diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
new file mode 100644
index 0000000..c93ebd4
--- /dev/null
+++ b/.github/workflows/build.yaml
@@ -0,0 +1,68 @@
+name: Build Artifacts
+on:
+  release:
+    types: [created]
+  push:
+    branches:
+      - '**'
+  workflow_dispatch:
+    inputs:
+      publish_docker:
+        description: "Publish image to ghcr.io/netcracker/pgskipper-upgrade"
+        type: boolean
+        default: false
+        required: false
+
+env:
+  TAG_NAME: ${{ github.event.release.tag_name || github.ref }}
+  PUSH: ${{ github.event_name != 'workflow_dispatch' || inputs.publish_docker }}
+
+jobs:
+  multiplatform_build:
+    strategy:
+      fail-fast: false
+      matrix:
+        component:
+          - name: pgskipper-upgrade
+            file: Dockerfile
+            context: ""
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${GITHUB_ACTOR}
+          password: ${{secrets.GITHUB_TOKEN}}
+      - name: Prepare Tag
+        run: echo "TAG_NAME=$(echo ${TAG_NAME} | sed 's@refs/tags/@@;s@refs/heads/@@;s@/@_@g')" >> $GITHUB_ENV
+      - name: Get package IDs for delete 
+        id: get-ids-for-delete
+        uses: Netcracker/get-package-ids@v0.0.1
+        with:
+          component-name: ${{ matrix.component.name }}
+          component-tag: ${{ env.TAG_NAME }}
+          access-token: ${{secrets.GITHUB_TOKEN}}
+        if: ${{ env.PUSH }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          no-cache: true
+          context: ${{ matrix.component.context }}
+          file: ${{ matrix.component.file }}
+          platforms: linux/amd64 #,linux/arm64
+          push: ${{ env.PUSH }}
+          tags: ghcr.io/netcracker/${{ matrix.component.name }}:${{ env.TAG_NAME }}
+          provenance: false
+      - uses: actions/delete-package-versions@v5
+        with: 
+          package-name: ${{ matrix.component.name }}
+          package-type: 'container'
+          package-version-ids: ${{ steps.get-ids-for-delete.outputs.ids-for-delete }}
+        if: ${{ steps.get-ids-for-delete.outputs.ids-for-delete != '' }}
diff --git a/.github/workflows/clean.yaml b/.github/workflows/clean.yaml
new file mode 100644
index 0000000..96c763a
--- /dev/null
+++ b/.github/workflows/clean.yaml
@@ -0,0 +1,35 @@
+name: Branch Deleted
+on: delete
+
+env:
+  COMPONENT_NAME: pgskipper-upgrade
+  TAG_NAME: ${{ github.event.ref }}
+
+jobs:
+  delete:
+    if: github.event.ref_type == 'branch'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Prepare Tag
+        run: echo "TAG_NAME=$(echo ${TAG_NAME} | sed 's@refs/heads/@@;s@/@_@g')" >> $GITHUB_ENV
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${GITHUB_ACTOR}
+          password: ${{secrets.GITHUB_TOKEN}}
+      - name: Get package IDs for delete 
+        id: get-ids-for-delete
+        uses: Netcracker/get-package-ids@v0.0.1
+        with:
+          component-name: ${{ env.COMPONENT_NAME }}
+          component-tag: ${{ env.TAG_NAME }}
+          access-token: ${{secrets.GITHUB_TOKEN}}
+      - uses: actions/delete-package-versions@v5
+        with: 
+          package-name: ${{ env.COMPONENT_NAME }}
+          package-type: 'container'
+          package-version-ids: ${{ steps.get-ids-for-delete.outputs.ids-for-delete }}
+        if: ${{ steps.get-ids-for-delete.outputs.ids-for-delete != '' }}
diff --git a/.github/workflows/license.yaml b/.github/workflows/license.yaml
new file mode 100644
index 0000000..6609d79
--- /dev/null
+++ b/.github/workflows/license.yaml
@@ -0,0 +1,24 @@
+name: Add License Header
+on:
+  push:
+    branches:
+      - 'main'
+env:
+   COPYRIGHT_COMPANY: 'NetCracker Technology Corporation'
+   COPYRIGHT_YEAR: '2024-2025'
+jobs:
+  license:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GH_ACCESS_TOKEN }}
+      - run: docker run -v "${PWD}:/src" -i ghcr.io/google/addlicense -v -c "${{ env.COPYRIGHT_COMPANY }}" -y "${{ env.COPYRIGHT_YEAR }}" $(find . -type f -name "*.go" -o -type f -name "*.sh" -o -type f -name "*.py" | xargs echo)
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          commit-message: Auto-update license header
+          branch: license-update
+          title: Add License Header
+          body: Automated license header update
+          delete-branch: true
\ No newline at end of file
diff --git a/CODE-OF-CONDUCT.md b/CODE-OF-CONDUCT.md
new file mode 100644
index 0000000..f5b511b
--- /dev/null
+++ b/CODE-OF-CONDUCT.md
@@ -0,0 +1,73 @@
+# Code of Conduct
+
+This repository is governed by following code of conduct guidelines.
