Add ClickHouse output plugin

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>
This commit is contained in:
2023-06-28 16:28:35 +03:00
parent 3f9e3ff298
commit dc1277222d
6 changed files with 707 additions and 0 deletions

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README.md Normal file
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# telegraf-clickhouse-plugin
The ClickHouse output plugin saves Telegraf metric data to a ClickHouse database.
The plugin uses a simple, hard-coded database schema. There is a table for each metric type and the table name is the metric name. There is a column per field and a column per tag. There is an optional column for the metric timestamp.
A row is written for every input metric. This means multiple metrics are never merged into a single row, even if they have the same metric name, tags, and timestamp.
The plugin uses Golang's generic "database/sql" interface and third party drivers.
## Getting started
To use the plugin, set the data source name (DSN). The user account must have privileges to insert rows and create tables.
## Advanced options
When the plugin first connects it runs SQL from the init_sql setting, allowing you to perform custom initialization for the connection.
Before inserting a row, the plugin checks whether the table exists. If it doesn't exist, the plugin creates the table.
The name of the timestamp column is "timestamp" but it can be changed with the timestamp_column setting. The timestamp column can be completely disabled by setting it to "".
## Configuration
```toml @sample.conf
# Save metrics to an SQL Database
[[outputs.sql]]
## Data source name
# data_source_name = ""
## Timestamp column name
# timestamp_column = "timestamp"
## Initialization SQL
# init_sql = ""
## Maximum amount of time a connection may be idle. "0s" means connections are
## never closed due to idle time.
# connection_max_idle_time = "0s"
## Maximum amount of time a connection may be reused. "0s" means connections
## are never closed due to age.
# connection_max_lifetime = "0s"
## Maximum number of connections in the idle connection pool. 0 means unlimited.
# connection_max_idle = 2
## Maximum number of open connections to the database. 0 means unlimited.
# connection_max_open = 0
```
## Driver-specific information
### clickhouse
#### DSN
Currently, Telegraf's sql output plugin depends on [clickhouse-go v1.5.4](https://github.com/ClickHouse/clickhouse-go/tree/v1.5.4) which uses a [different DSN format](https://github.com/ClickHouse/clickhouse-go/tree/v1.5.4#dsn) than its newer `v2.*` version.

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cmd/main.go Normal file
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package main
import (
"flag"
"fmt"
"os"
"time"
_ "github.com/karaolidis/telegraf-clickhouse-plugin/plugins/outputs/clickhouse"
"github.com/influxdata/telegraf/plugins/common/shim"
)
var pollInterval = flag.Duration("poll_interval", 1*time.Second, "how often to send metrics")
var pollIntervalDisabled = flag.Bool(
"poll_interval_disabled",
false,
"set to true to disable polling. You want to use this when you are sending metrics on your own schedule",
)
var configFile = flag.String("config", "sample.conf", "path to the config file for this plugin")
var err error
// This is designed to be simple; Just change the import above, and you're good.
//
// However, if you want to do all your config in code, you can like so:
//
// // initialize your plugin with any settings you want
//
// myInput := &mypluginname.MyPlugin{
// DefaultSettingHere: 3,
// }
//
// shim := shim.New()
//
// shim.AddInput(myInput)
//
// // now the shim.Run() call as below. Note the shim is only intended to run a single plugin.
func main() {
// parse command line options
flag.Parse()
if *pollIntervalDisabled {
*pollInterval = shim.PollIntervalDisabled
}
// create the shim. This is what will run your plugins.
shimLayer := shim.New()
// If no config is specified, all imported plugins are loaded.
// otherwise, follow what the config asks for.
