Restructured docker building

I have restructured the docker build process entirely, the binary gets
built outside of the docker build command, now we are managing all
dependencies with real Alpine packages and I have dropped features like
socat or the cron daemon.

Signed-off-by: Thomas Boerger <tboerger@suse.de>

26 files changed, 134 insertions, 300 deletions

diff --git a/docker/README.md b/docker/README.md
deleted file mode 100644
index e6fa15dda3..0000000000
--- a/docker/README.md
+++ /dev/null
@@ -1,111 +0,0 @@
-# Docker for Gogs
-
-Visit [Docker Hub](https://hub.docker.com/r/gogs/) see all available images and tags.
-
-## Usage
-
-To keep your data out of Docker container, we do a volume (`/var/gogs` -> `/data`) here, and you can change it based on your situation.
-
-```
-# Pull image from Docker Hub.
-$ docker pull gogs/gogs
-
-# Create local directory for volume.
-$ mkdir -p /var/gogs
-
-# Use `docker run` for the first time.
-$ docker run --name=gogs -p 10022:22 -p 10080:3000 -v /var/gogs:/data gogs/gogs
-
-# Use `docker start` if you have stopped it.
-$ docker start gogs
-```
-
-Note: It is important to map the Gogs ssh service from the container to the host and set the appropriate SSH Port and URI settings when setting up Gogs for the first time. To access and clone Gogs Git repositories with the above configuration you would use: `git clone ssh://git@hostname:10022/username/myrepo.git` for example.
-
-Files will be store in local path `/var/gogs` in my case.
-
-Directory `/var/gogs` keeps Git repositories and Gogs data:
-
-    /var/gogs
-    |-- git
-    |   |-- gogs-repositories
-    |-- ssh
-    |   |-- # ssh public/private keys for Gogs
-    |-- gogs
-        |-- conf
-        |-- data
-        |-- log
-
-### Volume with data container
-
-If you're more comfortable with mounting data to a data container, the commands you execute at the first time will look like as follows:
-
-```
-# Create data container
-docker run --name=gogs-data --entrypoint /bin/true gogs/gogs
-
-# Use `docker run` for the first time.
-docker run --name=gogs --volumes-from gogs-data -p 10022:22 -p 10080:3000 gogs/gogs
-```
-
-#### Using Docker 1.9 Volume command
-
-```
-# Create docker volume.
-$ docker volume create --name gogs-data
-
-# Use `docker run` for the first time.
-$ docker run --name=gogs -p 10022:22 -p 10080:3000 -v gogs-data:/data gogs/gogs
-```
-
-## Settings
-
-### Application
-
-Most of settings are obvious and easy to understand, but there are some settings can be confusing by running Gogs inside Docker:
-
-- **Repository Root Path**: keep it as default value `/home/git/gogs-repositories` because `start.sh` already made a symbolic link for you.
-- **Run User**: keep it as default value `git` because `start.sh` already setup a user with name `git`.
-- **Domain**: fill in with Docker container IP (e.g. `192.168.99.100`). But if you want to access your Gogs instance from a different physical machine, please fill in with the hostname or IP address of the Docker host machine.
-- **SSH Port**: Use the exposed port from Docker container. For example, your SSH server listens on `22` inside Docker, but you expose it by `10022:22`, then use `10022` for this value. **Builtin SSH server is not recommended inside Docker Container**
-- **HTTP Port**: Use port you want Gogs to listen on inside Docker container. For example, your Gogs listens on `3000` inside Docker, and you expose it by `10080:3000`, but you still use `3000` for this value.
-- **Application URL**: Use combination of **Domain** and **exposed HTTP Port** values (e.g. `http://192.168.99.100:10080/`).
-
-Full documentation of application settings can be found [here](https://gogs.io/docs/advanced/configuration_cheat_sheet.html).
