Add warning for linux requirements upgrade

.github/workflows/actions/prepare-distribution/action.yml

@@ -101,6 +101,12 @@ runs:
         ## Linux Requirements
         The Linux binaries target \`glibc\`: to run them or install the \`.deb\` packages you must have \`glibc\` version \`2.31+\` installed.
         Compatible systems include, but are not limited to, \`Ubuntu 20.04+\` or \`Debian 11+\` (Bullseye)).
+
+        > [!WARNING]
+        > From March 2025 onwards, released Linux binaries will have their minimum required  \`glibc\` version raised to \`2.35\`.
+        > Compatible systems include, but are not limited to, \`Ubuntu 22.04+\` or \`Debian 12+\` (Bookworm)).
+        >
+        > If you are using a system with an older version of \`glibc\`, you will need to compile the binaries from source.
         EOF
 
     - name: Fetch the latest version of the unstable tag

docs/website/blog/2025-02-04-glibc-minimum-requirement-change.md

@@ -0,0 +1,55 @@
+---
+title: Minimum required glibc version bump
+authors:
+  - name: Mithril Team
+tags: [ci, glibc, breaking-change]
+---
+
+# Upcoming Change: Minimum required glibc version bump
+
+:::info
+This only affects users who rely on the **precompiled Linux binaries** provided by the Mithril team.
+
+If you compile the binaries from source or use a different operating system, you are not affected by this change.
+:::
+
+Following [the deprecation of `Ubuntu 20.04` in GitHub Actions](https://github.com/actions/runner-images/issues/11101),
+we are updating the minimum required glibc version for our Linux binaries from `2.31` to `2.35`.
+
+## Current Situation
+
+Our Continuous Integration (CI) uses GitHub Actions to build and test the Mithril binaries for different platforms.
+
+Currently, our CI builders target `Ubuntu 20.04` to build Linux binaries, leading to a minimum required glibc version of
+`2.31`.
+This version is compatible with systems such as `Ubuntu 20.04` and `Debian 11 (Bullseye)`.
+
+However, with the release of `Ubuntu 24.04`, GitHub Actions is dropping support for `Ubuntu 20.04` as they only support
+the last two LTS versions.
+
+As a result, we need to update our CI environment to use a more recent version of Ubuntu.
+
+## Upcoming change
+
+Distribution `2506` will be the last distribution with a minimum required glibc version of `2.31`.
+
+After the release of distribution `2506`, our CI builders will be updated to use `Ubuntu 22.04`. Raising the minimum
+required glibc version for our Linux binaries to `2.35`.
+
+## Impact for users
+
+The new glibc version `2.35` is compatible with systems such as `Ubuntu 22.04` and `Debian 12 (Bookworm)`.
+
+If you are using a system with an older version of glibc, you can either:
+
+- Upgrade your system to a newer version that supports glibc `2.35` to keep using our compiled binaries.
+- Compile the binaries from source to avoid upgrading your system.
+
+## Summary
+
+- **Current minimum glibc version**: `2.31`
+  - Examples of compatible systems: `Ubuntu 20.04`, `Debian 11 (Bullseye)`
+- **New minimum glibc version**: `2.35` (effective for distributions released from **March 2025** )
+  - Examples of compatible systems: `Ubuntu 22.04`, `Debian 12 (Bookworm)`
+
+For any inquiries or assistance, don't hesitate to contact the team on the [Discord channel](https://discord.gg/5kaErDKDRq).

docs/website/root/compiled-binaries.mdx

@@ -29,3 +29,12 @@ The Linux binaries target `glibc`, and have a minimum requirement of `glibc 2.31
 or `Debian Bullseye`).
 
 :::
+
+:::warning
+
+From March 2025 onwards, released Linux binaries will have their minimum required `glibc` version raised to `2.35`
+(compatible with `Ubuntu 22.04` or `Debian 12 - Bookworm`).
+
+If you are using a system with an older version of `glibc`, you will need to compile the binaries from source.
+
+:::

docs/website/versioned_docs/version-maintained/compiled-binaries.mdx

@@ -29,3 +29,12 @@ The Linux binaries target `glibc`, and have a minimum requirement of `glibc 2.31
 or `Debian Bullseye`).
 
 :::
+
+:::warning
+
+From March 2025 onwards, released Linux binaries will have their minimum required `glibc` version raised to `2.35`
+(compatible with `Ubuntu 22.04` or `Debian 12 - Bookworm`).
+
+If you are using a system with an older version of `glibc`, you will need to compile the binaries from source.
+
+:::

mithril-install.sh

@@ -5,24 +5,46 @@ set -e
 # Function to display usage
 usage() {
   echo "Install or upgrade a Mithril node"
-  echo "Usage: $0 [-n node] [-v version] [-d distribution] [-p path]"
+  echo "Usage: $0 [-c node] [-v version] [-d distribution] [-p path]"
   echo "  -c node          : Mithril node to install or upgrade (mithril-signer, mithril-aggregator, mithril-client)"
   echo "  -d distribution  : Distribution to upgrade to (latest, unstable or distribution version e.g '2445.0')"
   echo "  -p path          : Path to install the component"
   exit 1
 }
 
-# Default values
-DISTRIBUTION="latest"
-GITHUB_ORGANIZATION="input-output-hk"
-GITHUB_REPOSITORY="mithril"
-
 # Function to display an error message and exit
 error_exit() {
   echo "$1" 1>&2
   exit 1
 }
 
+# Function to check that required tools are installed
+check_requirements() {
+    which curl >/dev/null ||
+        error_exit "It seems 'curl' is not installed or not in the path.";
+    which jq >/dev/null ||
+        error_exit "It seems 'jq' is not installed or not in the path.";
+}
+
+check_glibc_min_version() {
+  glibc_version=$(ldd --version | awk 'NR==1{print $NF}')
+
+  if [ "$(echo "$glibc_version" | grep -cE "2\.3[1-4]")" -gt 0 ]; then
+    echo "Warning: Mithril support for your GLIBC version $glibc_version is deprecated. The minimum required version will be bumped to 2.35 for distributions released from March 2025 onwards."
+  elif [ "$(echo "$glibc_version" | grep -cE -e "2\.[0-2][0-9]" -e "2\.30")" -gt 0 ]; then
+    error_exit "Error: Your GLIBC version is $glibc_version, but the minimum required version is 2.31."
+  fi
+}
+
+# --- MAIN execution ---
+
+# Default values
+DISTRIBUTION="latest"
+GITHUB_ORGANIZATION="input-output-hk"
+GITHUB_REPOSITORY="mithril"
+
+check_requirements
+
 # Parse command line arguments
 while getopts "c:v:d:p:" opt; do
   case ${opt} in
@@ -47,6 +69,7 @@ OS_CODE=$(echo "$OS" | awk '{print tolower($0)}')
 
 case "$OS" in
   Linux)
+    check_glibc_min_version
     ;;
   Darwin)
     OS_CODE="macos"