// Check for settings from a config toml file,
// (or just use whatever plugins were imported above)
if err = shimLayer.LoadConfig(configFile); err != nil {
fmt.Fprintf(os.Stderr, "Err loading input: %s\n", err)
os.Exit(1)
}
// run a single plugin until stdin closes, or we receive a termination signal
if err = shimLayer.Run(*pollInterval); err != nil {
fmt.Fprintf(os.Stderr, "Err: %s\n", err)
os.Exit(1)
}
}

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module github.com/karaolidis/telegraf-clickhouse-plugin
go 1.20
require (
github.com/ClickHouse/clickhouse-go v1.5.4
github.com/influxdata/telegraf v1.27.1
)
require (
github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
github.com/BurntSushi/toml v1.2.1 // indirect
github.com/Microsoft/go-winio v0.6.0 // indirect
github.com/alecthomas/participle v0.4.1 // indirect
github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20230305170008-8188dc5388df // indirect
github.com/awnumar/memcall v0.1.2 // indirect
github.com/awnumar/memguard v0.22.3 // indirect
github.com/benbjohnson/clock v1.3.3 // indirect
github.com/cenkalti/backoff/v4 v4.2.1 // indirect
github.com/cloudflare/golz4 v0.0.0-20150217214814-ef862a3cdc58 // indirect
github.com/compose-spec/compose-go v1.15.0 // indirect
github.com/containerd/containerd v1.6.18 // indirect
github.com/coreos/go-semver v0.3.1 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/docker/distribution v2.8.2+incompatible // indirect
github.com/docker/docker v23.0.4+incompatible // indirect
github.com/docker/go-connections v0.4.0 // indirect
github.com/docker/go-units v0.5.0 // indirect
github.com/fatih/color v1.15.0 // indirect
github.com/gobwas/glob v0.2.3 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/golang/protobuf v1.5.3 // indirect
github.com/google/cel-go v0.14.1-0.20230424164844-d39523c445fc // indirect
github.com/google/go-cmp v0.5.9 // indirect
github.com/google/uuid v1.3.0 // indirect
github.com/gosnmp/gosnmp v1.35.0 // indirect
github.com/influxdata/toml v0.0.0-20190415235208-270119a8ce65 // indirect
github.com/klauspost/compress v1.16.5 // indirect
github.com/klauspost/pgzip v1.2.6 // indirect
github.com/magiconair/properties v1.8.7 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-isatty v0.0.19 // indirect
github.com/moby/patternmatcher v0.5.0 // indirect
github.com/moby/sys/sequential v0.5.0 // indirect
github.com/moby/term v0.0.0-20221128092401-c43b287e0e0f // indirect
github.com/morikuni/aec v1.0.0 // indirect
github.com/naoina/go-stringutil v0.1.0 // indirect
github.com/opencontainers/go-digest v1.0.0 // indirect
github.com/opencontainers/image-spec v1.1.0-rc2 // indirect
github.com/opencontainers/runc v1.1.5 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/sirupsen/logrus v1.9.0 // indirect
github.com/sleepinggenius2/gosmi v0.4.4 // indirect
github.com/stoewer/go-strcase v1.2.0 // indirect
github.com/stretchr/testify v1.8.4 // indirect
github.com/testcontainers/testcontainers-go v0.18.0 // indirect
github.com/youmark/pkcs8 v0.0.0-20201027041543-1326539a0a0a // indirect
golang.org/x/crypto v0.9.0 // indirect
golang.org/x/exp v0.0.0-20230522175609-2e198f4a06a1 // indirect
golang.org/x/mod v0.10.0 // indirect
golang.org/x/net v0.10.0 // indirect
golang.org/x/sys v0.9.0 // indirect
golang.org/x/text v0.9.0 // indirect
golang.org/x/tools v0.8.0 // indirect