-
-### Container options
-
-This container have some options available via environment variables, these options are opt-in features that can help the administration of this container:
-
-- **SOCAT_LINK**:
-  - <u>Possible value:</u>
-      `true`, `false`, `1`, `0`
-  - <u>Default:</u>
-      `true`
-  - <u>Action:</u>
-      Bind linked docker container to localhost socket using socat.
-      Any exported port from a linked container will be binded to the matching port on localhost.
-  - <u>Disclaimer:</u>
-      As this option rely on the environment variable created by docker when a container is linked, this option should be deactivated in managed environment such as Rancher or Kubernetes (set to `0` or `false`)
-- **RUN_CROND**:
-  - <u>Possible value:</u>
-      `true`, `false`, `1`, `0`
-  - <u>Default:</u>
-      `false`
-  - <u>Action:</u>
-      Request crond to be run inside the container. Its default configuration will periodically run all scripts from `/etc/periodic/${period}` but custom crontabs can be added to `/var/spool/cron/crontabs/`.
-
-## Upgrade
-
-:exclamation::exclamation::exclamation:<span style="color: red">**Make sure you have volumed data to somewhere outside Docker container**</span>:exclamation::exclamation::exclamation:
-
-Steps to upgrade Gogs with Docker:
-
-- `docker pull gogs/gogs`
-- `docker stop gogs`
-- `docker rm gogs`
-- Finally, create container as the first time and don't forget to do same volume and port mapping.
-
-## Known Issues
-
-- The docker container can not currently be build on Raspberry 1 (armv6l) as our base image `alpine` does not have a `go` package available for this platform.
diff --git a/docker/build.sh b/docker/build.sh
deleted file mode 100755
index 9965cef376..0000000000
--- a/docker/build.sh
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/bin/sh
-set -x
-set -e
-
-# Set temp environment vars
-export GOPATH=/tmp/go
-export PATH=${PATH}:${GOPATH}/bin
-export GO15VENDOREXPERIMENT=1
-
-# Install build deps
-apk --no-cache --no-progress add --virtual build-deps build-base linux-pam-dev go
-
-# Install glide
-git clone -b 0.10.2 https://github.com/Masterminds/glide ${GOPATH}/src/github.com/Masterminds/glide
-cd ${GOPATH}/src/github.com/Masterminds/glide
-make build
-go install
-
-
-
-# Build Gogs
-mkdir -p ${GOPATH}/src/github.com/gogits/
-ln -s /app/gogs/ ${GOPATH}/src/github.com/go-gitea/gitea
-cd ${GOPATH}/src/github.com/go-gitea/gitea
-glide install
-make build TAGS="sqlite cert pam"
-
-# Cleanup GOPATH & vendoring dir
-rm -r $GOPATH /app/gogs/vendor
-
-# Remove build deps
-apk --no-progress del build-deps
-
-# Create git user for Gogs
-adduser -H -D -g 'Gogs Git User' git -h /data/git -s /bin/bash && passwd -u git
-echo "export GITEA_CUSTOM=${GITEA_CUSTOM}" >> /etc/profile
diff --git a/docker/nsswitch.conf b/docker/etc/nsswitch.conf
index 70eb1733f4..25fad995e6 100644
--- a/docker/nsswitch.conf
+++ b/docker/etc/nsswitch.conf
@@ -13,4 +13,3 @@ ethers:         db files
 rpc:            db files
 
 netgroup:       nis
-
diff --git a/docker/etc/profile.d/gitea.sh b/docker/etc/profile.d/gitea.sh