+
+We put collaboration, trust, respect and transparency as core values for our community.
+Our community welcomes participants from all over the world with different experience,
+opinion and ideas to share.
+
+We have adopted this code of conduct and require all contributors to agree with that to build a healthy,
+safe and productive community for all.
+
+The guideline is aimed to support a community where all people should feel safe to participate,
+introduce new ideas and inspire others, regardless of:
+
+* Age
+* Gender
+* Gender identity or expression
+* Family status
+* Marital status
+* Ability
+* Ethnicity
+* Race
+* Sex characteristics
+* Sexual identity and orientation
+* Education
+* Native language
+* Background
+* Caste
+* Religion
+* Geographic location
+* Socioeconomic status
+* Personal appearance
+* Any other dimension of diversity
+
+## Our Standards
+
+We are welcoming the following behavior:
+
+* Be respectful for different ideas, opinions and points of view
+* Be constructive and professional
+* Use inclusive language
+* Be collaborative and show the empathy
+* Focus on the best results for the community
+
+The following behavior is unacceptable:
+
+* Violence, threats of violence, or inciting others to commit self-harm
+* Personal attacks, trolling, intentionally spreading misinformation, insulting/derogatory comments
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Derogatory language
+* Encouraging unacceptable behavior
+* Other conduct which could reasonably be considered inappropriate in a professional community
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of the Code of Conduct
+and are expected to take appropriate actions in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments,
+commits, code, wiki edits, issues, and other contributions that are not aligned
+to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors
+that they deem inappropriate, threatening, offensive, or harmful.
+
+## Reporting
+
+If you believe you’re experiencing unacceptable behavior that will not be tolerated as outlined above,
+please report to `opensourcegroup@netcracker.com`. All complaints will be reviewed and investigated and will result in a response
+that is deemed necessary and appropriate to the circumstances. The project team is obligated to maintain confidentiality
+with regard to the reporter of an incident.
+
+Please also report if you observe a potentially dangerous situation, someone in distress, or violations of these guidelines,
+even if the situation is not happening to you.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..292ce26
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,12 @@
+# Contribution Guide
+
+We'd love to accept patches and contributions to this project.
+Please, follow these guidelines to make the contribution process easy and effective for everyone involved.
+
+## Contributor License Agreement
+
+You must sign the [Contributor License Agreement](https://pages.netcracker.com/cla-main.html) in order to contribute.
+
+## Code of Conduct
+
+Please make sure to read and follow the [Code of Conduct](CODE-OF-CONDUCT.md).
