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| -rw-r--r-- | exporting/json/Makefile.am | 4 | ||||
| l--------- | exporting/json/README.md | 1 | ||||
| -rw-r--r-- | exporting/json/integrations/json.md | 147 | ||||
| -rw-r--r-- | exporting/json/json.c | 349 | ||||
| -rw-r--r-- | exporting/json/json.h | 21 | ||||
| -rw-r--r-- | exporting/json/metadata.yaml | 151 |
6 files changed, 673 insertions, 0 deletions
diff --git a/exporting/json/Makefile.am b/exporting/json/Makefile.am new file mode 100644 index 00000000..babdcf0d --- /dev/null +++ b/exporting/json/Makefile.am @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-3.0-or-later + +AUTOMAKE_OPTIONS = subdir-objects +MAINTAINERCLEANFILES = $(srcdir)/Makefile.in diff --git a/exporting/json/README.md b/exporting/json/README.md new file mode 120000 index 00000000..0a8793ca --- /dev/null +++ b/exporting/json/README.md @@ -0,0 +1 @@ +integrations/json.md
\ No newline at end of file diff --git a/exporting/json/integrations/json.md b/exporting/json/integrations/json.md new file mode 100644 index 00000000..ab4699d9 --- /dev/null +++ b/exporting/json/integrations/json.md @@ -0,0 +1,147 @@ +<!--startmeta +custom_edit_url: "https://github.com/netdata/netdata/edit/master/exporting/json/README.md" +meta_yaml: "https://github.com/netdata/netdata/edit/master/exporting/json/metadata.yaml" +sidebar_label: "JSON" +learn_status: "Published" +learn_rel_path: "Exporting" +message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE EXPORTER'S metadata.yaml FILE" +endmeta--> + +# JSON + + +<img src="https://netdata.cloud/img/json.svg" width="150"/> + + +Use the JSON connector for the exporting engine to archive your agent's metrics to JSON document databases for long-term storage, +further analysis, or correlation with data from other sources + + + +<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" /> + +## Setup + +### Prerequisites + +#### + + + + +### Configuration + +#### File + +The configuration file name for this integration is `exporting.conf`. + + +You can edit the configuration file using the `edit-config` script from the +Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#the-netdata-config-directory). + +```bash +cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata +sudo ./edit-config exporting.conf +``` +#### Options + +The following options can be defined for this exporter. + + +<details><summary>Config options</summary> + +| Name | Description | Default | Required | +|:----|:-----------|:-------|:--------:| +| enabled | Enables or disables an exporting connector instance (yes/no). | no | yes | +| destination | Accepts a space separated list of hostnames, IPs (IPv4 and IPv6) and ports to connect to. Netdata will use the first available to send the metrics. | pubsub.googleapis.com | yes | +| username | Username for HTTP authentication | my_username | no | +| password | Password for HTTP authentication | my_password | no | +| data source | Selects the kind of data that will be sent to the external database. (as collected/average/sum) | | no | +| hostname | The hostname to be used for sending data to the external database server. | [global].hostname | no | +| prefix | The prefix to add to all metrics. | Netdata | no | +| update every | Frequency of sending sending data to the external database, in seconds. | 10 | no | +| buffer on failures | The number of iterations (`update every` seconds) to buffer data, when the external database server is not available. | 10 | no | +| timeout ms | The timeout in milliseconds to wait for the external database server to process the data. | 2 * update_every * 1000 | no | +| send hosts matching | Hosts filter. Determines which hosts will be sent to the external database. The syntax is [simple patterns](https://github.com/netdata/netdata/tree/master/libnetdata/simple_pattern#simple-patterns). | localhost * | no | +| send charts matching | One or more space separated patterns (use * as wildcard) checked against both chart id and chart name. | * | no | +| send names instead of ids | Controls the metric names Netdata should send to the