[mod] migrate from Redis to Valkey (#4795)

This patch migrates from `redis==5.2.1` [1] to `valkey==6.1.0` [2].

The migration to valkey is necessary because the company behind Redis has decided
to abandon the open source license. After experiencing a drop in user numbers,
they now want to run it under a dual license again. But this move demonstrates
once again how unreliable the company is and how it treats open source
developers.

To review first, read the docs::

    $ make docs.live

Follow the instructions to remove redis:

- http://0.0.0.0:8000/admin/settings/settings_redis.html

Config and install a local valkey DB:

- http://0.0.0.0:8000/admin/settings/settings_valkey.html

[1] https://pypi.org/project/redis/
[2] https://pypi.org/project/valkey/

Co-authored-by: HLFH <gaspard@dhautefeuille.eu>
Co-authored-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 73 insertions, 0 deletions

diff --git a/utils/lib_valkey.sh b/utils/lib_valkey.sh
new file mode 100755
index 000000000..7e7beb948
--- /dev/null
+++ b/utils/lib_valkey.sh
@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+valkey.distro.setup() {
+    # shellcheck disable=SC2034
+
+    case $DIST_ID in
+        ubuntu|debian)
+            VALKEY_PACKAGES="valkey-server"
+            ;;
+        arch|fedora|centos)
+            VALKEY_PACKAGES="valkey"
+            ;;
+        *)
+            err_msg "$DIST_ID: valkey not yet implemented"
+            ;;
+    esac
+}
+
+valkey.backports() {
+
+    case $DIST_ID in
+        debian)
+            info_msg "APT:: install debian-stable-backports.source / ${DIST_ID}-${DIST_VERS} (${DIST_VERSION_CODENAME})"
+            install_template /etc/apt/sources.list.d/debian-stable-backports.sources
+            apt update
+            ;;
+        ubuntu)
+            info_msg "APT:: install ubuntu-stable-backports.source / ${DIST_ID}-${DIST_VERS} (${DIST_VERSION_CODENAME})"
+            install_template /etc/apt/sources.list.d/ubuntu-stable-backports.sources
+            apt update
+            ;;
+        *)
+            info_msg "APT:: valkey.backports no implementation / ${DIST_ID}-${DIST_VERS} (${DIST_VERSION_CODENAME})"
+            ;;
+    esac
+}
+
+valkey.install(){
+    info_msg "installing valkey ..."
+    valkey.distro.setup
+
+    case $DIST_ID in
+        debian|ubuntu)
+            apt-cache show "${VALKEY_PACKAGES}" &> /dev/null  || valkey.backports
+            pkg_install "${VALKEY_PACKAGES}"
+
+            # do some fix ...
+            # chown -R valkey:valkey /var/log/valkey/ /var/lib/valkey/ /etc/valkey/
+
+            # https://www.freedesktop.org/software/systemd/man/latest/systemd.exec.html#PrivateUsers=
+            sed -i 's/PrivateUsers=true/# PrivateUsers=true/' /lib/systemd/system/valkey-server.service
+            sed -i 's/PrivateUsers=true/# PrivateUsers=true/' /lib/systemd/system/valkey-server@.service
+
+            systemd_activate_service valkey-server
+            ;;
+        arch|fedora|centos)
+            pkg_install "${VALKEY_PACKAGES}"
+            systemd_activate_service valkey
+            ;;
+        *)
+            # install backports if package is not in the current APT repos
+            pkg_install "${VALKEY_PACKAGES}"
+            ;;
+    esac
+
+    # case $DIST_ID-$DIST_VERS in
+    #     arch-*|fedora-*|centos-7)
+    #         systemctl enable nginx
+    #         systemctl start nginx
+    #         ;;
+    # esac
+}