google.golang.org/genproto/googleapis/api v0.0.0-20230530153820-e85fd2cbaebc // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc // indirect
google.golang.org/grpc v1.55.0 // indirect
google.golang.org/protobuf v1.30.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

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go.sum Normal file
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github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/toml v1.2.1 h1:9F2/+DoOYIOksmaJFPw1tGFy1eDnIJXg+UHjuD8lTak=
github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
github.com/ClickHouse/clickhouse-go v1.5.4 h1:cKjXeYLNWVJIx2J1K6H2CqyRmfwVJVY1OV1coaaFcI0=
github.com/ClickHouse/clickhouse-go v1.5.4/go.mod h1:EaI/sW7Azgz9UATzd5ZdZHRUhHgv5+JMS9NSr2smCJI=
github.com/Microsoft/go-winio v0.6.0 h1:slsWYD/zyx7lCXoZVlvQrj0hPTM1HI4+v1sIda2yDvg=
github.com/Microsoft/go-winio v0.6.0/go.mod h1:cTAf44im0RAYeL23bpB+fzCyDH2MJiz2BO69KH/soAE=
github.com/alecthomas/go-thrift v0.0.0-20170109061633-7914173639b2/go.mod h1:CxCgO+NdpMdi9SsTlGbc0W+/UNxO3I0AabOEJZ3w61w=
github.com/alecthomas/kong v0.2.1/go.mod h1:+inYUSluD+p4L8KdviBSgzcqEjUQOfC5fQDRFuc36lI=
github.com/alecthomas/participle v0.4.1 h1:P2PJWzwrSpuCWXKnzqvw0b0phSfH1kJo4p2HvLynVsI=
github.com/alecthomas/participle v0.4.1/go.mod h1:T8u4bQOSMwrkTWOSyt8/jSFPEnRtd0FKFMjVfYBlqPs=
github.com/alecthomas/repr v0.0.0-20181024024818-d37bc2a10ba1/go.mod h1:xTS7Pm1pD1mvyM075QCDSRqH6qRLXylzS24ZTpRiSzQ=
github.com/alecthomas/repr v0.0.0-20210301060118-828286944d6a/go.mod h1:2kn6fqh/zIyPLmm3ugklbEi5hg5wS435eygvNfaDQL8=
github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 h1:s6gZFSlWYmbqAuRjVTiNNhvNRfY2Wxp9nhfyel4rklc=
github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137/go.mod h1:OMCwj8VM1Kc9e19TLln2VL61YJF0x1XFtfdL4JdbSyE=
github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20230305170008-8188dc5388df h1:7RFfzj4SSt6nnvCPbCqijJi1nWCd+TqAT3bYCStRC18=
github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20230305170008-8188dc5388df/go.mod h1:pSwJ0fSY5KhvocuWSx4fz3BA8OrA1bQn+K1Eli3BRwM=
github.com/awnumar/memcall v0.1.2 h1:7gOfDTL+BJ6nnbtAp9+HQzUFjtP1hEseRQq8eP055QY=
github.com/awnumar/memcall v0.1.2/go.mod h1:S911igBPR9CThzd/hYQQmTc9SWNu3ZHIlCGaWsWsoJo=
github.com/awnumar/memguard v0.22.3 h1:b4sgUXtbUjhrGELPbuC62wU+BsPQy+8lkWed9Z+pj0Y=
github.com/awnumar/memguard v0.22.3/go.mod h1:mmGunnffnLHlxE5rRgQc3j+uwPZ27eYb61ccr8Clz2Y=
github.com/benbjohnson/clock v1.3.3 h1:g+rSsSaAzhHJYcIQE78hJ3AhyjjtQvleKDjlhdBnIhc=
github.com/benbjohnson/clock v1.3.3/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
github.com/bkaradzic/go-lz4 v1.0.0/go.mod h1:0YdlkowM3VswSROI7qDxhRvJ3sLhlFrRRwjwegp5jy4=
github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4=
github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
github.com/checkpoint-restore/go-criu/v5 v5.3.0/go.mod h1:E/eQpaFtUKGOOSEBZgmKAcn+zUUwWxqcaKZlF54wK8E=
github.com/cilium/ebpf v0.7.0/go.mod h1:/oI2+1shJiTGAMgl6/RgJr36Eo1jzrRcAWbcXO2usCA=
github.com/cloudflare/golz4 v0.0.0-20150217214814-ef862a3cdc58 h1:F1EaeKL/ta07PY/k9Os/UFtwERei2/XzGemhpGnBKNg=
github.com/cloudflare/golz4 v0.0.0-20150217214814-ef862a3cdc58/go.mod h1:EOBUe0h4xcZ5GoxqC5SDxFQ8gwyZPKQoEzownBlhI80=
github.com/compose-spec/compose-go v1.15.0 h1:rv3TTgbS3U4Y8sRTngrcxDmpbz+fq26wTqHculSCi6s=
github.com/compose-spec/compose-go v1.15.0/go.mod h1:3yngGBGfls6FHGQsg4B1z6gz8ej9SOvmAJtxCwgbcnc=
