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Seed docker mirrors by pulling once per mirror first

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Find the first registry mirror on each host. If we find any, pull the
images on one host per mirror, then do the remainder concurrently.

The initial pulls will seed the mirrors ensuring that we pull the image
from Docker Hub once each.

This works best if there is only one mirror on each host.
This commit is contained in:
Donal McBreen
2024-07-11 13:05:32 +01:00
parent 1573cebadf
commit 1369c46a83
6 changed files with 81 additions and 6 deletions
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29
test/cli/build_test.rb
View File

@@ -169,12 +169,41 @@ class CliBuildTest < CliTestCase
test "pull" do
run_command("pull").tap do |output|
assert_match /docker info --format '{{index .RegistryConfig.Mirrors 0}}'/, output
assert_match /docker image rm --force dhh\/app:999/, output
assert_match /docker pull dhh\/app:999/, output
assert_match "docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1)", output
end
end
test "pull with mirror" do
SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
.with(:docker, :info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
.returns("registry-mirror.example.com")
.at_least_once
run_command("pull").tap do |output|
assert_match /Pulling image on 1\.1\.1\.\d to seed the mirror\.\.\./, output
assert_match "Pulling image on remaining hosts...", output
assert_match /docker pull dhh\/app:999/, output
assert_match "docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1)", output
end
end
test "pull with mirrors" do
SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
.with(:docker, :info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
.returns("registry-mirror.example.com", "registry-mirror2.example.com")
.at_least_once
run_command("pull").tap do |output|
assert_match /Pulling image on 1\.1\.1\.\d, 1\.1\.1\.\d to seed the mirrors\.\.\./, output
assert_match "Pulling image on remaining hosts...", output
assert_match /docker pull dhh\/app:999/, output
assert_match "docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1)", output
end
end
test "create" do
run_command("create").tap do |output|
assert_match /docker buildx create --use --name kamal-app-multiarch/, output

10
test/cli/main_test.rb
View File

@@ -122,6 +122,11 @@ class CliMainTest < CliTestCase
.with(:docker, :buildx, :inspect, "kamal-app-multiarch", "> /dev/null")
.returns("")
SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
.with(:docker, :info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
.returns("")
.at_least_once
assert_raises(Kamal::Cli::LockError) do
run_command("deploy")
end
@@ -155,6 +160,11 @@ class CliMainTest < CliTestCase
.with(:docker, :buildx, :inspect, "kamal-app-multiarch", "> /dev/null")
.returns("")
SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
.with(:docker, :info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
.returns("")
.at_least_once
assert_raises(SSHKit::Runner::ExecuteError) do
run_command("deploy")
end