diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6c89118c..703c8722 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -74,75 +74,104 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - platform: "std2-all"
+          - platform: "alpine"
             python: "3.7"
             postgres: "17"
-          - platform: "std2-all"
+            case_suffix: "py3_07_xx-pg17_xx"
+          - platform: "alpine"
             python: "3.8.0"
             postgres: "17"
-          - platform: "std2-all"
+            case_suffix: "py3_08_88-pg17_xx"
+          - platform: "alpine"
             python: "3.8"
             postgres: "17"
-          - platform: "std2-all"
+            case_suffix: "py3_08_xx-pg17_xx"
+          - platform: "alpine"
             python: "3.9"
             postgres: "17"
-          - platform: "std2-all"
+            case_suffix: "py3_09_xx-pg17_xx"
+          - platform: "alpine"
             python: "3.10"
             postgres: "17"
-          - platform: "std2-all"
+            case_suffix: "py3_10_xx-pg17_xx"
+          - platform: "alpine"
             python: "3.11"
             postgres: "17"
-          - platform: "std2-all"
+            case_suffix: "py3_11_xx-pg17_xx"
+          - platform: "alpine"
             python: "3.12"
             postgres: "17"
-          - platform: "std2-all"
+            case_suffix: "py3_12_xx-pg17_xx"
+          - platform: "alpine"
             python: "3.13"
             postgres: "17"
-          - platform: "std2-all"
+            case_suffix: "py3_13_xx-pg17_xx"
+          - platform: "alpine"
             python: "3.14"
             postgres: "17"
-          - platform: "std"
-            python: "3"
+            case_suffix: "py3_14_xx-pg17_xx"
+          - platform: "alpine"
+            python: "3.12"
             postgres: "10"
-          - platform: "std"
-            python: "3"
+            case_suffix: "py3_12_xx-pg10_xx"
+          - platform: "alpine"
+            python: "3.12"
             postgres: "11"
-          - platform: "std"
-            python: "3"
+            case_suffix: "py3_12_xx-pg11_xx"
+          - platform: "alpine"
+            python: "3.12"
             postgres: "12"
-          - platform: "std"
-            python: "3"
+            case_suffix: "py3_12_xx-pg12_xx"
+          - platform: "alpine"
+            python: "3.12"
             postgres: "13"
-          - platform: "std"
-            python: "3"
+            case_suffix: "py3_12_xx-pg13_xx"
+          - platform: "alpine"
+            python: "3.12"
             postgres: "14"
-          - platform: "std"
-            python: "3"
+            case_suffix: "py3_12_xx-pg14_xx"
+          - platform: "alpine"
+            python: "3.12"
             postgres: "15"
-          - platform: "std"
-            python: "3"
+            case_suffix: "py3_12_xx-pg15_xx"
+          - platform: "alpine"
+            python: "3.12"
             postgres: "16"
-          - platform: "std-all"
-            python: "3"
-            postgres: "17"
-          - platform: "std-all"
-            python: "3"
+            case_suffix: "py3_12_xx-pg16_xx"
+          - platform: "alpine"
+            python: "3.12"
             postgres: "18"
+            case_suffix: "py3_12_xx-pg18_xx"
           - platform: "ubuntu_24_04"
             python: "3"
             postgres: "17"
+            case_suffix: "py3_xx_xx-pg17_xx"
           - platform: "altlinux_10"
             python: "3"
             postgres: "17"
+            case_suffix: "py3_xx_xx-pg17_xx"
           - platform: "altlinux_11"
             python: "3"
             postgres: "17"
+            case_suffix: "py3_xx_xx-pg17_xx"
           - platform: "astralinux_1_7"
             python: "3"
             postgres: "17"
+            case_suffix: "py3_xx_xx-pg17_xx"
+
+    name: "test: ${{ matrix.platform }} | ${{ matrix.case_suffix }}"
 
     env:
-      BASE_SIGN: "${{ matrix.platform }}-py${{ matrix.python }}-pg${{ matrix.postgres }}"
+      BASE_SIGN: "${{ matrix.platform }}-${{ matrix.case_suffix }}"
+
+      DOCKER_HIGHLOAD_FLAGS: >-
+        --init
+        --sysctl net.core.somaxconn=4096
+        --sysctl net.ipv4.tcp_max_syn_backlog=4096
+        --ulimit nofile=524288:524288
+        --ulimit nproc=65535:65535
+        --sysctl net.ipv4.tcp_tw_reuse=1
+        --sysctl net.ipv4.ip_local_port_range="1024 65535"
 
