Add Wazuh indexer cluster configuration

wazuh-indexer/config/entrypoint_OS.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+set -e
+
+# Files created by Elasticsearch should always be group writable too
+umask 0002
+
+export USER=wazuh-indexer
+export INSTALLATION_DIR=/usr/share/wazuh-indexer
+export OPENSEARCH_PATH_CONF=/etc/wazuh-indexer
+export JAVA_HOME=${INSTALLATION_DIR}/jdk
+export FILE=${INSTALLATION_DIR}/start
+
+run_as_other_user_if_needed() {
+  if [[ "$(id -u)" == "0" ]]; then
+    # If running as root, drop to specified UID and run command
+    exec chroot --userspec=1000:0 / "${@}"
+  else
+    # Either we are running in Openshift with random uid and are a member of the root group
+    # or with a custom --user
+    exec "${@}"
+  fi
+}
+
+# Allow user specify custom CMD, maybe bin/opensearch itself
+# for example to directly specify `-E` style parameters for opensearch on k8s
+# or simply to run /bin/bash to check the image
+if [[ "$1" != "opensearchwrapper" ]]; then
+  if [[ "$(id -u)" == "0" && $(basename "$1") == "opensearch" ]]; then
+    # centos:7 chroot doesn't have the `--skip-chdir` option and
+    # changes our CWD.
+    # Rewrite CMD args to replace $1 with `opensearch` explicitly,
+    # so that we are backwards compatible with the docs
+    # from the previous Elasticsearch versions<6
+    # and configuration option D:
+    # https://www.elastic.co/guide/en/elasticsearch/reference/5.6/docker.html#_d_override_the_image_8217_s_default_ulink_url_https_docs_docker_com_engine_reference_run_cmd_default_command_or_options_cmd_ulink
+    # Without this, user could specify `opensearch -E x.y=z` but
+    # `bin/opensearch -E x.y=z` would not work.
+    set -- "opensearch" "${@:2}"
+    # Use chroot to switch to UID 1000 / GID 0
+    exec chroot --userspec=1000:0 / "$@"
+  else
+    # User probably wants to run something else, like /bin/bash, with another uid forced (Openshift?)
+    exec "$@"
+  fi
+fi
+
+# Allow environment variables to be set by creating a file with the
+# contents, and setting an environment variable with the suffix _FILE to
+# point to it. This can be used to provide secrets to a container, without
+# the values being specified explicitly when running the container.
+#
+# This is also sourced in opensearch-env, and is only needed here
+# as well because we use ELASTIC_PASSWORD below. Sourcing this script
+# is idempotent.
+source /usr/share/wazuh-indexer/bin/opensearch-env-from-file
+
+if [[ -f bin/opensearch-users ]]; then
+  # Check for the ELASTIC_PASSWORD environment variable to set the
+  # bootstrap password for Security.
+  #
+  # This is only required for the first node in a cluster with Security
+  # enabled, but we have no way of knowing which node we are yet. We'll just
+  # honor the variable if it's present.
+  if [[ -n "$ELASTIC_PASSWORD" ]]; then
+    [[ -f /usr/share/wazuh-indexer/config/opensearch.keystore ]] || (run_as_other_user_if_needed opensearch-keystore create)
+    if ! (run_as_other_user_if_needed opensearch-keystore has-passwd --silent) ; then
+      # keystore is unencrypted
+      if ! (run_as_other_user_if_needed opensearch-keystore list | grep -q '^bootstrap.password$'); then
+        (run_as_other_user_if_needed echo "$ELASTIC_PASSWORD" | opensearch-keystore add -x 'bootstrap.password')
+      fi
+    else
+      # keystore requires password
+      if ! (run_as_other_user_if_needed echo "$KEYSTORE_PASSWORD" \
+          | opensearch-keystore list | grep -q '^bootstrap.password$') ; then
+        COMMANDS="$(printf "%s\n%s" "$KEYSTORE_PASSWORD" "$ELASTIC_PASSWORD")"
+        (run_as_other_user_if_needed echo "$COMMANDS" | opensearch-keystore add -x 'bootstrap.password')
+      fi
+    fi
+  fi
+fi
+
+if [[ "$(id -u)" == "0" ]]; then
+  # If requested and running as root, mutate the ownership of bind-mounts
+  if [[ -n "$TAKE_FILE_OWNERSHIP" ]]; then
+    chown -R 1000:0 /usr/share/wazuh-indexer/{data,logs}
+  fi
+fi
+
+run_as_other_user_if_needed /usr/share/wazuh-indexer/bin/opensearch <<<"$KEYSTORE_PASSWORD"