95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package docker
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import (
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"fmt"
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"path"
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"github.com/elastic/beats/filebeat/channel"
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"github.com/elastic/beats/filebeat/input"
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"github.com/elastic/beats/filebeat/input/log"
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"github.com/elastic/beats/libbeat/common"
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"github.com/pkg/errors"
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)
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func init() {
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err := input.Register("docker", NewInput)
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if err != nil {
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panic(err)
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}
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}
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// NewInput creates a new docker input
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func NewInput(
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cfg *common.Config,
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outletFactory channel.Connector,
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context input.Context,
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) (input.Input, error) {
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config := defaultConfig
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if err := cfg.Unpack(&config); err != nil {
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return nil, errors.Wrap(err, "reading docker input config")
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}
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// Wrap log input with custom docker settings
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if len(config.Containers.IDs) == 0 {
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return nil, errors.New("Docker input requires at least one entry under 'containers.ids'")
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}
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for idx, containerID := range config.Containers.IDs {
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cfg.SetString("paths", idx, path.Join(config.Containers.Path, containerID, "*.log"))
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}
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if err := checkStream(config.Containers.Stream); err != nil {
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return nil, err
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}
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if err := cfg.SetString("docker-json.stream", -1, config.Containers.Stream); err != nil {
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return nil, errors.Wrap(err, "update input config")
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}
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if err := cfg.SetBool("docker-json.partial", -1, config.Partial); err != nil {
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return nil, errors.Wrap(err, "update input config")
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}
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if err := cfg.SetBool("docker-json.cri_flags", -1, config.Partial); err != nil {
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return nil, errors.Wrap(err, "update input config")
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}
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// Add stream to meta to ensure different state per stream
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if config.Containers.Stream != "all" {
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if context.Meta == nil {
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context.Meta = map[string]string{}
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}
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context.Meta["stream"] = config.Containers.Stream
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}
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return log.NewInput(cfg, outletFactory, context)
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}
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func checkStream(val string) error {
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for _, s := range []string{"all", "stdout", "stderr"} {
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if s == val {
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return nil
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}
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}
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return fmt.Errorf("Invalid value for containers.stream: %s, supported values are: all, stdout, stderr", val)
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}
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