     steps:
     - name: Prepare variables
@@ -150,6 +179,10 @@ jobs:
         echo "RUN_CFG__NOW=$(date +'%Y%m%d_%H%M%S')" >> $GITHUB_ENV
         echo "RUN_CFG__LOGS_DIR=logs-${{ env.BASE_SIGN }}" >> $GITHUB_ENV
         echo "RUN_CFG__DOCKER_IMAGE_NAME=tests-${{ env.BASE_SIGN }}" >> $GITHUB_ENV
+        echo "RUN_CFG__NETWORK_NAME=network-${{ env.BASE_SIGN }}" >> $GITHUB_ENV
+        echo "RUN_CFG__MACHINE1_NAME=machine1-${{ env.BASE_SIGN }}" >> $GITHUB_ENV
+        echo "RUN_CFG__MACHINE2_NAME=machine2-${{ env.BASE_SIGN }}" >> $GITHUB_ENV
+        echo "RUN_CFG__SSH_KEY_NAME=id_ed25519-${{ env.BASE_SIGN }}" >> $GITHUB_ENV
         echo "---------- [$GITHUB_ENV]"
         cat $GITHUB_ENV
     - name: Checkout
@@ -158,10 +191,83 @@ jobs:
       run: mkdir -p "${{ env.RUN_CFG__LOGS_DIR }}"
     - name: Adjust logs folder permission
       run: chmod -R 777 "${{ env.RUN_CFG__LOGS_DIR }}"
-    - name: Build local image ${{ matrix.alpine }}
+    - name: Build local image
       run: docker build --build-arg PG_VERSION="${{ matrix.postgres }}" --build-arg PYTHON_VERSION="${{ matrix.python }}" -t "${{ env.RUN_CFG__DOCKER_IMAGE_NAME }}" -f Dockerfile--${{ matrix.platform }}.tmpl .
-    - name: Run
-      run: docker run $(bash <(curl -s https://codecov.io/env)) -t -v ${{ github.workspace }}/${{ env.RUN_CFG__LOGS_DIR }}:/home/test/testgres/logs "${{ env.RUN_CFG__DOCKER_IMAGE_NAME }}"
+    - name: Generate temporary SSH Key pair for CI
+      run: |
+        # Generate a key without a password directly on the GitHub Actions host
+        ssh-keygen -q -t ed25519 -N "" -f ${{ github.workspace }}/${{ env.RUN_CFG__SSH_KEY_NAME }}
+
+    - name: Setup network
+      run: |
+        docker network create ${{ env.RUN_CFG__NETWORK_NAME }}
+
+    - name: Run machine2 (for remote operations)
+      run: |
+        #
+        # "- sleep infinity" is a right command. Docker ignores "-" and runs "sleep infinity".
+        #
+        docker run -d -t \
+          ${{ env.DOCKER_HIGHLOAD_FLAGS }} \
+          --sysctl net.ipv4.tcp_tw_reuse=1 \
+          --sysctl net.ipv4.ip_local_port_range="1024 65535" \
+          --network ${{ env.RUN_CFG__NETWORK_NAME }} \
+          --name ${{ env.RUN_CFG__MACHINE2_NAME }} \
+          "${{ env.RUN_CFG__DOCKER_IMAGE_NAME }}" \
+          sleep infinity
+
+        echo "Waiting for container ${{ env.RUN_CFG__MACHINE2_NAME }} to start ..."
+        
+        # Set the timeout using the attempt counter
+        MAX_ATTEMPTS=50
+        ATTEMPT=0
+        
+        until [ "$(docker container inspect --format '{{.State.Running}}' "${{ env.RUN_CFG__MACHINE2_NAME }}")" = "true" ]; do
+          ATTEMPT=$((ATTEMPT + 1))
+          if [ $ATTEMPT -ge $MAX_ATTEMPTS ]; then
+            echo "Error: Container did not start within the allotted time (timeout)!"
+            exit 1
+          fi
+          sleep 0.2
+        done
+        
+        echo "Container successfully launched in $((ATTEMPT * 2 / 10)) second(s)!"
+
+        #
+        # Setup authorized_keys
+        #
+        cat ${{ github.workspace }}/${{ env.RUN_CFG__SSH_KEY_NAME }}.pub | \
+        docker exec -i -u test ${{ env.RUN_CFG__MACHINE2_NAME }} sh -c " \
+          cat >> /home/test/.ssh/authorized_keys && \
+          chmod 600 /home/test/.ssh/authorized_keys \
+        "
+
+        #
+        # Log status
+        #
+        docker exec -u root ${{ env.RUN_CFG__MACHINE2_NAME }} sh -c "
+          echo '--- INSIDE CONTAINER OS ---' && \
+          cat /etc/os-release && \
+          echo '--- INSIDE CONTAINER .SSH ---' && \
+          ls -la /home/test/.ssh/ \
+        "
+
+    - name: Run machine1 (main test container)
+      run: |
+        # Launch the main container, passing the private key to the .ssh folder of the test user.
+        # Pass environment variables so Python tests know where to start.
+        # Added the --rm flag so that the container is automatically deleted after the tests are completed
+        docker run --rm -t \
+          ${{ env.DOCKER_HIGHLOAD_FLAGS }} \
+          --network ${{ env.RUN_CFG__NETWORK_NAME }} \
+          --name ${{ env.RUN_CFG__MACHINE1_NAME }} \
+          -v ${{ github.workspace }}/${{ env.RUN_CFG__LOGS_DIR }}:/home/test/testgres/logs \
+          -v ${{ github.workspace }}/${{ env.RUN_CFG__SSH_KEY_NAME }}:/home/test/testgres/id_ed25519_test:ro \
+          -e TEST_CFG__REMOTE_HOST="${{ env.RUN_CFG__MACHINE2_NAME }}" \
+          -e TEST_CFG__REMOTE_PORT="22" \
+          -e TEST_CFG__REMOTE_USERNAME="test" \
+          -e TEST_CFG__REMOTE_SSH_KEY="/home/test/testgres/id_ed25519_test" \
+          "${{ env.RUN_CFG__DOCKER_IMAGE_NAME }}"
     - name: Upload Logs
       uses: actions/upload-artifact@v7
       if: always() # IT IS IMPORTANT!
diff --git a/Dockerfile--alpine.tmpl b/Dockerfile--alpine.tmpl
new file mode 100644
index 00000000..1cc1f6a2
--- /dev/null
+++ b/Dockerfile--alpine.tmpl
@@ -0,0 +1,148 @@
+ARG PG_VERSION=17
+ARG PYTHON_VERSION=3.12
+
+# --------------------------------------------- base1
+FROM postgres:${PG_VERSION}-alpine AS base1
+
+RUN apk add --no-cache \
+    coreutils \
+    bash \
+    mc \
+    procps \
+    openssh \
+    sshpass \
+    sudo \
+    git
+
+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
+
+# --------------------------------------------- base2_with_python-3
+FROM base1 AS base2_with_python-3
+
+RUN apk add --no-cache \
+    curl \
+    python3 \
+    python3-dev \
+    build-base \
+    musl-dev \
+    linux-headers \
+    # For pyenv \
+    patch \
+    xz-dev \
+    zip \
+    zlib-dev \
+    libffi-dev \
+    readline-dev \
+    openssl openssl-dev \
+    sqlite-dev \
+    bzip2-dev
+
+ENV PYTHON_BINARY=python3
+
+# --------------------------------------------- base3_with_python-3.7
+FROM base2_with_python-3 AS base3_with_python-3.7
+ENV PYTHON_VERSION=3.7
+
+# --------------------------------------------- base3_with_python-3.8.0
+FROM base2_with_python-3 AS base3_with_python-3.8.0
+ENV PYTHON_VERSION=3.8.0
+
+# --------------------------------------------- base3_with_python-3.8
+FROM base2_with_python-3 AS base3_with_python-3.8
+ENV PYTHON_VERSION=3.8
+
+# --------------------------------------------- base3_with_python-3.9
+FROM base2_with_python-3 AS base3_with_python-3.9
+ENV PYTHON_VERSION=3.9
+
+# --------------------------------------------- base3_with_python-3.10
+FROM base2_with_python-3 AS base3_with_python-3.10
+ENV PYTHON_VERSION=3.10
+
+# --------------------------------------------- base3_with_python-3.11
+FROM base2_with_python-3 AS base3_with_python-3.11
+ENV PYTHON_VERSION=3.11
+
+# --------------------------------------------- base3_with_python-3.12
+FROM base2_with_python-3 AS base3_with_python-3.12
+ENV PYTHON_VERSION=3.12
+
+# --------------------------------------------- base3_with_python-3.13
+FROM base2_with_python-3 AS base3_with_python-3.13
+ENV PYTHON_VERSION=3.13
+
+# --------------------------------------------- base3_with_python-3.14
+FROM base2_with_python-3 AS base3_with_python-3.14
+ENV PYTHON_VERSION=3.14
+
+# --------------------------------------------- final
+FROM base3_with_python-${PYTHON_VERSION} AS final
+
+EXPOSE 22
+RUN ssh-keygen -A
+
+RUN adduser -D test && addgroup -S sudo && adduser test sudo
+
+# It allows to use sudo without password
+RUN echo "test ALL=(ALL:ALL) NOPASSWD:ALL" >> /etc/sudoers
+
+# THIS CMD IS NEEDED TO CONNECT THROUGH SSH WITHOUT PASSWORD
+RUN echo "test:*" | chpasswd -e
+
+USER test
+RUN curl https://raw.githubusercontent.com/pyenv/pyenv-installer/master/bin/pyenv-installer | bash
+RUN ~/.pyenv/bin/pyenv install ${PYTHON_VERSION}
+USER root
+
+COPY --chown=test:test . /home/test/testgres
+WORKDIR /home/test/testgres
+
+ENV LANG=C.UTF-8
+
+RUN chmod 700 /home/test/ && \
+    mkdir -p /home/test/.ssh && \
+    chown -R test:test /home/test/.ssh && \
+    mkdir /home/test/testgres/logs && \
+    chown -R test:test /home/test/testgres/logs
+
+#
+# \"$@\"
+#   - 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'; \
+    /usr/sbin/sshd; \
+    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/; \
+su test -c \"ssh-keyscan -H localhost >> /home/test/.ssh/known_hosts\"; \
+su test -c \"ssh-keyscan -H 127.0.0.1 >> /home/test/.ssh/known_hosts\"; \
+if [ -n \"${TEST_CFG__REMOTE_HOST:-}\" ]; then \
+    su test -c \"ssh-keyscan -H ${TEST_CFG__REMOTE_HOST} >> /home/test/.ssh/known_hosts\"; \
+fi; \
+if [ -n \"${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 \"${TEST_CFG__REMOTE_SSH_KEY}\"; \
+    ls -la /home/test/.ssh/; \
+fi; \
+ls -la ./; \
+su test -c \"TEST_FILTER='' PATH=\"/home/test/.pyenv/bin:$PATH\" bash ./run_tests2.sh\"; \
+"]
diff --git a/Dockerfile--altlinux_10.tmpl b/Dockerfile--altlinux_10.tmpl
index d5fc5d7d..6eea5fba 100644
--- a/Dockerfile--altlinux_10.tmpl
+++ b/Dockerfile--altlinux_10.tmpl
@@ -4,41 +4,41 @@ ARG PYTHON_VERSION=3
 # --------------------------------------------- base1
 FROM alt:p10 AS base1
 
