vmi_internal

const (
	COMPRESSOR_POOL_CONFIG_COMPRESSION_LEVEL_DEFAULT    = gzip.DefaultCompression
	COMPRESSOR_POOL_CONFIG_NUM_COMPRESSORS_DEFAULT      = -1
	COMPRESSOR_POOL_MAX_NUM_COMPRESSORS                 = 4
	COMPRESSOR_POOL_CONFIG_BUFFER_POOL_MAX_SIZE_DEFAULT = 64
	COMPRESSOR_POOL_CONFIG_METRICS_QUEUE_SIZE_DEFAULT   = 64
	COMPRESSOR_POOL_CONFIG_BATCH_TARGET_SIZE_DEFAULT    = "64k"
	COMPRESSOR_POOL_CONFIG_FLUSH_INTERVAL_DEFAULT       = 5 * time.Second
)

const (
	INITIAL_COMPRESSION_FACTOR         = 2.
	COMPRESSION_FACTOR_EXP_DECAY_ALPHA = 0.8
	// A compressed batch should be at least this size to be used for updating
	// the compression factor:
	COMPRESSED_BATCH_MIN_SIZE_FOR_CF = 128
)

const (
	COMPRESSOR_STATS_READ_COUNT = iota
	COMPRESSOR_STATS_READ_BYTE_COUNT
	COMPRESSOR_STATS_SEND_COUNT
	COMPRESSOR_STATS_SEND_BYTE_COUNT
	COMPRESSOR_STATS_TIMEOUT_FLUSH_COUNT
	COMPRESSOR_STATS_SEND_ERROR_COUNT
	COMPRESSOR_STATS_WRITE_ERROR_COUNT
	// Must be last:
	COMPRESSOR_STATS_UINT64_LEN
)

const (
	COMPRESSOR_STATS_COMPRESSION_FACTOR = iota
	// Must be last:
	COMPRESSOR_STATS_FLOAT64_LEN
)

const (
	VMI_CONFIG_SECTION_NAME = "vmi_config"
	GENERATORS_SECTION_NAME = "generators"

	VMI_CONFIG_USE_SHORT_HOSTNAME_DEFAULT = false
	VMI_CONFIG_SHUTDOWN_MAX_WAIT_DEFAULT  = 5 * time.Second
)

const (
	// Indexes into the per generator []int stats:
	METRICS_GENERATOR_INVOCATION_COUNT = iota
	METRICS_GENERATOR_METRICS_COUNT
	METRICS_GENERATOR_BYTE_COUNT
	// Must be last:
	METRICS_GENERATOR_NUM_STATS
)

const (
	// The order in the metrics cache:
	GO_NUM_GOROUTINE_METRIC_INDEX = iota
	GO_MEM_SYS_BYTES_METRIC_INDEX
	GO_MEM_HEAP_BYTES_METRIC_INDEX
	GO_MEM_HEAP_SYS_BYTES_METRIC_INDEX
	GO_MEM_MALLOCS_DELTA_METRIC_INDEX
	GO_MEM_FREE_DELTA_METRIC_INDEX
	GO_MEM_IN_USE_OBJECT_COUNT_METRIC_INDEX
	GO_MEM_NUM_GC_DELTA_METRIC_INDEX

	// Must be last:
	GO_INTERNAL_METRICS_NUM
)

const (
	// Endpoint default values:
	HTTP_ENDPOINT_URL_DEFAULT                      = "http://localhost:8428/api/v1/import/prometheus"
	HTTP_ENDPOINT_MARK_UNHEALTHY_THRESHOLD_DEFAULT = 1

