Error in using persistent data store with COMPOSER REST SERVER - hyperledger-composer

Question

I tried to setup a persistent data store for REST server but was unable to do it.I am posting the steps which I have followed to do it.
Steps which I followed to set a persistent data store for REST server.
Started an instance of MongoDB:
root#ubuntu:~# docker run -d --name mongo --network composer_default -p 27017:27017 mongo
dda3340e4daf7b36a244c5f30772f50a4ee1e8f81cc7fc5035f1090cdcf46c58
Created a new, empty directory. Created a new file named Dockerfile the new directory, with the following contents:
FROM hyperledger/composer-rest-server
RUN npm install --production loopback-connector-mongodb passport-github && \
npm cache clean && \
ln -s node_modules .node_modules
Changed into the directory created in step 2, and build the Docker image:
root#ubuntu:~# cd examples/dir/
root#ubuntu:~/examples/dir# ls
Dockerfile ennvars.txt
root#ubuntu:~/examples/dir# docker build -t myorg/my-composer-rest-server .
Sending build context to Docker daemon 4.096 kB
Step 1/2 : FROM hyperledger/composer-rest-server
---> 77cd6a591726
Step 2/2 : RUN npm install --production loopback-connector-couch passport-github && npm cache clean && ln -s node_modules .node_modules
---> Using cache
---> 2ff9537656d1
Successfully built 2ff9537656d1
root#ubuntu:~/examples/dir#
Created file named ennvars.txt in the same directory.
The contents are as follows:
COMPOSER_CONNECTION_PROFILE=hlfv1
COMPOSER_BUSINESS_NETWORK=blockchainv5
COMPOSER_ENROLLMENT_ID=admin
COMPOSER_ENROLLMENT_SECRET=adminpw
COMPOSER_NAMESPACES=never
COMPOSER_SECURITY=true
COMPOSER_CONFIG='{
"type": "hlfv1",
"orderers": [
{
"url": "grpc://localhost:7050"
}
],
"ca": {
"url": "http://localhost:7054",
"name": "ca.example.com"
},
"peers": [
{
"requestURL": "grpc://localhost:7051",
"eventURL": "grpc://localhost:7053"
}
],
"keyValStore": "/home/ubuntu/.hfc-key-store",
"channel": "mychannel",
"mspID": "Org1MSP",
"timeout": "300"
}'
COMPOSER_DATASOURCES='{
"db": {
"name": "db",
"connector": "mongodb",
"host": "mongo"
}
}'
COMPOSER_PROVIDERS='{
"github": {
"provider": "github",
"module": "passport-github",
"clientID": "a88810855b2bf5d62f97",
"clientSecret": "f63e3c3c65229dc51f1c8964b05e9717bf246279",
"authPath": "/auth/github",
"callbackURL": "/auth/github/callback",
"successRedirect": "/",
"failureRedirect": "/"
}
}'
Loaded the env variables by the following command.
root#ubuntu:~/examples/dir# source ennvars.txt
Started the docker container by the below command
root#ubuntu:~/examples/dir# docker run \
-d \
-e COMPOSER_CONNECTION_PROFILE=${COMPOSER_CONNECTION_PROFILE} \
-e COMPOSER_BUSINESS_NETWORK=${COMPOSER_BUSINESS_NETWORK} \
-e COMPOSER_ENROLLMENT_ID=${COMPOSER_ENROLLMENT_ID} \
-e COMPOSER_ENROLLMENT_SECRET=${COMPOSER_ENROLLMENT_SECRET} \
-e COMPOSER_NAMESPACES=${COMPOSER_NAMESPACES} \
-e COMPOSER_SECURITY=${COMPOSER_SECURITY} \
-e COMPOSER_CONFIG="${COMPOSER_CONFIG}" \
-e COMPOSER_DATASOURCES="${COMPOSER_DATASOURCES}" \
-e COMPOSER_PROVIDERS="${COMPOSER_PROVIDERS}" \
--name rest \
--network composer_default \
-p 3000:3000 \
myorg/my-composer-rest-server
942eb1bfdbaf5807b1fe2baa2608ab35691e9b6912fb0d3b5362531b8adbdd3a
It got executed successfully. So now I should be able to access the persistent and secured REST server by going to explorer page of loopback
But when tried to open the above url got the below error.
Error Image
Have I missed any step or done something wrong.

Answer 1

Two things:
You need to put export in front of the envvars in your envvars.txt file.
Check the version of Composer you are running. The FROM hyperledger/composer-rest-server command will pull the latest version of the rest server down, and if your composer version is not updated, the two will be incompatible.