containers: rm centos7 since EOL (#45049)

.github/workflows/build-containers.yml

@@ -40,7 +40,6 @@ jobs:
         # 1: Platforms to build for
         # 2: Base image (e.g. ubuntu:22.04)
         dockerfile: [[amazon-linux, 'linux/amd64,linux/arm64', 'amazonlinux:2'],
-                     [centos7, 'linux/amd64,linux/arm64,linux/ppc64le', 'centos:7'],
                      [centos-stream9, 'linux/amd64,linux/arm64,linux/ppc64le', 'centos:stream9'],
                      [leap15, 'linux/amd64,linux/arm64,linux/ppc64le', 'opensuse/leap:15'],
                      [ubuntu-focal, 'linux/amd64,linux/arm64,linux/ppc64le', 'ubuntu:20.04'],

lib/spack/docs/containers.rst

@@ -203,9 +203,6 @@ The OS that are currently supported are summarized in the table below:
    * - Ubuntu 24.04
      - ``ubuntu:24.04``
      - ``spack/ubuntu-noble``
-   * - CentOS 7
-     - ``centos:7``
-     - ``spack/centos7``
    * - CentOS Stream9
      - ``quay.io/centos/centos:stream9``
      - ``spack/centos-stream9``

lib/spack/spack/container/images.json

@@ -89,13 +89,6 @@
         "image": "quay.io/centos/centos:stream9"
       }
     },
-    "centos:7": {
-      "bootstrap": {
-        "template": "container/centos_7.dockerfile"
-      },
-      "os_package_manager": "yum",
-      "build": "spack/centos7"
-    },
     "opensuse/leap:15": {
       "bootstrap": {
         "template": "container/leap-15.dockerfile"

share/spack/templates/container/centos_7.dockerfile

@@ -1,28 +0,0 @@
-{% extends "container/bootstrap-base.dockerfile" %}
-{% block install_os_packages %}
-RUN yum update -y \
- && yum install -y epel-release \
- && yum update -y \
- && yum --enablerepo epel groupinstall -y "Development Tools" \
- && yum --enablerepo epel install -y \
-        curl \
-        findutils \
-        gcc-c++ \
-        gcc \
-        gcc-gfortran \
-        git \
-        gnupg2 \
-        hostname \
-        hg \
-        iproute \
-        make \
-        patch \
-        python3 \
-        python3-pip \
-        python3-setuptools \
-        unzip \
-        zstd \
- && pip3 install boto3 \
- && rm -rf /var/cache/yum \
- && yum clean all
-{% endblock %}