	// Endpoint config pool default values:
	HTTP_ENDPOINT_POOL_CONFIG_SHUFFLE_DEFAULT                 = false
	HTTP_ENDPOINT_POOL_CONFIG_HEALTHY_ROTATE_INTERVAL_DEFAULT = 5 * time.Minute
	HTTP_ENDPOINT_POOL_CONFIG_ERROR_RESET_INTERVAL_DEFAULT    = 1 * time.Minute
	HTTP_ENDPOINT_POOL_CONFIG_HEALTH_CHECK_INTERVAL_DEFAULT   = 5 * time.Second
	HTTP_ENDPOINT_POOL_CONFIG_HEALTHY_MAX_WAIT_DEFAULT        = 10 * time.Second
	HTTP_ENDPOINT_POOL_CONFIG_SEND_BUFFER_TIMEOUT_DEFAULT     = 20 * time.Second
	HTTP_ENDPOINT_POOL_CONFIG_RATE_LIMIT_MBPS_DEFAULT         = ""
	// Endpoint config definitions, later they may be configurable:
	HTTP_ENDPOINT_POOL_HEALTHY_CHECK_MIN_INTERVAL    = 1 * time.Second
	HTTP_ENDPOINT_POOL_HEALTHY_POLL_INTERVAL         = 500 * time.Millisecond
	HTTP_ENDPOINT_POOL_HEALTH_CHECK_ERR_LOG_INTERVAL = 10 * time.Second

	// http.Transport config default values:
	//   Dialer config default values:
	HTTP_ENDPOINT_POOL_CONFIG_TCP_CONN_TIMEOUT_DEFAULT        = 2 * time.Second
	HTTP_ENDPOINT_POOL_CONFIG_TCP_KEEP_ALIVE_DEFAULT          = 15 * time.Second
	HTTP_ENDPOINT_POOL_CONFIG_MAX_IDLE_CONNS_DEFAULT          = 0 // No limit
	HTTP_ENDPOINT_POOL_CONFIG_MAX_IDLE_CONNS_PER_HOST_DEFAULT = 1
	HTTP_ENDPOINT_POOL_CONFIG_MAX_CONNS_PER_HOST_DEFAULT      = 0 // No limit
	HTTP_ENDPOINT_POOL_CONFIG_IDLE_CONN_TIMEOUT_DEFAULT       = 1 * time.Minute
	// http.Client config default values:
	HTTP_ENDPOINT_POOL_CONFIG_RESPONSE_TIMEOUT_DEFAULT = 5 * time.Second

	// Prefixes for the password field:
	HTTP_ENDPOINT_POOL_CONFIG_PASSWORD_FILE_PREFIX = "file:"
	HTTP_ENDPOINT_POOL_CONFIG_PASSWORD_ENV_PREFIX  = "env:"
	HTTP_ENDPOINT_POOL_CONFIG_PASSWORD_PASS_PREFIX = "pass:"
)

const (
	HTTP_ENDPOINT_STATS_SEND_BUFFER_COUNT = iota
	HTTP_ENDPOINT_STATS_SEND_BUFFER_BYTE_COUNT
	HTTP_ENDPOINT_STATS_SEND_BUFFER_ERROR_COUNT
	HTTP_ENDPOINT_STATS_HEALTH_CHECK_COUNT
	HTTP_ENDPOINT_STATS_HEALTH_CHECK_ERROR_COUNT
	// Must be last:
	HTTP_ENDPOINT_STATS_LEN
)

const (
	HTTP_ENDPOINT_POOL_STATS_HEALTHY_ROTATE_COUNT = iota
	HTTP_ENDPOINT_POOL_STATS_NO_HEALTHY_EP_ERROR_COUNT
	// Must be last:
	HTTP_ENDPOINT_POOL_STATS_LEN
)

const (
	INTERNAL_METRICS_CONFIG_INTERVAL_DEFAULT            = 5 * time.Second
	INTERNAL_METRICS_CONFIG_FULL_METRICS_FACTOR_DEFAULT = 12

	// This generator id:
	INTERNAL_METRICS_ID = "internal_metrics"
)

const (
	// The following labels are common to all metrics:
	INSTANCE_LABEL_NAME = "vmi_inst"
	HOSTNAME_LABEL_NAME = "hostname"