-RUN apt-get update
-RUN apt-get install -y sudo curl ca-certificates
-RUN apt-get update
-RUN apt-get install -y openssh-server openssh-clients
-RUN apt-get install -y time
-
-# RUN apt-get install -y mc
-
-RUN apt-get install -y libsqlite3-devel
-
-EXPOSE 22
-
-RUN ssh-keygen -A
+RUN apt-get update && apt-get install -y \
+    sudo \
+    curl \
+    ca-certificates \
+    openssh-server \
+    openssh-clients \
+    sshpass \
+    time \
+    su \
+    git \
+    libsqlite3-devel \
+    && apt-get clean
+
+RUN sed -i 's/#MaxStartups 10:30:100/MaxStartups 2000:30:2000/' /etc/openssh/sshd_config && \
+    sed -i 's/#MaxSessions 10/MaxSessions 500/' /etc/openssh/sshd_config && \
+    sed -i 's/#MaxAuthTries 6/MaxAuthTries 20/' /etc/openssh/sshd_config
 
 # --------------------------------------------- postgres
 FROM base1 AS base1_with_dev_tools
 
-RUN apt-get update
-
-RUN apt-get install -y git
-RUN apt-get install -y gcc
-RUN apt-get install -y make
-
-RUN apt-get install -y meson
-RUN apt-get install -y flex
-RUN apt-get install -y bison
-
-RUN apt-get install -y pkg-config
-RUN apt-get install -y libssl-devel
-RUN apt-get install -y libicu-devel
-RUN apt-get install -y libzstd-devel
-RUN apt-get install -y zlib-devel
-RUN apt-get install -y liblz4-devel
-RUN apt-get install -y libzstd-devel
-RUN apt-get install -y libxml2-devel
+RUN apt-get update && apt-get install -y \
+    gcc \
+    make \
+    meson \
+    flex \
+    bison \
+    pkg-config \
+    libssl-devel \
+    libicu-devel \
+    libzstd-devel \
+    zlib-devel \
+    liblz4-devel \
+    libzstd-devel \
+    libxml2-devel \
+    && apt-get clean
 
 # --------------------------------------------- postgres
 FROM base1_with_dev_tools AS base1_with_pg-17
@@ -61,48 +61,83 @@ RUN ln -s /pg/postgres/install/lib/libpq.so.5.17 /usr/lib64/libpq.so.5
 
 # --------------------------------------------- base2_with_python-3
 FROM base1_with_pg-${PG_VERSION} AS base2_with_python-3
-RUN apt-get install -y python3
-RUN apt-get install -y python3-dev
-RUN apt-get install -y python3-modules-sqlite3
+
+RUN apt-get update && apt-get install -y \
+    python3 \
+    python3-dev \
+    python3-modules-sqlite3 \
+    && apt-get clean
 
 ENV PYTHON_BINARY=python3
 
 # --------------------------------------------- final
 FROM base2_with_python-${PYTHON_VERSION} AS final
 
+EXPOSE 22
+RUN ssh-keygen -A
+
 RUN adduser test -G wheel
 
 # It enables execution of "sudo service ssh start" without password
 RUN echo "test ALL=(ALL:ALL) NOPASSWD: ALL" >> /etc/sudoers
 
-ADD --chown=test:test . /home/test/testgres
+#
+# Altlinux 10 and 11 too slowly create a new SSH connection (x6).
+#
+# AI: SPEED UP SSH 6 TIMES (REMOVE REVERSE DNS LOOKUP TIMEOUTS)
+#
+RUN echo "UseDNS no" >> /etc/openssh/sshd_config
+
+COPY --chown=test:test . /home/test/testgres
 WORKDIR /home/test/testgres
-RUN mkdir /home/test/testgres/logs
-RUN chown -R test:test /home/test/testgres/logs
 
 ENV LANG=C.UTF-8
 
-USER test
-
-RUN chmod 700 ~/
-RUN mkdir -p ~/.ssh
+RUN chmod 700 /home/test/ && \
+    mkdir -p /home/test/.ssh && \
+    chown -R test:test /home/test/.ssh
 
