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[chore][pkg/stanza] Cleanup journald input operator files (open-telem…
…etry#32074) Contributes to open-telemetry#32058
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| // Copyright The OpenTelemetry Authors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| //go:build linux | ||
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| package journald // import "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/operator/input/journald" | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "os/exec" | ||
| "regexp" | ||
| "sort" | ||
| "time" | ||
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| jsoniter "github.com/json-iterator/go" | ||
| "go.uber.org/zap" | ||
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| "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/stanza/operator" | ||
| ) | ||
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| const waitDuration = 1 * time.Second | ||
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| func init() { | ||
| operator.Register(operatorType, func() operator.Builder { return NewConfig() }) | ||
| } | ||
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| // Build will build a journald input operator from the supplied configuration | ||
| func (c Config) Build(logger *zap.SugaredLogger) (operator.Operator, error) { | ||
| inputOperator, err := c.InputConfig.Build(logger) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| args, err := c.buildArgs() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| return &Input{ | ||
| InputOperator: inputOperator, | ||
| newCmd: func(ctx context.Context, cursor []byte) cmd { | ||
| if cursor != nil { | ||
| args = append(args, "--after-cursor", string(cursor)) | ||
| } | ||
| return exec.CommandContext(ctx, "journalctl", args...) // #nosec - ... | ||
| // journalctl is an executable that is required for this operator to function | ||
| }, | ||
| json: jsoniter.ConfigFastest, | ||
| }, nil | ||
| } | ||
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| func (c Config) buildArgs() ([]string, error) { | ||
| args := make([]string, 0, 10) | ||
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| // Export logs in UTC time | ||
| args = append(args, "--utc") | ||
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| // Export logs as JSON | ||
| args = append(args, "--output=json") | ||
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| // Continue watching logs until cancelled | ||
| args = append(args, "--follow") | ||
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| switch c.StartAt { | ||
| case "end": | ||
| case "beginning": | ||
| args = append(args, "--no-tail") | ||
| default: | ||
| return nil, fmt.Errorf("invalid value '%s' for parameter 'start_at'", c.StartAt) | ||
| } | ||
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| for _, unit := range c.Units { | ||
| args = append(args, "--unit", unit) | ||
| } | ||
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| for _, identifier := range c.Identifiers { | ||
| args = append(args, "--identifier", identifier) | ||
| } | ||
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| args = append(args, "--priority", c.Priority) | ||
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| if len(c.Grep) > 0 { | ||
| args = append(args, "--grep", c.Grep) | ||
| } | ||
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| if c.Dmesg { | ||
| args = append(args, "--dmesg") | ||
| } | ||
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| switch { | ||
| case c.Directory != nil: | ||
| args = append(args, "--directory", *c.Directory) | ||
| case len(c.Files) > 0: | ||
| for _, file := range c.Files { | ||
| args = append(args, "--file", file) | ||
| } | ||
| } | ||
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| if len(c.Matches) > 0 { | ||
| matches, err := c.buildMatchesConfig() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| args = append(args, matches...) | ||
| } | ||
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| if c.All { | ||
| args = append(args, "--all") | ||
| } | ||
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| return args, nil | ||
| } | ||
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| func buildMatchConfig(mc MatchConfig) ([]string, error) { | ||
| re := regexp.MustCompile("^[_A-Z]+$") | ||
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| // Sort keys to be consistent with every run and to be predictable for tests | ||
| sortedKeys := make([]string, 0, len(mc)) | ||
| for key := range mc { | ||
| if !re.MatchString(key) { | ||
| return []string{}, fmt.Errorf("'%s' is not a valid Systemd field name", key) | ||
| } | ||
| sortedKeys = append(sortedKeys, key) | ||
| } | ||
| sort.Strings(sortedKeys) | ||
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| configs := []string{} | ||
| for _, key := range sortedKeys { | ||
| configs = append(configs, fmt.Sprintf("%s=%s", key, mc[key])) | ||
| } | ||
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| return configs, nil | ||
| } | ||
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| func (c Config) buildMatchesConfig() ([]string, error) { | ||
| matches := []string{} | ||
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| for i, mc := range c.Matches { | ||
| if i > 0 { | ||
| matches = append(matches, "+") | ||
| } | ||
| mcs, err := buildMatchConfig(mc) | ||
| if err != nil { | ||
| return []string{}, err | ||
| } | ||
|
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| matches = append(matches, mcs...) | ||
| } | ||
|
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| return matches, nil | ||
| } |
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