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..d62a6fc
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,68 @@
+FROM ubuntu:22.04
+
+USER root
+
+ENV LC_ALL=en_US.UTF-8 \
+    LANG=en_US.UTF-8
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN echo start
+RUN mkdir -p /var/lib/pgsql/data/ && mkdir -p /var/lib/pgsql/tmp_data/
+
+# fix for non-ha
+RUN mkdir /properties && touch /properties/empty-conf.conf
+
+RUN echo "deb [trusted=yes] http://apt.postgresql.org/pub/repos/apt jammy-pgdg main" >> /etc/apt/sources.list.d/pgdg.list
+RUN ls -la /etc/apt/
+RUN apt-get -y update
+RUN apt-get -o DPkg::Options::="--force-confnew" -y dist-upgrade
+
+RUN groupmod -n postgres tape
+RUN adduser -uid 26 -gid 26 postgres
+
+# Install like base image
+RUN apt-get --no-install-recommends install -y gcc-12 python3.11 python3-pip python3-dev wget
+
+RUN apt-get -y update
+RUN apt-get -o DPkg::Options::="--force-confnew" -y dist-upgrade
+RUN apt-get --no-install-recommends install -y \
+     postgresql-12 postgresql-server-dev-12 \
+     postgresql-13 postgresql-server-dev-13 \
+     postgresql-14 postgresql-server-dev-14 \
+     postgresql-15 postgresql-server-dev-15 \
+     postgresql-16 postgresql-server-dev-16 \
+     postgresql-12-pg-track-settings postgresql-12-pg-wait-sampling postgresql-12-cron postgresql-12-set-user postgresql-12-pg-stat-kcache postgresql-12-pgaudit postgresql-12-pg-qualstats postgresql-12-hypopg postgresql-12-powa \
+     postgresql-13-pg-track-settings postgresql-13-pg-wait-sampling postgresql-13-cron postgresql-13-set-user postgresql-13-pg-stat-kcache postgresql-13-pgaudit postgresql-13-pg-qualstats postgresql-13-hypopg postgresql-13-powa \
+     postgresql-14-pg-track-settings postgresql-14-pg-wait-sampling postgresql-14-cron postgresql-14-set-user postgresql-14-postgis postgresql-14-pg-stat-kcache postgresql-14-pgaudit postgresql-14-pg-qualstats postgresql-14-hypopg postgresql-14-powa postgresql-14-pg-hint-plan postgresql-14-pgnodemx postgresql-14-decoderbufs \
+     postgresql-15-pg-track-settings postgresql-15-pg-wait-sampling postgresql-15-cron postgresql-15-set-user postgresql-15-postgis postgresql-15-pg-stat-kcache postgresql-15-pgaudit postgresql-15-pg-qualstats postgresql-15-hypopg postgresql-15-powa postgresql-15-pg-hint-plan postgresql-15-pgnodemx postgresql-15-decoderbufs \
+     postgresql-16-pg-track-settings postgresql-16-pg-wait-sampling postgresql-16-cron postgresql-16-set-user postgresql-16-postgis postgresql-16-pg-stat-kcache postgresql-16-pgaudit postgresql-16-pg-qualstats postgresql-16-hypopg postgresql-16-powa postgresql-16-pg-hint-plan postgresql-16-pgnodemx postgresql-16-decoderbufs
+
+RUN apt-get --no-install-recommends install -y libproj-dev libgdal30 libgeos3.10.2 libgeotiff5 libsfcgal1
+
+RUN localedef -i en_US -f UTF-8 en_US.UTF-8 && \
+    localedef -i es_PE -f UTF-8 es_PE.UTF-8 && \
+    localedef -i es_ES -f UTF-8 es_ES.UTF-8
+# Migrate .rpm to .deb
+RUN apt-get install -y alien
+
+RUN apt-get install -y protobuf-compiler
+
+WORKDIR /tmp
+
+COPY ./docker/start.sh /start.sh
+
+
+RUN chgrp 0 /var/lib/pgsql/ && chmod g+w /var/lib/pgsql/ && chmod 777 /var/lib/pgsql && \
+    chgrp 0 /var/run/postgresql/ && chmod g+w /var/run/postgresql/ && chmod 777 /var/run/postgresql && \
+    chmod -R 777 /etc/passwd && \
+    mv /usr/bin/python3.11 /usr/bin/python && ln -fs /usr/bin/python /usr/bin/python3 && \
+    chmod +x /start.sh
+
+
+RUN pg_config --version | grep -o "[0-9]*" | head -n 1
+VOLUME /var/lib/pgsql
+VOLUME /var/run/postgresql
+
+CMD ["/bin/bash", "/start.sh"]
+
+USER 26
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 0000000..8162261
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,15 @@
+# Security Reporting Process
+
+Please, report any security issue to `opensourcegroup@netcracker.com` where the issue will be triaged appropriately.
+
+If you know of a publicly disclosed security vulnerability please IMMEDIATELY email `opensourcegroup@netcracker.com`
+to inform the team about the vulnerability, so we may start the patch, release, and communication process.
+
+# Security Release Process
+
+If the vulnerability is found in the latest stable release, then it would be fixed in patch version for that release.
+E.g., issue is found in 2.5.0 release, then 2.5.1 version with a fix will be released.
+By default, older versions will not have security releases.