github.com/containerd/console v1.0.3/go.mod h1:7LqA/THxQ86k76b8c/EMSiaJ3h1eZkMkXar0TQ1gf3U=
github.com/containerd/containerd v1.6.18 h1:qZbsLvmyu+Vlty0/Ex5xc0z2YtKpIsb5n45mAMI+2Ns=
github.com/containerd/containerd v1.6.18/go.mod h1:1RdCUu95+gc2v9t3IL+zIlpClSmew7/0YS8O5eQZrOw=
github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=
github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
github.com/cyphar/filepath-securejoin v0.2.3/go.mod h1:aPGpWjXOXUn2NCNjFvBE6aRxGGx79pTxQpKOJNYHHl4=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/docker/distribution v2.8.2+incompatible h1:T3de5rq0dB1j30rp0sA2rER+m322EBzniBPB6ZIzuh8=
github.com/docker/distribution v2.8.2+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
github.com/docker/docker v23.0.4+incompatible h1:Kd3Bh9V/rO+XpTP/BLqM+gx8z7+Yb0AA2Ibj+nNo4ek=
github.com/docker/docker v23.0.4+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
github.com/fatih/color v1.15.0 h1:kOqh6YHBtK8aywxGerMG2Eq3H6Qgoqeo13Bk2Mv/nBs=
github.com/fatih/color v1.15.0/go.mod h1:0h5ZqXfHYED7Bhv2ZJamyIOUej9KtShiJESRwBDUSsw=
github.com/frankban/quicktest v1.11.3/go.mod h1:wRf/ReqHper53s+kmmSZizM8NamnL3IM0I9ntUbOk+k=
github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/godbus/dbus/v5 v5.0.6/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
github.com/google/cel-go v0.14.1-0.20230424164844-d39523c445fc h1:jd+stC3Fqf9kaqgCLOdm4Da/AN3txPTlmLB6tStXAcU=
github.com/google/cel-go v0.14.1-0.20230424164844-d39523c445fc/go.mod h1:YzWEoI07MC/a/wj9in8GeVatqfypkldgBlwXh9bCwqY=
github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/gosnmp/gosnmp v1.35.0 h1:EuWWNPxTCdAUx2/NbQcSa3WdNxjzpy4Phv57b4MWpJM=
github.com/gosnmp/gosnmp v1.35.0/go.mod h1:2AvKZ3n9aEl5TJEo/fFmf/FGO4Nj4cVeEc5yuk88CYc=
github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
github.com/influxdata/telegraf v1.27.1 h1:H0GO34YaRFoupJmD8/v9ImvCHRYYIQlaQPeVC/sVT2A=
github.com/influxdata/telegraf v1.27.1/go.mod h1:keCAT+VIMvDB2mTTptf4ijjvgdeMw0UsXcnctsxO2b8=
github.com/influxdata/toml v0.0.0-20190415235208-270119a8ce65 h1:vvyMtD5LTJc1W9sQKjDkAWdcg0478CszSdzlHtiAXCY=
github.com/influxdata/toml v0.0.0-20190415235208-270119a8ce65/go.mod h1:zApaNFpP/bTpQItGZNNUMISDMDAnTXu9UqJ4yT3ocz8=
github.com/jmoiron/sqlx v1.2.0/go.mod h1:1FEQNm3xlJgrMD+FBdI9+xvCksHtbpVBBw5dYhBSsks=
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
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golang.org/x/sys v0.0.0-20211116061358-0a5406a5449c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/sys v0.9.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
golang.org/x/tools v0.8.0 h1:vSDcovVPld282ceKgDimkRSC8kpaH1dgyc9UMzlt84Y=
golang.org/x/tools v0.8.0/go.mod h1:JxBZ99ISMI5ViVkT1tr6tdNmXeTrcpVSD3vZ1RsRdN4=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/genproto v0.0.0-20230530153820-e85fd2cbaebc h1:8DyZCyvI8mE1IdLy/60bS+52xfymkE72wv1asokgtao=
google.golang.org/genproto/googleapis/api v0.0.0-20230530153820-e85fd2cbaebc h1:kVKPf/IiYSBWEWtkIn6wZXwWGCnLKcC8oWfZvXjsGnM=
google.golang.org/genproto/googleapis/api v0.0.0-20230530153820-e85fd2cbaebc/go.mod h1:vHYtlOoi6TsQ3Uk2yxR7NI5z8uoV+3pZtR4jmHIkRig=
google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc h1:XSJ8Vk1SWuNr8S18z1NZSziL0CPIXLCCMDOEFtHBOFc=
google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc/go.mod h1:66JfowdXAEgad5O9NnYcsNPLCPZJD++2L9X0PCMODrA=