 #
-# Altlinux 10 and 11 too slowly create a new SSH connection (x6).
+# \"$@\"
+#   - quote is important!
+#   - "DUMMY-DUMMY-DUMMY" will be ignored. Do not ask me "why?". AXEZ.
 #
-
-ENTRYPOINT sh -c " \
+ENTRYPOINT ["sh", "-c", " \
+    set -eux; \
+    echo 'SYSTEM START: PREPARING SSH'; \
+    /usr/sbin/sshd; \
+    ls -la /home/test/.ssh/; \
+    \"$@\" \
+", "DUMMY-DUMMY-DUMMY"]
+
+# Run tests by default (master machine role)
+CMD ["bash", "-c", " \
 set -eux; \
-echo HELLO FROM ENTRYPOINT; \
-echo HOME DIR IS [`realpath ~/`]; \
-ls -la .; \
-sudo /usr/sbin/sshd; \
-sudo chmod 777 /home/test/testgres/logs; \
-ls -la . | grep logs; \
-ssh-keyscan -H localhost >> ~/.ssh/known_hosts; \
-ssh-keyscan -H 127.0.0.1 >> ~/.ssh/known_hosts; \
-ssh-keygen -t rsa -f ~/.ssh/id_rsa -q -N ''; \
-cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys; \
-chmod 600 ~/.ssh/authorized_keys; \
-ls -la ~/.ssh/; \
-TEST_FILTER=\"\" bash ./run_tests.sh;"
+echo \"HOME DIR IS [`realpath ~/`]\"; \
+echo \"WORK DIR IS [$(pwd)]\"; \
+if [ ! -f /home/test/.ssh/id_rsa ]; then \
+    su -c \"ssh-keygen -t rsa -f /home/test/.ssh/id_rsa -q -N ''\" test; \
+    su -c \"cat /home/test/.ssh/id_rsa.pub >> /home/test/.ssh/authorized_keys\" test; \
+    chmod 600 /home/test/.ssh/authorized_keys; \
+fi; \
+ls -la /home/test/.ssh/; \
+su -c \"ssh-keyscan -H localhost >> /home/test/.ssh/known_hosts\" test; \
+su -c \"ssh-keyscan -H 127.0.0.1 >> /home/test/.ssh/known_hosts\" test; \
+if [ -n \"${TEST_CFG__REMOTE_HOST:-}\" ]; then \
+    su -c \"ssh-keyscan -H ${TEST_CFG__REMOTE_HOST} >> /home/test/.ssh/known_hosts\" test; \
+fi; \
+if [ -n \"${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 ./; \
+# AUTOMATIC TRANSFER: Save all TEST_CFG__xxx variables to a temporary file \
+(env | grep -E '^(TEST_CFG__|PYTHON_BINARY)' | sed 's/^/export /' || echo '') > ./test_cfg_env.sh; \
+chown test:test ./test_cfg_env.sh; \
+cat ./test_cfg_env.sh; \
+# Run su -, pull in the file with variables and start the tests \
+su - test -c \"cd /home/test/testgres && source ./test_cfg_env.sh && TEST_FILTER='' bash ./run_tests.sh\"; \
+"]
diff --git a/Dockerfile--altlinux_11.tmpl b/Dockerfile--altlinux_11.tmpl
index 485f42f3..171ffea1 100644
--- a/Dockerfile--altlinux_11.tmpl
+++ b/Dockerfile--altlinux_11.tmpl
@@ -4,44 +4,42 @@ ARG PYTHON_VERSION=3
 # --------------------------------------------- base1
 FROM alt:p11 AS base1
 
-RUN apt-get update
-RUN apt-get install -y sudo curl ca-certificates
-RUN apt-get update
-RUN apt-get install -y openssh-server openssh-clients
-RUN apt-get install -y time
-
-# pgrep (for testgres.os_ops)
-RUN apt-get install -y procps
-
-# RUN apt-get install -y mc
-
-RUN apt-get install -y libsqlite3-devel
-
-EXPOSE 22
-
-RUN ssh-keygen -A
+RUN apt-get update && apt-get install -y \
+    sudo \
+    curl \
+    ca-certificates \
+    openssh-server \
+    openssh-clients \
+    sshpass \
+    time \
+    su \
+    git \
+    procps \
+    libsqlite3-devel \
+    && apt-get clean
+
+RUN sed -i 's/#MaxStartups 10:30:100/MaxStartups 2000:30:2000/' /etc/openssh/sshd_config && \
+    sed -i 's/#MaxSessions 10/MaxSessions 500/' /etc/openssh/sshd_config && \
+    sed -i 's/#MaxAuthTries 6/MaxAuthTries 20/' /etc/openssh/sshd_config
 
 # --------------------------------------------- postgres
 FROM base1 AS base1_with_dev_tools
 
-RUN apt-get update
-
-RUN apt-get install -y git
-RUN apt-get install -y gcc
-RUN apt-get install -y make
-
-RUN apt-get install -y meson
-RUN apt-get install -y flex
-RUN apt-get install -y bison
-
-RUN apt-get install -y pkg-config
-RUN apt-get install -y libssl-devel
-RUN apt-get install -y libicu-devel
-RUN apt-get install -y libzstd-devel
-RUN apt-get install -y zlib-devel
-RUN apt-get install -y liblz4-devel
-RUN apt-get install -y libzstd-devel
-RUN apt-get install -y libxml2-devel
+RUN apt-get update && apt-get install -y \
+    gcc \
+    make \
+    meson \
+    flex \
+    bison \
+    pkg-config \
+    libssl-devel \
+    libicu-devel \
+    libzstd-devel \
+    zlib-devel \
+    liblz4-devel \
+    libzstd-devel \
+    libxml2-devel \
+    && apt-get clean
 
 # --------------------------------------------- postgres
 FROM base1_with_dev_tools AS base1_with_pg-17
@@ -64,48 +62,83 @@ RUN ln -s /pg/postgres/install/lib/libpq.so.5.17 /usr/lib64/libpq.so.5
 
 # --------------------------------------------- base2_with_python-3
 FROM base1_with_pg-${PG_VERSION} AS base2_with_python-3
-RUN apt-get install -y python3
-RUN apt-get install -y python3-dev
-RUN apt-get install -y python3-modules-sqlite3
+
+RUN apt-get update && apt-get install -y \
+    python3 \
+    python3-dev \
+    python3-modules-sqlite3 \
+    && apt-get clean
 
 ENV PYTHON_BINARY=python3
 
 # --------------------------------------------- final
 FROM base2_with_python-${PYTHON_VERSION} AS final
 
+EXPOSE 22
+RUN ssh-keygen -A
+
 RUN adduser test -G wheel
 
 # It enables execution of "sudo service ssh start" without password
 RUN echo "test ALL=(ALL:ALL) NOPASSWD: ALL" >> /etc/sudoers
 
-ADD --chown=test:test . /home/test/testgres
+#
+# Altlinux 10 and 11 too slowly create a new SSH connection (x6).
+#
+# AI: SPEED UP SSH 6 TIMES (REMOVE REVERSE DNS LOOKUP TIMEOUTS)
+#
+RUN echo "UseDNS no" >> /etc/openssh/sshd_config
+
+COPY --chown=test:test . /home/test/testgres
 WORKDIR /home/test/testgres
-RUN mkdir /home/test/testgres/logs
-RUN chown -R test:test /home/test/testgres/logs
 
 ENV LANG=C.UTF-8
 
-USER test
-
-RUN chmod 700 ~/
-RUN mkdir -p ~/.ssh
+RUN chmod 700 /home/test/ && \
+    mkdir -p /home/test/.ssh && \
+    chown -R test:test /home/test/.ssh
 
