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36 changes: 18 additions & 18 deletions job.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,16 +2,16 @@ package main

import (
"context"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"fmt"
"net/url"
"os"
"regexp"
"strconv"
"strings"
"time"
"crypto/rsa"
"crypto/x509"
"encoding/pem"

_ "github.com/ClickHouse/clickhouse-go/v2" // register the ClickHouse driver
"github.com/cenkalti/backoff"
Expand Down Expand Up @@ -401,32 +401,32 @@ func (j *Job) updateConnections() {
level.Error(j.log).Log("msg", "Failed to parse Snowflake URL", "url", conn, "err", err)
continue
}

queryParams := u.Query()
privateKeyPath := os.ExpandEnv(queryParams.Get("private_key_file"))

cfg := &gosnowflake.Config{
Account: u.Host,
User: u.User.Username(),
Role: queryParams.Get("role"),
Database: queryParams.Get("database"),
Schema: queryParams.Get("schema"),
}

if privateKeyPath != "" {
// RSA key auth
keyBytes, err := os.ReadFile(privateKeyPath)
if err != nil {
level.Error(j.log).Log("msg", "Failed to read private key file", "path", privateKeyPath, "err", err)
continue
}

keyBlock, _ := pem.Decode(keyBytes)
if keyBlock == nil {
level.Error(j.log).Log("msg", "Failed to decode PEM block", "path", privateKeyPath)
continue
}

var privateKey *rsa.PrivateKey
if parsedKey, err := x509.ParsePKCS8PrivateKey(keyBlock.Bytes); err == nil {
privateKey, _ = parsedKey.(*rsa.PrivateKey)
Expand All @@ -436,16 +436,16 @@ func (j *Job) updateConnections() {
level.Error(j.log).Log("msg", "Failed to parse private key", "err", err)
continue
}

cfg.Authenticator = gosnowflake.AuthTypeJwt
cfg.PrivateKey = privateKey

dsn, err := gosnowflake.DSN(cfg)
if err != nil {
level.Error(j.log).Log("msg", "Failed to create Snowflake DSN with RSA", "err", err)
continue
}

newConn.snowflakeConfig = cfg
newConn.snowflakeDSN = dsn
newConn.host = u.Host
Expand All @@ -460,20 +460,20 @@ func (j *Job) updateConnections() {
cfg.Port = port
}
}

dsn, err := gosnowflake.DSN(cfg)
if err != nil {
level.Error(j.log).Log("msg", "Failed to create Snowflake DSN with password", "err", err)
continue
}

newConn.conn, err = sqlx.Open("snowflake", dsn)
if err != nil {
level.Error(j.log).Log("msg", "Failed to open Snowflake connection", "err", err)
continue
}
}

j.conns = append(j.conns, newConn)
continue
}
Expand Down Expand Up @@ -651,21 +651,21 @@ func (c *connection) connect(job *Job) error {
}
c.tokenExpirationTime = time.Now().Add(time.Hour)
}

db, err := sqlx.Open("snowflake", c.snowflakeDSN)
if err != nil {
return fmt.Errorf("failed to open Snowflake connection: %w (host: %s)", err, c.host)
}

db.SetMaxOpenConns(1)
db.SetMaxIdleConns(0)
db.SetConnMaxLifetime(30 * time.Minute)

if err := db.Ping(); err != nil {
db.Close()
return fmt.Errorf("failed to ping Snowflake: %w (host: %s)", err, c.host)
}

c.conn = db
return nil
}
Expand Down