Operating System

Alpine Linux Releases

Q: Why is Alpine so popular for Docker containers?

Size. The alpine:3.20 base image is ~3.4MB compressed vs ~28MB for debian:slim and ~29MB for ubuntu. This means faster pulls, less storage, smaller attack surface, and faster cold starts in serverless/Kubernetes environments. Alpine uses musl libc and BusyBox instead of glibc and GNU coreutils, which is why it is so small.

Q: What are the downsides of musl libc?

musl is smaller and simpler than glibc, but some software expects glibc-specific behavior. Common issues: DNS resolution differences (musl does not support nsswitch.conf), locale handling (musl has limited locale support), and binary compatibility (precompiled binaries linked against glibc will not work on Alpine). Python wheels, Node.js native addons, and some Go binaries with CGO may need recompilation.

Q: How long is each Alpine release supported?

Each Alpine minor release gets approximately 2 years of support with security patches. Alpine releases every 6 months (May and November). This means 4 concurrent versions receive patches. Alpine does not have a formal LTS program. For long-lived containers, plan to rebuild on a new Alpine base every 12-18 months.

Q: Should I use Alpine or Debian slim for Docker?

Use Alpine if: image size is critical, you do not need glibc-dependent software, and your team is comfortable with apk (Alpine package manager). Use Debian slim if: you need glibc compatibility, wider package availability, or are running software that has known musl issues (e.g., some Java applications, Python packages with C extensions). Many teams default to Alpine and switch to Debian slim when they hit musl issues.

Q: How do I upgrade Alpine in containers?

Change the tag in your Dockerfile (FROM alpine:3.19 → alpine:3.20), rebuild, test. For running containers, do not upgrade in place. For Alpine servers/VMs, edit /etc/apk/repositories to point to the new version, then apk update && apk upgrade --available. Alpine upgrades are generally smooth because the package set is small and simple.

Q: Does Alpine support running Kubernetes?

Alpine is commonly used as a base image for K8s pods, but less commonly as a K8s node OS. For node OS, most teams use Ubuntu, Flatcar, Bottlerocket, or Talos Linux. Alpine works as a node OS but has less community tooling and documentation for K8s infrastructure compared to Ubuntu/RHEL-based distributions.

Track Alpine Linux releases, musl vs glibc context, Docker base image sizing, version support windows, and package availability comparison for container-first deployments.

Official Site Documentation

—

Total Versions

—

Supported

—

Latest

Version Timeline

All tracked releases with lifecycle status and EOL dates.

Loading version data…

Lifecycle Timeline

Visual overview of active support and maintenance windows.

3.16

3.17

3.18

3.19

3.20

3.21

3.22

2022 2023 2024 2025 2026 2027 2028 2029

Active

Maint

Active

Maint

Active

Maint

Active

Maint

Active

Maint

Active

Maint

Active

Maint

Active / LTS

Maintenance

Today

Upgrade Paths

Migration guidance between major versions — breaking changes, effort estimates, and tips.

3.17/3.18 3.20+ Low Difficulty

Est. < 30 minutes (containers: rebuild only)

Breaking Changes

musl 1.2.5 updates (minor behavior changes)
OpenSSL 3.x (from 3.18+)
Python 3.12 replaces 3.11 in repos
Package renames/splits
busybox behavior changes

Migration Notes

Alpine upgrades are the simplest of any distro. Update the repos, apk upgrade. For Docker: change the FROM tag, rebuild. The most common issue is package name changes (check apk search if something is missing). OpenSSL 3.x transition affects the same software as on Debian/Ubuntu.

Version Risk Assessment

Evaluate risk factors before choosing a version for production.

Version	EOL Risk	CVE Risk	Ecosystem	Cloud Support	Overall	Recommended Action
Alpine Linux 3.16 and older	Critical	High	Unsupported	None	Critical	Past EOL — rebuild containers on 3.20+
Alpine Linux 3.17	Critical	High	EOL	None	Critical	EOL Nov 2024 — upgrade
Alpine Linux 3.18	High	Medium	Maintenance	Partial	High	Supported until May 2025 — plan upgrade
Alpine Linux 3.19	Medium	Low	Supported	Full	Medium	Supported until Nov 2025
Alpine Linux 3.20	Low	Low	Active	Full	Low	Current — recommended
Alpine Linux 3.21	None	Low	Active	Full	Low	Latest — recommended for new containers

Alpine supports each release for ~2 years. The fast release cycle and small team mean patches stop promptly at EOL. Assessed March 2026.

