Unable to use variable substitution to set a number #5570
Description
This was originally reported against moby/moby at moby/moby#35852. They claimed it was a docker-compose issue and requested I report it here.
Description
I am trying to use an environment variable to limit the number of CPUs by a container.
Steps to reproduce the issue:
Create this docker-compose file
test.yml
version: "2.2"
services:
neo4j:
image: neo4j:3.2
cpus: ${MAX_CPUS}
# volumes:
# - ${MAX_CPUS}:/foo
Create this script
test.sh
#!/bin/sh
export MAX_CPUS=4
docker-compose -f test.yml up -d
Run the script: ./test.sh
Describe the results you received:
Docker-compose complained that the cpus parameter was not a number.
$ ./test.sh
ERROR: The Compose file './test.yml' is invalid because:
services.neo4j.cpus contains an invalid type, it should be a number
Describe the results you expected:
It should start the neo4j container, with the number of cpus limited to 4.
Additional information you deem important (e.g. issue happens only occasionally):
If I uncomment the volumes lines and comment the cpus line, then it does complain about an unknown value 4, so the value of the variable is being correctly read.
Output of docker version:
Client:
Version: 17.09.1-ce
API version: 1.32
Go version: go1.8.3
Git commit: 19e2cf6
Built: Thu Dec 7 22:22:25 2017
OS/Arch: darwin/amd64
Server:
Version: 17.09.1-ce
API version: 1.32 (minimum version 1.12)
Go version: go1.8.3
Git commit: 19e2cf6
Built: Thu Dec 7 22:28:28 2017
OS/Arch: linux/amd64
Experimental: false
Output of docker info:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 21
Server Version: 17.09.1-ce
Storage Driver: aufs
Root Dir: /mnt/sda1/var/lib/docker/aufs
Backing Filesystem: extfs
Dirs: 41
Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 06b9cb35161009dcb7123345749fef02f7cea8e0
runc version: 3f2f8b84a77f73d38244dd690525642a72156c64
init version: 949e6fa
Security Options:
seccomp
Profile: default
Kernel Version: 4.4.104-boot2docker
Operating System: Boot2Docker 17.09.1-ce (TCL 7.2); HEAD : e7de9ae - Fri Dec 8 19:41:36 UTC 2017
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 11.44GiB
Name: gridsafe
ID: WXFJ:D2IP:3GQE:WX3K:ZBUC:FGZT:6BIL:QQGD:CWVH:OOHN:AEYE:G4H3
Docker Root Dir: /mnt/sda1/var/lib/docker
Debug Mode (client): false
Debug Mode (server): true
File Descriptors: 17
Goroutines: 27
System Time: 2017-12-20T20:02:50.171308316Z
EventsListeners: 0
Registry: https://index.docker.io/v1/
Labels:
provider=virtualbox
Experimental: false
Insecure Registries:
ads-nexus.str.corp:5000
ads-nexus.str.corp:5001
ads-nexus:5000
ads-nexus:5001
127.0.0.0/8
Live Restore Enabled: false
Additional environment details (AWS, VirtualBox, physical, etc.):
docker-machine inspect output
{
"ConfigVersion": 3,
"Driver": {
"IPAddress": "192.168.99.101",
"MachineName": "xxx",
"SSHUser": "docker",
"SSHPort": 63873,
"SSHKeyPath": "/Users/me/.docker/machine/machines/xxx/id_rsa",
"StorePath": "/Users/me/.docker/machine",
"SwarmMaster": false,
"SwarmHost": "tcp://0.0.0.0:3376",
"SwarmDiscovery": "",
"VBoxManager": {},
"HostInterfaces": {},
"CPU": 4,
"Memory": 12000,
"DiskSize": 100000,
"NatNicType": "82540EM",
"Boot2DockerURL": "",
"Boot2DockerImportVM": "",
"HostDNSResolver": false,
"HostOnlyCIDR": "192.168.99.1/24",
"HostOnlyNicType": "82540EM",
"HostOnlyPromiscMode": "deny",
"UIType": "headless",
"HostOnlyNoDHCP": false,
"NoShare": false,
"DNSProxy": true,
"NoVTXCheck": false,
"ShareFolder": ""
},
"DriverName": "virtualbox",
"HostOptions": {
"Driver": "",
"Memory": 0,
"Disk": 0,
"EngineOptions": {
"ArbitraryFlags": [],
"Dns": null,
"GraphDir": "",
"Env": [],
"Ipv6": false,
"InsecureRegistry": [
"ads-nexus:5000",
"ads-nexus:5001",
"ads-nexus.str.corp:5000",
"ads-nexus.str.corp:5001"
],
"Labels": [],
"LogLevel": "",
"StorageDriver": "",
"SelinuxEnabled": false,
"TlsVerify": true,
"RegistryMirror": [],
"InstallURL": "https://get.docker.com"
},
"SwarmOptions": {
"IsSwarm": false,
"Address": "",
"Discovery": "",
"Agent": false,
"Master": false,
"Host": "tcp://0.0.0.0:3376",
"Image": "swarm:latest",
"Strategy": "spread",
"Heartbeat": 0,
"Overcommit": 0,
"ArbitraryFlags": [],
"ArbitraryJoinFlags": [],
"Env": null,
"IsExperimental": false
},
"AuthOptions": {
"CertDir": "/Users/me/.docker/machine/certs",
"CaCertPath": "/Users/me/.docker/machine/certs/ca.pem",
"CaPrivateKeyPath": "/Users/me/.docker/machine/certs/ca-key.pem",
"CaCertRemotePath": "",
"ServerCertPath": "/Users/me/.docker/machine/machines/xxx/server.pem",
"ServerKeyPath": "/Users/me/.docker/machine/machines/xxx/server-key.pem",
"ClientKeyPath": "/Users/me/.docker/machine/certs/key.pem",
"ServerCertRemotePath": "",
"ServerKeyRemotePath": "",
"ClientCertPath": "/Users/me/.docker/machine/certs/cert.pem",
"ServerCertSANs": [],
"StorePath": "/Users/me/.docker/machine/machines/xxx"
}
},
"Name": "xxx"
}
docker-compose version
docker-compose version 1.17.1, build 6d101fb
docker-py version: 2.5.1
CPython version: 2.7.12
OpenSSL version: OpenSSL 1.0.2j 26 Sep 2016