external database (yes/no). | | no | +| send configured labels | Controls if host labels defined in the `[host labels]` section in `netdata.conf` should be sent to the external database (yes/no). | | no | +| send automatic labels | Controls if automatically created labels, like `_os_name` or `_architecture` should be sent to the external database (yes/no). | | no | + +##### destination + +The format of each item in this list, is: [PROTOCOL:]IP[:PORT]. +- PROTOCOL can be udp or tcp. tcp is the default and only supported by the current exporting engine. +- IP can be XX.XX.XX.XX (IPv4), or [XX:XX...XX:XX] (IPv6). For IPv6 you can to enclose the IP in [] to separate it from the port. +- PORT can be a number of a service name. If omitted, the default port for the exporting connector will be used. + +Example IPv4: + ```yaml + destination = localhost:5448 + ``` +When multiple servers are defined, Netdata will try the next one when the previous one fails. + + +##### update every + +Netdata will add some randomness to this number, to prevent stressing the external server when many Netdata servers +send data to the same database. This randomness does not affect the quality of the data, only the time they are sent. + + +##### buffer on failures + +If the server fails to receive the data after that many failures, data loss on the connector instance is expected (Netdata will also log it). + + +##### send hosts matching + +Includes one or more space separated patterns, using * as wildcard (any number of times within each pattern). +The patterns are checked against the hostname (the localhost is always checked as localhost), allowing us to +filter which hosts will be sent to the external database when this Netdata is a central Netdata aggregating multiple hosts. + +A pattern starting with `!` gives a negative match. So to match all hosts named `*db*` except hosts containing `*child*`, +use `!*child* *db*` (so, the order is important: the first pattern matching the hostname will be used - positive or negative). + + +##### send charts matching + +A pattern starting with ! gives a negative match. So to match all charts named apps.* except charts ending in *reads, +use !*reads apps.* (so, the order is important: the first pattern matching the chart id or the chart name will be used, +positive or negative). There is also a URL parameter filter that can be used while querying allmetrics. The URL parameter +has a higher priority than the configuration option. + + +##### send names instead of ids + +Netdata supports names and IDs for charts and dimensions. Usually IDs are unique identifiers as read by the system and names +are human friendly labels (also unique). Most charts and metrics have the same ID and name, but in several cases they are +different : disks with device-mapper, interrupts, QoS classes, statsd synthetic charts, etc. + + +</details> + +#### Examples + +##### Basic configuration + + + +```yaml +[json:my_json_instance] + enabled = yes + destination = localhost:5448 + +``` +##### Configuration with HTTPS and HTTP authentication + +Add `:https` modifier to the connector type if you need to use the TLS/SSL protocol. For example: `json:https:my_json_instance`. + +```yaml +[json:my_json_instance] + enabled = yes + destination = localhost:5448 + username = my_username + password = my_password + +``` + diff --git a/exporting/json/json.c b/exporting/json/json.c new file mode 100644 index 00000000..d916fe77 --- /dev/null +++ b/exporting/json/json.c @@ -0,0 +1,349 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "json.h" + +/** + * Initialize JSON connector instance + * + * @param instance an instance data structure. + * @return Returns 0 on success, 1 on failure. + */ +int init_json_instance(struct instance *instance) +{ + instance->worker = simple_connector_worker; + + struct simple_connector_config *connector_specific_config = callocz(1, sizeof(struct simple_connector_config)); + instance->config.connector_specific_config = (void *)connector_specific_config; + connector_specific_config->default_port = 5448; + + struct simple_connector_data *connector_specific_data = callocz(1, sizeof(struct simple_connector_data)); + instance->connector_specific_data = connector_specific_data; + + instance->start_batch_formatting = NULL; + instance->start_host_formatting = format_host_labels_json_plaintext; + instance->start_chart_formatting = NULL; + + if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED) + instance->metric_formatting = format_dimension_collected_json_plaintext; + else + instance->metric_formatting = format_dimension_stored_json_plaintext; + + instance->end_chart_formatting = NULL; + instance->variables_formatting = NULL; + instance->end_host_formatting = flush_host_labels; + instance->end_batch_formatting = simple_connector_end_batch; + + instance->prepare_header = NULL; + + instance->check_response = exporting_discard_response; + + instance->buffer = (void *)buffer_create(0, &netdata_buffers_statistics.buffers_exporters); + if (!instance->buffer) { + netdata_log_error("EXPORTING: cannot create buffer for json exporting connector instance %s", instance->config.name); + return 1; + } + + simple_connector_init(instance); + + if (uv_mutex_init(&instance->mutex)) + return 1; + if (uv_cond_init(&instance->cond_var)) + return 1; + + return 0; +} + +/** + * Initialize JSON connector instance for HTTP protocol + * + * @param instance an instance data structure. + * @return Returns 0 on success, 1 on failure. + */ +int init_json_http_instance(struct instance *instance) +{ + instance->worker = simple_connector_worker; + + struct simple_connector_config *connector_specific_config = callocz(1, sizeof(struct simple_connector_config)); + instance->config.connector_specific_config = (void *)connector_specific_config; + connector_specific_config->default_port = 5448; + + struct simple_connector_data *connector_specific_data = callocz(1, sizeof(struct simple_connector_data)); + instance->connector_specific_data = connector_specific_data; + +#ifdef ENABLE_HTTPS + connector_specific_data->ssl = NETDATA_SSL_UNSET_CONNECTION; + if (instance->config.options & EXPORTING_OPTION_USE_TLS) { + netdata_ssl_initialize_ctx(NETDATA_SSL_EXPORTING_CTX); + } +#endif + + instance->start_batch_formatting = open_batch_json_http; + instance->start_host_formatting = format_host_labels_json_plaintext; + instance->start_chart_formatting = NULL; + + if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED) + instance->metric_formatting = format_dimension_collected_json_plaintext; + else + instance->metric_formatting = format_dimension_stored_json_plaintext; + + instance->end_chart_formatting = NULL; + instance->variables_formatting = NULL; + instance->end_host_formatting = flush_host_labels; + instance->end_batch_formatting = close_batch_json_http; + + instance->prepare_header = json_http_prepare_header; + + instance->check_response = exporting_discard_response; + + instance->buffer = (void *)buffer_create(0, &netdata_buffers_statistics.buffers_exporters); + + simple_connector_init(instance); + + if (uv_mutex_init(&instance->mutex)) + return 1; + if (uv_cond_init(&instance->cond_var)) + return 1; + + return 0; +} + +/** + * Format host labels for JSON connector + * + * @param instance an instance data structure. + * @param host a data collecting host. + * @return Always returns 0. + */ + +int format_host_labels_json_plaintext(struct instance *instance, RRDHOST *host) +{ + if (!instance->labels_buffer) + instance->labels_buffer = buffer_create(1024, &netdata_buffers_statistics.buffers_exporters); + + if (unlikely(!sending_labels_configured(instance))) + return 0; + + buffer_strcat(instance->labels_buffer, "\"labels\":{"); + rrdlabels_to_buffer(host->rrdlabels, instance->labels_buffer, "", ":", "\"", ",", + exporting_labels_filter_callback, instance, + NULL, sanitize_json_string); + buffer_strcat(instance->labels_buffer, "},"); + + return 0; +} + +/** + * Format dimension using collected data for JSON connector + * + * @param instance an instance data structure. + * @param rd a dimension. + * @return Always returns 0. + */ +int format_dimension_collected_json_plaintext(struct instance *instance, RRDDIM *rd) +{ + RRDSET *st = rd->rrdset; + RRDHOST *host = st->rrdhost; + + const char *tags_pre = "", *tags_post = "", *tags = rrdhost_tags(host); + if (!tags) + tags = ""; + + if (*tags) { + if (*tags == '{' || *tags == '[' || *tags == '"') { + tags_pre = "\"host_tags\":"; + tags_post = ","; + } else { + tags_pre = "\"host_tags\":\""; + tags_post = "\","; + } + } + + if (instance->config.type == EXPORTING_CONNECTOR_TYPE_JSON_HTTP) { + if (buffer_strlen((BUFFER *)instance->buffer) > 2) + buffer_strcat(instance->buffer, ",\n"); + } + + buffer_sprintf( + instance->buffer, + + "{" + "\"prefix\":\"%s\"," + "\"hostname\":\"%s\"," + "%s%s%s" + "%s" + + "\"chart_id\":\"%s\"," + "\"chart_name\":\"%s\"," + "\"chart_family\":\"%s\"," + "\"chart_context\":\"%s\"," + "\"chart_type\":\"%s\"," + "\"units\":\"%s\"," + + "\"id\":\"%s\"," + "\"name\":\"%s\"," + "\"value\":" COLLECTED_NUMBER_FORMAT "," + + "\"timestamp\":%llu}", + + instance->config.prefix, + (host == localhost) ? instance->config.hostname : rrdhost_hostname(host), + tags_pre, + tags, + tags_post, + instance->labels_buffer ? buffer_tostring(instance->labels_buffer) : "", + + rrdset_id(st), + rrdset_name(st), + rrdset_family(st), + rrdset_context(st), + rrdset_parts_type(st), + rrdset_units(st), + rrddim_id(rd), + rrddim_name(rd), + rd->collector.last_collected_value, + + (unsigned long long)rd->collector.last_collected_time.tv_sec); + + if (instance->config.type != EXPORTING_CONNECTOR_TYPE_JSON_HTTP) { + buffer_strcat(instance->buffer, "\n"); + } + + return 0; +} + +/** + * Format dimension using a calculated value from stored data for JSON connector + * + * @param instance an instance data structure. + * @param rd a dimension. + * @return Always returns 0. + */ +int format_dimension_stored_json_plaintext(struct instance *instance, RRDDIM *rd) +{ + RRDSET *st = rd->rrdset; + RRDHOST *host = st->rrdhost; + + time_t last_t; + NETDATA_DOUBLE value = exporting_calculate_value_from_stored_data(instance, rd, &last_t); + + if(isnan(value)) + return 0; + + const char *tags_pre = "", *tags_post = "", *tags = rrdhost_tags(host); + if (!tags) + tags = ""; + + if (*tags) { + if (*tags == '{' || *tags == '[' || *tags == '"') { + tags_pre = "\"host_tags\":"; + tags_post = ","; + } else { + tags_pre = "\"host_tags\":\""; + tags_post = "\","; + } + } + + if (instance->config.type == EXPORTING_CONNECTOR_TYPE_JSON_HTTP) { + if (buffer_strlen((BUFFER *)instance->buffer) > 2) + buffer_strcat(instance->buffer, ",\n"); + } + + buffer_sprintf( + instance->buffer, + "{" + "\"prefix\":\"%s\"," + "\"hostname\":\"%s\"," + "%s%s%s" + "%s" + + "\"chart_id\":\"%s\"," + "\"chart_name\":\"%s\"," + "\"chart_family\":\"%s\"," + "\"chart_context\": \"%s\"," + "\"chart_type\":\"%s\"," + "\"units\": \"%s\"," + + "\"id\":\"%s\"," + "\"name\":\"%s\"," + "\"value\":" NETDATA_DOUBLE_FORMAT "," + + "\"timestamp\": %llu}", + + instance->config.prefix, + (host == localhost) ? instance->config.hostname : rrdhost_hostname(host), + tags_pre, + tags, + tags_post, + instance->labels_buffer ? buffer_tostring(instance->labels_buffer) : "", + + rrdset_id(st), + rrdset_name(st), + rrdset_family(st), + rrdset_context(st), + rrdset_parts_type(st), + rrdset_units(st), + rrddim_id(rd), + rrddim_name(rd), + value, + + (unsigned long long)last_t); + + if (instance->config.type != EXPORTING_CONNECTOR_TYPE_JSON_HTTP) { + buffer_strcat(instance->buffer, "\n"); + } + + return 0; +} + +/** + * Open a JSON list for a bach + * + * @param instance an instance data structure. + * @return Always returns 0. + */ +int open_batch_json_http(struct instance *instance) +{ + buffer_strcat(instance->buffer, "[\n"); + + return 0; +} + +/** + * Close a JSON list for a bach and update buffered bytes counter + * + * @param instance an instance data structure. + * @return Always returns 0. + */ +int close_batch_json_http(struct instance *instance) +{ + buffer_strcat(instance->buffer, "\n]\n"); + + simple_connector_end_batch(instance); + + return 0; +} + +/** + * Prepare HTTP header + * + * @param instance an instance data structure. + * @return Returns 0 on success, 1 on