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#1 Yesterday 05:32:32
- Cory Parsnipson
- Member
- Registered: 2024-08-25
- Posts: 17
[SOLVED] Can't pull anything using docker on Arch
I've installed docker and started the service/daemon for it. But when I try to pull from the registry, it cannot seem to resolve the host:
sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
e6590344b1a5: Retrying in 1 second
docker: error pulling image configuration: download failed after attempts=6: dial tcp: lookup production.cloudflare.docker.com: no such host.I found some topics about modifying the nameserver to 8.8.8.8 or having to use a proxy if you are on vpn or behind a proxy (but I am not using either of those things). The nameserver modification doesn't seem to work.
Anyone else have this problem?
Docker info output:
Client:
Version: 27.3.1
Context: default
Debug Mode: false
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 0
Server Version: 27.3.1
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: true
Native Overlay Diff: false
userxattr: false
Logging Driver: json-file
Cgroup Driver: systemd
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
Swarm: inactive
Runtimes: io.containerd.runc.v2 runc
Default Runtime: runc
Init Binary: docker-init
containerd version: c507a0257ea6462fbd6f5ba4f5c74facb04021f4.m
runc version:
init version: de40ad0
Security Options:
seccomp
Profile: builtin
cgroupns
Kernel Version: 6.12.10-arch1-1
Operating System: Arch Linux
OSType: linux
Architecture: x86_64
CPUs: 8
Total Memory: 6.702GiB
Name: <redacted>
ID: <redacted>
Docker Root Dir: /var/lib/docker
Debug Mode: false
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: falseLast edited by Cory Parsnipson (Yesterday 23:52:33)
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#2 Yesterday 06:56:11
- -thc
- Member
- Registered: 2017-03-15
- Posts: 775
Re: [SOLVED] Can't pull anything using docker on Arch
Does DNS resolution work?
drill production.cloudflare.docker.com
ping -4 production.cloudflare.docker.com
ping -6 production.cloudflare.docker.comOffline
#3 Yesterday 07:47:22
- Cory Parsnipson
- Member
- Registered: 2024-08-25
- Posts: 17
Re: [SOLVED] Can't pull anything using docker on Arch
Ah, maybe this is a little weird. Drill seems to work fine, but my ping can't seem to resolve hostnames. It's not supposed to be like this, is it?
drill output:
;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 61063
;; flags: qr rd ra ; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;; production.cloudflare.docker.com. IN A
;; ANSWER SECTION:
production.cloudflare.docker.com. 300 IN A 104.16.97.215
production.cloudflare.docker.com. 300 IN A 104.16.100.215
production.cloudflare.docker.com. 300 IN A 104.16.101.215
production.cloudflare.docker.com. 300 IN A 104.16.98.215
production.cloudflare.docker.com. 300 IN A 104.16.99.215
;; AUTHORITY SECTION:
;; ADDITIONAL SECTION:
;; Query time: 107 msec
;; SERVER: 75.75.76.76
;; WHEN: Wed Jan 29 23:43:31 2025
;; MSG SIZE rcvd: 130ping -4 production.cloudflare.docker.com:
ping: production.cloudflare.docker.com: Name or service not knownping -6 production.cloudflare.docker.com:
ping: production.cloudflare.docker.com: Name or service not known======================
Maybe there's something I messed up in my network config.
Here's /etc/resolv.conf:
# Generated by dhcpcd from enp1s0f0.dhcp, enp1s0f0.ra
# /etc/resolv.conf.head can replace this line
domain hsd1.ca.comcast.net
nameserver 75.75.75.75
nameserver 75.75.76.76
nameserver 2001:558:feed::1
nameserver 2001:558:feed::2
# /etc/resolv.conf.tail can replace this lineAnd /etc/hosts:
# Static table lookup for hostnames.
# See hosts(5) for details.
#
# <ip-address> <hostname.domain.org> <hostname>
127.0.0.1 <redacted> localhost
::1 <redacted> localhost========================
edit: another fact is that I have avahi running on this computer, and systemd-resolved is not. I started systemd-resolved real quick, but ping still did not work.
Last edited by Cory Parsnipson (Yesterday 07:59:09)
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#4 Yesterday 08:48:02
- -thc
- Member
- Registered: 2017-03-15
- Posts: 775
Re: [SOLVED] Can't pull anything using docker on Arch
Ah, maybe this is a little weird. Drill seems to work fine, but my ping can't seem to resolve hostnames. It's not supposed to be like this, is it?
Nope.
Maybe there's something I messed up in my network config.
Yep.
