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out_prometheus_remote_write: added configurable compression method #7318

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merged 1 commit into from
May 4, 2023
Merged

out_prometheus_remote_write: added configurable compression method #7318

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41 changes: 38 additions & 3 deletions plugins/out_prometheus_remote_write/remote_write.c
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Original file line number Diff line number Diff line change
Expand Up @@ -60,9 +60,23 @@ static int http_post(struct prometheus_remote_write_context *ctx,
}

/* Map payload */
ret = flb_snappy_compress((void *) body, body_len,
(char **) &payload_buf,
&payload_size);

if (strcasecmp(ctx->compression, "snappy") == 0) {
ret = flb_snappy_compress((void *) body, body_len,
(char **) &payload_buf,
&payload_size);
}
else if (strcasecmp(ctx->compression, "gzip") == 0) {
ret = flb_gzip_compress((void *) body, body_len,
&payload_buf, &payload_size);
}
else {
payload_buf = body;
payload_size = body_len;

ret = 0;
}

if (ret != 0) {
flb_upstream_conn_release(u_conn);

Expand Down Expand Up @@ -105,6 +119,21 @@ static int http_post(struct prometheus_remote_write_context *ctx,
FLB_PROMETHEUS_REMOTE_WRITE_VERSION_LITERAL,
sizeof(FLB_PROMETHEUS_REMOTE_WRITE_VERSION_LITERAL) - 1);

if (strcasecmp(ctx->compression, "snappy") == 0) {
flb_http_add_header(c,
"Content-Encoding",
strlen("Content-Encoding"),
"snappy",
strlen("snappy"));
}
else if (strcasecmp(ctx->compression, "gzip") == 0) {
flb_http_add_header(c,
"Content-Encoding",
strlen("Content-Encoding"),
"gzip",
strlen("gzip"));
}

/* Basic Auth headers */
if (ctx->http_user && ctx->http_passwd) {
flb_http_basic_auth(c, ctx->http_user, ctx->http_passwd);
Expand Down Expand Up @@ -366,6 +395,12 @@ static struct flb_config_map config_map[] = {
0, FLB_TRUE, offsetof(struct prometheus_remote_write_context, http_passwd),
"Set HTTP auth password"
},
{
FLB_CONFIG_MAP_STR, "compression", "snappy",
0, FLB_TRUE, offsetof(struct prometheus_remote_write_context, compression),
"Compress the payload with either snappy, gzip if set"
},

#ifdef FLB_HAVE_SIGNV4
#ifdef FLB_HAVE_AWS
{
Expand Down
2 changes: 2 additions & 0 deletions plugins/out_prometheus_remote_write/remote_write.h
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,8 @@ struct prometheus_remote_write_context {
char *host;
int port;

const char *compression;

/* Log the response paylod */
int log_response_payload;

Expand Down