 #
-# Altlinux 10 and 11 too slowly create a new SSH connection (x6).
+# \"$@\"
+#   - quote is important!
+#   - "DUMMY-DUMMY-DUMMY" will be ignored. Do not ask me "why?". AXEZ.
 #
-
-ENTRYPOINT sh -c " \
+ENTRYPOINT ["sh", "-c", " \
+    set -eux; \
+    echo 'SYSTEM START: PREPARING SSH'; \
+    /usr/sbin/sshd; \
+    ls -la /home/test/.ssh/; \
+    \"$@\" \
+", "DUMMY-DUMMY-DUMMY"]
+
+# Run tests by default (master machine role)
+CMD ["bash", "-c", " \
 set -eux; \
-echo HELLO FROM ENTRYPOINT; \
-echo HOME DIR IS [`realpath ~/`]; \
-ls -la .; \
-sudo /usr/sbin/sshd; \
-sudo chmod 777 /home/test/testgres/logs; \
-ls -la . | grep logs; \
-ssh-keyscan -H localhost >> ~/.ssh/known_hosts; \
-ssh-keyscan -H 127.0.0.1 >> ~/.ssh/known_hosts; \
-ssh-keygen -t rsa -f ~/.ssh/id_rsa -q -N ''; \
-cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys; \
-chmod 600 ~/.ssh/authorized_keys; \
-ls -la ~/.ssh/; \
-TEST_FILTER=\"\" bash ./run_tests.sh;"
+echo \"HOME DIR IS [`realpath ~/`]\"; \
+echo \"WORK DIR IS [$(pwd)]\"; \
+if [ ! -f /home/test/.ssh/id_rsa ]; then \
+    su -c \"ssh-keygen -t rsa -f /home/test/.ssh/id_rsa -q -N ''\" test; \
+    su -c \"cat /home/test/.ssh/id_rsa.pub >> /home/test/.ssh/authorized_keys\" test; \
+    chmod 600 /home/test/.ssh/authorized_keys; \
+fi; \
+ls -la /home/test/.ssh/; \
+su -c \"ssh-keyscan -H localhost >> /home/test/.ssh/known_hosts\" test; \
+su -c \"ssh-keyscan -H 127.0.0.1 >> /home/test/.ssh/known_hosts\" test; \
+if [ -n \"${TEST_CFG__REMOTE_HOST:-}\" ]; then \
+    su -c \"ssh-keyscan -H ${TEST_CFG__REMOTE_HOST} >> /home/test/.ssh/known_hosts\" test; \
+fi; \
+if [ -n \"${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 ./; \
+# AUTOMATIC TRANSFER: Save all TEST_CFG__xxx variables to a temporary file \
+(env | grep -E '^(TEST_CFG__|PYTHON_BINARY)' | sed 's/^/export /' || echo '') > ./test_cfg_env.sh; \
+chown test:test ./test_cfg_env.sh; \
+cat ./test_cfg_env.sh; \
+# Run su -, pull in the file with variables and start the tests \
+su - test -c \"cd /home/test/testgres && source ./test_cfg_env.sh && TEST_FILTER='' bash ./run_tests.sh\"; \
+"]
diff --git a/Dockerfile--astralinux_1_7.tmpl b/Dockerfile--astralinux_1_7.tmpl
index 881f3081..84e599ed 100644
--- a/Dockerfile--astralinux_1_7.tmpl
+++ b/Dockerfile--astralinux_1_7.tmpl
@@ -4,37 +4,43 @@ ARG PYTHON_VERSION=3
 # --------------------------------------------- base1
 FROM packpack/packpack:astra-1.7 AS base1
 
-RUN apt update
-RUN apt install -y sudo curl ca-certificates
-RUN apt update
-RUN apt install -y openssh-server
-RUN apt install -y time
-# RUN apt install -y netcat-traditional
-
-RUN apt install -y git
-RUN apt install -y iproute2
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    sudo \
+    curl \
+    ca-certificates \
+    openssh-server \
+    sshpass \
+    iproute2 \
+    git \
+    time \
+    && 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
 
 # --------------------------------------------- postgres
 FROM base1 AS base1_with_dev_tools
 
-RUN apt-get update
-
-RUN apt-get install -y git
-RUN apt-get install -y gcc
-RUN apt-get install -y make
-
-RUN apt-get install -y meson
-RUN apt-get install -y flex
-RUN apt-get install -y bison
-
-RUN apt-get install -y pkg-config
-RUN apt-get install -y libssl-dev
-RUN apt-get install -y libicu-dev
-RUN apt-get install -y libzstd-dev
-RUN apt-get install -y zlib1g-dev
-RUN apt-get install -y liblz4-dev
-RUN apt-get install -y libzstd-dev
-RUN apt-get install -y libxml2-dev
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    make \
+    meson \
+    flex \
+    bison \
+    pkg-config \
+    libssl-dev \
+    libicu-dev \
+    libzstd-dev \
+    zlib1g-dev \
+    liblz4-dev \
+    libzstd-dev \
+    libxml2-dev \
+    && rm -rf /var/lib/apt/lists/*
 
 # --------------------------------------------- postgres
 FROM base1_with_dev_tools AS base1_with_pg-17
@@ -60,7 +66,12 @@ RUN ln -s /pg/postgres/install/lib/libpq.so.5.17 /usr/lib/libpq.so.5
 
 # --------------------------------------------- base2_with_python-3
 FROM base1_with_pg-${PG_VERSION} AS base2_with_python-3
-RUN apt install -y python3 python3-dev python3-venv
+
+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
 
@@ -68,7 +79,6 @@ ENV PYTHON_BINARY=python3
 FROM base2_with_python-${PYTHON_VERSION} AS final
 
 EXPOSE 22
-
 RUN ssh-keygen -A
 
 RUN useradd -m test
@@ -77,37 +87,57 @@ RUN useradd -m test
 # MY OLD:
 # RUN sh -c "echo test ALL=NOPASSWD:ALL" >> /etc/sudoers
 # AI:
-RUN echo "test ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
+RUN echo "test ALL=(ALL:ALL) NOPASSWD:ALL" >> /etc/sudoers
 
 # THIS CMD IS NEEDED TO CONNECT THROUGH SSH WITHOUT PASSWORD
-RUN sh -c "echo "test:*" | chpasswd -e"
-RUN sed -i 's/UsePAM yes/UsePAM no/' /etc/ssh/sshd_config
+RUN echo "test:*" | chpasswd -e && \
+    sed -i 's/UsePAM yes/UsePAM no/' /etc/ssh/sshd_config
 
-ADD --chown=test:test . /home/test/testgres
+COPY --chown=test:test . /home/test/testgres
 WORKDIR /home/test/testgres
-RUN mkdir /home/test/testgres/logs
-RUN chown -R test:test /home/test/testgres/logs
 
