1 files changed, 51 insertions, 0 deletions
diff --git a/images/installer/root/usr/local/bin/entrypoint-gcp b/images/installer/root/usr/local/bin/entrypoint-gcp
new file mode 100755
index 000000000..d0ffd9904
--- /dev/null
+++ b/images/installer/root/usr/local/bin/entrypoint-gcp
@@ -0,0 +1,51 @@
+#!/bin/bash
+#
+# This file sets up the user to run in the GCP environment.
+# It provides dynamic inventory that works well when run in
+# a container environment by setting up a default inventory.
+# It assumes the user has provided a GCP service account token
+# and ssh-privatekey file at "$(pwd)/inventory/dynamic/injected"
+# and automatically links any YAML files found into the group
+# vars directory, which allows the playbook to more easily be
+# run in containerized contexts.
+
+WORK=$(pwd)
+FILES="${WORK}/inventory/dynamic/injected"
+
+# Patch /etc/passwd file with the current user info.
+# The current user's entry must be correctly defined in this file in order for
+# the `ssh` command to work within the created container.
+
+if ! whoami &>/dev/null; then
+  echo "${USER:-default}:x:$(id -u):$(id -g):Default User:$HOME:/sbin/nologin" >> /etc/passwd
+fi
+
+# Provide a "files_dir" variable that points to inventory/dynamic/injected
+echo "files_dir: \"${FILES}\"" > "${WORK}/inventory/dynamic/gcp/group_vars/all/00_default_files_dir.yml"
+# Add any injected variable files into the group vars directory
+find "${FILES}" -name '*.yml' -or -name '*.yaml' -or -name vars | xargs -L1 -I {} ln -fs {} "${WORK}/inventory/dynamic/gcp/group_vars/all"
+# Avoid sudo when running locally - nothing in the image requires it.
+mkdir -p "${WORK}/inventory/dynamic/gcp/host_vars/localhost"
+echo "ansible_become: no" > "${WORK}/inventory/dynamic/gcp/host_vars/localhost/00_skip_root.yaml"
+
+if [[ -z "${ANSIBLE_CONFIG-}" ]]; then
+  export ANSIBLE_CONFIG="${WORK}/inventory/dynamic/gcp/ansible.cfg"
+fi
+
+# SSH requires the file to be owned by the current user, but Docker copies
+# files in as root. Put the file into the ssh dir with the right permissions
+if [[ -f "${FILES}/ssh-privatekey" ]]; then
+  keyfile="${HOME}/.ssh/google_compute_engine"
+  mkdir "${HOME}/.ssh"
+  rm -f "${keyfile}"
+  cat "${FILES}/ssh-privatekey" > "${keyfile}"
+  chmod 0600 "${keyfile}"
+  ssh-keygen -y -f "${keyfile}" >  "${keyfile}.pub"
+fi
+if [[ -f "${FILES}/gce.json" ]]; then
+  gcloud auth activate-service-account --key-file="${FILES}/gce.json"
+else
+  echo "No service account file found at ${FILES}/gce.json, bypassing login"
+fi
+
+exec "$@"
+\ No newline at end of file