new file mode 100755
index 0000000000..41afd4cfb8
--- /dev/null
+++ b/docker/etc/profile.d/gitea.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+export GITEA_CUSTOM=/data/gitea
diff --git a/docker/etc/s6/.s6-svscan/finish b/docker/etc/s6/.s6-svscan/finish
new file mode 100755
index 0000000000..06bd986563
--- /dev/null
+++ b/docker/etc/s6/.s6-svscan/finish
@@ -0,0 +1,2 @@
+#!/bin/bash
+exit 0
diff --git a/docker/etc/s6/gitea/finish b/docker/etc/s6/gitea/finish
new file mode 100755
index 0000000000..06bd986563
--- /dev/null
+++ b/docker/etc/s6/gitea/finish
@@ -0,0 +1,2 @@
+#!/bin/bash
+exit 0
diff --git a/docker/etc/s6/gitea/run b/docker/etc/s6/gitea/run
new file mode 100755
index 0000000000..246e74d27c
--- /dev/null
+++ b/docker/etc/s6/gitea/run
@@ -0,0 +1,6 @@
+#!/bin/bash
+[[ -f ./setup ]] && source ./setup
+
+pushd /app/gitea > /dev/null
+    exec gosu git /app/gitea/gitea web
+popd
diff --git a/docker/etc/s6/gitea/setup b/docker/etc/s6/gitea/setup
new file mode 100755
index 0000000000..27ca49db30
--- /dev/null
+++ b/docker/etc/s6/gitea/setup
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+if [ ! -d /data/git/.ssh ]; then
+    mkdir -p /data/git/.ssh
+    chmod 700 /data/git/.ssh
+fi
+
+if [ ! -f /data/git/.ssh/environment ]; then
+    echo "GITEA_CUSTOM=/data/gitea" >| /data/git/.ssh/environment
+    chmod 600 /data/git/.ssh/environment
+fi
+
+if [ ! -f /data/gitea/conf/app.ini ]; then
+    mkdir -p /data/gitea/conf
+    cp /etc/templates/app.ini /data/gitea/conf/app.ini
+fi
+
+chown -R git:git /data/gitea /app/gitea /data/git
+chmod 0755 /data/gitea /app/gitea /data/git
diff --git a/docker/etc/s6/openssh/finish b/docker/etc/s6/openssh/finish
new file mode 100755
index 0000000000..06bd986563
--- /dev/null
+++ b/docker/etc/s6/openssh/finish
@@ -0,0 +1,2 @@
+#!/bin/bash
+exit 0
diff --git a/docker/etc/s6/openssh/run b/docker/etc/s6/openssh/run
new file mode 100755
index 0000000000..b4c4cb4088
--- /dev/null
+++ b/docker/etc/s6/openssh/run
@@ -0,0 +1,6 @@
+#!/bin/bash
+[[ -f ./setup ]] && source ./setup
+
+pushd /root > /dev/null
+    exec gosu root /usr/sbin/sshd -E /var/log/sshd.log -D
+popd
diff --git a/docker/etc/s6/openssh/setup b/docker/etc/s6/openssh/setup
new file mode 100755
index 0000000000..b529431a15
--- /dev/null
+++ b/docker/etc/s6/openssh/setup
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+if [ ! -d /data/ssh ]; then
+    mkdir -p /data/ssh
+fi
+
+if [ ! -f /data/ssh/ssh_host_ed25519_key ]; then
+    echo "Generating /data/ssh/ssh_host_ed25519_key..."
+    ssh-keygen -t ed25519 -b 4096 -f /data/ssh/ssh_host_ed25519_key -N "" > /dev/null
+fi
+
+if [ ! -f /data/ssh/ssh_host_rsa_key ]; then
+    echo "Generating /data/ssh/ssh_host_rsa_key..."
+    ssh-keygen -t rsa -b 2048 -f /data/ssh/ssh_host_rsa_key -N "" > /dev/null
+fi
+
+if [ ! -f /data/ssh/ssh_host_dsa_key ]; then
+    echo "Generating /data/ssh/ssh_host_dsa_key..."
+    ssh-keygen -t dsa -f /data/ssh/ssh_host_dsa_key -N "" > /dev/null
+fi
+
+if [ ! -f /data/ssh/ssh_host_ecdsa_key ]; then
+    echo "Generating /data/ssh/ssh_host_ecdsa_key..."
