Prometheus (prometheus)

The prometheus endpoint provides Spring Boot application’s metrics in the format required for scraping by a Prometheus server.

Retrieving All Metrics

To retrieve all metrics, make a GET request to /actuator/prometheus, as shown in the following curl-based example:

$ curl 'http://localhost:8080/actuator/prometheus' -i -X GET

The resulting response is similar to the following:

HTTP/1.1 200 OK
Content-Type: text/plain;version=0.0.4;charset=utf-8
Content-Length: 3083

# HELP jvm_buffer_count_buffers An estimate of the number of buffers in the pool
# TYPE jvm_buffer_count_buffers gauge
jvm_buffer_count_buffers{id="direct"} 2.0
jvm_buffer_count_buffers{id="mapped"} 0.0
jvm_buffer_count_buffers{id="mapped - 'non-volatile memory'"} 0.0
# HELP jvm_buffer_memory_used_bytes An estimate of the memory that the Java virtual machine is using for this buffer pool
# TYPE jvm_buffer_memory_used_bytes gauge
jvm_buffer_memory_used_bytes{id="direct"} 36864.0
jvm_buffer_memory_used_bytes{id="mapped"} 0.0
jvm_buffer_memory_used_bytes{id="mapped - 'non-volatile memory'"} 0.0
# HELP jvm_buffer_total_capacity_bytes An estimate of the total capacity of the buffers in this pool
# TYPE jvm_buffer_total_capacity_bytes gauge
jvm_buffer_total_capacity_bytes{id="direct"} 36864.0
jvm_buffer_total_capacity_bytes{id="mapped"} 0.0
jvm_buffer_total_capacity_bytes{id="mapped - 'non-volatile memory'"} 0.0
# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use
# TYPE jvm_memory_committed_bytes gauge
jvm_memory_committed_bytes{area="heap",id="G1 Eden Space"} 7.340032E7
jvm_memory_committed_bytes{area="heap",id="G1 Old Gen"} 8.0740352E7
jvm_memory_committed_bytes{area="heap",id="G1 Survivor Space"} 7340032.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 2555904.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4521984.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.2020096E7
jvm_memory_committed_bytes{area="nonheap",id="Compressed Class Space"} 9043968.0
jvm_memory_committed_bytes{area="nonheap",id="Metaspace"} 8.1395712E7
# HELP jvm_memory_max_bytes The maximum amount of memory in bytes that can be used for memory management
# TYPE jvm_memory_max_bytes gauge
jvm_memory_max_bytes{area="heap",id="G1 Eden Space"} -1.0
jvm_memory_max_bytes{area="heap",id="G1 Old Gen"} 1.610612736E9
jvm_memory_max_bytes{area="heap",id="G1 Survivor Space"} -1.0
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 5832704.0
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 1.22916864E8
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 1.22908672E8
jvm_memory_max_bytes{area="nonheap",id="Compressed Class Space"} 1.073741824E9
jvm_memory_max_bytes{area="nonheap",id="Metaspace"} -1.0
# HELP jvm_memory_used_bytes The amount of used memory
# TYPE jvm_memory_used_bytes gauge
jvm_memory_used_bytes{area="heap",id="G1 Eden Space"} 4.5088768E7
jvm_memory_used_bytes{area="heap",id="G1 Old Gen"} 6.123152E7
jvm_memory_used_bytes{area="heap",id="G1 Survivor Space"} 7030528.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 1926912.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4516352.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.1990016E7
jvm_memory_used_bytes{area="nonheap",id="Compressed Class Space"} 8731856.0
jvm_memory_used_bytes{area="nonheap",id="Metaspace"} 8.0669328E7

The default response content type is text/plain;version=0.0.4. The endpoint can also produce application/openmetrics-text;version=1.0.0 when called with an appropriate Accept header, as shown in the following curl-based example:

$ curl 'http://localhost:8080/actuator/prometheus' -i -X GET \
    -H 'Accept: application/openmetrics-text; version=1.0.0; charset=utf-8'

The resulting response is similar to the following:

HTTP/1.1 200 OK
Content-Type: application/openmetrics-text;version=1.0.0;charset=utf-8
Content-Length: 3088