+
+If the issue doesn't affect any existing public releases, the fix for medium and high issues is performed
+in a main branch before releasing a new version. For low priority issues the fix can be planned for future releases.
diff --git a/docker/start.sh b/docker/start.sh
new file mode 100755
index 0000000..7b28c19
--- /dev/null
+++ b/docker/start.sh
@@ -0,0 +1,241 @@
+#!/usr/bin/env bash
+# Copyright 2024-2025 NetCracker Technology Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+RETRIES=100
+SLEEP_BETWEEN_ITERATIONS=5
+
+[[ "${DEBUG}" == 'true' ]] && set -x
+
+function handle_master_upgrade() {
+    cd /var/lib/pgsql/data/
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] cur path: `pwd`"
+
+
+    DB_SIZE_GB_FLOAT=$(du -sk /var/lib/pgsql/data/${DATA_DIR} | awk '{ print $1 / 1024 / 1024 }')
+    DB_SIZE_GB=`printf "%.0f\n" ${DB_SIZE_GB_FLOAT}`
+    PV_SIZE_GB=$(echo "${PV_SIZE}" | tr -dc '0-9')
+
+    echo
+    echo '##########################'
+    echo "MIGRATION_PV_USED: $MIGRATION_PV_USED"
+    echo "CLEAN_MIGRATION_PV: $CLEAN_MIGRATION_PV"
+    echo "MIGRATION_PATH: $MIGRATION_PATH"
+    echo "INITDB_PARAMS: $INITDB_PARAMS"
+    echo "SIZE OF VOLUME: $PV_SIZE_GB Gb"
+    echo "SOURCE DB SIZE: $DB_SIZE_GB Gb"
+    echo "DATA_DIR: $DATA_DIR"
+    echo '##########################'
+    echo
+
+    # check if there is enough space in case when migration pv is used
+    if [[ "${MIGRATION_PV_USED}" =~ ^[Tt]rue$ ]]; then
+        echo "[$(date +%Y-%m-%dT%H:%M:%S)] Migration PV is used, check if there is enough space for migration in migration PV"
+        if [[ $DB_SIZE_GB -gt $PV_SIZE_GB ]]; then
+            echo "[$(date +%Y-%m-%dT%H:%M:%S)] DB size is more than PV size, exiting ..."
+            exit 1
+        fi
+        if [[ "${CLEAN_MIGRATION_PV}" =~ ^[Tt]rue$ ]]; then
+            echo "[$(date +%Y-%m-%dT%H:%M:%S)] CLEAN_MIGRATION_PV set to True, All data from MIGRATION PV will be deleted! "
+            rm -rf /var/lib/pgsql/tmp_data/*
+        fi
+    else
+        echo "[$(date +%Y-%m-%dT%H:%M:%S)] Migration PV is NOT used, check if there is enough space for migration in master PV"
+        DOUBLE_DB_SIZE="$((${DB_SIZE_GB} * 2))"
+        if [[ ${DOUBLE_DB_SIZE} -gt ${PV_SIZE_GB} ]]; then
+            echo "[$(date +%Y-%m-%dT%H:%M:%S)] DB size is more than PV size, exiting ..."
