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usr
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share
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elasticsearch
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bin
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files >> //usr/share/elasticsearch/bin/elasticsearch-env-from-file
#!/bin/bash set -e -o pipefail # 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. # # Note that only supported environment variables are processed, in order # to avoid unexpected failures when an environment sets a "*_FILE" variable # that doesn't contain a filename. # # This script is intended to be sourced, not executed, and modifies the # environment. for VAR_NAME_FILE in ELASTIC_PASSWORD_FILE KEYSTORE_PASSWORD_FILE ; do if [[ -n "${!VAR_NAME_FILE}" ]]; then VAR_NAME="${VAR_NAME_FILE%_FILE}" if env | grep "^${VAR_NAME}="; then echo "ERROR: Both $VAR_NAME_FILE and $VAR_NAME are set. These are mutually exclusive." >&2 exit 1 fi if [[ ! -e "${!VAR_NAME_FILE}" ]]; then echo "ERROR: File ${!VAR_NAME_FILE} from $VAR_NAME_FILE does not exist" >&2 exit 1 fi FILE_PERMS="$(stat -L -c '%a' ${!VAR_NAME_FILE})" if [[ "$FILE_PERMS" != "400" && "$FILE_PERMS" != "600" ]]; then if [[ -h "${!VAR_NAME_FILE}" ]]; then echo "ERROR: File $(readlink "${!VAR_NAME_FILE}") (target of symlink ${!VAR_NAME_FILE} from $VAR_NAME_FILE) must have file permissions 400 or 600, but actually has: $FILE_PERMS" >&2 else echo "ERROR: File ${!VAR_NAME_FILE} from $VAR_NAME_FILE must have file permissions 400 or 600, but actually has: $FILE_PERMS" >&2 fi exit 1 fi echo "Setting $VAR_NAME from $VAR_NAME_FILE at ${!VAR_NAME_FILE}" >&2 export "$VAR_NAME"="$(cat ${!VAR_NAME_FILE})" unset VAR_NAME # Unset the suffixed environment variable unset "$VAR_NAME_FILE" fi done
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