ssmcli

SSM-CLI

This is a simple golang CLI to enable users to easily start AWS Systems Manager Sessions from the terminal, without having to remember the command themselves or list instance IDs.

For list of changes/release, see CHANGELOG.md

Dependencies

At the moment, this tool requires both the AWS CLI and the Session Manager Plugin.

Usage

With some enviroment variables for AWS set, just run ssmcli. The script will list existing sessions first so you can reconnect if one died, then it will list all instances.

Session Manager needs to be working for this script to work, it's just a wrapper! So if the agent isn't installed or can't connect to AWS, it won't work.

Detailed Usage

If you've no profile or variables or token, you'll get this:

$ ssmcli
ERRO[0005] failed to list sessions                       error="NoCredentialProviders: no valid providers in chain. Deprecated.\n\tFor verbose messaging see aws.Config.CredentialsChainVerboseErrors"
ERRO[0005] no credentials provider found, do you need to set AWS_* variables?
ERRO[0005] no instances found

With variables set, you'll get a list of instances that Session Manager knows about:

DEBU[0000] instance found                                id=i-078               name=shearn89.ec2.jenkins
DEBU[0000] instance found                                id=i-040               name=shearn89.ec2.centos.7
DEBU[0000] map[shearn89.ec2.centos.7:i-040               shearn89.ec2.jenkins:i-078              ]
Use the arrow keys to navigate: ↓ ↑ → ←
? Select instance:
  ▸ shearn89.ec2.jenkins
    shearn89.ec2.centos.7

When you select one, you get the option to start a shell, or forward ports:

DEBU[0000] instance found                                id=i-078               name=shearn89.ec2.jenkins
DEBU[0000] instance found                                id=i-040               name=shearn89.ec2.centos.7
DEBU[0000] map[shearn89.ec2.centos.7:i-040               shearn89.ec2.jenkins:i-078              ]
✔ shearn89.ec2.jenkins
DEBU[0135] selected instance                             id=i-078               name=shearn89.ec2.jenkins
Use the arrow keys to navigate: ↓ ↑ → ←
? Select action:
  ▸ start SSH
    forward ports

If you then select SSH, you get a session:

DEBU[0000] instance found                                id=i-078               name=shearn89.ec2.jenkins
DEBU[0000] instance found                                id=i-040               name=shearn89.ec2.centos.7
DEBU[0000] map[shearn89.ec2.centos.7:i-040               shearn89.ec2.jenkins:i-078              ]
✔ shearn89.ec2.jenkins
DEBU[0135] selected instance                             id=i-078               name=shearn89.ec2.jenkins
✔ start SSH
DEBU[0170] selected Action                               action="start SSH"
INFO[0170] starting SSH shell

Starting session with SessionId: shearn89-0a0              
sh-4.2$

If you want to forward ports, then you get the following:

DEBU[0000] instance found                                id=i-078               name=shearn89.ec2.jenkins
DEBU[0000] instance found                                id=i-040               name=shearn89.ec2.centos.7
DEBU[0000] map[shearn89.ec2.centos.7:i-040               shearn89.ec2.jenkins:i-078              ]
✔ shearn89.ec2.jenkins
DEBU[0001] selected instance                             id=i-078               name=shearn89.ec2.jenkins
✔ forward ports
DEBU[0002] selected Action                               action="forward ports"
Use the arrow keys to navigate: ↓ ↑ → ←
? Select port to forward:
  ▸ 22
    80
    443
    8080

(TODO?) And then selecting the port runs the script:

DEBU[0000] instance found                                id=i-078               name=shearn89.ec2.jenkins
DEBU[0000] instance found                                id=i-040               name=shearn89.ec2.centos.7
DEBU[0000] map[shearn89.ec2.centos.7:i-040               shearn89.ec2.jenkins:i-078              ]
✔ shearn89.ec2.jenkins
DEBU[0001] selected instance                             id=i-078               name=shearn89.ec2.jenkins
✔ forward ports
DEBU[0002] selected Action                               action="forward ports"
✔ 8080
DEBU[0022] selected port                                 port=8080
INFO[0022] run port forwarding                           port=8080

Building

Needs a version of Go that supports modules, and then:

go install 

Put it somewhere on your PATH or add GOBIN to your PATH.