From b5adb70a48afbfbd71a846d1364ccd1484411609 Mon Sep 17 00:00:00 2001 From: Leonardo Arena Date: Wed, 25 Mar 2026 20:08:30 +0100 Subject: [PATCH] Allow to override default IMDS endpoint --- README.md | 15 +++++++++++++++ bin/imds | 3 ++- lib/tiny-cloud/tiny-cloud.conf | 5 +++++ 3 files changed, 22 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 3ca948b..0e4e268 100644 --- a/README.md +++ b/README.md @@ -105,6 +105,21 @@ Alternatively, you can add `tinycloud=cloud=` (preferred) or `ds=` `/sys/class/dmi/id/product_serial` (QEMU hack) is another way to explicitly choose a cloud provider. +### Custom Metadata Service Endpoint + +For custom or non-standard metadata services, you can +override the default IMDS endpoint by setting `IMDS_ENDPOINT` in +`/etc/tiny-cloud.conf`: + +```sh +# For Tinkerbell or other custom metadata services +IMDS_ENDPOINT=192.0.2.1:50061 +``` + +The default endpoint is `169.254.169.254` for most cloud providers. This +setting allows you to specify a custom IP address and optional port for the +metadata service. + ## Operation The first time an instance boots -- either freshly instantiated from an image, diff --git a/bin/imds b/bin/imds index 6ccce6b..575ac53 100755 --- a/bin/imds +++ b/bin/imds @@ -52,7 +52,8 @@ unset -f \ ### default variables/functions # Common to many clouds -IMDS_ENDPOINT="169.254.169.254" +# Can be overridden in /etc/tiny-cloud.conf +: "${IMDS_ENDPOINT:=169.254.169.254}" # Common to AWS and NoCloud(ish) IMDS_HOSTNAME="meta-data/hostname" diff --git a/lib/tiny-cloud/tiny-cloud.conf b/lib/tiny-cloud/tiny-cloud.conf index 599c6d5..7100c49 100644 --- a/lib/tiny-cloud/tiny-cloud.conf +++ b/lib/tiny-cloud/tiny-cloud.conf @@ -8,6 +8,11 @@ # User account where instance SSH keys are installed #CLOUD_USER=alpine +# IMDS endpoint override (IP:PORT or IP) +# Defaults to 169.254.169.254 for most clouds +# Useful for custom metadata services +#IMDS_ENDPOINT=169.254.169.254 + # IMDS token validity, in seconds (AWS only) #IMDS_TOKEN_TTL=5