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https://github.com/dtan4/k8stail
tail -f experience for Kubernetes Pods
https://github.com/dtan4/k8stail
kubernetes kubernetes-pods tail
Last synced: 5 days ago
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tail -f experience for Kubernetes Pods
- Host: GitHub
- URL: https://github.com/dtan4/k8stail
- Owner: dtan4
- License: mit
- Created: 2016-11-15T07:19:37.000Z (about 8 years ago)
- Default Branch: master
- Last Pushed: 2024-12-12T01:01:48.000Z (about 1 month ago)
- Last Synced: 2025-01-04T14:09:18.075Z (12 days ago)
- Topics: kubernetes, kubernetes-pods, tail
- Language: Go
- Homepage:
- Size: 1.08 MB
- Stars: 143
- Watchers: 4
- Forks: 14
- Open Issues: 8
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
Awesome Lists containing this project
README
# k8stail
[](https://github.com/dtan4/k8stail/actions?query=workflow%3ATest+branch%3Amaster)
[](https://codecov.io/gh/dtan4/k8stail)
[](https://github.com/dtan4/k8stail/releases)
`tail -f` experience for Kubernetes Pods
As you know, `kubectl logs` can stream only ONE pod at the same time. `k8stail` enables you to watch __log streams of ALL pods__ in the specified namespace or labels in real time, like `tail -f`.
## Table of Contents
* [Requirements](#requirements)
* [Installation](#installation)
+ [Using Homebrew (OS X only)](#using-homebrew-os-x-only)
+ [Precompiled binary](#precompiled-binary)
+ [From source](#from-source)
+ [Run in a Docker container](#run-in-a-docker-container)
* [Usage](#usage)
+ [kubeconfig file](#kubeconfig-file)
+ [Options](#options)
* [Development](#development)
* [Author](#author)
* [License](#license)
## Requirements
Kubernetes 1.3 or above
## Installation
### Using Homebrew (OS X only)
Formula is available at [dtan4/homebrew-dtan4](https://github.com/dtan4/homebrew-dtan4).
```bash
$ brew tap dtan4/dtan4
$ brew install k8stail
```
### Precompiled binary
Precompiled binaries for Windows, OS X, Linux are available at [Releases](https://github.com/dtan4/k8stail/releases).
### From source
```bash
$ go get -d github.com/dtan4/k8stail
$ cd $GOPATH/src/github.com/dtan4/k8stail
$ make deps
$ make install
```
### Run in a Docker container
Docker image is no longer provided officially.
If you'd like to run k8sec in Docker image, see [`Dockerfile`](Dockerfile) and build image by yourself.
```bash
docker build -t k8stail .
```
## Usage
Logs of all pods, all containers in pod in the specified namespace are streaming. When new pod is added, logs of the pod also appears.
To stop streaming and exit, press `Ctrl-C`.
```bash
$ k8stail --namespace awesome-app
Namespace: awesome-app
Labels:
----------
Pod awesome-app-web-4212725599-67vd4 has detected
Pod awesome-app-web-4212725599-6pduy has detected
Pod awesome-app-web-4212725599-lbuny has detected
Pod awesome-app-web-4212725599-mh3g1 has detected
Pod awesome-app-web-4212725599-pvjsm has detected
[awesome-app-web-4212725599-mh3g1][web] | creating base compositions...
[awesome-app-web-4212725599-zei9h][web] | (47.1ms) CREATE TABLE "schema_migrations" ("version" character varying NOT NULL)
[awesome-app-web-4212725599-zei9h][web] | (45.1ms) CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version")
[awesome-app-web-4212725599-zei9h][web] | ActiveRecord::SchemaMigration Load (1.8ms) SELECT "schema_migrations".* FROM "schema_migrations"
[awesome-app-web-4212725599-zei9h][web] | Migrating to CreatePosts (20160218082522)
```
With `--timestamps` option, log timestamp is printed together.
```bash
$ k8stail --namespace awesome-app --timestamps
Namespace: awesome-app
Labels:
----------
Pod awesome-app-web-4212725599-67vd4 has detected
Pod awesome-app-web-4212725599-6pduy has detected
Pod awesome-app-web-4212725599-lbuny has detected
Pod awesome-app-web-4212725599-mh3g1 has detected
Pod awesome-app-web-4212725599-pvjsm has detected
[awesome-app-web-4212725599-mh3g1][web] 2016-11-15T10:57:22.178667425Z | creating base compositions...
[awesome-app-web-4212725599-zei9h][web] 2016-11-15T10:57:22.309011520Z | (47.1ms) CREATE TABLE "schema_migrations" ("version" character varying NOT NULL)
[awesome-app-web-4212725599-zei9h][web] 2016-11-15T10:57:22.309053601Z | (45.1ms) CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version")
[awesome-app-web-4212725599-zei9h][web] 2016-11-15T10:57:22.463700110Z | ActiveRecord::SchemaMigration Load (1.8ms) SELECT "schema_migrations".* FROM "schema_migrations"
[awesome-app-web-4212725599-zei9h][web] 2016-11-15T10:57:22.463743373Z | Migrating to CreatePosts (20160218082522)
```
With `--labels` option, you can filter pods to watch.
```bash
$ k8stail --namespace awesome-app --labels name=awesome-app-web
Namespace: awesome-app
Labels: name=awesome-app-web
----------
Pod awesome-app-web-4212725599-67vd4 has detected
Pod awesome-app-web-4212725599-6pduy has detected
Pod awesome-app-web-4212725599-lbuny has detected
Pod awesome-app-web-4212725599-mh3g1 has detected
Pod awesome-app-web-4212725599-pvjsm has detected
[awesome-app-web-4212725599-mh3g1][web] | creating base compositions...
[awesome-app-web-4212725599-zei9h][web] | (47.1ms) CREATE TABLE "schema_migrations" ("version" character varying NOT NULL)
[awesome-app-web-4212725599-zei9h][web] | (45.1ms) CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version")
[awesome-app-web-4212725599-zei9h][web] | ActiveRecord::SchemaMigration Load (1.8ms) SELECT "schema_migrations".* FROM "schema_migrations"
[awesome-app-web-4212725599-zei9h][web] | Migrating to CreatePosts (20160218082522)
```
### kubeconfig file
`k8stail` uses `~/.kube/config` as default. You can specify another path by `KUBECONFIG` environment variable or `--kubeconfig` option. `--kubeconfig` option always overrides `KUBECONFIG` environment variable.
```bash
$ KUBECONFIG=/path/to/kubeconfig k8stail
# or
$ k8stail --kubeconfig=/path/to/kubeconfig
```
### Options
|Option|Description|Required|Default|
|---------|-----------|-------|-------|
|`--context=CONTEXT`|Kubernetes context|||
|`--debug`|Debug mode using pprof (http://localhost:6060)||`false`|
|`--kubeconfig=KUBECONFIG`|Path of kubeconfig||`~/.kube/config`|
|`--labels=LABELS`|Label filter query (e.g. `app=APP,role=ROLE`)|||
|`--namespace=NAMESPACE`|Kubernetes namespace||`default`|
|`--timestamps`|Include timestamps on each line||`false`|
|`-h`, `-help`|Print command line usage|||
|`-v`, `-version`|Print version|||
## Development
Go 1.7 or above is required.
Clone this repository and build using `make`.
```bash
$ go get -d github.com/dtan4/k8stail
$ cd $GOPATH/src/github.com/dtan4/k8stail
$ make
```
## Author
Daisuke Fujita ([@dtan4](https://github.com/dtan4))
## License
[](LICENSE)