google.golang.org/grpc v1.55.0 h1:3Oj82/tFSCeUrRTg/5E/7d/W5A1tj6Ky1ABAuZuv5ag=
google.golang.org/grpc v1.55.0/go.mod h1:iYEXKGkEBhg1PjZQvoYEVPTDkHo1/bjTnfwTeGONTY8=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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@@ -0,0 +1,256 @@
//go:generate ../../../tools/readme_config_includer/generator
package sql
import (
gosql "database/sql"
_ "embed"
"fmt"
"strings"
"time"
_ "github.com/ClickHouse/clickhouse-go"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/config"
"github.com/influxdata/telegraf/plugins/outputs"
)
//go:embed sample.conf
var sampleConfig string
type SQL struct {
DataSourceName string
TimestampColumn string
InitSQL string `toml:"init_sql"`
ConnectionMaxIdleTime config.Duration
ConnectionMaxLifetime config.Duration
ConnectionMaxIdle int
ConnectionMaxOpen int
db *gosql.DB
Log telegraf.Logger `toml:"-"`
}
func (*SQL) SampleConfig() string {
return sampleConfig
}
func (p *SQL) Connect() error {
db, err := gosql.Open("clickhouse", p.DataSourceName)
if err != nil {
return err
}
err = db.Ping()
if err != nil {
return err
}
db.SetConnMaxIdleTime(time.Duration(p.ConnectionMaxIdleTime))
db.SetConnMaxLifetime(time.Duration(p.ConnectionMaxLifetime))
db.SetMaxIdleConns(p.ConnectionMaxIdle)
db.SetMaxOpenConns(p.ConnectionMaxOpen)
if p.InitSQL != "" {
_, err = db.Exec(p.InitSQL)
if err != nil {
return err
}
}
p.db = db
return nil
}
func (p *SQL) Close() error {
return p.db.Close()
}
func quoteIdent(name string) string {
return `"` + strings.ReplaceAll(sanitizeQuoted(name), `"`, `""`) + `"`
}
func sanitizeQuoted(in string) string {
// https://dev.mysql.com/doc/refman/8.0/en/identifiers.html
// https://www.postgresql.org/docs/13/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS
// Whitelist allowed characters
return strings.Map(func(r rune) rune {
switch {
case r >= '\u0001' && r <= '\uFFFF':
return r
default:
return '_'
}
}, in)
}
func (p *SQL) deriveDatatype(value interface{}) string {
var datatype string
switch value.(type) {
case int64:
datatype = "Int64"
case uint64:
datatype = "UInt64"
case float64:
datatype = "Float64"
case string:
datatype = "String"
case bool:
datatype = "UInt8"
default:
datatype = "String"
}
return datatype
}
func (p *SQL) generateCreateTable(tablename string, columns map[string]struct{}) string {
columnDefs := make([]string, 0, len(columns))
for column := range columns {
dataType := p.deriveDatatype(column)
columnDefs = append(columnDefs, fmt.Sprintf("%s %s", quoteIdent(column), dataType))
}
return fmt.Sprintf("CREATE TABLE IF NOT EXISTS %s (%s)",
quoteIdent(tablename),
strings.Join(columnDefs, ","))
}
func (p *SQL) generateAlterTable(tablename string, columns map[string]struct{}) string {
alterDefs := make([]string, 0, len(columns))
for column := range columns {
dataType := p.deriveDatatype(column)
alterDefs = append(alterDefs, fmt.Sprintf("ADD COLUMN IF NOT EXISTS %s %s",
quoteIdent(column), dataType))
}
return fmt.Sprintf("ALTER TABLE %s %s",
quoteIdent(tablename),
strings.Join(alterDefs, ","))
}
func (p *SQL) generateInsert(tablename string, columns map[string]struct{}, batchSize int) string {
quotedColumns := make([]string, 0, len(columns))
for column := range columns {
quotedColumns = append(quotedColumns, quoteIdent(column))
}
placeholder := "(" + strings.Repeat("?,", len(columns)-1) + "?)"
