Germany established a Socialist Party coalition government within a few days, with the Social Democratic Party leader Eitzberger taking over power and becoming Chancellor.
(The image above shows Friedrich Ebert, who became Chancellor of the coalition government after the German Revolution succeeded, later being elected as the first President of the Weimar Republic. Note: The Weimar Republic was not established immediately after Germany's defeat but was formed in Weimar after a constitution was drafted over nine months later, managed by a provisional government until then.)
After Ebert became Chancellor, he considered that the most important task at present was to reach an armistice agreement with the Allies, and therefore immediately established the "Armistice Committee," with Eitzberger as the chairman to negotiate with the Allies on behalf of Germany.
