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config: Add prometheus_allow_protobuf flag

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Native histograms (also known as sparse histograms) are an experimental
Prometheus feature. They use protobuf as the reporting layer.  The
prometheus_allow_protobuf flag allows the user to enable protobuf
protocol. When this flag is set to true, and the Prometheus server sends
in the request that it accepts protobuf, the result will be in protobuf
protocol.

Signed-off-by: Amnon Heiman <amnon@scylladb.com>
This commit is contained in:
Amnon Heiman
2024-01-23 12:53:31 +02:00
parent 33794eca19
commit fc9bd2de03
2 changed files with 2 additions and 0 deletions
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1
db/config.cc
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@@ -970,6 +970,7 @@ db::config::config(std::shared_ptr<db::extensions> exts)
, prometheus_port(this, "prometheus_port", value_status::Used, 9180, "Prometheus port, set to zero to disable.")
, prometheus_address(this, "prometheus_address", value_status::Used, {/* listen_address */}, "Prometheus listening address, defaulting to listen_address if not explicitly set.")
, prometheus_prefix(this, "prometheus_prefix", value_status::Used, "scylla", "Set the prefix of the exported Prometheus metrics. Changing this will break Scylla's dashboard compatibility, do not change unless you know what you are doing.")
, prometheus_allow_protobuf(this, "prometheus_allow_protobuf", value_status::Used, false, "If set allows the experimental Prometheus protobuf with native histogram")
, abort_on_lsa_bad_alloc(this, "abort_on_lsa_bad_alloc", value_status::Used, false, "Abort when allocation in LSA region fails.")
, murmur3_partitioner_ignore_msb_bits(this, "murmur3_partitioner_ignore_msb_bits", value_status::Used, default_murmur3_partitioner_ignore_msb_bits, "Number of most significant token bits to ignore in murmur3 partitioner; increase for very large clusters.")
, unspooled_dirty_soft_limit(this, "unspooled_dirty_soft_limit", value_status::Used, 0.6, "Soft limit of unspooled dirty memory expressed as a portion of the hard limit.")

1
db/config.hh
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@@ -351,6 +351,7 @@ public:
named_value<uint16_t> prometheus_port;
named_value<sstring> prometheus_address;
named_value<sstring> prometheus_prefix;
named_value<bool> prometheus_allow_protobuf;
named_value<bool> abort_on_lsa_bad_alloc;
named_value<unsigned> murmur3_partitioner_ignore_msb_bits;
named_value<double> unspooled_dirty_soft_limit;