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This PR fixes issue #2270 where AWS SDK debug logs expose sensitive credentials in helmfile output, by adding flexible, configurable AWS SDK logging with secure defaults. Problem: -------- Despite PR #2288's fix, AWS SDK debug logs still appeared in helmfile output, exposing sensitive information: - AWS tokens and authorization headers - Request/response bodies containing credentials - Secret metadata from vals providers Root Cause: ----------- 1. PR #2288 only suppressed vals' own logging via LogOutput: io.Discard 2. AWS SDK v2 uses separate logging (AWS_SDK_GO_LOG_LEVEL, WithClientLogMode) 3. Vals library defaulted to verbose logging (aws.LogRetries | aws.LogRequest) 4. No programmatic way to control AWS SDK logging Solution: --------- Two-part fix in conjunction with vals PR #893: 1. Vals library enhancement (helmfile/vals#893): - Added Options.AWSLogLevel field for programmatic control - Changed default from verbose to secure (no logging) - Added preset levels: off, minimal, standard, verbose - Maintains AWS_SDK_GO_LOG_LEVEL precedence 2. Helmfile changes (this PR): - Added HELMFILE_AWS_SDK_LOG_LEVEL environment variable - Enhanced vals configuration to use new AWSLogLevel field - Added conditional AWS SDK log suppression in remote.go (3 locations) - Comprehensive unit tests (15 test cases) Configuration: -------------- Preset levels via HELMFILE_AWS_SDK_LOG_LEVEL: - "off" (default) - No logging, secure, prevents credential leakage - "minimal" - Log retries only - "standard" - Log retries + requests (previous default behavior) - "verbose" - Log everything (requests, responses, bodies, signing) - Custom - Comma-separated values (e.g., "request,response") Priority order: 1. AWS_SDK_GO_LOG_LEVEL env var (highest) 2. HELMFILE_AWS_SDK_LOG_LEVEL env var 3. Secure default ("off") Testing: -------- Added comprehensive unit tests: - pkg/plugins/vals_test.go: 9 test cases * TestAWSSDKLogLevelConfiguration - all preset levels * TestEnvironmentVariableReading - env var parsing - pkg/remote/remote_test.go: 6 test cases * TestAWSSDKLogLevelInit - init() logic All tests passing: - pkg/plugins: PASS (3/3 test suites) - pkg/remote: PASS (all test suites) - golangci-lint: 0 issues Files changed: 7 files, 271 insertions(+), 31 deletions(-) Security: --------- Before: Credentials exposed by default (aws.LogRetries | aws.LogRequest) After: Credentials protected by default (no logging unless explicitly enabled) Follows security principles: - Secure by default - Principle of least privilege - Explicit opt-in for sensitive logging - Defense in depth Dependency: ----------- Depends on: helmfile/vals#893 Currently using: aditmeno/vals@a97336ce2b (via go.mod replace) After vals PR merges: Update to official release Fixes: #2270 Related: #2288, #2289, helmfile/vals#893 Signed-off-by: Aditya Menon <amenon@canarytechnologies.com> |
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README.md
Helmfile
Deploy Kubernetes Helm Charts
English | 简体中文
About
Helmfile is a declarative spec for deploying helm charts. It lets you...
- Keep a directory of chart value files and maintain changes in version control.
- Apply CI/CD to configuration changes.
- Periodically sync to avoid skew in environments.
To avoid upgrades for each iteration of helm, the helmfile executable delegates to helm - as a result, the following must be installed
Highlights
Declarative: Write, version-control, apply the desired state file for visibility and reproducibility.
Modules: Modularize common patterns of your infrastructure, distribute it via Git, S3, etc. to be reused across the entire company (See #648)
Versatility: Manage your cluster consisting of charts, kustomizations, and directories of Kubernetes resources, turning everything to Helm releases (See #673)
Patch: JSON/Strategic-Merge Patch Kubernetes resources before helm-installing, without forking upstream charts (See #673)
Status
May 2025 Update
- Helmfile v1.0 and v1.1 has been released. We recommend upgrading directly to v1.1 if you are still using v0.x.
- If you haven't already upgraded, please go over this v1 proposal here to see a small list of breaking changes.
Installation
1: Binary Installation
download one of releases
2: Package Manager
- Archlinux: install via
pacman -S helmfile - openSUSE: install via
zypper in helmfileassuming you are on Tumbleweed; if you are on Leap you must add the kubic repo for your distribution version once before that command, e.g.zypper ar https://download.opensuse.org/repositories/devel:/kubic/openSUSE_Leap_\$releasever kubic - Windows (using scoop):
scoop install helmfile - macOS (using homebrew):
brew install helmfile
3: Container
For more details, see run as a container
Make sure to run
helmfile initonce after installation. Helmfile uses the helm-diff plugin.
Getting Started
Let's start with a simple helmfile and gradually improve it to fit your use-case!
Suppose the helmfile.yaml representing the desired state of your helm releases looks like:
repositories:
- name: prometheus-community
url: https://prometheus-community.github.io/helm-charts
releases:
- name: prom-norbac-ubuntu
namespace: prometheus
chart: prometheus-community/prometheus
set:
- name: rbac.create
value: false
Sync your Kubernetes cluster state to the desired one by running:
helmfile apply
Congratulations! You now have your first Prometheus deployment running inside your cluster.
Iterate on the helmfile.yaml by referencing:
More complex examples
See: multi-env-helmfile
Docs
Please read complete documentation
Contributing
Welcome to contribute together to make helmfile better: contributing doc
Attribution
We use:
- semtag for automated semver tagging. I greatly appreciate the author(pnikosis)'s effort on creating it and their kindness to share it!
Users
Helmfile has been used by many users in production:
For more users, please see: Users