log
Logback log level for this process: one of all, trace, debug, info, warn, error, off. Empty falls back to the role-specific env var (io.prometheus.common.EnvVars.PROXY_LOG_LEVEL or io.prometheus.common.EnvVars.AGENT_LOG_LEVEL) and then <role>.logLevel config; if still empty, the level configured in logback.xml is used.
Settable by subclasses (e.g. io.prometheus.proxy.ProxyOptions, io.prometheus.agent.AgentOptions) during assignConfigVals.