Red Hat Linux install: error: error parsing template

Modified on Tue, 30 May, 2023 at 10:19 PM

During the installation of Direktiv on Red Hat Enterprise Linux the following error occurs:

error: error parsing template {{ index .data \"host\" }}, template: output:1: unexpected "\\" in operand
error: error parsing template {{ index .data \"port\" }}, template: output:1: unexpected "\\" in operand
error: error parsing template {{ index .data \"user\" }}, template: output:1: unexpected "\\" in operand
error: error parsing template {{ index .data \"password\" }}, template: output:1: unexpected "\\" in operand
error: error parsing template {{ index .data \"dbname\" }}, template: output:1: unexpected "\\" in operand

This is due to a difference between the Ubuntu and Red Hat shell escape variables. The fix is very easy. The following 2 files need to be modified:

~/install/04_keycloak/install.sh
~/install/06_direktiv/install.sh

The content of the files should look like this.

~/install/04_keycloak/install.sh:

#!/bin/sh

while ! kubectl get secrets -n postgres direktivdb-pguser-keycloak
do
  echo "postgres not ready, waiting..."
  sleep 5
done


if [ ! -n "${DIREKTIV_HOST+1}" ]; then
    echo "DIREKTIV_HOST not set to hostname to use"
    exit 1
fi 

tee env.yaml <<EOF
extraEnvVars:
  - name: KC_HOSTNAME_PATH
    value: "/auth/"
  - name: KC_HOSTNAME_STRICT
    value: "false"
  - name: KC_HOSTNAME_ADMIN_URL
    value: "https://${DIREKTIV_HOST}/auth"
  - name: KC_HOSTNAME_URL
    value: "https://${DIREKTIV_HOST}/auth"
  - name: KEYCLOAK_EXTRA_ARGS
    value: "-Dkeycloak.import=/tmp/config/direktiv.json"
  - name: KEYCLOAK_PRODUCTION
    value: "true"
  - name: KC_LOG_LEVEL
    value: "DEBUG"
EOF

tee db.yaml <<EOF
externalDatabase:
  host: `kubectl get secrets -n postgres direktivdb-pguser-keycloak -o go-template='{{ index .data "host" }}' | base64 -d`
  port: `kubectl get secrets -n postgres direktivdb-pguser-keycloak -o go-template='{{ index .data "port" }}' | base64 -d`
  user: `kubectl get secrets -n postgres direktivdb-pguser-keycloak -o go-template='{{ index .data "user" }}' | base64 -d`
  password: "`kubectl get secrets -n postgres direktivdb-pguser-keycloak -o go-template='{{ index .data "password" }}' | base64 -d`"
  database: `kubectl get secrets -n postgres direktivdb-pguser-keycloak -o go-template='{{ index .data "dbname" }}' | base64 -d`
EOF

kubectl create ns keycloak
kubectl annotate ns keycloak linkerd.io/inject=enabled

secret=`< /dev/urandom tr -dc A-Z-a-z-0-9 | head -c${1:-32};echo;`
echo $secret > kc_secret.txt

helm install --set-file tlskey=certs/server.key --set-file tlscert=certs/server.crt \
  --set host=${DIREKTIV_HOST} --set clientsecret=${secret} -n keycloak keycloak-dep keycloak-dep || exit 1

helm install -f db.yaml -f env.yaml -f keycloak.yaml -n keycloak --version 13.1.0 keycloak bitnami/keycloak || exit 1

~/install/06_direktiv/install.sh:

#!/bin/sh

while ! kubectl get secrets -n postgres direktivdb-pguser-direktiv
do
  echo "postgres not ready, waiting..."
  sleep 5
done  

if [ ! -n "${DIREKTIV_HOST+1}" ]; then
    echo "DIREKTIV_HOST not set to hostname to use"
    exit 1
fi 

install=direktiv-dev.yaml

if [ ! -n "${DIREKTIV_DEV+1}" ]; then
   install=direktiv.yaml
fi 

tee hostname.yaml <<EOF
ingress:
  host: ${DIREKTIV_HOST}
EOF

adminToken="password"
if [ ! -n "${DIREKTIV_TOKEN+1}" ]; then
   adminToken=`< /dev/urandom tr -dc A-Z-a-z-0-9 | head -c${1:-32};echo;`
fi 

kubectl annotate ns default linkerd.io/inject=enabled

echo ${adminToken} > adminToken.txt

kcsecret=$(head -n 1 ../04_keycloak/kc_secret.txt)

helm install --set host=${DIREKTIV_HOST} --set secret=${kcsecret} --set adminsecret=${adminToken} direktiv-dep direktiv-dep

tee db.yaml <<EOF
database:
  host: `kubectl get secrets -n postgres direktivdb-pguser-direktiv -o go-template='{{ index .data "host" }}' | base64 -d`
  port: `kubectl get secrets -n postgres direktivdb-pguser-direktiv -o go-template='{{ index .data "port" }}' | base64 -d`
  user: `kubectl get secrets -n postgres direktivdb-pguser-direktiv -o go-template='{{ index .data "user" }}' | base64 -d`
  password: "`kubectl get secrets -n postgres direktivdb-pguser-direktiv -o go-template='{{ index .data "password" }}' | base64 -d`"
  database: `kubectl get secrets -n postgres direktivdb-pguser-direktiv -o go-template='{{ index .data "dbname" }}' | base64 -d`
EOF

helm install -f hostname.yaml -f db.yaml --set ingress.enabled=false  --set ingress-nginx.install=false -f ${install} direktiv direktiv/direktiv
 
kubectl delete ns contour-external || true