Lab 4.1 - sh: find: command not found
Lab 4.1 step 2 (b):
In order to use TLS, find the three files that need to be passed with the etcdctl command. Change into the directory and view available files.
# find . -name etcd
My shell returns sh: find: command not found
Also, none of the ls
commands work for me.
Again returning, sh: ls: command not found
I can create a snapshot by entering the ETCDCTL commands.
Comments
-
I ran into this as well. I am not entirely sure if it is because the etcd container is updated to a very minimal image, but I found a workaround:
- On the control panel / master server, I looked for the etcd container:
sudo docker ps -a | grep etcd efb1d0cf67a5 0369cf4303ff "etcd --advertise-cl…" About an hour ago Up About an hour k8s_etcd_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_5 eb00f4b04d24 k8s.gcr.io/pause:3.2 "/pause" About an hour ago Up About an hour k8s_POD_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_5 f0cc0d56dfbf 0369cf4303ff "etcd --advertise-cl…" 32 hours ago Exited (0) 32 hours ago k8s_etcd_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_4 4ed688ab3e53 k8s.gcr.io/pause:3.2 "/pause" 32 hours ago Exited (0) 32 hours ago k8s_POD_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_4
- Once I found the container, I ran
docker inspec
on the container and look at the parameters passed to the containers that reference theetc
directory, like so:
[email protected]:~$ sudo docker inspect efb1d0cf67a5 | grep etc "Path": "etcd", "--cert-file=/etc/kubernetes/pki/etcd/server.crt", "--data-dir=/var/lib/etcd", "--key-file=/etc/kubernetes/pki/etcd/server.key", "--peer-cert-file=/etc/kubernetes/pki/etcd/peer.crt", "--peer-key-file=/etc/kubernetes/pki/etcd/peer.key", "--peer-trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt", "--trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt" "HostsPath": "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/etc-hosts", "Name": "/k8s_etcd_etcd-cp01_kube-system_c14cf7d1dfa698068ffc2f808ebe757d_5", "/var/lib/etcd:/var/lib/etcd", "/etc/kubernetes/pki/etcd:/etc/kubernetes/pki/etcd", "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/etc-hosts:/etc/hosts", "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/containers/etcd/7aecfad3:/dev/termination-log" "Source": "/var/lib/etcd", "Destination": "/var/lib/etcd", "Source": "/etc/kubernetes/pki/etcd", "Destination": "/etc/kubernetes/pki/etcd", "Source": "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/etc-hosts", "Destination": "/etc/hosts", "Source": "/var/lib/kubelet/pods/c14cf7d1dfa698068ffc2f808ebe757d/containers/etcd/7aecfad3", "SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt" "etcd", "--cert-file=/etc/kubernetes/pki/etcd/server.crt", "--data-dir=/var/lib/etcd", "--key-file=/etc/kubernetes/pki/etcd/server.key", "--peer-cert-file=/etc/kubernetes/pki/etcd/peer.crt", "--peer-key-file=/etc/kubernetes/pki/etcd/peer.key", "--peer-trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt", "--trusted-ca-file=/etc/kubernetes/pki/etcd/ca.crt" "io.kubernetes.container.logpath": "/var/log/pods/kube-system_etcd-cp01_c14cf7d1dfa698068ffc2f808ebe757d/etcd/5.log", "io.kubernetes.container.name": "etcd", "io.kubernetes.pod.name": "etcd-cp01",
- Now I got the paths, I can simply log in to the
etcd
pod and using the paths I found in my grep output, backup the etcd database.
0 -
Hi @danielclough,
It seems the
etcd
container image has been modified and commands that recently worked have been removed from the container's environment. Bummer...@rilindo, alternatively you can display the content of the
/etc/kubernetes/manifests/etcd.yaml
manifest, orkubectl describe
the etcd pod.Regards,
-Chris0 -
@chrispokorni That is even easier. I would go with that approach, then.
0 -
Hello,
Indeed, it looks like the newly updated image only has two commands, cp and sh. Makes things a bit more difficult to work with, for sure. It no longer even has commands such as ls, nor a way of installing new software.
I'm sure it was a great thought for those who assume no one else would need to work inside the image. Probably a "security feature" of some sort.
Thanks for the heads up.
Regards,
1 -
Then how can I delete the file inside the container? When I tried to restore the etcd backup, I got the following error "Error: data-dir "default.etcd" exists"; I found default.etcd and snapshot.db under /tmp, I would like to remove those 2 files and retry toe etcd restore, how can I remove those 2 files inside the etcd container?
Thanks
0 -
Hi @johnley,
Due to continuous changes in Kubernetes and its components, luckily, the latest image versions of the
etcd
container image supports again most commands that allow us to manage artifacts inside the running container. That means that now we can run again commands such ascd
,ls
,cp
,mv
,rm
,rmdir
,touch
,grep
,cat
,echo
,which
,ip
in an interactive terminal on theetcd
container.Regards,
-Chris0
Categories
- 8.9K All Categories
- 13 LFX Mentorship
- 66 LFX Mentorship: Linux Kernel
- 364 Linux Foundation Boot Camps
- 231 Cloud Engineer Boot Camp
- 70 Advanced Cloud Engineer Boot Camp
- 25 DevOps Engineer Boot Camp
- 5 Cloud Native Developer Boot Camp
- 852 Training Courses
- 15 LFC110 Class Forum
- 16 LFD102 Class Forum
- 102 LFD103 Class Forum
- 3 LFD121 Class Forum
- 55 LFD201 Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- 19 LFD254 Class Forum
- 431 LFD259 Class Forum
- 86 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 16 LFS200 Class Forum
- 694 LFS201 Class Forum
- LFS201-JP クラス フォーラム
- 271 LFS211 Class Forum
- 50 LFS216 Class Forum
- 26 LFS241 Class Forum
- 27 LFS242 Class Forum
- 19 LFS243 Class Forum
- 6 LFS244 Class Forum
- 9 LFS250 Class Forum
- LFS250-JP クラス フォーラム
- 108 LFS253 Class Forum
- 791 LFS258 Class Forum
- 7 LFS258-JP クラス フォーラム
- 51 LFS260 Class Forum
- 79 LFS261 Class Forum
- 13 LFS262 Class Forum
- 76 LFS263 Class Forum
- 14 LFS264 Class Forum
- 10 LFS266 Class Forum
- 8 LFS267 Class Forum
- 9 LFS268 Class Forum
- 6 LFS269 Class Forum
- 180 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- 187 LFW211 Class Forum
- 103 LFW212 Class Forum
- 878 Hardware
- 207 Drivers
- 74 I/O Devices
- 43 Monitors
- 115 Multimedia
- 204 Networking
- 98 Printers & Scanners
- 82 Storage
- 724 Linux Distributions
- 82 Debian
- 64 Fedora
- 12 Linux Mint
- 13 Mageia
- 22 openSUSE
- 126 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 347 Ubuntu
- 447 Linux System Administration
- 33 Cloud Computing
- 64 Command Line/Scripting
- Github systems admin projects
- 89 Linux Security
- 73 Network Management
- 105 System Management
- 45 Web Management
- 50 Mobile Computing
- 18 Android
- 19 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 499 Off Topic
- 119 Introductions
- 193 Small Talk
- 19 Study Material
- 747 Programming and Development
- 240 Kernel Development
- 473 Software Development
- 902 Software
- 247 Applications
- 178 Command Line
- 2 Compiling/Installing
- 72 Games
- 314 Installation
- 20 All In Program
- 20 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)