placeholders := strings.Repeat(placeholder+",", batchSize-1) + placeholder
return fmt.Sprintf("INSERT INTO %s(%s) VALUES %s",
quoteIdent(tablename),
strings.Join(quotedColumns, ","),
placeholders)
}
func (p *SQL) isUnknownTableErr(err error) bool {
if err == nil {
return false
}
return strings.Contains(err.Error(), "UNKNOWN_TABLE")
}
func (p *SQL) isNoSuchColumnInTableErr(err error) bool {
if err == nil {
return false
}
return strings.Contains(err.Error(), "NO_SUCH_COLUMN_IN_TABLE")
}
func (p *SQL) Write(metrics []telegraf.Metric) error {
metricsByTable := make(map[string][]telegraf.Metric)
tableLengths := make(map[string]int)
tableColumns := make(map[string]map[string]struct{})
for _, metric := range metrics {
tablename := metric.Name()
metricsByTable[tablename] = append(metricsByTable[tablename], metric)
tableLengths[tablename]++
for _, tag := range metric.TagList() {
if _, ok := tableColumns[tablename]; !ok {
tableColumns[tablename] = make(map[string]struct{})
}
tableColumns[tablename][tag.Key] = struct{}{}
}
for _, field := range metric.FieldList() {
if _, ok := tableColumns[tablename]; !ok {
tableColumns[tablename] = make(map[string]struct{})
}
tableColumns[tablename][field.Key] = struct{}{}
}
}
for tablename, tableMetrics := range metricsByTable {
for {
sql := p.generateInsert(tablename, tableColumns[tablename], tableLengths[tablename])
values := make([]interface{}, 0, len(tableMetrics)*len(tableColumns[tablename]))
tx, err := p.db.Begin()
if err != nil {
return fmt.Errorf("begin failed: %w", err)
}
stmt, err := tx.Prepare(sql)
if err != nil {
return fmt.Errorf("prepare failed: %w", err)
}
defer stmt.Close()
_, err = stmt.Exec(values...)
if err != nil {
if p.isUnknownTableErr(err) {
createTableStmt := p.generateCreateTable(tablename, tableColumns[tablename])
_, err = p.db.Exec(createTableStmt)
if err != nil {
return fmt.Errorf("create table failed: %w", err)
}
continue
}
if p.isNoSuchColumnInTableErr(err) {
alterTableStmt := p.generateAlterTable(tablename, tableColumns[tablename])
_, err = p.db.Exec(alterTableStmt)
if err != nil {
return fmt.Errorf("alter table failed: %w", err)
}
continue
}
return fmt.Errorf("execution failed: %w", err)
}
err = tx.Commit()
if err != nil {
return fmt.Errorf("commit failed: %w", err)
}
break
}
}
return nil
}
func init() {
outputs.Add("sql", func() telegraf.Output { return newSQL() })
}
func newSQL() *SQL {
return &SQL{
TimestampColumn: "timestamp",
// Defaults for the connection settings (ConnectionMaxIdleTime,
// ConnectionMaxLifetime, ConnectionMaxIdle, and ConnectionMaxOpen)
// mirror the golang defaults. As of go 1.18 all of them default to 0
// except max idle connections which is 2. See
// https://pkg.go.dev/database/sql#DB.SetMaxIdleConns
ConnectionMaxIdle: 2,
}
}

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@@ -0,0 +1,24 @@
# Save metrics to an SQL Database
[[outputs.sql]]
## Data source name
# data_source_name = ""
## Timestamp column name
# timestamp_column = "timestamp"
## Initialization SQL
# init_sql = ""
## Maximum amount of time a connection may be idle. "0s" means connections are
## never closed due to idle time.
# connection_max_idle_time = "0s"
## Maximum amount of time a connection may be reused. "0s" means connections
## are never closed due to age.
# connection_max_lifetime = "0s"
## Maximum number of connections in the idle connection pool. 0 means unlimited.
# connection_max_idle = 2
## Maximum number of open connections to the database. 0 means unlimited.
# connection_max_open = 0