+            exit 1
+        fi
+    fi
+    export PATH="/usr/lib/postgresql/${PG_VERSION_TARGET}/bin:${PATH}"
+
+    [ -d "$MIGRATION_PATH/tmp/pg" ] && echo "[$(date +%Y-%m-%dT%H:%M:%S)] Prev upgrade dir exists, removing .." && rm -rf "$MIGRATION_PATH/tmp/pg"
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] initializing target db with parameters $INITDB_PARAMS"
+    /usr/lib/postgresql/"${PG_VERSION_TARGET}"/bin/initdb ${INITDB_PARAMS} --pgdata="$MIGRATION_PATH/tmp/pg"
+
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] initialize complete, copying configs"
+    mkdir "/tmp/configs/"
+    cp /var/lib/pgsql/data/${DATA_DIR}/*.conf "/tmp/configs/"
+
+    echo "turning off wal archiving"
+    sed -e '/archive_command/ s/^#*/#/' -i "$MIGRATION_PATH/tmp/pg/postgresql.conf"
+    sed -e '/archive_mode/ s/^#*/#/' -i "$MIGRATION_PATH/tmp/pg/postgresql.conf"
+    sed -e '/ssl/ s/^#*/#/' -i "$MIGRATION_PATH/tmp/pg/postgresql.conf"
+    sed -e '/archive_command/ s/^#*/#/' -i "/var/lib/pgsql/data/${DATA_DIR}/postgresql.conf"
+    sed -e '/archive_mode/ s/^#*/#/' -i "/var/lib/pgsql/data/${DATA_DIR}/postgresql.conf"
+    sed -e '/ssl/ s/^#*/#/' -i "/var/lib/pgsql/data/${DATA_DIR}/postgresql.conf"
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] proceed with upgrade"
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] Content of /tmp/configs:"
+    ls -la /tmp/configs/
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] Content of /tmp/configs/postgresql.conf file:"
+    cat /tmp/configs/postgresql.conf
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] making chmod 750 to datadir"
+
+    chmod 750 $MIGRATION_PATH/${DATA_DIR}
+
+    cat "/var/lib/pgsql/data/${DATA_DIR}/postgresql.conf" | grep shared_preload_libraries >> $MIGRATION_PATH/tmp/pg/postgresql.conf
+
+    ls -la $MIGRATION_PATH
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] Check cluster before upgrade"
+      /usr/lib/postgresql/"${PG_VERSION_TARGET}"/bin/pg_upgrade \
+      --old-datadir "/var/lib/pgsql/data/${DATA_DIR}" \
+      --new-datadir "$MIGRATION_PATH/tmp/pg" \
+      --old-bindir  "/usr/lib/postgresql/${PG_VERSION}/bin" \
+      --new-bindir  "/usr/lib/postgresql/${PG_VERSION_TARGET}/bin" \
+      --check \
+      > /var/lib/pgsql/data/check_result
+
+    CHECK_CODE=$?
+
+    if [[ "CHECK_CODE" -ne 0 ]]; then
+        echo "[$(date +%Y-%m-%dT%H:%M:%S)] Check cluster before upgrade - Failed."
+        echo "check exit code: ${CHECK_CODE}"
+        cat /var/lib/pgsql/data/check_result
+        exit 13
+    fi
+
+    if [[ "$OPERATOR" =~ ^[Tt]rue$ ]]; then
+      echo "[$(date +%Y-%m-%dT%H:%M:%S)] using link parameter"
+      /usr/lib/postgresql/"${PG_VERSION_TARGET}"/bin/pg_upgrade \
+      --link \
+      --old-datadir "/var/lib/pgsql/data/${DATA_DIR}" \
+      --new-datadir "$MIGRATION_PATH/tmp/pg" \
+      --old-bindir  "/usr/lib/postgresql/${PG_VERSION}/bin" \
+      --new-bindir  "/usr/lib/postgresql/${PG_VERSION_TARGET}/bin"
+    else
+      /usr/lib/postgresql/"${PG_VERSION_TARGET}"/bin/pg_upgrade \
+      --old-datadir "/var/lib/pgsql/data/${DATA_DIR}" \
+      --new-datadir "$MIGRATION_PATH/tmp/pg" \
+      --old-bindir  "/usr/lib/postgresql/${PG_VERSION}/bin" \
+      --new-bindir  "/usr/lib/postgresql/${PG_VERSION_TARGET}/bin"
+    fi
+
+    EXIT_CODE=$?
+    if [[ "$EXIT_CODE" -ne 0 ]]; then
+        echo "[$(date +%Y-%m-%dT%H:%M:%S)] Error! Can not proceed, because upgrade failed, exiting"
+        ls -al /var/lib/pgsql/data
+        echo "[$(date +%Y-%m-%dT%H:%M:%S)] Printing all of the logs:"
+        awk '{print}' /var/lib/pgsql/data/*.log
+#        cat pg_upgrade_server.log
+        exit 1
+    fi
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] Upgrade Successful"
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] Sizing After Upgrade"
+    du -sh /var/lib/pgsql/data/
+
+    rm -rf "/var/lib/pgsql/data/${DATA_DIR}"
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] moving new data to directory"
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] from -> $MIGRATION_PATH/tmp/pg"
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] to -> /var/lib/pgsql/data/${DATA_DIR}"
+    mv "$MIGRATION_PATH/tmp/pg" "/var/lib/pgsql/data/${DATA_DIR}"
+
+    /usr/lib/postgresql/"${PG_VERSION_TARGET}"/bin/pg_ctl start -D "/var/lib/pgsql/data/${DATA_DIR}"
+
+    until psql -c "select 1" > /dev/null 2>&1 || [ $RETRIES -eq 0 ]; do
+      echo "[$(date +%Y-%m-%dT%H:%M:%S)] Waiting for postgres server, $((RETRIES--)) remaining attempts..."
