circuit.png or
http://host:port/cqm/longhexsha1/YYYY-MM-DD/circuit.png.
The SHA1 is 40 character hex of the SHA1 hash made from the graph name, the date, and the http-secret. The
date is in the form YYYY-MM-DD, and is today's date for undated access (based on local time).
This means a graph URL can be composed that is valid for a specific graph name for a specific day.
Note that an MD5 can also be used instead but the SHA1 is the preferred method.
F.2. Graph display options
The graphs can have a number of options which define the colours, text and layout. These are defined as http
form get attributes on the URL, e.g. http://host:port/cqm/circuit.png?H=a+heading.
Note that they can also be included in the path before the graph name, e.g. http://host:port/cqm/H=a+heading/
circuit.png in which case they can be separated by / rather than &.
The attributes are processed in order.
Note
These attributes apply to both png and svg output, however it is also possible to override the svg style
and use a css style sheet from a URL instead. In such cases none of the colour settings from the config
or the graph URL will apply. See an actual svg output for classes that are used in the graphs.
F.2.1. Data points
The data point controls can be included as either fieldname or fieldname=colour. To make a valid URL either
escape the # prefix or omit it. If any of these are included, then only those that are included are shown. If just
fieldname is specified then the default colour is applied. The text on the right shows what fields are included
and their colour key.
Table F.2. Colours
Key
Colour
M
Defines colour for minimum latency
A
Defines colour for average latency
X
Defines colour for max latency
U
Defines colour for upload rate
D
Defines colour for download rate
S
Defines colour for sent echos
J
Defines colour for rejected echos
F
Defines colour for failed (no response) echos
O
Defines colour for off-line
F.2.2. Additional text
Additional text is shown on the graph based on the values in the configuration if not specified. There are 4 lines
on the top left in small text and two heading lines top right in large text.
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