create-kubernetes-binaries-iso.sh builds the ISO without setting a volume ID on EL8 based os's

Start in create-kubernetes-binaries-iso.sh and find the mkisofs command that creates the ISO. Reproduce the issue with the EL8 xorriso-compatible tooling, then verify with blkid that the generated ISO has the expected CDROM volume label and can be mounted in CloudStack.

problem

create-kubernetes-binaries-iso.sh builds the ISO without setting a volume ID on EL8 based os

versions

ACS 4.20.X
ACS 4.22.X
ACS 4.23
Management server : Oracle 8 , rocky 8

The steps to reproduce the bug

1. ISO tooling — genisoimage does not exist on EL8; xorriso provides mkisofs

sudo dnf install -y xorriso curl wget

2. containerd (for ctr) — static tarball avoids the docker-ce repo and podman conflicts

VER=1.7.24
curl -fsSL "https://github.com/containerd/containerd/releases/download/v${VER}/containerd-${VER}-linux-amd64.tar.gz" \
  | sudo tar -C /usr/local -xz
curl -fsSL -o /tmp/runc https://github.com/opencontainers/runc/releases/download/v1.2.3/runc.amd64
sudo install -m 755 /tmp/runc /usr/local/sbin/runc
curl -fsSL https://raw.githubusercontent.com/containerd/containerd/main/containerd.service \
  | sudo tee /etc/systemd/system/containerd.service >/dev/null
sudo systemctl daemon-reload && sudo systemctl enable --now containerd
sudo ln -sf /usr/local/bin/ctr /usr/bin/ctr      # sudo secure_path excludes /usr/local/bin

3. Verify

mkisofs --version && sudo ctr --version && wget --version | head -1 && curl --version | head -1

4. Execute the script

./create-kubernetes-binaries-iso.sh   /var/www/html   1.37.0 1.9.1 1.37.0   https://raw.githubusercontent.com/projectcalico/calico/v3.32.2/manifests/calico.yaml   0.45.0 setup-v1.37.0 amd64 3.7.0

5. Verify the generated iso volume label

[root@ref-trl-12298-k-Mr8-suresh-anaparti-mgmt1 util]# blkid /var/www/html/setup-v1.37.0-x86_64.iso

/var/www/html/setup-v1.37.0-x86_64.iso: BLOCK_SIZE="2048" UUID="2026-09-16-08-13-12-00" LABEL="ISOIMAGE" TYPE="iso9660"

6. If the iso is used in cloudstack , the iso doesn't get mounted

7. Change the script

sed -i 's|^mkisofs -o |mkisofs -V CDROM -o |' create-kubernetes-binaries-iso.sh

8. Run the script again and check the volume label

./create-kubernetes-binaries-iso.sh   /var/www/html   1.37.0 1.9.1 1.37.0   https://raw.githubusercontent.com/projectcalico/calico/v3.32.2/manifests/calico.yaml   0.45.0 setup-v1.37.0 amd64 3.7.0


blkid /var/www/html/setup-v1.37.0-x86_64.iso
/var/www/html/setup-v1.37.0-x86_64.iso: BLOCK_SIZE="2048" UUID="2026-09-16-08-34-56-00" LABEL="CDROM" TYPE="iso9660"

Issue is not present with ubuntu based os

┌──────────────────────┬───────────────┬───────────────────┐
│                      │ Default volid │   With -V CDROM   │
├──────────────────────┼───────────────┼───────────────────┤
│ Ubuntu (genisoimage) │ CDROM         │ CDROM — unchanged │
├──────────────────────┼───────────────┼───────────────────┤
│ OL8 (xorriso compat) │ ISOIMAGE      │ CDROM — fixed     │
└──────────────────────┴───────────────┴───────────────────┘

What to do about it?

Make the following modification to the create-kubernetes-binaries-iso.sh

sed -i 's|^mkisofs -o |mkisofs -V CDROM -o |' create-kubernetes-binaries-iso.sh