ssh to VM fails after creating for lab 1.1

ssh in browser window starts with status:
Connecting...
Establishing connection to SSH server...
You can drastically improve your key transfer times by migrating to OS Login.
but it eventually fails with error:
Connection Failed
We are unable to connect to the VM on port 22. Learn more about possible causes of this issue.
The VM was created as per the course lab instructions.
Why is ssh failing?!
Comments
-
Hi @haral,
There are a few reasons why the connection to your GCE instance fails from the cloud console - a firewall rule blocking port 22, or sshd not ready. You can explore the google cloud documentation to help you to troubleshoot and possibly resolve the issue.
Regards,
-Chris0 -
haral@cloudshell:~$ netstat -pan | grep 22
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -0 -
haral@cloudshell:~$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destinationChain FORWARD (policy ACCEPT)
target prot opt source destination
DOCKER-USER all -- anywhere anywhere
DOCKER-ISOLATION-STAGE-1 all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhereChain OUTPUT (policy ACCEPT)
target prot opt source destination0 -
Hi @haral,
Can you validate that the ssh daemon is listening on port 22? The output is missing that information.
sudo
would also help.Is your GCE VPC firewall allowing all ingress? If not, is there a firewall rule allowing ingress to port 22?
Regards,
-Chris0 -
haral@cloudshell:~$ netstat -pan | grep 22
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -0 -
I gave up on GCP and attempting to run on local Ubuntu VM. In lab 3.2 LXC, the command "lxc-create -t download -n unpriv-cont-user" fails with:
aral@ubuntu:~$ lxc-create -t download -n unpriv-cont-user
lxc-create: unpriv-cont-user: conf.c: lxc_map_ids: 2878 newuidmap failed to write mapping "newuidmap: uid range [0-1) -> [231072-231073) not allowed": newuidmap 3149 0 231072 1 1000 1000 1
lxc-create: unpriv-cont-user: conf.c: userns_exec_mapped_root: 4646 Error setting up {g,u}id mappings for child process "3149"
lxc-create: unpriv-cont-user: tools/lxc_create.c: main: 319 Failed to create container unpriv-cont-user
haral@ubuntu:~$The contents of the default.conf file are:
aral@ubuntu:~$ cat ~/.config/lxc/default.conf
lxc.net.0.type = veth
lxc.net.0.link = lxcbr0
lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
lxc.idmap = u 0 231072 65536
lxc.idmap = g 0 231072 65536I saw another help request and tried the suggested command but that also failed:
haral@ubuntu:~$ sudo lxc-create -t download -n unpriv-cont-user -- -d ubuntu -r xenial -a amd64
Setting up the GPG keyring
ERROR: Unable to fetch GPG key from keyserver
lxc-create: unpriv-cont-user: lxccontainer.c: create_run_template: 1616 Failed to create container from template
lxc-create: unpriv-cont-user: tools/lxc_create.c: main: 319 Failed to create container unpriv-cont-user
haral@ubuntu:~$0 -
Hi @haral,
Running
sudo netstat
, as suggested earlier, may have produced a more detailed output.Subsequently, are you populating the
~/.config/lxc/default.conf
file withlxc.idmap
values extracted from the/etc/subuid
and/etc/subgid
files?On local Ubuntu guest VMs, you may also need to set read-write permissions on the
default.conf
file, with the following command:chmod 664 ~/.config/lxc/default.conf
Regards,
-Chris0 -
sudo netstat may have given some more output but you can see that sshd is running and listening on port 22 just from running netstat as a regular user...
