chore(deps): Update module cloud.google.com/go/cloudsqlconn to v1.21.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Confidence
cloud.google.com/go/cloudsqlconn	v1.2.3 → v1.21.0

---

Release Notes

googlecloudplatform/cloud-sql-go-connector (cloud.google.com/go/cloudsqlconn)

v1.21.0

Compare Source

Features

• upgrade example go version to match minimum (#​1087) (c950a6c)
• drop support for EOL pgxv4 driver (#​1085) (c950a6c)

v1.20.2

Compare Source

Bug Fixes

• update dependencies to latest (#​1075) (cd61b59)

Note

• Deprecate support for pgx v4. The pgx v4 library was declared end life by its maintainer as of July 2025. We will remove support for the Cloud SQL Connector in July 2026

v1.20.1

Compare Source

Bug Fixes

• bump golang.org/x/crypto in /examples/cloudrun/sqlserver (#​1046) (2191390)

v1.20.0

Compare Source

Features

• Use configured DNS name to lookup instance IP address (#​1054) (976120e), closes #​1053

v1.19.1

Compare Source

Bug Fixes

• Update dependency versions. (#​1049) (15d6f5c)

v1.19.0

Compare Source

Features

• Add support for the Metadata Exchange protocol (#​1011) (cea84c1)

Bug Fixes

• add important message to readme that show incompatibility with c… (#​1028) (6b1d73a)
• fix deps on go.mod and go.sum (#​1035) (b8d7eea)
• fix logmessage for usage with domain names (#​1006) (2832e33)
• update go and toolchain to 1.25.x (#​1036) (bd772ba)
• update renovate go contraint from 1.23 to 1.24 (#​1033) (de9d0e2)

v1.18.1

Compare Source

Bug Fixes

• Use a new context for the domain name check loop. (#​1007) (908d0cf)

v1.18.0

Compare Source

Features

• Configure the connector with Google Auth Credentials. (#​997) (594e083)

v1.17.3

Compare Source

Bug Fixes

• bump dependencies to latest (#​993) (c0e5f9c)

v1.17.2

Compare Source

Bug Fixes

• reduce the number of memory allocations and the latency overhead. (#​983) (cb641f2)

v1.17.1

Compare Source

Bug Fixes

• bump dependencies to latest (#​985) (865b93a)

v1.17.0

Compare Source

Features

• Update TLS validation to use both SAN and CN fields. (#​979) (df60a20)

v1.16.1

Compare Source

Bug Fixes

• bump dependencies to latest (#​968) (bb3c9f4)

v1.16.0

Compare Source

Features

• add domain name validation (#​925) (986152f)
• Use standard TLS hostname validation for instances with DNS names (#​954) (d733a16)

v1.15.0

Compare Source

Features

• add support for Go 1.24 and drop Go 1.22 (#​942) (e10fbd2)

Bug Fixes

• Refresh client cert when CA rotation (#​934) (c22e2d4), closes #​932

v1.14.2

Compare Source

Bug Fixes

• pass headers to transport (#​928) (08be3ab)

v1.14.1

Compare Source

Bug Fixes

• correct default usage for WithQuotaProject and WithUserAgent (#​920) (8520c3d)

v1.14.0

Compare Source

Features

• Custom SAN Support (#​911) (772fae4)
• drop support for Go 1.21 (#​906) (12c1618)
• Support server certificates from a private CA (#​899) (a8ed925)

Bug Fixes

• use auth DetectDefault over oauth2 FindDefaultCredentials (#​909) (52fef27)

v1.13.2

Compare Source

Bug Fixes

• bump dependencies to latest (#​893) (4467ed4)

v1.13.1

Compare Source

Bug Fixes

• update dependencies to latest (#​884) (dc85de5)

v1.13.0

Compare Source

Features

• Automatically reset connection when the DNS record changes. (#​868) (4d7abd8)

Bug Fixes

• update bytes_sent and bytes_received to use Sum (#​874) (73b6f38)

v1.12.1

Compare Source

Bug Fixes

• update dependencies to latest versions (#​872) (4eed622)

v1.12.0

Compare Source

Features

• add bytes_sent and bytes_received as metrics (#​856) (d0e493f)
• add support for Go 1.23 and drop Go 1.20 (#​860) (8ce98e8)
• Configure connections using DNS domain names (#​843) (ec6b3a0)
• support Cloud SQL CAS instances. (#​850) (511fae4)

v1.11.1

Compare Source

Bug Fixes

• bump dependencies to latest versions (#​839) (ce7f28f)

v1.11.0

Compare Source

Features

• generate RSA key lazily for lazy refresh (#​826) (bf293e2), closes #​823
• invalidate cache on failed IP lookup (#​812) (4b68de3), closes #​780

Bug Fixes

• ensure connection count is correctly reported (#​824) (b286049)
• invalidate cache on failed Warmup and EngineVersion (#​827) (c3915a6)

v1.10.1

Compare Source

Bug Fixes

• remove duplicate refresh operations (#​806) (beb3605), closes #​771

v1.10.0

Compare Source

Features

• expose context to debug logger (#​797) (847f7c1)

Bug Fixes

• retry 50x errors with exponential backoff (#​781) (40dc789)

v1.9.0

Compare Source

Features

• add support for a lazy refresh (#​772) (931150f), closes #​770

Bug Fixes

• return a friendly error if the dialer is closed (#​766) (d1c13e0)

v1.8.1

Compare Source

Bug Fixes

• strip monotonic clock reading in cert check (#​750) (6ae33b0), closes #​749

v1.8.0

Compare Source

Features

• add support for TPC (#​732) (b7364d9)

v1.7.0

Compare Source

Features

• add support for debug logging (#​726) (d8ca89e)
• add support for Go 1.22 (#​723) (ebe31dc)

Bug Fixes

• ensure background refresh is closed cleanly (#​715) (0b4c342)

v1.6.0

Compare Source

Features

• add connection name to public API (#​698) (84f3b6e)

v1.5.2

Compare Source

Bug Fixes

• ensure cert refresh recovers from sleep (#​686) (95671ad)

v1.5.1

Compare Source

Bug Fixes

• bump dependencies to latest (#​667) (86544f5)

v1.5.0

Compare Source

Features

• add pgx v5 support (#​639) (#​642) (8d86d92)

Bug Fixes

• use different driver names for v4 and v5 testing (#​639) (#​654) (fa73c41)
• use HandshakeContext by default (#​656) (49aad1f)

v1.4.5

Compare Source

Bug Fixes

• bump dependencies to latest (#​649) (0ddac9f)
• bump minimum supported Go version to 1.19 (#​637) (4a28a78)

v1.4.4

Compare Source

Bug Fixes

• update dependencies to latest versions (#​621) (32f1e27)

v1.4.3

Compare Source

Bug Fixes

• update ForceRefresh to block if invalid (#​605) (61c72e3)

v1.4.2

Compare Source

Bug Fixes

• re-use existing connection info on force refresh (#​602) (d049851)

v1.4.1

Compare Source

Bug Fixes

• avoid holding lock over IO (#​576) (1e4560f)

v1.4.0

Compare Source

Features

• add support for PSC connections (#​565) (10a46b0)

v1.3.0

Compare Source

Features

• add support for WithOneOffDialFunc (#​558) (14592f3)

Bug Fixes

• close background refresh for bad instances (#​550) (31f06fc)

v1.2.4

Compare Source

Bug Fixes

• update dependencies to latest versions (#​539) (f1a4008)

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun

[dpebot]

/gcbrun