failure. + */ +void json_http_prepare_header(struct instance *instance) +{ + struct simple_connector_data *simple_connector_data = instance->connector_specific_data; + + buffer_sprintf( + simple_connector_data->last_buffer->header, + "POST /api/put HTTP/1.1\r\n" + "Host: %s\r\n" + "%s" + "Content-Type: application/json\r\n" + "Content-Length: %lu\r\n" + "\r\n", + instance->config.destination, + simple_connector_data->auth_string ? simple_connector_data->auth_string : "", + (unsigned long int) buffer_strlen(simple_connector_data->last_buffer->buffer)); + + return; +} diff --git a/exporting/json/json.h b/exporting/json/json.h new file mode 100644 index 00000000..d916263a --- /dev/null +++ b/exporting/json/json.h @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_EXPORTING_JSON_H +#define NETDATA_EXPORTING_JSON_H + +#include "exporting/exporting_engine.h" + +int init_json_instance(struct instance *instance); +int init_json_http_instance(struct instance *instance); + +int format_host_labels_json_plaintext(struct instance *instance, RRDHOST *host); + +int format_dimension_collected_json_plaintext(struct instance *instance, RRDDIM *rd); +int format_dimension_stored_json_plaintext(struct instance *instance, RRDDIM *rd); + +int open_batch_json_http(struct instance *instance); +int close_batch_json_http(struct instance *instance); + +void json_http_prepare_header(struct instance *instance); + +#endif //NETDATA_EXPORTING_JSON_H diff --git a/exporting/json/metadata.yaml b/exporting/json/metadata.yaml new file mode 100644 index 00000000..d9f93e4a --- /dev/null +++ b/exporting/json/metadata.yaml @@ -0,0 +1,151 @@ +# yamllint disable rule:line-length +--- +id: 'export-json' +meta: + name: 'JSON' + link: 'https://learn.netdata.cloud/docs/exporting/json-document-databases' + categories: + - export + icon_filename: 'json.svg' +keywords: + - exporter + - json +overview: + exporter_description: | + Use the JSON connector for the exporting engine to archive your agent's metrics to JSON document databases for long-term storage, + further analysis, or correlation with data from other sources + exporter_limitations: '' +setup: + prerequisites: + list: + - title: '' + description: '' + configuration: + file: + name: 'exporting.conf' + options: + description: | + The following options can be defined for this exporter. + folding: + title: 'Config options' + enabled: true + list: + - name: 'enabled' + default_value: 'no' + description: 'Enables or disables an exporting connector instance (yes|no).' + required: true + - name: 'destination' + default_value: 'pubsub.googleapis.com' + description: 'Accepts a space separated list of hostnames, IPs (IPv4 and IPv6) and ports to connect to. Netdata will use the first available to send the metrics.' + required: true + detailed_description: | + The format of each item in this list, is: [PROTOCOL:]IP[:PORT]. + - PROTOCOL can be udp or tcp. tcp is the default and only supported by the current exporting engine. + - IP can be XX.XX.XX.XX (IPv4), or [XX:XX...XX:XX] (IPv6). For IPv6 you can to enclose the IP in [] to separate it from the port. + - PORT can be a number of a service name. If omitted, the default port for the exporting connector will be used. + + Example IPv4: + ```yaml + destination = localhost:5448 + ``` + When multiple servers are defined, Netdata will try the next one when the previous one fails. + - name: 'username' + default_value: 'my_username' + description: 'Username for HTTP authentication' + required: false + - name: 'password' + default_value: 'my_password' + description: 'Password for HTTP authentication' + required: false + - name: 'data source' + default_value: '' + description: 'Selects the kind of data that will be sent to the external database. (as collected|average|sum)' + required: false + - name: 'hostname' + default_value: '[global].hostname' + description: 'The hostname to be used for sending data to the external database server.' + required: false + - name: 'prefix' + default_value: 'Netdata' + description: 'The prefix to add to all metrics.' + required: false + - name: 'update