htop/pcp/meters/redis

#
# pcp-htop(1) configuration file - see pcp-htop(5)
#

[redisxact]
caption = Redis xact
description = Redis transactions
tps.metric = redis.instantaneous_ops_per_sec
tps.color = green

[redismem]
caption = Redis mem
description = Redis memory
lua.metric = redis.used_memory_lua
lua.color = magenta
used.metric = redis.used_memory
used.color = blue

[redisclient]
caption = Redis clients
description = Redis clients
type = bar
blocked.metric = redis.blocked_clients
blocked.color = blue
blocked.label = blk
clients.metric = redis.connected_clients
clients.color = green
clients.label = conn

[redisconn]
caption = Redis conn
description = Redis connections
type = bar
reject.metric = redis.rejected_connections
reject.color = magenta
reject.label = fail/s
total.metric = redis.total_connections_received
total.color = blue
total.label = conn/s
Add a new DynamicMeter class for runtime Meter extension 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. 2021-06-23 07:44:56 +00:00			`#`
			`# pcp-htop(1) configuration file - see pcp-htop(5)`
			`#`

			`[redisxact]`
			`caption = Redis xact`
			`description = Redis transactions`
			`tps.metric = redis.instantaneous_ops_per_sec`
			`tps.color = green`

			`[redismem]`
			`caption = Redis mem`
			`description = Redis memory`
			`lua.metric = redis.used_memory_lua`
			`lua.color = magenta`
			`used.metric = redis.used_memory`
			`used.color = blue`

			`[redisclient]`
			`caption = Redis clients`
			`description = Redis clients`
			`type = bar`
			`blocked.metric = redis.blocked_clients`
			`blocked.color = blue`
			`blocked.label = blk`
			`clients.metric = redis.connected_clients`
			`clients.color = green`
			`clients.label = conn`

			`[redisconn]`
			`caption = Redis conn`
			`description = Redis connections`
			`type = bar`
			`reject.metric = redis.rejected_connections`
			`reject.color = magenta`
			`reject.label = fail/s`
			`total.metric = redis.total_connections_received`
			`total.color = blue`
			`total.label = conn/s`