theohbrothers / docker-chrony

Dockerized chrony based on alpine 🐳

docker-chrony

Dockerized chrony based on alpine.

Tags

Tag	Dockerfile Build Context
:4.5, :latest	View
:4.3	View
:4.2	View
:4.1	View
:4.0	View
:3.5.1	View

Usage

No NTS

# Create a custom config file if needed. See: https://chrony.tuxfamily.org/doc/v4.0/chrony.conf.html#examples
cat - > chrony.conf <<'EOF'
pool pool.ntp.org iburst
initstepslew 10 pool.ntp.org
driftfile /var/lib/chrony/chrony.drift
makestep 1.0 3
rtcsync
allow all
EOF

# Start server
docker run -it -p 123:123/udp -v $(pwd)/chrony.conf:/etc/chrony/chrony.conf:ro theohbrothers/docker-chrony:v4.2

# Start server (sync the system clock)
docker run -it --cap-add SYS_TIME -p 123:123/udp -v $(pwd)/chrony.conf:/etc/chrony/chrony.conf:ro theohbrothers/docker-chrony:v4.2 -d

Upstream NTS

# Create a custom config file if needed. See: https://chrony.tuxfamily.org/doc/v4.0/chrony.conf.html#examples
cat - > chrony.conf <<'EOF'
server time.cloudflare.com iburst nts
initstepslew 10 time.cloudflare.com
driftfile /var/lib/chrony/chrony.drift
makestep 1.0 3
rtcsync
allow all
EOF

# Start server
docker run -it -p 123:123/udp -v $(pwd)/chrony.conf:/etc/chrony/chrony.conf:ro theohbrothers/docker-chrony:v4.2

# Start server (sync the system clock)
docker run -it --cap-add SYS_TIME -p 123:123/udp -v $(pwd)/chrony.conf:/etc/chrony/chrony.conf:ro theohbrothers/docker-chrony:v4.2 -d

From local system clock

# Create a custom config file if needed. See: https://chrony.tuxfamily.org/doc/v4.0/chrony.conf.html#examples
cat - > chrony.conf <<'EOF'
initstepslew 10 client1 client3 client6
driftfile /var/lib/chrony/chrony.drift
local stratum 8
rtcsync
allow all
EOF

# Start server
docker run -it -p 123:123/udp -v $(pwd)/chrony.conf:/etc/chrony/chrony.conf:ro theohbrothers/docker-chrony:v4.2

Development

Requires Windows powershell or pwsh.

# Install Generate-DockerImageVariants module: https://github.com/theohbrothers/Generate-DockerImageVariants
Install-Module -Name Generate-DockerImageVariants -Repository PSGallery -Scope CurrentUser -Force -Verbose

# Edit ./generate templates

# Generate the variants
Generate-DockerImageVariants .