	// Deltas since previous internal metrics interval:
	COMPRESSOR_STATS_READ_DELTA_METRIC          = "vmi_compressor_read_delta"
	COMPRESSOR_STATS_READ_BYTE_DELTA_METRIC     = "vmi_compressor_read_byte_delta"
	COMPRESSOR_STATS_SEND_DELTA_METRIC          = "vmi_compressor_send_delta"
	COMPRESSOR_STATS_SEND_BYTE_DELTA_METRIC     = "vmi_compressor_send_byte_delta"
	COMPRESSOR_STATS_TIMEOUT_FLUSH_DELTA_METRIC = "vmi_compressor_tout_flush_delta"
	COMPRESSOR_STATS_SEND_ERROR_DELTA_METRIC    = "vmi_compressor_send_error_delta"
	COMPRESSOR_STATS_WRITE_ERROR_DELTA_METRIC   = "vmi_compressor_write_error_delta"
	COMPRESSOR_STATS_COMPRESSION_FACTOR_METRIC  = "vmi_compressor_compression_factor"

	COMPRESSOR_ID_LABEL_NAME = "compressor"

	// Invocation, metric and byte counts for the generator:
	METRICS_GENERATOR_INVOCATION_DELTA_METRIC = "vmi_metrics_gen_invocation_delta"
	METRICS_GENERATOR_METRICS_DELTA_METRIC    = "vmi_metrics_gen_metrics_delta"
	METRICS_GENERATOR_BYTE_DELTA_METRIC       = "vmi_metrics_gen_byte_delta"

	// Actual interval since the previous invocation. It should be closed to the
	// configured interval, but may be longer if the generator is busy. It could
	// be used to calculate the rates out of deltas
	METRICS_GENERATOR_DTIME_METRIC           = "vmi_metrics_gen_dtime_sec"
	METRICS_GENERATOR_DTIME_METRIC_PRECISION = 6

	METRICS_GENERATOR_ID_LABEL_NAME = "gen_id"

	GO_NUM_GOROUTINE_METRIC           = "vmi_go_num_goroutine"
	GO_MEM_SYS_BYTES_METRIC           = "vmi_go_mem_sys_bytes"
	GO_MEM_HEAP_BYTES_METRIC          = "vmi_go_mem_heap_bytes"
	GO_MEM_HEAP_SYS_BYTES_METRIC      = "vmi_go_mem_heap_sys_bytes"
	GO_MEM_IN_USE_OBJECT_COUNT_METRIC = "vmi_go_mem_in_use_object_count"

	// Deltas since previous internal metrics interval:
	GO_MEM_MALLOCS_DELTA_METRIC = "vmi_go_mem_malloc_delta"
	GO_MEM_FREE_DELTA_METRIC    = "vmi_go_mem_free_delta"
	GO_MEM_NUM_GC_DELTA_METRIC  = "vmi_go_mem_gc_delta"

	// Deltas since previous internal metrics interval:
	HTTP_ENDPOINT_STATS_SEND_BUFFER_DELTA_METRIC        = "vmi_http_ep_send_buffer_delta"
	HTTP_ENDPOINT_STATS_SEND_BUFFER_BYTE_DELTA_METRIC   = "vmi_http_ep_send_buffer_byte_delta"
	HTTP_ENDPOINT_STATS_SEND_BUFFER_ERROR_DELTA_METRIC  = "vmi_http_ep_send_buffer_error_delta"
	HTTP_ENDPOINT_STATS_HEALTH_CHECK_DELTA_METRIC       = "vmi_http_ep_healthcheck_delta"
	HTTP_ENDPOINT_STATS_HEALTH_CHECK_ERROR_DELTA_METRIC = "vmi_http_ep_healthcheck_error_delta"

	// Labels:
	HTTP_ENDPOINT_STATS_STATE_LABEL = "state"
	HTTP_ENDPOINT_URL_LABEL_NAME    = "url"

	// Deltas since previous internal metrics interval:
	HTTP_ENDPOINT_POOL_STATS_HEALTHY_ROTATE_DELTA_METRIC      = "vmi_http_ep_pool_healthy_rotate_delta"
	HTTP_ENDPOINT_POOL_STATS_NO_HEALTHY_EP_ERROR_DELTA_METRIC = "vmi_http_ep_pool_no_healthy_ep_error_delta"