Alpine Linux Version Comparison

Side-by-side feature differences across major versions.

Feature	3.17	3.18	3.19	3.20	3.21
Kernel	5.15	6.1	6.6	6.6	6.12
musl libc	1.2.3	1.2.4	1.2.4	1.2.5	1.2.5
Python	3.10	3.11	3.11	3.12	3.12
Node.js	18	18	20	20	22
Go	1.19	1.20	1.21	1.22	1.23
OpenSSL	1.1.1	3.1	3.1	3.3	3.3
GCC	12	12	13	13	14
Base image size	~3.2MB	~3.3MB	~3.4MB	~3.4MB	~3.5MB
Packages in repo	~16K	~17K	~18K	~19K	~20K

Embed Badges

Add live Alpine Linux status badges to your README, docs, or dashboard.

Health Status

Overall support health

![Alpine Linux Health Status](https://img.releaserun.com/badge/health/alpine-linux.svg)

EOL Countdown

Next end-of-life date

![Alpine Linux EOL Countdown](https://img.releaserun.com/badge/eol/alpine-linux.svg)

Latest Version

Current stable release

![Alpine Linux Latest Version](https://img.releaserun.com/badge/v/alpine-linux.svg)

CVE Status

Known vulnerabilities

![Alpine Linux CVE Status](https://img.releaserun.com/badge/cve/alpine-linux.svg)

Frequently Asked Questions

Common questions about Alpine Linux releases and lifecycle.

Why is Alpine so popular for Docker containers?

Size. The alpine:3.20 base image is ~3.4MB compressed vs ~28MB for debian:slim and ~29MB for ubuntu. This means faster pulls, less storage, smaller attack surface, and faster cold starts in serverless/Kubernetes environments. Alpine uses musl libc and BusyBox instead of glibc and GNU coreutils, which is why it is so small.

What are the downsides of musl libc?

musl is smaller and simpler than glibc, but some software expects glibc-specific behavior. Common issues: DNS resolution differences (musl does not support nsswitch.conf), locale handling (musl has limited locale support), and binary compatibility (precompiled binaries linked against glibc will not work on Alpine). Python wheels, Node.js native addons, and some Go binaries with CGO may need recompilation.

How long is each Alpine release supported?

Each Alpine minor release gets approximately 2 years of support with security patches. Alpine releases every 6 months (May and November). This means 4 concurrent versions receive patches. Alpine does not have a formal LTS program. For long-lived containers, plan to rebuild on a new Alpine base every 12-18 months.

Should I use Alpine or Debian slim for Docker?

Use Alpine if: image size is critical, you do not need glibc-dependent software, and your team is comfortable with apk (Alpine package manager). Use Debian slim if: you need glibc compatibility, wider package availability, or are running software that has known musl issues (e.g., some Java applications, Python packages with C extensions). Many teams default to Alpine and switch to Debian slim when they hit musl issues.

How do I upgrade Alpine in containers?

Change the tag in your Dockerfile (FROM alpine:3.19 → alpine:3.20), rebuild, test. For running containers, do not upgrade in place. For Alpine servers/VMs, edit /etc/apk/repositories to point to the new version, then apk update && apk upgrade --available. Alpine upgrades are generally smooth because the package set is small and simple.

Does Alpine support running Kubernetes?

Alpine is commonly used as a base image for K8s pods, but less commonly as a K8s node OS. For node OS, most teams use Ubuntu, Flatcar, Bottlerocket, or Talos Linux. Alpine works as a node OS but has less community tooling and documentation for K8s infrastructure compared to Ubuntu/RHEL-based distributions.

Related Tools

Dep EOL Scanner

Check your dependencies for end-of-life packages.

Stack Health Scorecard

Get an overall health grade for your tech stack.

Release Index

Browse all tracked platforms and their release timelines.