iptables package has a function `detectIptables()` called to initialize
some local variables. Since v20.10.0, it first looks for iptables bin,
then ip6tables and finally it checks what iptables flags are available
(including -C). It early exits when ip6tables isn't available, and
doesn't execute the last check.
To remove port mappings (eg. when a container stops/dies), Docker
first checks if those NAT rules exist and then deletes them. However, in
the particular case where there's no ip6tables bin available, iptables
`-C` flag is considered unavailable and thus it looks for NAT rules by
using some substring matching. This substring matching then fails
because `iptables -t nat -S POSTROUTING` dumps rules in a slighly format
than what's expected.
For instance, here's what `iptables -t nat -S POSTROUTING` dumps:
```
-A POSTROUTING -s 172.18.0.2/32 -d 172.18.0.2/32 -p tcp -m tcp --dport 9999 -j MASQUERADE
```
And here's what Docker looks for:
```
POSTROUTING -p tcp -s 172.18.0.2 -d 172.18.0.2 --dport 9999 -j MASQUERADE
```
Because of that, those rules are considered non-existant by Docker and
thus never deleted. To fix that, this change reorders the code in
`detectIptables()`.
Fixes#42127.
Signed-off-by: Albin Kerouanton <albinker@gmail.com>
(cherry picked from commit af7236f85a)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
- use local variables for chains instead of sharing global variables
- make createNewChain a t.Helper
Signed-off-by: Chee Hau Lim <ch33hau@gmail.com>
(cherry picked from commit a2cea992c2)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This function was added in b86e3bee5a to
work around an issue in os/user.Current(), which SEGFAULTS when compiling
statically with cgo enabled (see golang/go#13470).
We hit similar issues in other parts, and contributed a "osusergo" build-
tag in https://go-review.googlesource.com/c/go/+/330753. The "osusergo"
build tag must be set when compiling static binaries with cgo enabled.
If that build-tag is set, the cgo implementation for user.Current() won't
be used, and a pure-go implementation is used instead;
https://github.com/golang/go/blob/go1.19.4/src/os/user/cgo_lookup_unix.go#L5
With the above in place, we no longer need this workaround, and can remove
the ensureHomeIfIAmStatic() function.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 155e39187c)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
full diff: 0bfcd83e6d...d77361423c
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit c42b304f62)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Notable Updates
- Update overlay snapshotter to check for tmpfs when evaluating usage of userxattr
- Update hcsschim to v0.9.6 to fix resource leak on exec
- Make swapping disabled with memory limit in CRI plugin
- Allow clients to remove created tasks with PID 0
- Fix concurrent map iteration and map write in CRI port forwarding
- Check for nil HugepageLimits to avoid panic in CRI plugin
See the changelog for complete list of changes:
https://github.com/containerd/containerd/releases/tag/v1.6.13
full diff: https://github.com/containerd/containerd/compare/v1.6.12...v1.6.13
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
No changes in vendored code, but removes some indirect dependencies.
full diff: b17f02f0a0...0da442b278
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 0007490b21)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(*Daemon).registerLinks() calling the WriteHostConfig() method of its
container argument is a vestigial behaviour. In the distant past,
registerLinks() would persist the container links in an SQLite database
and drop the link config from the container's persisted HostConfig. This
changed in Docker v1.10 (#16032) which migrated away from SQLite and
began using the link config in the container's HostConfig as the
persistent source of truth. registerLinks() no longer mutates the
HostConfig at all so persisting the HostConfig to disk falls outside of
its scope of responsibilities.
Signed-off-by: Cory Snider <csnider@mirantis.com>
(cherry picked from commit 388fe4aea8)
Signed-off-by: Cory Snider <csnider@mirantis.com>
(*Container).CheckpointTo() upserts a snapshot of the container to the
daemon's in-memory ViewDB and also persists the snapshot to disk. It
does not register the live container object with the daemon's container
store, however. The ViewDB and container store are used as the source of
truth for different operations, so having a container registered in one
but not the other can result in inconsistencies. In particular, the List
Containers API uses the ViewDB as its source of truth and the Container
Inspect API uses the container store.
The (*Daemon).setHostConfig() method is called fairly early in the
process of creating a container, long before the container is registered
in the daemon's container store. Due to a rogue CheckpointTo() call
inside setHostConfig(), there is a window of time where a container can
be included in a List Containers API response but "not exist" according
to the Container Inspect API and similar endpoints which operate on a
particular container. Remove the rogue call so that the caller has full
control over when the container is checkpointed and update callers to
checkpoint explicitly. No changes to (*Daemon).create() are needed as it
checkpoints the fully-created container via (*Daemon).Register().
Fixes#44512.
Signed-off-by: Cory Snider <csnider@mirantis.com>
(cherry picked from commit 0141c6db81)
Signed-off-by: Cory Snider <csnider@mirantis.com>
GetContainer() would return (nil, nil) when looking up a container
if the container was inserted into the containersReplica ViewDB but not
the containers Store at the time of the lookup. Callers which reasonably
assume that the returned err == nil implies returned container != nil
would dereference a nil pointer and panic. Change GetContainer() so that
it always returns a container or an error.
Signed-off-by: Cory Snider <csnider@mirantis.com>
(cherry picked from commit 00157a42d3)
Signed-off-by: Cory Snider <csnider@mirantis.com>
Moby is not a Go module; to prevent anyone from mistakenly trying to
convert it to one before we are ready, introduce a check (usable in CI
and locally) for a go.mod file.
This is preferable to trying to .gitignore the file as we can ensure
that a mistakenly created go.mod is surfaced by Git-based tooling and is
less likely to surprise a contributor.
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
(cherry picked from commit 25c3421802)
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
To make the local build environment more correct and consistent, we
should never leave an uncommitted go.mod in the tree; however, we need a
go.mod for certain commands to work properly. Use a wrapper script to
create and destroy the go.mod as needed instead of potentially changing
tooling behavior by leaving it.
If a go.mod already exists, this script will warn and call the wrapped
command with GO111MODULE=on.
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
(cherry picked from commit a449f77774)
Signed-off-by: Bjorn Neergaard <bneergaard@mirantis.com>
