This changes SSH Agent utilization from opt-in to opt-out, bringing
Terraform in line with the behavior of Packer and the `ssh` command
itself.
But skip SSH agent connections if the SSH_AUTH_SOCK env var doesn't exist,
whcih means there's no agent to connect to.
Currently Terraform is leaking goroutines and with that memory. I know
strictly speaking this maybe isn’t a real concern for Terraform as it’s
mostly used as a short running command line executable.
But there are a few of us out there that are using Terraform in some
long running processes and then this starts to become a problem.
Next to that it’s of course good programming practise to clean up
resources when they're not needed anymore. So even for the standard
command line use case, this seems an improvement in resource management.
Personally I see no downsides as the primary connection to the plugin
is kept alive (the plugin is not killed) and only unused connections
that will never be used again are closed to free up any related
goroutines and memory.
* master: (23 commits)
typo
Update CHANGELOG.md
provider/aws: Add docs for autoscaling_policy + cloudwatch_metric_alarm
provider/aws: Add autoscaling_policy
provider/aws: Add cloudwatch_metric_alarm
Update CHANGELOG.md
Update CHANGELOG.md
provider/template: don't error when rendering fails in Exists
Update CHANGELOG.md
Added Azure SQL server and service support.
Update CHANGELOG.md
docs: clarify wording around destroy/apply args
Getting Started: Added a Next Step upon finishing install.
docs: add description of archive format to download page
docs: snapshot plugin dependencies when releasing
add v0.5.3 transitory deps
Fixes support for changing just the read / write capacity of a GSI
Change sleep time for DynamoDB table waits from 3 seconds to 5 seconds
Remove request for attribute changes
Fix AWS SDK imports
...
The Exists function can run in a context where the contents of the
template have changed, but it uses the old set of variables from the
state. This means that when the set of variables changes, rendering will
fail in Exists. This was returning an error, but really it just needs to
be treated as a scenario where the template needs re-rendering.
fixes#2344 and possibly a few other template issues floating around
Radek Simko