+    ssh-keygen -t ecdsa -b 256 -f /data/ssh/ssh_host_ecdsa_key -N "" > /dev/null
+fi
+
+chown root:root /data/ssh/*
+chmod 0700 /data/ssh
+chmod 0600 /data/ssh/*
diff --git a/docker/etc/s6/syslogd/finish b/docker/etc/s6/syslogd/finish
new file mode 100755
index 0000000000..06bd986563
--- /dev/null
+++ b/docker/etc/s6/syslogd/finish
@@ -0,0 +1,2 @@
+#!/bin/bash
+exit 0
diff --git a/docker/etc/s6/syslogd/run b/docker/etc/s6/syslogd/run
new file mode 100755
index 0000000000..d876093047
--- /dev/null
+++ b/docker/etc/s6/syslogd/run
@@ -0,0 +1,6 @@
+#!/bin/bash
+[[ -f ./setup ]] && source ./setup
+
+pushd /root > /dev/null
+    exec gosu root /sbin/syslogd -nS -O-
+popd
diff --git a/docker/etc/s6/syslogd/setup b/docker/etc/s6/syslogd/setup
new file mode 100755
index 0000000000..a9bf588e2f
--- /dev/null
+++ b/docker/etc/s6/syslogd/setup
@@ -0,0 +1 @@
+#!/bin/bash
diff --git a/docker/sshd_config b/docker/etc/ssh/sshd_config
index 30c4e23c08..991b5196a0 100644
--- a/docker/sshd_config
+++ b/docker/etc/ssh/sshd_config
@@ -1,16 +1,33 @@
 Port 22
+Protocol 2
+
 AddressFamily any
 ListenAddress 0.0.0.0
 ListenAddress ::
-Protocol 2
+
 LogLevel INFO
+
+HostKey /data/ssh/ssh_host_ed25519_key
 HostKey /data/ssh/ssh_host_rsa_key
 HostKey /data/ssh/ssh_host_dsa_key
 HostKey /data/ssh/ssh_host_ecdsa_key
-HostKey /data/ssh/ssh_host_ed25519_key
+
+AuthorizedKeysFile .ssh/authorized_keys
+
+UseDNS no
+AllowAgentForwarding no
+AllowTcpForwarding no
+PrintMotd no
+PrintLastLog no
+
+PermitUserEnvironment yes
 PermitRootLogin no
-AuthorizedKeysFile	.ssh/authorized_keys
+ChallengeResponseAuthentication no
 PasswordAuthentication no
-UsePrivilegeSeparation no
-PermitUserEnvironment yes
+PermitEmptyPasswords no
+
 AllowUsers git
+
+Banner none
+Subsystem sftp /usr/lib/ssh/sftp-server
+UsePrivilegeSeparation no
diff --git a/docker/etc/templates/app.ini b/docker/etc/templates/app.ini
new file mode 100644
index 0000000000..0c4b9d6595
--- /dev/null
+++ b/docker/etc/templates/app.ini
@@ -0,0 +1,24 @@
+[repository]
+ROOT = /data/git/repositories
+
+[repository.upload]
+TEMP_PATH = /data/gitea/uploads
+
+[server]
+APP_DATA_PATH = /data/gitea
+
+[database]
+HOST = mysql:3306
+PATH = /data/gitea/gitea.db
+
+[session]
+PROVIDER_CONFIG = /data/gitea/sessions
+
+[picture]
+AVATAR_UPLOAD_PATH = /data/gitea/avatars
+
+[attachment]
+PATH = /data/gitea/attachments
+
+[log]
+ROOT_PATH = /data/gitea/log
diff --git a/docker/s6/.s6-svscan/finish b/docker/s6/.s6-svscan/finish
deleted file mode 100755
index 3fab7f42e5..0000000000
--- a/docker/s6/.s6-svscan/finish
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/bin/sh
-
-# Cleanup SOCAT services and s6 event folder
-rm -rf $(find /app/gogs/docker/s6/ -name 'event')
-rm -rf /app/gogs/docker/s6/SOCAT_*
diff --git a/docker/s6/crond/down b/docker/s6/crond/down
deleted file mode 100644