+      sleep ${SLEEP_BETWEEN_ITERATIONS}
+    done
+
+    EXIT_CODE=$?
+    if [[ "$EXIT_CODE" -ne 0 ]]; then
+        echo "[$(date +%Y-%m-%dT%H:%M:%S)] Error! Can not proceed, because select failed, exiting"
+        cat pg_upgrade_server.log
+        exit 1
+    fi
+
+    /usr/lib/postgresql/"${PG_VERSION_TARGET}"/bin/psql -c "DROP ROLE IF EXISTS replicator; CREATE ROLE replicator with replication login password '$PGREPLPASSWORD';"
+    /usr/lib/postgresql/"${PG_VERSION_TARGET}"/bin/psql -c "ALTER ROLE postgres with password '$PGPASSWORD';"
+
+    # update extensions
+    [ -f /var/lib/pgsql/data/update_extensions.sql ] && psql --username=postgres --file=/var/lib/pgsql/data/update_extensions.sql postgres
+
+    /usr/lib/postgresql/"${PG_VERSION_TARGET}"/bin/pg_ctl stop -D "/var/lib/pgsql/data/${DATA_DIR}"
+
+    [ -f /var/lib/pgsql/data/target_version ] && rm -rf /var/lib/pgsql/data/target_version
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] moving configs to directory"
+    mv /tmp/configs/* "/var/lib/pgsql/data/${DATA_DIR}/"
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] exiting"
+}
+
+function handle_replica_upgrade() {
+    rm -rf "/var/lib/pgsql/data/${DATA_DIR}/*"
+}
+
+# restricted scc
+function check_user(){
+    cur_user=$(id -u)
+    if [[ "$cur_user" != "26" ]]
+    then
+        echo "[$(date +%Y-%m-%dT%H:%M:%S)] starting as not postgres user"
+        set -e
+
+        echo "[$(date +%Y-%m-%dT%H:%M:%S)] Adding randomly generated uid to passwd file..."
+
+        sed -i '/postgres/d' /etc/passwd
+
+        if ! whoami &> /dev/null; then
+          if [[ -w /etc/passwd ]]; then
+            export USER_ID=$(id -u)
+            export GROUP_ID=$(id -g)
+            echo "postgres:x:${USER_ID}:${GROUP_ID}:PostgreSQL Server:${PGDATA}:/bin/bash" >> /etc/passwd
+            echo "UID added ..."
+          fi
+        fi
+
+    fi
+}
+
+function check_pgsql_version(){
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] => Check Source And Target PGSQL version"
+    # get version of data files
+    PG_VERSION=$(head -n 1 "/var/lib/pgsql/data/${DATA_DIR}/PG_VERSION")
+
+    if python -c "import sys; sys.exit(0 if 11.0 <= float("${PG_VERSION}") < 12.0 else 1)"; then
+        PG_VERSION_TARGET="12"
+    elif python -c "import sys; sys.exit(0 if 10.0 <= float("${PG_VERSION}") < 11.0 else 1)"; then
+        PG_VERSION_TARGET="11"
+    else
+        PG_VERSION_TARGET="10"
+    fi
+
+    for i in {1..10}; do
+      echo "[$(date +%Y-%m-%dT%H:%M:%S)] Will try to find target_version file"
+      [ -f /var/lib/pgsql/data/target_version ] && echo "Target file found, will use version from this file" && \
+        PG_VERSION_TARGET=`cat /var/lib/pgsql/data/target_version` && break
+      sleep 1
+    done
+
+    echo "[$(date +%Y-%m-%dT%H:%M:%S)] Target version of PostgreSQL is $PG_VERSION_TARGET"
+}
+
+check_user
+
+check_pgsql_version
+
+if [[ "${TYPE}" == "master" ]]; then
+    handle_master_upgrade
+elif [[ "${TYPE}" == "replica" ]]; then
+    handle_replica_upgrade
+fi
+
+exit 0