docker: rootless image (#10154)

* docker: rootless image

* improve docs + remove check for write perm on custom

* add more info on ssh passtrough

* Add comment for internal ssh server in container config

3 files changed, 117 insertions, 0 deletions

diff --git a/docker/rootless/etc/templates/app.ini b/docker/rootless/etc/templates/app.ini
new file mode 100644
index 0000000000..e8a89cd27a
--- /dev/null
+++ b/docker/rootless/etc/templates/app.ini
@@ -0,0 +1,58 @@
+APP_NAME = $APP_NAME
+RUN_USER = $RUN_USER
+RUN_MODE = $RUN_MODE
+
+[repository]
+ROOT = $GITEA_WORK_DIR/git/repositories
+
+[repository.local]
+LOCAL_COPY_PATH = $GITEA_TEMP/local-repo
+
+[repository.upload]
+TEMP_PATH = $GITEA_TEMP/uploads
+
+[server]
+APP_DATA_PATH = $GITEA_WORK_DIR
+SSH_DOMAIN       = $SSH_DOMAIN
+HTTP_PORT        = $HTTP_PORT
+ROOT_URL         = $ROOT_URL
+DISABLE_SSH      = $DISABLE_SSH
+; In rootless gitea container only internal ssh server is supported
+START_SSH_SERVER = true
+SSH_PORT         = $SSH_PORT
+SSH_LISTEN_PORT  = $SSH_LISTEN_PORT
+BUILTIN_SSH_SERVER_USER = $RUN_USER
+LFS_START_SERVER = $LFS_START_SERVER
+LFS_CONTENT_PATH = $GITEA_WORK_DIR/git/lfs
+
+[database]
+PATH = $GITEA_WORK_DIR/data/gitea.db
+DB_TYPE = $DB_TYPE
+HOST    = $DB_HOST
+NAME    = $DB_NAME
+USER    = $DB_USER
+PASSWD  = $DB_PASSWD
+
+[indexer]
+ISSUE_INDEXER_PATH = $GITEA_WORK_DIR/data/indexers/issues.bleve
+
+[session]
+PROVIDER_CONFIG = $GITEA_WORK_DIR/data/sessions
+
+[picture]
+AVATAR_UPLOAD_PATH = $GITEA_WORK_DIR/data/avatars
+REPOSITORY_AVATAR_UPLOAD_PATH = $GITEA_WORK_DIR/data/gitea/repo-avatars
+
+[attachment]
+PATH = $GITEA_WORK_DIR/data/attachments
+
+[log]
+ROOT_PATH = $GITEA_WORK_DIR/data/log
+
+[security]
+INSTALL_LOCK = $INSTALL_LOCK
+SECRET_KEY   = $SECRET_KEY
+
+[service]
+DISABLE_REGISTRATION = $DISABLE_REGISTRATION
+REQUIRE_SIGNIN_VIEW  = $REQUIRE_SIGNIN_VIEW
diff --git a/docker/rootless/usr/local/bin/docker-entrypoint.sh b/docker/rootless/usr/local/bin/docker-entrypoint.sh
new file mode 100755
index 0000000000..d05777adc5
--- /dev/null
+++ b/docker/rootless/usr/local/bin/docker-entrypoint.sh
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+if [ -x /usr/local/bin/docker-setup.sh ]; then
+    /usr/local/bin/docker-setup.sh || { echo 'docker setup failed' ; exit 1; }
+fi
+
+if [ $# -gt 0 ]; then
+    exec "$@"
+else
+    exec /usr/local/bin/gitea -c ${GITEA_APP_INI} web
+fi
diff --git a/docker/rootless/usr/local/bin/docker-setup.sh b/docker/rootless/usr/local/bin/docker-setup.sh
new file mode 100755
index 0000000000..1ee8c2c97f
--- /dev/null
+++ b/docker/rootless/usr/local/bin/docker-setup.sh
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Prepare git folder
+mkdir -p ${HOME} && chmod 0700 ${HOME}
+if [ ! -w ${HOME} ]; then echo "${HOME} is not writable"; exit 1; fi
+
+# Prepare custom folder
+mkdir -p ${GITEA_CUSTOM} && chmod 0500 ${GITEA_CUSTOM}
+
+# Prepare temp folder
+mkdir -p ${GITEA_TEMP} && chmod 0700 ${GITEA_TEMP}
+if [ ! -w ${GITEA_TEMP} ]; then echo "${GITEA_TEMP} is not writable"; exit 1; fi
+
+#Prepare config file
+if [ ! -f ${GITEA_APP_INI} ]; then
+
+    #Prepare config file folder
+    GITEA_APP_INI_DIR=$(dirname ${GITEA_APP_INI})
+    mkdir -p ${GITEA_APP_INI_DIR} && chmod 0700 ${GITEA_APP_INI_DIR}
+    if [ ! -w ${GITEA_APP_INI_DIR} ]; then echo "${GITEA_APP_INI_DIR} is not writable"; exit 1; fi
+
+    # Set INSTALL_LOCK to true only if SECRET_KEY is not empty and
+    # INSTALL_LOCK is empty
+    if [ -n "$SECRET_KEY" ] && [ -z "$INSTALL_LOCK" ]; then
+        INSTALL_LOCK=true
+    fi
+
+    # Substitude the environment variables in the template
+    APP_NAME=${APP_NAME:-"Gitea: Git with a cup of tea"} \
+    RUN_MODE=${RUN_MODE:-"dev"} \
+    RUN_USER=${USER:-"git"} \
+    SSH_DOMAIN=${SSH_DOMAIN:-"localhost"} \
+    HTTP_PORT=${HTTP_PORT:-"3000"} \
+    ROOT_URL=${ROOT_URL:-""} \
+    DISABLE_SSH=${DISABLE_SSH:-"false"} \
+    SSH_PORT=${SSH_PORT:-"2222"} \
+    SSH_LISTEN_PORT=${SSH_LISTEN_PORT:-$SSH_PORT} \
+    DB_TYPE=${DB_TYPE:-"sqlite3"} \
+    DB_HOST=${DB_HOST:-"localhost:3306"} \
+    DB_NAME=${DB_NAME:-"gitea"} \
+    DB_USER=${DB_USER:-"root"} \
+    DB_PASSWD=${DB_PASSWD:-""} \
+    INSTALL_LOCK=${INSTALL_LOCK:-"false"} \
+    DISABLE_REGISTRATION=${DISABLE_REGISTRATION:-"false"} \
+    REQUIRE_SIGNIN_VIEW=${REQUIRE_SIGNIN_VIEW:-"false"} \
+    SECRET_KEY=${SECRET_KEY:-""} \
+    envsubst < /etc/templates/app.ini > ${GITEA_APP_INI}
+fi