 ENV LANG=C.UTF-8
 
-USER test
-
-RUN chmod 700 ~/
-RUN mkdir -p ~/.ssh
-RUN chmod 700 ~/.ssh
-
-ENTRYPOINT sh -c " \
+RUN chmod 700 /home/test/ && \
+    mkdir -p /home/test/.ssh && \
+    chown -R test:test /home/test/.ssh
+
+#
+# \"$@\"
+#   - quote is important!
+#   - "DUMMY-DUMMY-DUMMY" will be ignored. Do not ask me "why?". AXEZ.
+#
+ENTRYPOINT ["sh", "-c", " \
+    set -eux; \
+    echo 'SYSTEM START: PREPARING SSH'; \
+    service ssh start; \
+    ls -la /home/test/.ssh/; \
+    \"$@\" \
+", "DUMMY-DUMMY-DUMMY"]
+
+# Run tests by default (master machine role)
+CMD ["bash", "-c", " \
 set -eux; \
-echo HELLO FROM ENTRYPOINT; \
-echo HOME DIR IS [`realpath ~/`]; \
-ls -la .; \
-sudo service ssh start; \
-sudo chmod 777 /home/test/testgres/logs; \
-ls -la . | grep logs; \
-ssh-keyscan -H localhost >> ~/.ssh/known_hosts; \
-ssh-keyscan -H 127.0.0.1 >> ~/.ssh/known_hosts; \
-ssh-keygen -t rsa -f ~/.ssh/id_rsa -q -N ''; \
-cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys; \
-chmod 600 ~/.ssh/authorized_keys; \
-ls -la ~/.ssh/; \
-TEST_FILTER=\"\" bash ./run_tests.sh;"
+echo \"HOME DIR IS [`realpath ~/`]\"; \
+echo \"WORK DIR IS [$(pwd)]\"; \
+if [ ! -f /home/test/.ssh/id_rsa ]; then \
+    su test -c \"ssh-keygen -t rsa -f /home/test/.ssh/id_rsa -q -N ''\"; \
+    su test -c \"cat /home/test/.ssh/id_rsa.pub >> /home/test/.ssh/authorized_keys\"; \
+    chmod 600 /home/test/.ssh/authorized_keys; \
+fi; \
+ls -la /home/test/.ssh/; \
+su test -c \"ssh-keyscan -H localhost >> /home/test/.ssh/known_hosts\"; \
+su test -c \"ssh-keyscan -H 127.0.0.1 >> /home/test/.ssh/known_hosts\"; \
+if [ -n \"${TEST_CFG__REMOTE_HOST:-}\" ]; then \
+    su test -c \"ssh-keyscan -H ${TEST_CFG__REMOTE_HOST} >> /home/test/.ssh/known_hosts\"; \
+fi; \
+if [ -n \"${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 \"${TEST_CFG__REMOTE_SSH_KEY}\"; \
+    ls -la /home/test/.ssh/; \
+fi; \
+ls -la ./; \
+su test -c \"TEST_FILTER='' bash ./run_tests.sh\"; \
+"]
diff --git a/Dockerfile--std-all.tmpl b/Dockerfile--std-all.tmpl
deleted file mode 100644
index c6dabd43..00000000
--- a/Dockerfile--std-all.tmpl
+++ /dev/null
@@ -1,70 +0,0 @@
-ARG PG_VERSION=17
-ARG PYTHON_VERSION=3
-
-# --------------------------------------------- base1
-FROM postgres:${PG_VERSION}-alpine AS base1
-
-RUN apk add --no-cache coreutils
-
-# --------------------------------------------- base2_with_python-3
-FROM base1 AS base2_with_python-3
-RUN apk add --no-cache curl python3 python3-dev build-base musl-dev linux-headers
-ENV PYTHON_BINARY=python3
-
-# --------------------------------------------- final
-FROM base2_with_python-${PYTHON_VERSION} AS final
-
-#RUN apk add --no-cache mc
-RUN apk add --no-cache git
-
-# Full version of "ps" command
-RUN apk add --no-cache procps
-
-RUN apk add --no-cache openssh
-RUN apk add --no-cache sudo
-
-ENV LANG=C.UTF-8
-
-RUN addgroup -S sudo
-RUN adduser -D test
-RUN addgroup test sudo
-
-EXPOSE 22
-RUN ssh-keygen -A
-
-ADD --chown=test:test . /home/test/testgres
-WORKDIR /home/test/testgres
-RUN mkdir /home/test/testgres/logs
-RUN chown -R test:test /home/test/testgres/logs
-
-# It allows to use sudo without password
-RUN echo "test ALL=(ALL:ALL) NOPASSWD:ALL" >> /etc/sudoers
-
-# THIS CMD IS NEEDED TO CONNECT THROUGH SSH WITHOUT PASSWORD
-RUN echo "test:*" | chpasswd -e
-
-USER test
-
-# THIS CMD IS NEEDED TO CONNECT THROUGH SSH WITHOUT PASSWORD
-RUN chmod 700 ~/
-
-RUN mkdir -p ~/.ssh
-#RUN chmod 700 ~/.ssh
-
-#ENTRYPOINT PYTHON_VERSION=${PYTHON_VERSION} bash run_tests.sh
-
-ENTRYPOINT sh -c " \
-set -eux; \
-echo HELLO FROM ENTRYPOINT; \
-echo HOME DIR IS [`realpath ~/`]; \
-ls -la .; \
-ssh-keygen -t rsa -f ~/.ssh/id_rsa -q -N ''; \
-cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys; \
-chmod 600 ~/.ssh/authorized_keys; \
-ls -la ~/.ssh/; \
-sudo /usr/sbin/sshd; \
-sudo chmod 777 /home/test/testgres/logs; \
-ls -la . | grep logs; \
-ssh-keyscan -H localhost >> ~/.ssh/known_hosts; \
-ssh-keyscan -H 127.0.0.1 >> ~/.ssh/known_hosts; \
-TEST_FILTER=\"\" bash run_tests.sh;"
diff --git a/Dockerfile--std.tmpl b/Dockerfile--std.tmpl
deleted file mode 100644
index 5c5807ec..00000000
--- a/Dockerfile--std.tmpl
+++ /dev/null
@@ -1,43 +0,0 @@
-ARG PG_VERSION=17
-ARG PYTHON_VERSION=3
-
-# --------------------------------------------- base1
-FROM postgres:${PG_VERSION}-alpine AS base1
-
-RUN apk add --no-cache coreutils
-
-# --------------------------------------------- base2_with_python-3
-FROM base1 AS base2_with_python-3
-RUN apk add --no-cache curl python3 python3-dev build-base musl-dev linux-headers
-ENV PYTHON_BINARY=python3
-
-# --------------------------------------------- final
-FROM base2_with_python-${PYTHON_VERSION} AS final
-
-RUN apk add --no-cache git
-
-RUN apk add --no-cache sudo
-
-ENV LANG=C.UTF-8
-
-RUN addgroup -S sudo
-RUN adduser -D test
-RUN addgroup test sudo
-
-ADD --chown=test:test . /home/test/testgres
-WORKDIR /home/test/testgres
-RUN mkdir /home/test/testgres/logs
-RUN chown -R test:test /home/test/testgres/logs
-
-# It allows to use sudo without password
-RUN echo "test ALL=(ALL:ALL) NOPASSWD:ALL" >> /etc/sudoers
-
-USER test
-ENTRYPOINT sh -c " \
-set -eux; \
-echo HELLO FROM ENTRYPOINT; \
-echo HOME DIR IS [`realpath ~/`]; \
-ls -la .; \
-sudo chmod 777 /home/test/testgres/logs; \
-ls -la . | grep logs; \
-bash run_tests.sh;"
diff --git a/Dockerfile--std2-all.tmpl b/Dockerfile--std2-all.tmpl
deleted file mode 100644
index 8a3309b5..00000000
--- a/Dockerfile--std2-all.tmpl
+++ /dev/null
@@ -1,118 +0,0 @@
-ARG PG_VERSION=17
-ARG PYTHON_VERSION=3.12
-
-# --------------------------------------------- base1
-FROM postgres:${PG_VERSION}-alpine AS base1
-
-RUN apk add --no-cache coreutils
-
-# --------------------------------------------- base2_with_python-3
-FROM base1 AS base2_with_python-3
-ENV PYTHON_BINARY=python3
-RUN apk add --no-cache curl python3 python3-dev build-base musl-dev linux-headers
-
-# For pyenv
-RUN apk add patch
-RUN apk add git
-RUN apk add xz-dev
-RUN apk add zip
-RUN apk add zlib-dev
-RUN apk add libffi-dev
-RUN apk add readline-dev
-RUN apk add openssl openssl-dev
-RUN apk add sqlite-dev
-RUN apk add bzip2-dev
-
-# --------------------------------------------- base3_with_python-3.7
-FROM base2_with_python-3 AS base3_with_python-3.7
-ENV PYTHON_VERSION=3.7
-
-# --------------------------------------------- base3_with_python-3.8.0
-FROM base2_with_python-3 AS base3_with_python-3.8.0
-ENV PYTHON_VERSION=3.8.0
-
-# --------------------------------------------- base3_with_python-3.8
-FROM base2_with_python-3 AS base3_with_python-3.8
-ENV PYTHON_VERSION=3.8
-
-# --------------------------------------------- base3_with_python-3.9
-FROM base2_with_python-3 AS base3_with_python-3.9
-ENV PYTHON_VERSION=3.9
-
-# --------------------------------------------- base3_with_python-3.10
-FROM base2_with_python-3 AS base3_with_python-3.10
-ENV PYTHON_VERSION=3.10
-
-# --------------------------------------------- base3_with_python-3.11
-FROM base2_with_python-3 AS base3_with_python-3.11
-ENV PYTHON_VERSION=3.11
-
-# --------------------------------------------- base3_with_python-3.12
-FROM base2_with_python-3 AS base3_with_python-3.12
-ENV PYTHON_VERSION=3.12
-
-# --------------------------------------------- base3_with_python-3.13
-FROM base2_with_python-3 AS base3_with_python-3.13
-ENV PYTHON_VERSION=3.13
-
-# --------------------------------------------- base3_with_python-3.14
-FROM base2_with_python-3 AS base3_with_python-3.14
-ENV PYTHON_VERSION=3.14
-
-# --------------------------------------------- final
-FROM base3_with_python-${PYTHON_VERSION} AS final
-
-#RUN apk add --no-cache mc
-
-# Full version of "ps" command
-RUN apk add --no-cache procps
-
-RUN apk add --no-cache openssh
-RUN apk add --no-cache sudo
-
-ENV LANG=C.UTF-8
-
-RUN addgroup -S sudo
-RUN adduser -D test
-RUN addgroup test sudo
-
-EXPOSE 22
-RUN ssh-keygen -A
-
-# It allows to use sudo without password
-RUN echo "test ALL=(ALL:ALL) NOPASSWD:ALL" >> /etc/sudoers
-
-# THIS CMD IS NEEDED TO CONNECT THROUGH SSH WITHOUT PASSWORD
-RUN echo "test:*" | chpasswd -e
-
-USER test
-
-RUN curl https://raw.githubusercontent.com/pyenv/pyenv-installer/master/bin/pyenv-installer | bash
-RUN ~/.pyenv/bin/pyenv install ${PYTHON_VERSION}
-
-ADD --chown=test:test . /home/test/testgres
-WORKDIR /home/test/testgres
-RUN mkdir /home/test/testgres/logs
-RUN chown -R test:test /home/test/testgres/logs
-
-# THIS CMD IS NEEDED TO CONNECT THROUGH SSH WITHOUT PASSWORD
-RUN chmod 700 ~/
-
-RUN mkdir -p ~/.ssh
-
-ENTRYPOINT sh -c " \
-set -eux; \
-echo HELLO FROM ENTRYPOINT; \
-echo HOME DIR IS [`realpath ~/`]; \
-ls -la .; \
-ssh-keygen -t rsa -f ~/.ssh/id_rsa -q -N ''; \
-cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys; \
-chmod 600 ~/.ssh/authorized_keys; \
-ls -la ~/.ssh/; \
-sudo /usr/sbin/sshd; \
-sudo chmod 777 /home/test/testgres/logs; \
-ls -la . | grep logs; \
-ssh-keyscan -H localhost >> ~/.ssh/known_hosts; \
-ssh-keyscan -H 127.0.0.1 >> ~/.ssh/known_hosts; \
-export PATH=\"~/.pyenv/bin:$PATH\"; \
-TEST_FILTER=\"\" bash run_tests2.sh;"
diff --git a/Dockerfile--ubuntu_24_04.tmpl b/Dockerfile--ubuntu_24_04.tmpl
index 0f2a7834..eda0856c 100644
--- a/Dockerfile--ubuntu_24_04.tmpl
+++ b/Dockerfile--ubuntu_24_04.tmpl
@@ -1,78 +1,107 @@
-ARG PG_VERSION
+ARG PG_VERSION=17
 ARG PYTHON_VERSION=3
 
