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This commit is based on exploratory work by Sohaib Mohamed. The end goal is two-fold - to support addition of Meters we build via configuration files for both the PCP platform and for scripts ( https://github.com/htop-dev/htop/issues/526 ) Here, we focus on generic code and the PCP support. A new class DynamicMeter is introduced - it uses the special case 'param' field handling that previously was used only by the CPUMeter, such that every runtime-configured Meter is given a unique identifier. Unlike with the CPUMeter this is used internally only. When reading/writing to htoprc instead of CPU(N) - where N is an integer param (CPU number) - we use the string name for each meter. For example, if we have a configuration for a DynamicMeter for some Redis metrics, we might read and write "Dynamic(redis)". This identifier is subsequently matched (back) up to the configuration file so we're able to re-create arbitrary user configurations. The PCP platform configuration file format is fairly simple. We expand configs from several directories, including the users homedir alongside htoprc (below htop/meters/) and also /etc/pcp/htop/meters. The format will be described via a new pcp-htop(5) man page, but its basically ini-style and each Meter has one or more metric expressions associated, as well as specifications for labels, color and so on via a dot separated notation for individual metrics within the Meter. A few initial sample configuration files are provided below ./pcp/meters that give the general idea. The PCP "derived" metric specification - see pmRegisterDerived(3) - is used as the syntax for specifying metrics in PCP DynamicMeters.
42 lines
880 B
Plaintext
42 lines
880 B
Plaintext
#
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# pcp-htop(1) configuration file - see pcp-htop(5)
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#
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[redisxact]
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caption = Redis xact
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description = Redis transactions
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tps.metric = redis.instantaneous_ops_per_sec
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tps.color = green
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[redismem]
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caption = Redis mem
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description = Redis memory
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lua.metric = redis.used_memory_lua
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lua.color = magenta
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lua.label = lua:
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used.metric = redis.used_memory
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used.color = blue
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used.label = used:
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[redisclient]
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caption = Redis clients
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description = Redis clients
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type = bar
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blocked.metric = redis.blocked_clients
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blocked.color = blue
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blocked.label = blk
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clients.metric = redis.connected_clients
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clients.color = green
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clients.label = conn
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[redisconn]
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caption = Redis conn
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description = Redis connections
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type = bar
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reject.metric = redis.rejected_connections
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reject.color = magenta
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reject.label = fail/s
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total.metric = redis.total_connections_received
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total.color = blue
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total.label = conn/s
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