index e69de29bb2..0000000000
--- a/docker/s6/crond/down
+++ /dev/null
diff --git a/docker/s6/crond/run b/docker/s6/crond/run
deleted file mode 100755
index 9aa9fb9f27..0000000000
--- a/docker/s6/crond/run
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/bin/sh
-# Crontabs are located by default in /var/spool/cron/crontabs/
-# The default configuration is also calling all the scripts in /etc/periodic/${period}
-
-if test -f ./setup; then
-    source ./setup
-fi
-
-exec gosu root /usr/sbin/crond -fS
diff --git a/docker/s6/gogs/run b/docker/s6/gogs/run
deleted file mode 100755
index 1aa70eb41d..0000000000
--- a/docker/s6/gogs/run
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/sh
-
-if test -f ./setup; then
-    source ./setup
-fi
-
-export USER=git
-exec gosu $USER /app/gogs/gogs web
diff --git a/docker/s6/gogs/setup b/docker/s6/gogs/setup
deleted file mode 100755
index 8435e25b6b..0000000000
--- a/docker/s6/gogs/setup
+++ /dev/null
@@ -1,23 +0,0 @@
-#!/bin/sh
-
-if ! test -d ~git/.ssh; then
-    mkdir -p ~git/.ssh
-    chmod 700 ~git/.ssh
-fi
-
-if ! test -f ~git/.ssh/environment; then
-    echo "GITEA_CUSTOM=${GITEA_CUSTOM}" > ~git/.ssh/environment
-    chmod 600 ~git/.ssh/environment
-fi
-
-cd /app/gogs
-
-# Link volumed data with app data
-ln -sf /data/gogs/log  ./log
-ln -sf /data/gogs/data ./data
-
-# Backward Compatibility with Gogs Container v0.6.15
-ln -sf /data/git /home/git
-
-chown -R git:git /data /app/gogs ~git/
-chmod 0755 /data /data/gogs ~git/
diff --git a/docker/s6/openssh/run b/docker/s6/openssh/run
deleted file mode 100755
index 99172aab69..0000000000
--- a/docker/s6/openssh/run
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh
-
-if test -f ./setup; then
-    source ./setup
-fi
-
-exec gosu root /usr/sbin/sshd -D -f /app/gogs/docker/sshd_config
diff --git a/docker/s6/openssh/setup b/docker/s6/openssh/setup
deleted file mode 100755
index 5333d3c06e..0000000000
--- a/docker/s6/openssh/setup
+++ /dev/null
@@ -1,23 +0,0 @@
-#!/bin/sh
-
-# Check if host keys are present, else create them
-if ! test -f /data/ssh/ssh_host_rsa_key; then
-    ssh-keygen -q -f /data/ssh/ssh_host_rsa_key -N '' -t rsa
-fi
-
-if ! test -f /data/ssh/ssh_host_dsa_key; then
-    ssh-keygen -q -f /data/ssh/ssh_host_dsa_key -N '' -t dsa
-fi
-
-if ! test -f /data/ssh/ssh_host_ecdsa_key; then
-    ssh-keygen -q -f /data/ssh/ssh_host_ecdsa_key -N '' -t ecdsa
-fi
-
-if ! test -f /data/ssh/ssh_host_ed25519_key; then
-    ssh-keygen -q -f /data/ssh/ssh_host_ed25519_key -N '' -t ed25519
-fi
-
-# Set correct right to ssh keys
-chown -R root:root /data/ssh/*
-chmod 0700 /data/ssh
-chmod 0600 /data/ssh/*
diff --git a/docker/s6/syslogd/run b/docker/s6/syslogd/run
deleted file mode 100755
index f7bdbe36d6..0000000000
--- a/docker/s6/syslogd/run
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/sh