every' + default_value: '10' + description: | + Frequency of sending sending data to the external database, in seconds. + required: false + detailed_description: | + Netdata will add some randomness to this number, to prevent stressing the external server when many Netdata servers + send data to the same database. This randomness does not affect the quality of the data, only the time they are sent. + - name: 'buffer on failures' + default_value: '10' + description: | + The number of iterations (`update every` seconds) to buffer data, when the external database server is not available. + required: false + detailed_description: | + If the server fails to receive the data after that many failures, data loss on the connector instance is expected (Netdata will also log it). + - name: 'timeout ms' + default_value: '2 * update_every * 1000' + description: 'The timeout in milliseconds to wait for the external database server to process the data.' + required: false + - name: 'send hosts matching' + default_value: 'localhost *' + description: | + Hosts filter. Determines which hosts will be sent to the external database. The syntax is [simple patterns](https://github.com/netdata/netdata/tree/master/libnetdata/simple_pattern#simple-patterns). + required: false + detailed_description: | + Includes one or more space separated patterns, using * as wildcard (any number of times within each pattern). + The patterns are checked against the hostname (the localhost is always checked as localhost), allowing us to + filter which hosts will be sent to the external database when this Netdata is a central Netdata aggregating multiple hosts. + + A pattern starting with `!` gives a negative match. So to match all hosts named `*db*` except hosts containing `*child*`, + use `!*child* *db*` (so, the order is important: the first pattern matching the hostname will be used - positive or negative). + - name: 'send charts matching' + default_value: '*' + description: | + One or more space separated patterns (use * as wildcard) checked against both chart id and chart name. + required: false + detailed_description: | + A pattern starting with ! gives a negative match. So to match all charts named apps.* except charts ending in *reads, + use !*reads apps.* (so, the order is important: the first pattern matching the chart id or the chart name will be used, + positive or negative). There is also a URL parameter filter that can be used while querying allmetrics. The URL parameter + has a higher priority than the configuration option. + - name: 'send names instead of ids' + default_value: '' + description: 'Controls the metric names Netdata should send to the external database (yes|no).' + required: false + detailed_description: | + Netdata supports names and IDs for charts and dimensions. Usually IDs are unique identifiers as read by the system and names + are human friendly labels (also unique). Most charts and metrics have the same ID and name, but in several cases they are + different : disks with device-mapper, interrupts, QoS classes, statsd synthetic charts, etc. + - name: 'send configured labels' + default_value: '' + description: 'Controls if host labels defined in the `[host labels]` section in `netdata.conf` should be sent to the external database (yes|no).' + required: false + - name: 'send automatic labels' + default_value: '' + description: 'Controls if automatically created labels, like `_os_name` or `_architecture` should be sent to the external database (yes|no).' + required: false + examples: + folding: + enabled: true + title: '' + list: + - name: 'Basic configuration' + folding: + enabled: false + description: '' + config: | + [json:my_json_instance] + enabled = yes + destination = localhost:5448 + - name: 'Configuration with HTTPS and HTTP authentication' + folding: + enabled: false + description: 'Add `:https` modifier to the connector type if you need to use the TLS/SSL protocol. For example: `json:https:my_json_instance`.' + config: | + [json:my_json_instance] + enabled = yes + destination = localhost:5448 + username = my_username + password = my_password |