CI: Ubuntu 26.04 with Python 3.12 is added to test

.github/workflows/ci.yml

@@ -146,6 +146,10 @@ jobs:
             python: "3"
             postgres: "17"
             case_suffix: "py3_xx_xx-pg17_xx"
+          - platform: "ubuntu_26_04"
+            python: "3.12"
+            postgres: "17"
+            case_suffix: "py3_12_xx-pg17_xx"
           - platform: "altlinux_10"
             python: "3"
             postgres: "17"

Dockerfile--ubuntu_26_04.tmpl

@@ -0,0 +1,131 @@
+ARG PG_VERSION=17
+ARG PYTHON_VERSION=3.12
+
+# --------------------------------------------- base1
+FROM ubuntu:26.04 AS base1
+ARG PG_VERSION
+
+# Disable interactive apt questions so that the build doesn't hang when setting time zones
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    sudo \
+    curl \
+    ca-certificates \
+    openssh-server \
+    sshpass \
+    time \
+    netcat-traditional \
+    iproute2 \
+    git \
+    postgresql-common \
+    libpq-dev \
+    build-essential \
+    # FIX FOR TestOsOpsCommon::test_mkdir__mt[remote_ops] \
+    #   INFO [2026-07-14 11:12:31] [Worker #3] Number 0 is reserved! \
+    #   INFO [2026-07-14 11:12:31] [Worker #0] Number 0 is reserved! \
+    # Returning classic GNU coreutils instead of the default Rust/uutils \
+    && apt-get install -y --allow-remove-essential coreutils-from-gnu coreutils-from-uutils- \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN sed -i 's/#MaxStartups 10:30:100/MaxStartups 2000:30:2000/' /etc/ssh/sshd_config && \
+    sed -i 's/#MaxSessions 10/MaxSessions 500/' /etc/ssh/sshd_config && \
+    sed -i 's/#MaxAuthTries 6/MaxAuthTries 20/' /etc/ssh/sshd_config
+
+RUN bash /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh -y
+
+RUN install -d /usr/share/postgresql-common/pgdg
+RUN curl -o /usr/share/postgresql-common/pgdg/apt.postgresql.org.asc --fail https://www.postgresql.org/media/keys/ACCC4CF8.asc
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    postgresql-${PG_VERSION}
+
+# --------------------------------------------- base2_with_python-3
+FROM base1 AS base2_with_python-3
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3 \
+    python3-dev \
+    python3-venv \
+    && rm -rf /var/lib/apt/lists/*
+
+ENV PYTHON_BINARY=python3
+
+# --------------------------------------------- base2_with_python-3.12
+FROM base1 AS base2_with_python-3.12
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    software-properties-common \
+    gnupg \
+    && add-apt-repository -y ppa:deadsnakes/ppa \
+    && apt-get update && apt-get install -y --no-install-recommends \
+    python3.12 \
+    python3.12-venv \
+    python3.12-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+ENV PYTHON_BINARY=/usr/bin/python3.12
+
+# --------------------------------------------- final
+FROM base2_with_python-${PYTHON_VERSION} AS final
+
+EXPOSE 22
+RUN ssh-keygen -A
+
+RUN useradd -m test && usermod -aG postgres test
+
+# It enables execution of "sudo service ssh start" without password
+RUN echo "test ALL=(ALL:ALL) NOPASSWD:ALL" >> /etc/sudoers
+
+COPY --chown=test:test . /home/test/testgres
+WORKDIR /home/test/testgres
+
+ENV LANG=C.UTF-8
+
+RUN chmod 700 /home/test/ && \
+    mkdir -p /home/test/.ssh && \
+    echo 'Host *' > /home/test/.ssh/config && \
+    echo '    ControlMaster auto' >> /home/test/.ssh/config && \
+    echo '    ControlPath /home/test/.ssh/master-%r@%h:%p' >> /home/test/.ssh/config && \
+    echo '    ControlPersist 30m' >> /home/test/.ssh/config && \
+    echo '    StrictHostKeyChecking no' >> /home/test/.ssh/config && \
+    echo '    UserKnownHostsFile /dev/null' >> /home/test/.ssh/config && \
+    echo '    GSSAPIAuthentication no' >> /home/test/.ssh/config && \
+    chown -R test:test /home/test/.ssh && \
+    chmod 700 /home/test/.ssh && \
+    chmod 600 /home/test/.ssh/config
+
+#
+# \"$@\"
+#   - quote is important!
+#   - "DUMMY-DUMMY-DUMMY" will be ignored. Do not ask me "why?". AXEZ.
+#
+ENTRYPOINT ["sh", "-c", " \
+    set -eux; \
+    echo 'SYSTEM START: PREPARING SSH'; \
+    service ssh start; \
+    ls -la /home/test/.ssh/; \
+    \"$@\" \
+", "DUMMY-DUMMY-DUMMY"]
+
+# Run tests by default (master machine role)
+CMD ["bash", "-c", " \
+set -eux; \
+echo \"HOME DIR IS [`realpath ~/`]\"; \
+echo \"WORK DIR IS [$(pwd)]\"; \
+if [ ! -f /home/test/.ssh/id_rsa ]; then \
+    su test -c \"ssh-keygen -t rsa -f /home/test/.ssh/id_rsa -q -N ''\"; \
+    su test -c \"cat /home/test/.ssh/id_rsa.pub >> /home/test/.ssh/authorized_keys\"; \
+    chmod 600 /home/test/.ssh/authorized_keys; \
+fi; \
+ls -la /home/test/.ssh/; \
+if [ -n \"${TEST_CFG__REMOTE_SSH_KEY:-}\" ]; then \
+    cp \"${TEST_CFG__REMOTE_SSH_KEY}\" \"${TEST_CFG__REMOTE_SSH_KEY}_ci\"; \
+    export TEST_CFG__REMOTE_SSH_KEY=\"${TEST_CFG__REMOTE_SSH_KEY}_ci\"; \
+    chown test:test \"${TEST_CFG__REMOTE_SSH_KEY}\"; \
+    chmod 600 \"${TEST_CFG__REMOTE_SSH_KEY}\"; \
+    ls -la /home/test/.ssh/; \
+fi; \
+ls -la ./; \
+su test -c \"TEST_FILTER='' bash ./run_tests.sh\"; \
+"]