Podman vs Cri-o ?
Hi Everybody,
I am a little bit confused regarding the difference/relation between Podman and Cri-o.
As far as I could understand : Podman is a replacement for Docker, Cri-o is also intended to be a replacement to docker, but it's still marked "work in progress" as the course says. That makes sense so far.
But in the 3.2 lab when configuring a local repository to host images, We need to do sudo systemctl restart crio
why not restart Podman instead, how Cri-o is used here in combination with Podman ?
Thank you for your help,
Answers
-
Hi @elmoussaoui,
Podman is a daemonless, open source containerization tool used in lab exercises as a replacement for Docker. Operations to build container images, tag images, pull/push to and from registries, and run containers are performed with Podman. However, since it is daemonless (as opposed to Docker that relies on the docker daemon - dockerd), it does not need a restart.
Cri-o is one of the container runtimes that Kubernetes can use to run and manage containers. It runs as daemon, therefore it needs a restart after configuration changes. While Docker was a preferred runtime for Kubernetes, its complex set of tools are not required by Kubernetes to run containers, one of the reasons why cri-o or conainerd are used in many recent Kubernetes cluster deployments.
Regards,
-Chris0 -
Hi @chrispokorni ,
Thanks for answering,So basically Kubernetes is using the combination CRI-O (as a container runtime) + Podman(for build, tag, pull images ..) as a replacement for Docker which was doing all of this , is that correct ? is this only an intermediate phase waiting that the dev of CRI-O finishes, or it will be always like this ?
Regards,
0 -
Hi @elmoussaoui,
Kubernetes uses cri-o as runtime for containers, while developers use Podman or Docker to build container images, run containers, pull/push images, etc...
Kubernetes' support of the Docker runtime is expected to end with the removal of the dockershim from Kubernetes in release v1.24. As a result other runtimes such as cri-o or containerd will be used with Kubernetes to replace Docker, and the labs are reflecting that by introducing cri-o as runtime.
Read more - Dockershim deprecation FAQ
Regards,
-Chris0 -
@chrispokorni Thank makes sense now.
Thanks for the clarification0
Categories
- All Categories
- 139 LFX Mentorship
- 139 LFX Mentorship: Linux Kernel
- 815 Linux Foundation IT Professional Programs
- 367 Cloud Engineer IT Professional Program
- 184 Advanced Cloud Engineer IT Professional Program
- 82 DevOps Engineer IT Professional Program
- 151 Cloud Native Developer IT Professional Program
- 143 Express Training Courses & Microlearning
- 143 Express Courses - Discussion Forum
- Microlearning - Discussion Forum
- 6.6K Training Courses
- 48 LFC110 Class Forum - Discontinued
- 72 LFC131 Class Forum
- 49 LFD102 Class Forum
- 234 LFD103 Class Forum
- 21 LFD110 Class Forum
- 44 LFD121 Class Forum
- 1 LFD123 Class Forum
- LFD125 Class Forum
- 18 LFD133 Class Forum
- 8 LFD134 Class Forum
- 18 LFD137 Class Forum
- 72 LFD201 Class Forum
- 5 LFD210 Class Forum
- 5 LFD210-CN Class Forum
- 2 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- 2 LFD233 Class Forum
- 4 LFD237 Class Forum
- 24 LFD254 Class Forum
- 720 LFD259 Class Forum
- 111 LFD272 Class Forum - Discontinued
- 4 LFD272-JP クラス フォーラム
- 13 LFD273 Class Forum
- 245 LFS101 Class Forum
- 2 LFS111 Class Forum
- 3 LFS112 Class Forum
- 3 LFS116 Class Forum
- 7 LFS118 Class Forum
- LFS120 Class Forum
- 9 LFS142 Class Forum
- 8 LFS144 Class Forum
- 4 LFS145 Class Forum
- 4 LFS146 Class Forum
- 16 LFS148 Class Forum
- 15 LFS151 Class Forum
- 5 LFS157 Class Forum
- 68 LFS158 Class Forum
- LFS158-JP クラス フォーラム
- 11 LFS162 Class Forum
- 2 LFS166 Class Forum
- 7 LFS167 Class Forum
- 3 LFS170 Class Forum
- 2 LFS171 Class Forum
- 3 LFS178 Class Forum
- 3 LFS180 Class Forum
- 2 LFS182 Class Forum
- 5 LFS183 Class Forum
- 33 LFS200 Class Forum
- 737 LFS201 Class Forum - Discontinued
- 3 LFS201-JP クラス フォーラム - Discontinued
- 20 LFS203 Class Forum
- 135 LFS207 Class Forum
- 2 LFS207-DE-Klassenforum
- 2 LFS207-JP クラス フォーラム
- 302 LFS211 Class Forum
- 56 LFS216 Class Forum
- 53 LFS241 Class Forum
- 50 LFS242 Class Forum
- 38 LFS243 Class Forum
- 16 LFS244 Class Forum
- 5 LFS245 Class Forum
- LFS246 Class Forum
- LFS248 Class Forum
- 97 LFS250 Class Forum
- 2 LFS250-JP クラス フォーラム
- 1 LFS251 Class Forum
- 156 LFS253 Class Forum
- 1 LFS254 Class Forum
- 2 LFS255 Class Forum
- 12 LFS256 Class Forum
- 1 LFS257 Class Forum
- 1.3K LFS258 Class Forum
- 11 LFS258-JP クラス フォーラム
- 135 LFS260 Class Forum
- 162 LFS261 Class Forum
- 43 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 24 LFS267 Class Forum
- 25 LFS268 Class Forum
- 37 LFS269 Class Forum
- 7 LFS270 Class Forum
- 202 LFS272 Class Forum - Discontinued
- 2 LFS272-JP クラス フォーラム
- 4 LFS147 Class Forum
- 2 LFS274 Class Forum
- 4 LFS281 Class Forum
- 17 LFW111 Class Forum
- 262 LFW211 Class Forum
- 185 LFW212 Class Forum
- 15 SKF100 Class Forum
- 1 SKF200 Class Forum
- 2 SKF201 Class Forum
- 797 Hardware
- 199 Drivers
- 68 I/O Devices
- 37 Monitors
- 104 Multimedia
- 174 Networking
- 91 Printers & Scanners
- 85 Storage
- 761 Linux Distributions
- 82 Debian
- 67 Fedora
- 17 Linux Mint
- 13 Mageia
- 23 openSUSE
- 149 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 355 Ubuntu
- 470 Linux System Administration
- 39 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 78 Network Management
- 102 System Management
- 47 Web Management
- 69 Mobile Computing
- 18 Android
- 38 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 379 Off Topic
- 115 Introductions
- 177 Small Talk
- 26 Study Material
- 808 Programming and Development
- 304 Kernel Development
- 486 Software Development
- 1.8K Software
- 263 Applications
- 183 Command Line
- 3 Compiling/Installing
- 988 Games
- 317 Installation
- 103 All In Program
- 103 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)