 # --------------------------------------------- base1
 FROM ubuntu:24.04 AS base1
 ARG PG_VERSION
 
-RUN apt update
-RUN apt install -y sudo curl ca-certificates
-RUN apt update
-RUN apt install -y openssh-server
-RUN apt install -y time
-RUN apt install -y netcat-traditional
-
-RUN apt install -y git
-RUN apt install -y iproute2
-
-RUN apt update
-RUN apt install -y postgresql-common
+# 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 \
+    && 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 update
-RUN apt install -y postgresql-${PG_VERSION}
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    postgresql-${PG_VERSION}
 
 # --------------------------------------------- base2_with_python-3
 FROM base1 AS base2_with_python-3
-RUN apt install -y python3 python3-dev python3-venv libpq-dev build-essential
+
+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
 
 # --------------------------------------------- final
 FROM base2_with_python-${PYTHON_VERSION} AS final
 
 EXPOSE 22
-
 RUN ssh-keygen -A
 
-RUN adduser test
-RUN chown postgres:postgres /var/run/postgresql
-RUN chmod 775 /var/run/postgresql
-RUN usermod -aG postgres test
+RUN useradd -m test && usermod -aG postgres test
 
 # It enables execution of "sudo service ssh start" without password
-# RUN echo "test ALL=NOPASSWD:/usr/sbin/service ssh start" >> /etc/sudoers
-# RUN echo "test ALL=NOPASSWD:ALL" >> /etc/sudoers
-RUN echo "test ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
+RUN echo "test ALL=(ALL:ALL) NOPASSWD:ALL" >> /etc/sudoers
 
-ADD --chown=test:test . /home/test/testgres
+COPY --chown=test:test . /home/test/testgres
 WORKDIR /home/test/testgres
-RUN mkdir /home/test/testgres/logs
-RUN chown -R test:test /home/test/testgres/logs
 