# TYPE jvm_buffer_count_buffers gauge
# HELP jvm_buffer_count_buffers An estimate of the number of buffers in the pool
jvm_buffer_count_buffers{id="direct"} 2.0
jvm_buffer_count_buffers{id="mapped"} 0.0
jvm_buffer_count_buffers{id="mapped - 'non-volatile memory'"} 0.0
# TYPE jvm_buffer_memory_used_bytes gauge
# HELP jvm_buffer_memory_used_bytes An estimate of the memory that the Java virtual machine is using for this buffer pool
jvm_buffer_memory_used_bytes{id="direct"} 36864.0
jvm_buffer_memory_used_bytes{id="mapped"} 0.0
jvm_buffer_memory_used_bytes{id="mapped - 'non-volatile memory'"} 0.0
# TYPE jvm_buffer_total_capacity_bytes gauge
# HELP jvm_buffer_total_capacity_bytes An estimate of the total capacity of the buffers in this pool
jvm_buffer_total_capacity_bytes{id="direct"} 36864.0
jvm_buffer_total_capacity_bytes{id="mapped"} 0.0
jvm_buffer_total_capacity_bytes{id="mapped - 'non-volatile memory'"} 0.0
# TYPE jvm_memory_committed_bytes gauge
# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use
jvm_memory_committed_bytes{area="heap",id="G1 Eden Space"} 7.340032E7
jvm_memory_committed_bytes{area="heap",id="G1 Old Gen"} 8.0740352E7
jvm_memory_committed_bytes{area="heap",id="G1 Survivor Space"} 7340032.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 2555904.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4521984.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.1889024E7
jvm_memory_committed_bytes{area="nonheap",id="Compressed Class Space"} 9043968.0
jvm_memory_committed_bytes{area="nonheap",id="Metaspace"} 8.1133568E7
# TYPE jvm_memory_max_bytes gauge
# HELP jvm_memory_max_bytes The maximum amount of memory in bytes that can be used for memory management
jvm_memory_max_bytes{area="heap",id="G1 Eden Space"} -1.0
jvm_memory_max_bytes{area="heap",id="G1 Old Gen"} 1.610612736E9
jvm_memory_max_bytes{area="heap",id="G1 Survivor Space"} -1.0
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 5832704.0
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 1.22916864E8
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 1.22908672E8
jvm_memory_max_bytes{area="nonheap",id="Compressed Class Space"} 1.073741824E9
jvm_memory_max_bytes{area="nonheap",id="Metaspace"} -1.0
# TYPE jvm_memory_used_bytes gauge
# HELP jvm_memory_used_bytes The amount of used memory
jvm_memory_used_bytes{area="heap",id="G1 Eden Space"} 4.2991616E7
jvm_memory_used_bytes{area="heap",id="G1 Old Gen"} 6.123152E7
jvm_memory_used_bytes{area="heap",id="G1 Survivor Space"} 7030528.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 1859712.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4512512.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.1882624E7
jvm_memory_used_bytes{area="nonheap",id="Compressed Class Space"} 8712488.0
jvm_memory_used_bytes{area="nonheap",id="Metaspace"} 8.046556E7
# EOF

Query Parameters

The endpoint uses query parameters to limit the samples that it returns. The following table shows the supported query parameters:

Parameter Description

includedNames

Restricts the samples to those that match the names. Optional.

Retrieving Filtered Metrics

To retrieve metrics matching specific names, make a GET request to /actuator/prometheus with the includedNames query parameter, as shown in the following curl-based example:

$ curl 'http://localhost:8080/actuator/prometheus?includedNames=jvm_memory_used_bytes%2Cjvm_memory_committed_bytes' -i -X GET

The resulting response is similar to the following:

HTTP/1.1 200 OK
Content-Type: text/plain;version=0.0.4;charset=utf-8
Content-Length: 1455

# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use
# TYPE jvm_memory_committed_bytes gauge
jvm_memory_committed_bytes{area="heap",id="G1 Eden Space"} 7.340032E7
jvm_memory_committed_bytes{area="heap",id="G1 Old Gen"} 8.0740352E7
jvm_memory_committed_bytes{area="heap",id="G1 Survivor Space"} 7340032.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 2555904.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4587520.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.2085632E7
jvm_memory_committed_bytes{area="nonheap",id="Compressed Class Space"} 9043968.0
jvm_memory_committed_bytes{area="nonheap",id="Metaspace"} 8.1395712E7
# HELP jvm_memory_used_bytes The amount of used memory
# TYPE jvm_memory_used_bytes gauge
jvm_memory_used_bytes{area="heap",id="G1 Eden Space"} 4.6137344E7
jvm_memory_used_bytes{area="heap",id="G1 Old Gen"} 6.123152E7
jvm_memory_used_bytes{area="heap",id="G1 Survivor Space"} 7030528.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 1918848.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4578048.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.2031744E7
jvm_memory_used_bytes{area="nonheap",id="Compressed Class Space"} 8732464.0
jvm_memory_used_bytes{area="nonheap",id="Metaspace"} 8.069168E7