Here's /etc/resolv.conf:
# Generated by dhcpcd from enp1s0f0.dhcp, enp1s0f0.ra # /etc/resolv.conf.head can replace this line domain hsd1.ca.comcast.net nameserver 75.75.75.75 nameserver 75.75.76.76 nameserver 2001:558:feed::1 nameserver 2001:558:feed::2 # /etc/resolv.conf.tail can replace this line
That means your Network configuration is managed by dhcpcd? Is this intended?
edit: another fact is that I have avahi running on this computer, and systemd-resolved is not. I started systemd-resolved real quick, but ping still did not work.
Please stop "messing around". At best nothing useful happens and the worst case is you damage your installation even further.
What does your "/etc/nsswitch.conf" look like?
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#5 Yesterday 21:44:55
- Cory Parsnipson
- Member
- Registered: 2024-08-25
- Posts: 17
Re: [SOLVED] Can't pull anything using docker on Arch
That means your Network configuration is managed by dhcpcd? Is this intended?
Yes, though perhaps this is not correct? I have a router/modem thing from comcast that assigns IP addresses to new host computers that connect to my network. It sounded like from the arch installation guide that I would need a dhcp client on my arch server for this.
I arbitrarily picked dhcpcd from the list here: https://wiki.archlinux.org/title/Networ … k_managers.
What does your "/etc/nsswitch.conf" look like?
# Name Service Switch configuration file.
# See nsswitch.conf(5) for details.
passwd: files systemd
group: files [SUCCESS=merge] systemd
shadow: files systemd
gshadow: files systemd
publickey: files
hosts: mymachines mdns [NOTFOUND=return] resolve [!UNAVAIL=return] files myhostname dns
networks: files
protocols: files
services: files
ethers: files
rpc: files
netgroup: filesOffline
#6 Yesterday 23:09:27
- -thc
- Member
- Registered: 2017-03-15
- Posts: 775
Re: [SOLVED] Can't pull anything using docker on Arch
Yes, though perhaps this is not correct? I have a router/modem thing from comcast that assigns IP addresses to new host computers that connect to my network. It sounded like from the arch installation guide that I would need a dhcp client on my arch server for this.
But most of the network management packages have their own built-in DHCP client (iwd, systemd-networkd, NetworkManager) or can use a external DHCP client. Take a look at https://wiki.archlinux.org/title/Networ … k_managers and decide what's best for your use case.
# Name Service Switch configuration file. # See nsswitch.conf(5) for details. passwd: files systemd group: files [SUCCESS=merge] systemd shadow: files systemd gshadow: files systemd publickey: files hosts: mymachines mdns [NOTFOUND=return] resolve [!UNAVAIL=return] files myhostname dns networks: files protocols: files services: files ethers: files rpc: files netgroup: files
This actually instructs avahi to also resolve other TLD domains (beside ".local") - maybe that's not what you want.
Replace it with
hosts: mymachines mdns_minimal [NOTFOUND=return] resolve [!UNAVAIL=return] files myhostname dnsto instruct avahi to only resolve for ".local".
Last edited by -thc (Yesterday 23:10:17)
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#7 Yesterday 23:51:02
- Cory Parsnipson
- Member
- Registered: 2024-08-25
- Posts: 17
Re: [SOLVED] Can't pull anything using docker on Arch
Cory Parsnipson wrote:Yes, though perhaps this is not correct? I have a router/modem thing from comcast that assigns IP addresses to new host computers that connect to my network. It sounded like from the arch installation guide that I would need a dhcp client on my arch server for this.
But most of the network management packages have their own built-in DHCP client (iwd, systemd-networkd, NetworkManager) or can use a external DHCP client. Take a look at https://wiki.archlinux.org/title/Networ … k_managers and decide what's best for your use case.
Cory Parsnipson wrote:# Name Service Switch configuration file. # See nsswitch.conf(5) for details. passwd: files systemd group: files [SUCCESS=merge] systemd shadow: files systemd gshadow: files systemd publickey: files hosts: mymachines mdns [NOTFOUND=return] resolve [!UNAVAIL=return] files myhostname dns networks: files protocols: files services: files ethers: files rpc: files netgroup: filesThis actually instructs avahi to also resolve other TLD domains (beside ".local") - maybe that's not what you want.
Replace it withhosts: mymachines mdns_minimal [NOTFOUND=return] resolve [!UNAVAIL=return] files myhostname dnsto instruct avahi to only resolve for ".local".
Ah okay. I think I was confused when following the installation instructions here. Upon rereading it looks like systemd-resolved and systemd-networkd are included by default and I should have probably just enabled those two and been done with everything. I installed dhcpcd instead.
As for the avahi config, I forgot to put that back after configuring it... Using mdsn_minimal and restarting the avahi-daemon service looks like has restored my hostname resolution functionality.
Thank you
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