-
-if test -f ./setup; then
-    source ./setup
-fi
-
-exec gosu root /sbin/syslogd -nS -O-
diff --git a/docker/start.sh b/docker/start.sh
deleted file mode 100755
index a54c2a9bfd..0000000000
--- a/docker/start.sh
+++ /dev/null
@@ -1,65 +0,0 @@
-#!/bin/sh
-
-create_socat_links() {
-    # Bind linked docker container to localhost socket using socat
-    USED_PORT="3000:22"
-    while read NAME ADDR PORT; do
-        if test -z "$NAME$ADDR$PORT"; then
-            continue
-        elif echo $USED_PORT | grep -E "(^|:)$PORT($|:)" > /dev/null; then
-            echo "init:socat  | Can't bind linked container ${NAME} to localhost, port ${PORT} already in use" 1>&2
-        else
-            SERV_FOLDER=/app/gogs/docker/s6/SOCAT_${NAME}_${PORT}
-            mkdir -p ${SERV_FOLDER}
-            CMD="socat -ls TCP4-LISTEN:${PORT},fork,reuseaddr TCP4:${ADDR}:${PORT}"
-            echo -e "#!/bin/sh\nexec $CMD" > ${SERV_FOLDER}/run
-            chmod +x ${SERV_FOLDER}/run
-            USED_PORT="${USED_PORT}:${PORT}"
-            echo "init:socat  | Linked container ${NAME} will be binded to localhost on port ${PORT}" 1>&2
-        fi
-    done << EOT
-    $(env | sed -En 's|(.*)_PORT_([0-9]+)_TCP=tcp://(.*):([0-9]+)|\1 \3 \4|p')
-EOT
-}
-
-cleanup() {
-    # Cleanup SOCAT services and s6 event folder
-    # On start and on shutdown in case container has been killed
-    rm -rf $(find /app/gogs/docker/s6/ -name 'event')
-    rm -rf /app/gogs/docker/s6/SOCAT_*
-}
-
-create_volume_subfolder() {
-    # Create VOLUME subfolder
-    for f in /data/gogs/data /data/gogs/conf /data/gogs/log /data/git /data/ssh; do
-        if ! test -d $f; then
-            mkdir -p $f
-        fi
-    done
-}
-
-cleanup
-create_volume_subfolder
-
-LINK=$(echo "$SOCAT_LINK" | tr '[:upper:]' '[:lower:]')
-if [ "$LINK" = "false" -o "$LINK" = "0" ]; then
-    echo "init:socat  | Will not try to create socat links as requested" 1>&2
-else
-    create_socat_links
-fi
-
-CROND=$(echo "$RUN_CROND" | tr '[:upper:]' '[:lower:]')
-if [ "$CROND" = "true" -o "$CROND" = "1" ]; then
-    echo "init:crond  | Cron Daemon (crond) will be run as requested by s6" 1>&2
-    rm -f /app/gogs/docker/s6/crond/down
-else
-    # Tell s6 not to run the crond service
-    touch /app/gogs/docker/s6/crond/down
-fi
-
-# Exec CMD or S6 by default if nothing present
-if [ $# -gt 0 ];then
-    exec "$@"
-else
-    exec /bin/s6-svscan /app/gogs/docker/s6/
-fi
diff --git a/docker/usr/bin/entrypoint b/docker/usr/bin/entrypoint
new file mode 100755
index 0000000000..a450d20607
--- /dev/null
+++ b/docker/usr/bin/entrypoint
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+for FOLDER in /data/gitea/conf /data/gitea/log /data/git /data/ssh; do
+    mkdir -p ${FOLDER}
+done
+
+if [ $# -gt 0 ]; then
+    exec "$@"
+else
+    exec /bin/s6-svscan /etc/s6
+fi