I am following the commands exactly as shown, however the contents of the /etc/subuid and /etc/subgid files are different - they only have one entry:
haral@ubuntu:~$ ls -l .config/lxc/default.conf
-rw-r--r-- 1 haral haral 162 Sep 8 01:00 .config/lxc/default.conf
haral@ubuntu:~$ chmod 664 !$
chmod 664 .config/lxc/default.conf
haral@ubuntu:~$ cat !$
cat .config/lxc/default.conf
lxc.net.0.type = veth
lxc.net.0.link = lxcbr0
lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
lxc.idmap = u 0 231072 65536
lxc.idmap = g 0 231072 65536
haral@ubuntu:~$ cat /etc/subuid
haral:100000:65536
haral@ubuntu:~$ cat /etc/subgid
haral:100000:65536
udo lxc-create -t download -n unpriv-cont-user -- -d ubuntu -r xenial -a amd64
[sudo] password for haral:
Setting up the GPG keyring
ERROR: Unable to fetch GPG key from keyserver
lxc-create: unpriv-cont-user: lxccontainer.c: create_run_template: 1616 Failed to create container from template
lxc-create: unpriv-cont-user: tools/lxc_create.c: main: 319 Failed to create container unpriv-cont-user
haral@ubuntu:~$0 -
The uid was incorrect in my previous post. Here is the correct output:
haral@ubuntu:~$ cat /etc/subuid
haral:100000:65536
haral@ubuntu:~$ cat /etc/subgid
haral:100000:65536
haral@ubuntu:~$ cat /etc/lxc/lxc-usernetUSERNAME TYPE BRIDGE COUNT
haral veth lxcbr0 10
haral@ubuntu:~$ cat ~/.config/lxc/default.conf
lxc.net.0.type = veth
lxc.net.0.link = lxcbr0
lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
lxc.idmap = u 0 100000 65536
lxc.idmap = g 0 100000 65536
haral@ubuntu:~$ id
uid=1000(haral) gid=1000(haral) groups=1000(haral),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),116(lpadmin),126(sambashare)
haral@ubuntu:~$ sudo lxc-create -t download -n unpriv-cont-user -- -d ubuntu -r xenial -a amd64
Setting up the GPG keyring
ERROR: Unable to fetch GPG key from keyserver
lxc-create: unpriv-cont-user: lxccontainer.c: create_run_template: 1617 Failed to create container from template
lxc-create: unpriv-cont-user: tools/lxc_create.c: main: 327 Failed to create container unpriv-cont-user
haral@ubuntu:~$ lxc-create -t download -n unpriv-cont-user
lxc-create: unpriv-cont-user: tools/lxc_create.c: main: 327 Failed to create container unpriv-cont-user0 -
0
-
But, it still fails...
0 -
The keyserver command allowed me to continue...
0
Categories
- All Categories
- 51 LFX Mentorship
- 104 LFX Mentorship: Linux Kernel
- 576 Linux Foundation IT Professional Programs
- 304 Cloud Engineer IT Professional Program
- 125 Advanced Cloud Engineer IT Professional Program
- 53 DevOps Engineer IT Professional Program
- 61 Cloud Native Developer IT Professional Program
- 5 Express Training Courses
- 5 Express Courses - Discussion Forum
- 2.1K Training Courses
- 19 LFC110 Class Forum
- 7 LFC131 Class Forum
- 27 LFD102 Class Forum
- 158 LFD103 Class Forum
- 20 LFD121 Class Forum
- 1 LFD137 Class Forum
- 61 LFD201 Class Forum
- 1 LFD210 Class Forum
- LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 611 LFD259 Class Forum
- 105 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 1 LFD273 Class Forum
- 2 LFS145 Class Forum
- 25 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 11 LFS203 Class Forum
- 75 LFS207 Class Forum
- 300 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 11 LFS244 Class Forum
- 37 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 141 LFS253 Class Forum
- LFS254 Class Forum
- 1.1K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 93 LFS260 Class Forum
- 132 LFS261 Class Forum
- 33 LFS262 Class Forum
- 80 LFS263 Class Forum
- 15 LFS264 Class Forum
- 11 LFS266 Class Forum
- 18 LFS267 Class Forum
- 18 LFS268 Class Forum
- 23 LFS269 Class Forum
- 203 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- LFS281 Class Forum
- 236 LFW211 Class Forum
- 172 LFW212 Class Forum
- 7 SKF100 Class Forum
- SKF200 Class Forum
- 903 Hardware
- 219 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 209 Networking
- 101 Printers & Scanners
- 85 Storage
- 763 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 142 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 479 Linux System Administration
- 41 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 78 Network Management
- 108 System Management
- 49 Web Management
- 68 Mobile Computing
- 23 Android
- 30 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 538 Off Topic
- 131 Introductions
- 217 Small Talk
- 22 Study Material
- 826 Programming and Development
- 278 Kernel Development
- 514 Software Development
- 928 Software
- 260 Applications
- 184 Command Line
- 3 Compiling/Installing
- 76 Games
- 316 Installation
- 61 All In Program
- 61 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)