	// Importer metric:
	VMI_UPTIME_METRIC = "vmi_uptime_sec" // heartbeat

	VMI_BUILD_INFO_METRIC   = "vmi_build_info"
	VMI_VERSION_LABEL_NAME  = "vmi_version"
	VMI_GIT_INFO_LABEL_NAME = "vmi_git_info"

	// OS metrics:
	OS_INFO_METRIC          = "vmi_os_info"
	OS_INFO_LABEL_PREFIX    = "os_info_" // prefix + OSInfoLabelKeys
	OS_RELEASE_METRIC       = "vmi_os_release"
	OS_RELEASE_LABEL_PREFIX = "os_rel_" // prefix + OSReleaseLabelKeys
	OS_UPTIME_METRIC        = "vmi_os_uptime_sec"

	UPTIME_METRIC_PRECISION = 6

	// %CPU over internal metrics interval:
	VMI_PROC_PCPU_METRIC = "vmi_proc_pcpu"

	TASK_STATS_SCHEDULED_DELTA_METRIC       = "vmi_task_scheduled_delta"
	TASK_STATS_DELAYED_DELTA_METRIC         = "vmi_task_delayed_delta"
	TASK_STATS_OVERRUN_DELTA_METRIC         = "vmi_task_overrun_delta"
	TASK_STATS_EXECUTED_DELTA_METRIC        = "vmi_task_executed_delta"
	TASK_STATS_NEXT_TS_HACK_DELTA_METRIC    = "vmi_task_next_ts_hack_delta"
	TASK_STATS_AVG_RUNTIME_METRIC           = "vmi_task_avg_runtime_sec"
	TASK_STATS_AVG_RUNTIME_METRIC_PRECISION = 6

	// Re-use generator ID label since they have the same value:
	TASK_STATS_TASK_ID_LABEL_NAME = METRICS_GENERATOR_ID_LABEL_NAME
)

const (
	CREDIT_NO_LIMIT    = 0
	CREDIT_EXACT_MATCH = 0
)

const (
	READ_FILE_BUF_POOL_MAX_SIZE_UNBOUND      = 0
	READ_FILE_BUF_POOL_MAX_READ_SIZE_UNBOUND = 0
)

const (
	CONFIG_FLAG_NAME = "config"
	INSTANCE_DEFAULT = "vmi"
)

const (
	SCHEDULER_CONFIG_NUM_WORKERS_DEFAULT = -1
	SCHEDULER_MAX_NUM_WORKERS            = 8
)

const (
	SCHEDULER_TASK_Q_LEN = 64
	SCHEDULER_TODO_Q_LEN = 64
	// All intervals will be rounded to be a multiple of scheduler's granularity:
	SCHEDULER_GRANULARITY = 20 * time.Millisecond
	// The minimum pause between 2 consecutive executions of the same task:
	SCHEDULER_TASK_MIN_EXECUTION_PAUSE = 2 * SCHEDULER_GRANULARITY
)

const (

	// How many times the task was scheduled:
	TASK_STATS_SCHEDULED_COUNT = iota

	// How many times the task was delayed because it was too close to its
	// previous execution:
	TASK_STATS_DELAYED_COUNT

	// How many times the task overran, i.e. its runtime >= interval:
	TASK_STATS_OVERRUN_COUNT

	// How many times the task was executed:
	TASK_STATS_EXECUTED_COUNT

	// How many times the next scheduling time was hacked to counter the wall
	// clock seemingly going backwards (see AddNewTask):
	TASK_STATS_NEXT_TS_HACK_COUNT

	// Total runtime of the task, in microseconds.
	TASK_STATS_TOTAL_RUNTIME

	// Must be last:
	TASK_STATS_UINT64_LEN
)

const (
	// The help usage message line wraparound default width:
	DEFAULT_FLAG_USAGE_WIDTH = 58
)

const (
	GENERATOR_RUNTIME_UNAVAILABLE = -1.
)