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de603f87de
* Add new configurable bootstrap writers (#2405) This PR adds the ability to configure different backends to use for storing modifications to the zero bootstrap config. The two currently implemented backends allow writing changes to a file or to a Kubernetes secret. Backend selection is determined by the scheme in a URI passed to the flag '--config-writeback-uri'. In a Kubernetes environment, where the bootstrap config is mounted into the pod from a secret, this option allows Pomerium to write changes back to the secret, as writes to the mounted secret file on disk are not persisted. * Use env vars for bootstrap config filepath/writeback uri * linter pass and code cleanup * Add new config writer options mechanism This moves the encryption cipher parameter out of the WriteConfig() method in the ConfigWriter interface and into a new ConfigWriterOptions struct. Options (e.g. cipher) can be applied to an existing ConfigWriter to allow customizing implementation-specific behavior. * Code cleanup/lint fixes * Move vendored k8s code into separate package, and add license header and package comment
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
package filesystem
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import (
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"context"
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"encoding/json"
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"fmt"
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"net/url"
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"os"
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"github.com/pomerium/pomerium/internal/zero/bootstrap/writers"
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"github.com/pomerium/pomerium/pkg/cryptutil"
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cluster_api "github.com/pomerium/pomerium/pkg/zero/cluster"
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)
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func init() {
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writers.RegisterBuilder("file", newFileWriter)
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}
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func newFileWriter(uri *url.URL) (writers.ConfigWriter, error) {
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if uri.Host != "" {
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// prevent the common mistake of "file://path/to/file"
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return nil, fmt.Errorf(`invalid file uri %q (did you mean "file:///%s%s"?)`, uri.String(), uri.Host, uri.Path)
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}
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return &fileWriter{
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filePath: uri.Path,
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}, nil
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}
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type fileWriter struct {
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opts writers.ConfigWriterOptions
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filePath string
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}
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// WithOptions implements writers.ConfigWriter.
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func (w *fileWriter) WithOptions(opts writers.ConfigWriterOptions) writers.ConfigWriter {
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clone := *w
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clone.opts = opts
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return &clone
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}
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// WriteConfig implements ConfigWriter.
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func (w *fileWriter) WriteConfig(_ context.Context, src *cluster_api.BootstrapConfig) error {
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data, err := json.Marshal(src)
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if err != nil {
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return fmt.Errorf("marshal file config: %w", err)
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}
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if w.opts.Cipher != nil {
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data = cryptutil.Encrypt(w.opts.Cipher, data, nil)
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}
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err = os.WriteFile(w.filePath, data, 0o600)
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if err != nil {
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return fmt.Errorf("write bootstrap config: %w", err)
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}
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return nil
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}
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var _ writers.ConfigWriter = (*fileWriter)(nil)
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