 ENV LANG=C.UTF-8
 
-USER test
-
-RUN chmod 700 ~/
-RUN mkdir -p ~/.ssh
-
-ENTRYPOINT sh -c " \
-#set -eux; \
-echo HELLO FROM ENTRYPOINT; \
-echo HOME DIR IS [`realpath ~/`]; \
-ls -la .; \
-service ssh enable; \
-sudo service ssh start; \
-sudo chmod 777 /home/test/testgres/logs; \
-ls -la . | grep logs; \
-ssh-keyscan -H localhost >> ~/.ssh/known_hosts; \
-ssh-keyscan -H 127.0.0.1 >> ~/.ssh/known_hosts; \
-ssh-keygen -t rsa -f ~/.ssh/id_rsa -q -N ''; \
-cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys; \
-chmod 600 ~/.ssh/authorized_keys; \
-ls -la ~/.ssh/; \
-TEST_FILTER=\"\" bash ./run_tests.sh;"
+RUN chmod 700 /home/test/ && \
+    mkdir -p /home/test/.ssh && \
+    chown -R test:test /home/test/.ssh
+
+#
+# \"$@\"
+#   - quote is important!
+#   - "DUMMY-DUMMY-DUMMY" will be ignored. Do not ask me "why?". AXEZ.
+#
+ENTRYPOINT ["sh", "-c", " \
+    set -eux; \
+    echo 'SYSTEM START: PREPARING SSH'; \
+    service ssh start; \
+    ls -la /home/test/.ssh/; \
+    \"$@\" \
+", "DUMMY-DUMMY-DUMMY"]
+
+# Run tests by default (master machine role)
+CMD ["bash", "-c", " \
+set -eux; \
+echo \"HOME DIR IS [`realpath ~/`]\"; \
+echo \"WORK DIR IS [$(pwd)]\"; \
+if [ ! -f /home/test/.ssh/id_rsa ]; then \
+    su test -c \"ssh-keygen -t rsa -f /home/test/.ssh/id_rsa -q -N ''\"; \
+    su test -c \"cat /home/test/.ssh/id_rsa.pub >> /home/test/.ssh/authorized_keys\"; \
+    chmod 600 /home/test/.ssh/authorized_keys; \
+fi; \
+ls -la /home/test/.ssh/; \
+su test -c \"ssh-keyscan -H localhost >> /home/test/.ssh/known_hosts\"; \
+su test -c \"ssh-keyscan -H 127.0.0.1 >> /home/test/.ssh/known_hosts\"; \
+if [ -n \"${TEST_CFG__REMOTE_HOST:-}\" ]; then \
+    su test -c \"ssh-keyscan -H ${TEST_CFG__REMOTE_HOST} >> /home/test/.ssh/known_hosts\"; \
+fi; \
+if [ -n \"${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\"; \
+"]
diff --git a/run_tests.sh b/run_tests.sh
index ebb02490..dafa085e 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -6,6 +6,8 @@ if [ -z ${TEST_FILTER+x} ]; \
 then export TEST_FILTER="TestTestgresLocal or (TestTestgresCommon and (not remote))"; \
 fi
 
+echo NPROC: $(nproc)
+
 # fail early
 echo check that pg_config is in PATH
 command -v pg_config
@@ -25,24 +27,68 @@ rm -f $COVERAGE_FILE
 
 pip install coverage
 
+if [ -n "${TEST_CFG__REMOTE_HOST:-}" ] && [ -n "${TEST_CFG__REMOTE_USERNAME:-}" ]; then
+    cmd_str="ssh"
+
+    if [ -n "${TEST_CFG__REMOTE_PASSWORD:-}" ]; then
+        cmd_str="sshpass -p \"$TEST_CFG__REMOTE_PASSWORD\" $cmd_str"
+    fi
+
+    [ -n "${TEST_CFG__REMOTE_SSH_KEY:-}" ] && cmd_str="$cmd_str -i \"$TEST_CFG__REMOTE_SSH_KEY\""
+    [ -n "${TEST_CFG__REMOTE_PORT:-}" ]    && cmd_str="$cmd_str -p \"$TEST_CFG__REMOTE_PORT\""
+
+    cmd_str="$cmd_str \"$TEST_CFG__REMOTE_USERNAME@$TEST_CFG__REMOTE_HOST\" 'df -T'"
+    REMOTE_FS_STATE_QUERY="$cmd_str"
+else
+    REMOTE_FS_STATE_QUERY=""
+fi
+
+show_fs_state() {
+    df -T
+    if [ -n "$REMOTE_FS_STATE_QUERY" ]; then
+        eval "$REMOTE_FS_STATE_QUERY"
+    fi
+}
+
+# ---------------------------------------- PATH
+
+show_fs_state
+
 # run tests (PATH)
 time coverage run -a -m pytest -l -vvv -n 4 -k "${TEST_FILTER}"
 
+# ---------------------------------------- PG_BIN
+
+show_fs_state
+
 # run tests (PG_BIN)
 PG_BIN=$(pg_config --bindir) \
 time coverage run -a -m pytest -l -vvv -n 4 -k "${TEST_FILTER}"
 
+# ---------------------------------------- PG_CONFIG
+
+show_fs_state
+
 # run tests (PG_CONFIG)
 PG_CONFIG=$(pg_config --bindir)/pg_config \
 time coverage run -a -m pytest -l -vvv -n 4 -k "${TEST_FILTER}"
 
+# ---------------------------------------- pg8000
+
+show_fs_state
+
 # test pg8000
 pip uninstall -y psycopg2
 pip install pg8000
 PG_CONFIG=$(pg_config --bindir)/pg_config \
 time coverage run -a -m pytest -l -vvv -n 4 -k "${TEST_FILTER}"
 
-# show coverage
+# ---------------------------------------- finish
+
+show_fs_state
+
+# ---------------------------------------- coverage
+
 coverage report
 
 pip uninstall -y coverage
diff --git a/tests/helpers/global_data.py b/tests/helpers/global_data.py
index 67004538..c98ae9b4 100644
--- a/tests/helpers/global_data.py
+++ b/tests/helpers/global_data.py
@@ -8,6 +8,7 @@
 from src.node import PortManager__Generic2
 
 import os
+import typing
 
 
 class OsOpsDescr:
@@ -21,11 +22,18 @@ def __init__(self, sign: str, os_ops: OsOperations):
         self.os_ops = os_ops
 
 
+def _to_int_or_none(v: typing.Any) -> typing.Optional[int]:
+    return v if v is None else int(v)
+
+
 class OsOpsDescrs:
     sm_remote_conn_params = ConnectionParams(
-        host=os.getenv('RDBMS_TESTPOOL1_HOST') or '127.0.0.1',
-        username=os.getenv('USER'),
-        ssh_key=os.getenv('RDBMS_TESTPOOL_SSHKEY'))
+        host=os.getenv('TEST_CFG__REMOTE_HOST', '127.0.0.1'),
+        port=_to_int_or_none(os.getenv('TEST_CFG__REMOTE_PORT')),
+        username=os.getenv('TEST_CFG__REMOTE_USERNAME'),
+        ssh_key=os.getenv('TEST_CFG__REMOTE_SSH_KEY'),
+        password=os.getenv('TEST_CFG__REMOTE_PASSWORD'),
+    )
 
     sm_remote_os_ops = RemoteOperations(sm_remote_conn_params)